JPH0534273B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an elevator control device equipped with various controllers for controlling the operation of an elevator.

[Technical background of the invention and its problems]

Generally, an elevator control device includes a sequence controller that performs sequence control, a main circuit controller that controls the motor of the hoisting machine, and a speed controller that provides control commands to the main circuit controller.

First, the single-line circuit diagram of the main circuit controller in an AC elevator used as a standard type elevator will be briefly explained with reference to Figure 1.
A thyristor stack 2 that uses a VVVF (variable voltage/variable frequency) inverter system to obtain DC power supplies P and N from three-phase AC power supplies R, S, and T supplied from a three-phase AC commercial power supply 1 on the building side, and its DC power supply. Power supply P, N
A GTR (giant transistor) stack 4 obtains a variable voltage variable frequency three-phase AC power supply R1, S1, T1 for the AC motor 3 of the hoisting machine from the main circuit, and a main circuit smoothing capacitor 5 connected to the DC power supplies P and N.
, a PB (power back) transistor 6 and a PB resistor 7 used during regeneration,
The AC motor 3 of the hoisting machine is controlled.

Although not shown, the sequence controller mainly uses a microcomputer to perform sequence control for executing various sequences, such as call registration and direction selection.

Furthermore, the speed controller outputs a switching signal to the GTR stack 4 of the main circuit shown in FIG. 1 of the main circuit controller described above to give a control command.

An elevator configured to control the drive system with such an elevator control device is described with reference to FIG. 2.The upper machine room 8 of the elevator hoistway of the building
A hoisting machine 9 having the AC motor 3 is installed in the hoisting machine 9, and the rope 1 is wound around the hoisting sheave 10 of the hoisting machine 9.
1 is hung on the hoistway, a car 12 is suspended from one end of the rope 11, and a counterweight 13 is suspended from the other end. A control panel 14 is installed in the machine room 8, and the control panel 14 has the above-mentioned A sequence controller 15, a speed controller 16, and a main circuit controller 17 are installed, and necessary wiring is connected to the control panel 14 via the floor 18 of the machine room 8.

By the way, in the above-mentioned elevator control device, since the DC power supplies P and N of the main circuit of the main circuit controller 17 provided in the control panel 14 are forcibly switched by the GTR stack 4, the hoisting machine A large switching noise occurs in the three-phase AC power supplies R1, S1, and T1 that are supplied to the AC motor 3. Moreover, because the sequence controller 15 using a microcomputer is built into the same control panel 14 in order to respond to the recent diversification of specifications, the sequence controller 15 tends to malfunction due to the above-mentioned large noise, which sometimes occurs in elevators. There was a problem in which the train suddenly stopped and passengers were trapped in the car 12 on the middle floor, leading to an accident. In addition, since the control panel 14 is wired with input/output signal lines from the elevator hall and the car 12, each wiring duct is separated in order to prevent the switching noise from being induced in those signal lines. The necessity arises, and the number of wiring ducts increases accordingly, leading to an increase in the size and cost of the device. Furthermore, it has a large capacity. Adjustment of microcomputer peripheral equipment that normally uses 50V or less because the high voltage main circuit line is inside the control panel 14. Even when placed during inspection, it was extremely dangerous and required extreme caution.

[Purpose of the invention]

This invention was made in view of the above circumstances, and its purpose is to
It is possible to prevent adverse effects on the sequence controller and various signal wiring due to switching noise generated from the high-voltage main circuit, and even though the main circuit controller is buried in the floor of the machine room, the main circuit control This allows for sufficient ventilation cooling of the equipment without using cooling fans, etc., which enables safe and reliable elevator control at all times, as well as effective use of the machine room space above the hoistway and the installation of sequence controllers, etc. To provide an elevator controller that can simplify the structure and various wiring structures, reduce equipment costs, etc., and also allow operations such as adjustment and inspection of peripheral equipment to be performed easily and safely. be.

[Summary of the invention]

In order to achieve the above object, the elevator control device of the present invention includes a sequence controller that performs sequence control, a main circuit controller that controls the electric motor of the hoisting machine, and a speed at which control commands are given to the main circuit controller. In an elevator control device comprising a controller, a control box having ventilation holes for ventilation cooling opened on the upper and lower surfaces of the floor is buried in the floor near the hoisting machine of the machine room above the elevator hoistway. , the control box is characterized in that the main circuit controller is installed separately from at least the sequence controller.

With this configuration, the main circuit controller is separated from the sequence controller and placed in a shielded control box buried in the floor near the hoisting machine in the machine room above the elevator hoistway. There is no need to worry about switching noise generated from the large-capacity, high-voltage main circuit of the main circuit controller having an adverse effect on the wiring of the sequence controller and various signal lines, leading to malfunctions. Moreover, the main circuit controller is housed in a control box with ventilation holes opening on the top and bottom sides for ventilation and cooling, and is buried in the floor of the machine room above the hoistway. Air flows into the control box due to the wind generated by the vehicle's rise and fall, so even though the main circuit controller is buried in the floor of the machine room, ventilation cooling is not possible without using a cooling fan or the like. This makes it possible to maintain safe and reliable elevator control at all times, and to make effective use of the machine room space above the hoistway.

In addition, as mentioned above, it is possible to install a sequence controller and perform various types of wiring without considering the effects of switching noise of the main circuit controller, which simplifies the installation structure of these controllers and the structure of various wiring ducts. This makes it possible to reduce equipment costs, etc., and also allows operations such as adjustment and inspection of peripheral equipment to be performed easily and safely without paying attention to large-capacity, high-voltage main circuit lines.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to FIGS. 3 and 4. Components in the figure that have the same configuration as those in FIG. 2 are given the same reference numerals to simplify the explanation. Here, the main circuit controller 17 of the elevator control device is separately housed in the main circuit control box 19, separated from the other sequence controller 15 and speed controller 16, and the box 1
9 is installed inside the floor section 18 of the machine room 8 above the hoistway near the hoisting machine 9. On the other hand, the sequence controller 15 and the speed controller 16 are installed in a control panel 14A that is smaller than the main circuit controller 17 and installed in the machine room 8,
Naturally, the main circuit line is not wired to the control panel 14A.

As shown in FIG. 4, the main circuit control box 19 has an inspection lid 20 on its top surface that can be opened and closed, and ventilation holes 21 and 22 for cooling are formed on its top and bottom surfaces. Dust filters 23 are provided in the holes 21 and 22, respectively, to prevent dust caused by ventilation from adhering to the parts of the internal main circuit controller 17.

In the elevator control device configured as described above, the main circuit controller 17 is placed on the floor 18 near the hoisting machine 9 separately from other controllers.
Since the three-phase AC power supply R1, S1, and T1, which is output from the main circuit and has a lot of switching noise, is input to the AC motor 3 of the hoisting machine 9 without coming close to other wiring, other controllers, especially The influence of the noise on the microcomputer of the sequence controller 15 and the input/output lines between it and the hall and the car 12 is eliminated, making it possible to perform sequence control without malfunction.
This eliminates the need for measures such as separating wiring ducts, simplifies the configuration, and at the same time
This makes it possible to downsize A and make effective use of the internal space of the machine room 8.

In addition, since the main circuit controller 17 that uses high voltage is placed separately from the control panel 14A as described above, maintenance of the sequence controller 15, etc. in the control panel 14A is easy. Inspection work becomes safer.

Furthermore, since the main circuit controller 17 uses a semiconductor, it needs to be cooled to prevent the temperature from rising due to heat generation.For this purpose, it is common practice to install a ventilation fan (not shown) to perform forced air cooling. However, as mentioned above, the main circuit controller 17 was placed in a box 19 provided with ventilation holes 21 and 22 with dust filters 23 on the upper and lower surfaces, and installed on the floor 18 of the machine room 8 above the hoistway. When the elevator is operating, the car 12 is raised and lowered by the traveling wind, causing the box 1 to
9 is air-cooled, and the main circuit controller 17 can be naturally cooled without using a conventional ventilation fan.

5 and 6 show other embodiments of the present invention. First, in the embodiment of FIG. 5, the main circuit controller 17 and the speed controller 16 are separated from the sequence controller 15. In this case, a box 19A that can house both the main circuit controller 17 and the speed controller 16 is used, and the sequence controller 15 is installed on the floor 18 of the upper machine room 8 of the hoistway. is installed in the machine room 8 using a small control panel 14B that can incorporate only it.

As a result, the main circuit controller 17 and the speed controller 16, which have many circuit connections, are housed in one box 19A.
The number of external input/output lines connected to the machine room 8 can be reduced, making construction easier, and the space within the machine room 8 can be further expanded.

In addition, in the embodiment shown in FIG. 6, the floor part 1 is
Main circuit controller 17 and speed controller 1 in box 19A of 8
6, the control panel 14B, which has only the sequence controller 15, is installed on the inner surface of the side wall 8a of the machine room 8, thereby eliminating the need for space for installing the control panel on the top surface of the floor 18 of the machine room 8. Therefore, the required area of the entire machine room 8 can be reduced, and the control panel 1 can be
Installation of the 4B is easier than installing it on the floor. In particular, the sequence controller 15, which is mainly composed of a microcomputer, has been made smaller and lighter because it has very few external input/output lines because the input/output with the outside is mainly serial transmission due to advances in transmission technology. side wall 8a
Not only can it be easily attached to the machine room 8, but also the amount of space in the machine room 8 can be further increased.

〔Effect of the invention〕

Since the elevator control device of the present invention is configured as described above, the main circuit controller can be separated from the sequence controller and buried in a shielded state in the floor near the hoisting machine in the machine room above the elevator hoistway. This prevents the switching noise generated from the large-capacity, high-voltage main circuit of the main circuit controller from having an adverse effect on the sequence controller and various signal wiring, and moreover, the main circuit controller is buried in the floor of the machine room. Nevertheless, ventilation cooling of the main circuit controller can be achieved sufficiently effectively without using cooling fans, etc., and safe and reliable elevator control is always possible.
The space in the machine room above the hoistway can be used effectively, the installation structure for sequence controllers, etc., and various wiring structures can be simplified, reducing equipment costs, etc., and further reducing work such as adjusting and inspecting peripheral equipment. can be done easily and safely.

[Brief explanation of the drawing]

Fig. 1 is a general circuit diagram of a main circuit controller of an elevator control device, Fig. 2 is a schematic configuration diagram of a conventional elevator control device, and Fig. 3 is equivalent to Fig. 2 showing an embodiment of the present invention. 4 are enlarged sectional views of essential parts of FIG. 3, and FIGS. 5 and 6 are views corresponding to FIG. 3 showing other different embodiments of the present invention. 1... Three-phase AC power supply, 2... Thyristor stack, 3... AC motor, 4... GTR stack,
5...Smoothing capacitor, 6...PB transistor,
7...PB resistance, 8...Machine room, 8a...Machine room side wall, 9...Hoisting machine, 10...Hoisting sheave, 11
... Rope, 12 ... Car, 13 ... Counterweight, 14, 14A, 14B ... Control panel, 15
...Sequence controller, 16...Speed controller, 1
7... Main circuit controller, 18... Machine room floor, 1
9, 19A... Main circuit control box, 20... Inspection lid, 21, 22... Ventilation hole, 23... Dust filter.

Claims (1)

[Claims] 1. A sequence controller that performs sequence control;
In an elevator control device comprising a main circuit controller that controls the electric motor of the hoisting machine and a speed controller that gives control commands to the main circuit controller, the On the floor,
A control box with ventilation holes for ventilation cooling opened on the upper and lower surfaces of the floor is buried, and the main circuit controller is installed within this control box separately from at least the sequence controller. Characteristic elevator control device. 2. The elevator control device according to claim 1, wherein the main circuit controller is embedded together with the speed controller in the floor of the machine room above the elevator hoistway via a control box. 3. The elevator control device according to claim 1, wherein the sequence controller is installed on a side wall of the machine room above the elevator hoistway, separately from the main circuit controller and the speed controller.