JP3350255B2 - Elevator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an inverter circuit for controlling an electric motor for driving an elevator, a regenerative resistor for absorbing regenerative energy generated in a regenerative mode, and a brake circuit comprising a semiconductor element for absorbing regenerative energy. A regenerative circuit is provided, and the normal operation of the elevator is performed by the main power supply via the inverter circuit, and an emergency power supply is provided. The present invention relates to an elevator control device, and more particularly to an elevator control device using a semiconductor device for a brake circuit having a small rated current so that regenerative control can be performed both during normal operation and during a power failure rescue operation.

[0002]

2. Description of the Related Art Generally, when a power failure occurs in a building during operation of an elevator, the elevator stops between floors, and confinement in which passengers are trapped in a car may occur.

[0003] Therefore, as a countermeasure against this, conventionally, in order to transfer the passengers trapped in the car to the entrance on the nearest floor, a rescue operation at the time of a power outage of the elevator is performed by a battery power supply as an emergency power supply. I have.

FIG. 4 is a block diagram showing an example of the configuration of a conventional elevator control device equipped with this kind of power failure rescue operation device. In FIG. 4, main controller 1 includes a rectifier circuit 12 for full-wave rectifying three-phase alternating current of main power supply 11 which is a commercial power supply.
And a smoothing capacitor 13 for absorbing the ripple of the output from the rectifier circuit 12, a three-phase inverter circuit 14a composed of a semiconductor element such as an IGBT, and a brake circuit 14b composed of a semiconductor element such as a transistor for controlling a regenerative operation. And a regenerative resistor 1 connected in series to the brake circuit 14b for absorbing regenerative energy.
6 constitutes a main circuit to control an electric motor (eg, an induction motor) 3 for driving the elevator.

[0005] The rescue operation device 2 at the time of power failure includes a storage battery 18 as an emergency power supply for supplying electric power at the time of a power failure of the main power supply 11, and an electric motor for elevator driving by the main control device 1 which is turned off during normal operation. 3 and the main power supply 1
The contactor 19 is turned on at the time of the power outage 1 and controls the elevator driving motor 3 by the power outage rescue operation device 2, and the main controller 1 prevents a current from flowing back to the power outage rescue operation device 2 main body side. Backflow prevention diode 20 is provided.

That is, this type of elevator control device includes a main control device 1 for normal operation of the elevator and a power saving rescue operation device 2 for rescue operation of the elevator during a power failure. 19
Is turned off, and the main control device 1 controls the elevator driving motor 3, while at the time of power failure of the main power supply 11, the contactor 19 is turned on, and the elevator driving motor 3 is controlled by the power failure rescue operation device 2. Like that.

On the other hand, when the regenerative energy generated in the regenerative mode during the normal operation reaches the regenerative voltage level during the normal operation, the brake circuit 14b operates to be absorbed by the regenerative resistor 16.

The regenerative energy generated in the regenerative mode when the power failure rescue operation device 2 is operating becomes the regenerative voltage level at the time of the power failure, operates the brake circuit 14 b and is absorbed by the regenerative resistor 16.

Hereinafter, the relationship between the regenerative energy and the resistance value of the regenerative resistor 16 based on the rating of the semiconductor element for the brake circuit 14b in such an elevator control device will be described.

First, the regenerative energy P of the induction motor in the regenerative mode is generally represented by the following equation. P = {[W × V × (1-OB)] / 6120} × ηB (KW) (1) where, W; constant load V; B. Overbalance ηB; elevator back efficiency The maximum regenerative energy P _max is represented by the following equation.

P _max = (T _FLDACC / T _FLD ) × P × (V ₂ / V) (KW) (2) where T _FLDACC ; full load lowering deceleration torque T _FLD ; full load lowering torque V ₂ ; Maximum regenerative energy output point From the above, this maximum regenerative energy P _max
Since the light must be absorbed by R, the following equation holds.

P _max ≦ (V _det ² / PBR) (3) where V _det ; DC main circuit voltage during regeneration PRB; regenerative resistance value PBR ≦ (V _det ² / P _max ) ≧ (3 ′) If the on-state current of the semiconductor element of the brake circuit 14b is within 65% of the rated value, the following equation is established.

(V _DC / I _cmax ) ≦ PBR (4) where, V _DC ; the maximum value of the DC main circuit voltage (380 V) I _cmax ; 65% of the rating of the semiconductor element of the brake circuit 14b, the value of the regenerative resistance PBR In considering (3), it is necessary to select from the above equations (3 ′) and (4) so that the following inequality holds.

(V _DC / I _cmax ) ≦ PBR ≦ (V _det ² / P _max ) By the way, the regenerative voltage level of the main circuit DC section during the operation of the power failure rescue operation device 2 of the elevator is determined by the storage battery 18.
Is set to a voltage that does not cause breakage, and thus has a lower value than during normal operation of the elevator. for that reason,
The regenerative resistance value PBR1 during normal operation of the elevator is different from the regenerative resistance value PBR2 during rescue operation during power failure of the elevator.

Generally, PBR1> PBR2 holds.

Therefore, the value of the regenerative resistor 16 in the above-described elevator control device is determined by the regenerative resistance value PBR2 during the rescue operation at the time of power failure of the elevator, subject to regulation. Therefore, since the regenerative resistance value is small, the rated current of the semiconductor element for the brake circuit 14b becomes large. Further, since the resistance value is small, the internal winding of the resistor becomes thick, and the resistance itself becomes expensive. As a result, the cost of the regenerative circuit is increased.

On the other hand, recently, in order to reduce the cost of the regenerative circuit, the inverter element and the brake circuit are housed in a single package in a semiconductor element constituting the inverter circuit, thereby reducing the size, reducing the number of assembly steps, and reducing the inductance. It has been proposed to adopt a composite module which improves reliability by eliminating the need for wiring and wiring, in an elevator control device.

However, in this case, the rated current value of the semiconductor element for the brake circuit in the composite module is lower than the rated current value of the semiconductor element for the inverter circuit. Therefore, it is not possible to absorb the regenerative energy generated in the regenerative mode at the time of the power failure rescue operation of the elevator.

Therefore, the DC main circuit voltage at the time of a power failure does not drop sufficiently and the rescue operation device at the time of power failure 2 may be damaged. However, a composite module including an inverter circuit and a brake circuit cannot be employed.

[0020]

As described above, in a conventional elevator control device provided with a power failure rescue operation device, a combined module including an inverter circuit and a brake circuit cannot be employed, and thus a brake circuit is not provided. There is a problem that the cost of the semiconductor element and the regenerative resistor increases.

An object of the present invention is to provide an elevator control provided with a power failure rescue operation device capable of reducing the cost of a semiconductor element for a brake circuit and a regenerative resistor by employing a composite module including an inverter circuit and a brake circuit. It is to provide a device.

[0022]

In order to achieve the above object, according to the first aspect of the present invention, an inverter circuit for controlling an electric motor for driving an elevator and a regenerative energy generated in a regenerative mode are absorbed. A regenerative circuit having a regenerative resistor and a regenerative circuit having a brake circuit made of a semiconductor element that absorbs regenerative energy, a main control device that receives power supply from a main power supply and performs normal operation of the elevator, and an emergency power supply. An emergency power supply rescue operation device that performs emergency rescue operation by switching an emergency power supply to a main control device when a power outage occurs in a power outage rescue operation device. The regenerative resistance of the regenerative resistor is lower than the regenerative resistor during normal operation of the elevator with the main power supply. Consisting comprises a regenerative resistance switching control means for switching control of the resistance value.

Here, in particular, the regenerative resistor is constituted by connecting a plurality of resistors in series, and the regenerative resistor switching control means includes: a relay that operates during emergency power failure rescue operation of the elevator; It is desirable that the switching device be constituted by a changeover switch that short-circuits a part of the resistor constituting the regenerative resistor by operation.

Further, the regenerative resistor is configured so that a plurality of resistors can be connected in parallel, and the regenerative resistor switching control means includes a relay that operates during a power failure rescue operation of the elevator using an emergency power supply, and a relay that operates. It is desirable that the regenerative resistor comprises a changeover switch for turning on a part of the resistor.

On the other hand, in the invention according to claim 4, the inverter circuit for controlling the electric motor for driving the elevator, the first regenerative resistor for absorbing the regenerative energy generated in the regenerative mode, and the semiconductor element for absorbing the regenerative energy A first regenerative circuit having a first brake circuit, and a main control device for performing normal operation of the elevator by receiving power supply from the main power supply; and an emergency power supply. A power failure rescue operation device that switches the power supply to the main control device to perform a rescue operation during a power failure of the elevator, the resistance control device having a resistance value lower than the resistance value of the first regenerative resistor; A second regenerative resistor that absorbs regenerative energy generated in the regenerative mode, and a second brake circuit that includes a semiconductor element that absorbs regenerative energy. The switching control of the regenerative circuit is performed such that the second regenerative circuit performs the first regenerative circuit during the normal operation of the elevator using the main power supply, and the second regenerative circuit during the rescue operation during the power failure of the elevator using the emergency power supply. And a regenerative circuit switching control means.

Here, the regenerative circuit switching control means particularly includes a relay which operates during rescue operation of the elevator due to an emergency power supply during a power outage, a second regenerative circuit side when the relay does not operate, and a second relay which operates by the relay. It is desirable that the regenerative circuit be provided with a changeover switch for switching the regenerative circuit.

[0027]

Therefore, in the elevator control apparatus according to the first aspect of the present invention, the resistance value of the regenerative resistance during the rescue operation at the time of power failure of the elevator is set lower than the resistance value of the regenerative resistance during the normal operation of the elevator. By switching the resistance value of the regenerative resistor, it is possible to cause the regenerative circuit to perform regenerative operation.Thus, the semiconductor device for the brake circuit with a small rated current can be used during normal operation of the elevator and during rescue operation during power failure. Can also perform regenerative operation.

Further, in the elevator control apparatus according to the present invention, the resistance value of the regenerative resistance during the rescue operation during a power failure of the elevator is set lower than the resistance value of the regenerative resistance during the normal operation of the elevator. By switching the regenerative circuit during normal operation of the elevator and during rescue operation at the time of power failure operation, it is possible to cause the regenerative circuit to perform a regenerative operation. The regenerative operation can be performed both during normal operation of the elevator and during rescue operation during a power failure.

As described above, a semiconductor device for a brake circuit having a low rated current value can be used as a regenerative circuit of an elevator, so that cost can be reduced. Further, since a regenerative resistor having a low resistance value is not used, the cost can be further reduced. Furthermore, since a composite module that integrates an inverter circuit and a brake circuit into a single package can be used for the elevator control device, the elevator control device can be reduced in size, the number of assembly steps can be reduced, the inductance can be reduced, and reliability can be improved without wiring. I can plan.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a resistance value of a regenerative resistor for absorbing regenerative energy generated in a normal mode of operation of an elevator by a main power supply and a regenerative mode in a rescue operation during a power failure of the elevator by an emergency power supply. The regenerative resistance is changed so that the regenerative resistance that absorbs the regenerative energy to be made is lower during rescue operation during power failure than the regenerative resistance during normal operation. Alternatively, a regenerative circuit during normal operation of the elevator and operation of the rescue operation device during a power failure so that the resistance value of the regenerative resistance during the rescue operation during a power failure of the elevator is lower than the resistance value of the regenerative resistance during the normal operation of the elevator. Switching between the regenerative mode during normal operation of the elevator using the main power source and the regenerative mode during rescue operation during a power outage of the elevator using the emergency power source. In any of the operation is also controlled in such to perform regenerative operation by the regenerative circuit using a semiconductor device for a small brake circuit of the rated current.

Hereinafter, embodiments of the present invention based on the above concept will be described in detail with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a configuration example of an elevator control device according to a first embodiment of the present invention.
The same elements as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described here.

That is, as shown in FIG. 1, the elevator control apparatus according to the present embodiment includes a three-phase inverter circuit 14a composed of a semiconductor element such as an IGBT and a brake circuit 14b composed of a semiconductor element such as a transistor for controlling a regenerative operation.
Are combined into a single package to form a regenerative circuit as a composite module 14.

A regenerative resistor 15 for absorbing regenerative energy is connected in series to the regenerative resistor 16, and a regenerative resistor 15 is connected to the regenerative resistor 15 to operate during rescue operation of the elevator by the storage battery 18 during a power outage. The changeover switch 17 which closes by the operation of (1) is connected in parallel.

The regenerative resistance switching control means is constituted by a relay (not shown) and the changeover switch 17. Here, the combined resistance value of the regenerative resistors 15 and 16 is a value that satisfies Expression (5) during the normal operation of the elevator described above. Further, the resistance value of the regenerative resistor 16 is set to a value that satisfies the expression (5) at the time of the operation of the above-described elevator power failure rescue operation device 2.

Next, the operation of the elevator control device of the present embodiment configured as described above will be described. First, during normal operation of the elevator, since the contactor 19 is off, the power failure rescue operation device 2 is disconnected, and the main power supply 11 is connected to the smoothing capacitor 13 which is a DC circuit of the main control device 1. Connected to both ends. And the main power supply 11
, A DC voltage is applied to the composite module 14, and the elevator driving motor 3 is inverter-controlled.

The regenerative energy generated in the regenerative mode during normal operation of the elevator is controlled by the changeover switch 1
When the regenerative voltage level at the time of normal operation of the elevator is attained, the brake circuit 14b in the composite module 14 is operated and the two regenerative resistors 15 and 16 absorb the regenerative voltage.

On the other hand, the contactor 19 is turned on at the time of rescue operation of the elevator during a power failure, so that the storage battery 18 housed in the power failure rescue operation device 2 includes the smoothing capacitor 13 which is a DC circuit of the main control device 1. Are connected to both ends.
When the power supply of the main power supply 11 fails, the contactor 19 is turned on.
4, a DC voltage is applied, and the elevator driving motor 3 is inverter-controlled.

Further, a rescue operation device 2 at the time of power failure of the elevator
The regenerative energy generated in the regenerative mode during the operation of the switch 1
When the regenerative voltage level at the time of the rescue operation at the time of the power failure of the elevator is turned on because the 7 is turned on, the brake circuit 14 b in the composite module 14 is operated to be absorbed by one regenerative resistor 16.

As described above, according to the present embodiment, the regenerative resistance of the elevator during the rescue operation during a power failure is made lower than the resistance of the regenerative resistance during the normal operation of the elevator. Since the regenerative resistance of the regenerative resistor is switched by short-circuiting a part of the regenerative resistor 15 that constitutes the brake circuit 14b, the regenerative circuit can perform a regenerative operation. By using the semiconductor element, the regenerative operation can be performed both during normal operation of the elevator and during rescue operation during a power failure.

As a result, the semiconductor element for the brake circuit 14b having a low rated current value can be used as a regenerative circuit for an elevator, so that the cost can be reduced.

Further, since a regenerative resistor having a low resistance value is not used, the cost can be further reduced. Further, the inverter circuit 14a and the brake circuit 14
Since the composite module 14 having b as one package can be used in the elevator control device, it is possible to reduce the size of the elevator control device, reduce the number of assembly steps, reduce the inductance, and improve the reliability by eliminating wiring. Become.

(Second Embodiment) FIG. 2 is a block diagram showing an example of the configuration of an elevator control apparatus according to a second embodiment of the present invention. The same elements as those in FIG. The description will be omitted, and only different portions will be described here.

That is, as shown in FIG. 2, the elevator control device of the present embodiment includes a three-phase inverter circuit 14a composed of a semiconductor element such as an IGBT and a brake circuit 14b composed of a semiconductor element such as a transistor for controlling a regenerative operation.
Are combined into a single package to form a regenerative circuit as a composite module 14.

The regenerative resistor 15 for absorbing regenerative energy and a changeover switch 17 that is closed by the operation of a not-shown relay 19 that operates during a power failure rescue operation of the elevator by the storage battery 18 are connected to the regenerative circuit. It is connected in parallel with the resistor 16.

The regenerative resistance switching control means is constituted by a relay (not shown) and the changeover switch 17. Here, the resistance value of the regenerative resistor 16 is a value that satisfies Expression (5) during the normal operation of the elevator described above. The combined resistance value of the regenerative resistors 15 and 16 is a value that satisfies Expression (5) during the operation of the elevator power failure rescue operation device 2 described above.

Next, the operation of the elevator control device of the present embodiment configured as described above will be described. First, during normal operation of the elevator, since the contactor 19 is off, the power failure rescue operation device 2 is disconnected, and the main power supply 11 is connected to the smoothing capacitor 13 which is a DC circuit of the main control device 1. Connected to both ends. And the main power supply 11
, A DC voltage is applied to the composite module 14, and the elevator driving motor 3 is inverter-controlled.

The regenerative energy generated in the regenerative mode during normal operation of the elevator is controlled by the changeover switch 1
When the regenerative voltage level at the time of normal operation of the elevator is attained, the brake circuit 14 b in the composite module 14 is operated and absorbed by one regenerative resistor 16 because the regenerative voltage 7 is off.

On the other hand, the contactor 19 is turned on during the rescue operation of the elevator during a power failure, so that the storage battery 18 housed in the power failure rescue operation device 2 includes the smoothing capacitor 13 which is a DC circuit of the main control device 1. Are connected to both ends.
When the power supply of the main power supply 11 fails, the contactor 19 is turned on.
4, a DC voltage is applied, and the elevator driving motor 3 is inverter-controlled.

The rescue operation device 2 at the time of power failure of the elevator
The regenerative energy generated in the regenerative mode during the operation of the switch 1
When the regenerative voltage level at the time of the rescue operation at the time of the power failure of the elevator is reached because the 7 is turned on, the brake circuit 14b in the composite module 14 is operated to operate the two regenerative resistors 15, 16
Is absorbed by

As described above, according to the present embodiment, the regenerative resistance of the elevator during the rescue operation during a power failure is made lower than the resistance of the regenerative resistance during the normal operation of the elevator. The regenerative resistor 15 is turned on to switch the resistance value of the regenerative resistor, so that the regenerative circuit can perform a regenerative operation. By using the semiconductor element, the regenerative operation can be performed both during normal operation of the elevator and during rescue operation during a power failure.

As a result, the semiconductor element for the brake circuit 14b having a low rated current value can be used as a regenerative circuit for an elevator, so that the cost can be reduced.

Further, since a regenerative resistor having a low resistance value is not used, the cost can be further reduced. Further, the inverter circuit 14a and the brake circuit 14
Since the composite module 14 having b as one package can be used in the elevator control device, it is possible to reduce the size of the elevator control device, reduce the number of assembly steps, reduce the inductance, and improve the reliability by eliminating wiring. Become.

(Third Embodiment) FIG. 3 is a block diagram showing an example of the configuration of an elevator control apparatus according to a third embodiment of the present invention. The same elements as those in FIG. The description will be omitted, and only different portions will be described here.

That is, as shown in FIG. 3, the elevator control device of the present embodiment has a three-phase inverter circuit 14a composed of a semiconductor element such as an IGBT and a brake circuit composed of a semiconductor element such as a transistor for controlling a regenerative operation. A regenerative circuit (hereinafter, referred to as a first regenerative circuit) is configured as the composite module 14 in which the first brake circuit (hereinafter, referred to as a first brake circuit) 14b is one package.

A regenerative resistor (hereinafter, referred to as a second regenerative resistor) 15 for absorbing regenerative energy and an external brake circuit (hereinafter, referred to as a second regenerative resistor) comprising a semiconductor element such as a transistor for controlling regenerative operation. (Referred to as brake circuit)
A regenerative circuit having 21 (hereinafter, referred to as a second regenerative circuit) is connected in series to the first regenerative circuit.

Further, a brake drive circuit 22 for operating the brake circuit is connected via an auxiliary contact 23a, which is a changeover switch that is closed by the operation of a relay (not shown) that operates during a power failure rescue operation of the elevator using the storage battery 18. The first brake circuit 14b is connected to the second brake circuit 21 via an auxiliary contact 23b, which is a changeover switch that closes when the relay is not operating.
Connected to

A not-shown relay and auxiliary contact 23a
The auxiliary contact 23b constitutes a regenerative circuit switching control means. Here, the resistance value of the regenerative resistor (hereinafter, referred to as a first regenerative resistor) 16 is a value that satisfies Expression (5) during the normal operation of the elevator described above. Further, the resistance value of the second regenerative resistor 15 is a value that satisfies the expression (5) at the time of the operation of the above-described elevator power failure rescue operation device 2.

Next, the operation of the elevator control apparatus of the present embodiment configured as described above will be described. First, during normal operation of the elevator, since the contactor 19 is off, the power failure rescue operation device 2 is disconnected, and the main power supply 11 is connected to the smoothing capacitor 13 which is a DC circuit of the main control device 1. Connected to both ends. And the main power supply 11
, A DC voltage is applied to the composite module 14, and the elevator driving motor 3 is inverter-controlled.

The regenerative energy generated in the regenerative mode during normal operation of the elevator is such that the auxiliary contact 23a is turned off and the auxiliary contact 23b is turned on due to the non-operation of a relay (not shown). The auxiliary contact 23b is connected to the first brake circuit 14b in the composite module 14 and when the regenerative voltage level during normal operation of the elevator is reached, the first brake circuit 14b in the composite module 14 is operated to It is absorbed by the regenerative resistor 16.

On the other hand, the contactor 19 is turned on at the time of rescue operation of the elevator during a power failure, so that the storage battery 18 housed in the power failure rescue operation device 2 includes the smoothing capacitor 13 which is a DC circuit of the main control device 1. Are connected to both ends.
When the power supply of the main power supply 11 fails, the contactor 19 is turned on.
4, a DC voltage is applied, and the elevator driving motor 3 is inverter-controlled.

In addition, the rescue operation device 2 at the time of power failure of the elevator
The regenerative energy generated in the regenerative mode at the time of the operation is such that the auxiliary contact 23a is turned on and the auxiliary contact 23b is turned off by the operation of a relay (not shown).
1, when the regenerative voltage level at the time of rescue operation at the time of power failure of the elevator is reached, the second brake circuit 21 is operated and absorbed by the second regenerative resistor 15.

As described above, according to the present embodiment, the resistance value of the regenerative resistor during the rescue operation during a power outage of the elevator is set lower than the resistance value of the regenerative resistance during the normal operation of the elevator. Since the regenerative circuit is switched between during normal operation and during power outage rescue operation, the regenerative circuit can perform regenerative operation.
By using the semiconductor elements for the brake circuits 14b and 21 having a small rated current, the regenerative operation can be performed both during normal operation of the elevator and during rescue operation during a power failure.

As a result, the semiconductor element for the first brake circuit 14b having a low rated current value can be used as a regenerative circuit for an elevator, so that the cost can be reduced.

Since a regenerative resistor having a low resistance value is not used, the cost can be further reduced. Furthermore, the composite module 14 in which the inverter circuit 14a and the first brake circuit 14b are integrated into one package
Can be adopted in the elevator control device, so that the size of the elevator control device can be reduced, the number of assembly steps can be reduced, the inductance can be reduced, and the reliability can be improved by eliminating wiring.

It should be noted that the present invention is not limited to the above embodiments, but can be implemented in the following manner. (A) In the third embodiment, the case has been described in which the first brake circuit 14b in the combined module 14 is used during normal operation of the elevator, and the second brake circuit 21 is used during rescue operation during power failure of the elevator. However, the present invention is not limited to this.
4, the same operation and effect as those described above can be obtained even when the second brake circuit 21 is used during normal operation of the elevator using the first brake circuit 14b.

In this case, the selection of the resistance value of the first regenerative resistor 16 and the resistance value of the second regenerative resistor 15 may be reversed in the case of the third embodiment. (B) In the third embodiment, as the changeover switch for switching the regenerative circuit between the normal operation of the elevator and the operation of the rescue operation device at the time of power failure, the auxiliary of the relay operated by the storage battery 18 at the time of the rescue operation of the elevator during the power failure is provided. Contact 2
Although the case where the auxiliary contacts 3a and the auxiliary contacts 23b are used has been described, the present invention is not limited to this, and the same operation and effects as those described above can be obtained by using the auxiliary contacts of the contactor 19.

[0067]

As described above, according to the present invention, the resistance value of the regenerative resistor absorbing the regenerative energy generated in the regenerative mode during normal operation of the elevator by the main power supply,
The resistance value of the regenerative resistor that absorbs the regenerative energy generated in the regenerative mode during rescue operation of an elevator due to an emergency power supply is smaller than the resistance value of the regenerative resistor during normal operation. In order to lower the value, switch the resistance value of the regenerative resistor, or lower the resistance value of the regenerative resistor during rescue operation during power failure of the elevator, than the resistance value of the regenerative resistor during normal operation of the elevator,
The regenerative circuit is switched between the normal operation of the elevator and the rescue operation at the time of power failure.The regenerative circuit operation at the normal operation of the elevator using the main power supply and the regeneration at the time of the power failure rescue operation of the elevator using the emergency power supply In both mode operation, the regenerative operation can be performed by the regenerative circuit using the semiconductor element for the brake circuit with a small rated current. An elevator control device including a power failure rescue operation device capable of reducing the cost of the element and the regenerative resistor can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of an elevator control device according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of the elevator control device according to the present invention.

FIG. 3 is a block diagram showing a third embodiment of the elevator control device according to the present invention.

FIG. 4 is a block diagram showing a configuration example of a conventional elevator control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main control device, 2 ... Power saving rescue operation device, 3 ... Elevator drive motor, 11 ... Main power supply, 12 ... Rectifier circuit, 1
3 ... smoothing capacitor, 14 ... composite module, 14a ...
Inverter circuit, 14b ... (first) brake circuit, 1
5 ... second regenerative resistor, 16 ... (first) regenerative resistor, 17
... Changeover switch, 18 ... Storage battery, 19 ... Contactor, 2
0: backflow prevention diode, 21: second brake circuit, 22: brake unit drive circuit, 23a: auxiliary contact, 2
3b ... Auxiliary contact.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B66B 1/00-1/52 B66B 3/00-3/02 B66B 5/00-5/28 H02P 3/00-3 / 26

Claims (5)

(57) [Claims] 1. An inverter circuit for controlling an electric motor for driving an elevator, a regenerative circuit having a regenerative resistor for absorbing regenerative energy generated in a regenerative mode, and a brake circuit including a semiconductor element for absorbing the regenerative energy. A main control unit that receives a power supply from a main power supply to perform a normal operation of the elevator; and an emergency power supply, and switches the emergency power supply to the main control device when the main power supply fails, and connects and disconnects the elevator. And a power failure rescue operation device for performing rescue operation, the resistance value of the regenerative resistance during the power failure rescue operation of the elevator by the emergency power supply, during normal operation of the elevator by the main power supply. A regenerative resistor switching system that performs switching control of the regenerative resistor so that the regenerative resistor has a lower resistance than the regenerative resistor. Elevator control apparatus characterized in that it comprises a means. 2. The regenerative resistor is configured by connecting a plurality of resistors in series, the regenerative resistor switching control means includes: a relay that operates during a power outage rescue operation of the elevator using the emergency power supply; 2. The elevator control device according to claim 1, wherein the switch is configured to include a change-over switch that short-circuits a part of the resistor constituting the regenerative resistor by operation. 3. The regenerative resistor is configured so that a plurality of resistors can be connected in parallel. The regenerative resistor switching control means includes: a relay that operates during a power failure rescue operation of the elevator using the emergency power supply; 2. The elevator control device according to claim 1, wherein the elevator control device comprises a changeover switch for turning on a part of the resistor constituting the regenerative resistor by an operation. 4. An inverter circuit for controlling an electric motor for driving an elevator, a first regenerative resistor for absorbing regenerative energy generated in a regenerative mode, and a first brake circuit including a semiconductor element for absorbing the regenerative energy. A main control device for performing normal operation of the elevator by receiving power supply from a main power supply, and an emergency power supply, wherein the main control device controls the emergency power supply when the main power supply fails. An elevator control device comprising: a power failure rescue operation device that performs a rescue operation during a power failure of an elevator by switching to a device, having a resistance value lower than a resistance value of the first regenerative resistor;
A second regenerative circuit having a second regenerative resistor for absorbing regenerative energy generated by the regenerative mode, and a second brake circuit including a semiconductor element for absorbing the regenerative energy; and normal operation of the elevator by the main power supply Sometimes the first
The regenerative circuit, and the second regenerative circuit at the time of emergency power outage rescue operation of the elevator by the emergency power supply,
An elevator control device comprising regenerative circuit switching control means for performing regenerative circuit switching control. 5. The regenerative circuit switching control means includes: a relay that operates during rescue operation of the elevator using the emergency power supply during a power failure; and an operation of the first regenerative circuit and an operation of the relay when the relay does not operate. 5. The elevator control device according to claim 4, wherein a switch for switching a regenerative circuit is provided on the side of the second regenerative circuit.