JPH0761831B2 - How to operate a low press linear motor elevator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for operating a low-pressure niria motor elevator, and more particularly to an improvement in a method for utilizing regenerative electric power generated when a car descends.

<< Prior Art >> Generally, as shown in FIG. 4, a traction elevator is provided with a drive unit 3 including a hoisting motor and a sheave, etc. in a machine room 2 above an elevator shaft 1, and the drive unit 3 The counterweight 5 and the car 6 are configured to move up and down in the elevator shaft 1 via the sheave and the rope.

Further, in recent years, an elevator using a linear motor as a drive source has been attracting attention as a drive unit for the motor.

For example, as shown in FIG. 5, a primary winding 11 of a linear motor that generates a moving magnetic field in the vertical direction by applying a multi-phase AC power source is provided on a side wall of the elevator shaft 1 and a secondary conductor 12 as a counterweight. Provide close to each other. On the other hand, the car 6 is balanced with the secondary conductor 12 and guided by the rope 4 to the sheave 14 with the brake 13 provided in the machine room 2 above the elevator shaft 1. And the primary winding 11
A moving magnetic field is generated in the car and the secondary conductor 12 is moved up and down to move the car 6 up and down in the elevator shaft 1 (see Japanese Patent Publication No. 47-46094).

Further, in order to omit the machine room 2 in FIG. 5, as shown in the plan view of FIG. 6 (A) and the sectional view of FIG. 6 (B),
It is also proposed that the primary winding 11 is attached to the side surface of the car 6 and the secondary conductor 12 is provided on the side wall of the elevator shaft 1 (see Japanese Utility Model Publication No. 62-136476).

Here, in the case of FIGS. 6A and 6B, since the primary winding 11 installed on the side surface of the car 6 moves up and down along the secondary conductor 12 on the side wall of the elevator shaft 1, the car 6 is lifted. Move up and down in the shaft 1.

<< Problems to be Solved by the Invention >> By the way, in the low press linear motor elevator shown in FIG. 6, a large amount of energy is required when the car 6 is lifted.

On the other hand, the low press linear motor elevator generates a large amount of electric energy when the car 6 descends, because the linear motor acts as a generator (see Examples described later).

However, the technique of effectively utilizing this large amount of electric energy does not exist in the conventional linear motor elevator, and requires a very large power supply facility.
Further, this electric energy is returned to the power source, and the quality of the power source in the customer (distortion of power waveform, voltage fluctuation, generation of reverse power transmission) is also deteriorated.

As described above, in the case of the conventional linear motor elevator, although a large amount of electric energy is required when the car 6 is raised, a large amount of electric energy is not effectively used when the car 6 is lowered, The method of using energy as a whole is extremely poor, and it cannot be said to be a practical lifting means. Especially in the case of a high-rise building or a huge building with a large amount of vertical movement, the tendency is remarkable.

The present invention has been made in view of the above points, and its purpose is to provide electric power in an elevator group without returning a large amount of electric energy generated when a car is lowered by a linear motor to a power source. It is an object of the present invention to provide a method of operating a low press linear motor elevator, in which the energy transfer is performed and the method of using energy is improved.

<< Means for Solving the Problem >> In order to achieve the above object, in the method for operating a low press linear motor elevator according to the first aspect of the present invention, at least a pair of low press niria motor elevators is used to raise and lower an elevator car. The descent of the car of the other elevator is synchronized, and the electric power generated when the car descends is used as the electric power required when the car rises.

In the method for operating the low press linear motor elevator according to the second aspect of the present invention, the electric power generated when the car descends is stored in the electric power storage device, and the stored electric power is used as the electric power required when the car ascends.

<< Operation >> In the first invention, in the pair of low-press linear motor elevators in which the ascending and descending are synchronized, the regenerative power obtained when the car descends is consumed as it is as the car ascending power. Such a system is particularly effective for a low-press linear elevator that operates a shuttle in a skyscraper or the like.

In the second aspect of the invention, in a plurality of low-press linear motor elevators that are randomly moved up and down without ascending and descending being synchronized, regenerative power obtained when the car is descending is stored in the power storage device. Such a system is particularly effective for general low-press linear elevators operating on multiple floors.

Then, the stored electric power is taken out and used as the electric power required by the elevator that is operated to rise at an appropriate time.

As described above, in the first and second inventions, a large amount of electric energy obtained during the descending operation of the elevator is recovered, and this electric energy is applied to the large amount of electric energy required during the ascending operation of the elevator to use the energy. Optimize the method.

<< Practical Example >> FIG. 1 shows an embodiment of a driving method according to the first invention.

In the figure, one car 6, 6'is arranged in each of the pair of elevator shafts 1, 1 ', and the primary winding (not shown) of the low press linear motor is the elevator shaft.
It is provided on the wall surface of 1,1 ', and the secondary conductor (not shown) is provided on the side surface of each car 6,6'.

In the figure, l, m, n, and o indicate respective floors of the building, and there are stop portions (hatched portions in the figure) of the cars 6 and 6'on the floors of the floors l to o.

The cars 6 and 6'are synchronized, and the car 6 is in the descending state and the car 6'is in the ascending state.

The regenerative electric power obtained when the car 6 descends drives the car 6'through a power system (not shown).

FIG. 2 shows an embodiment of the driving method according to the second invention, in which the same reference numerals as in FIG. 1 designate the same parts as in FIG.

This example shows a case where the operating method according to the second aspect of the invention is applied to a linear motor elevator in which a plurality of cars 6 are arranged in the elevator shaft so as to be able to move in a circulating manner.

In the figure, two elevator shafts 1 and 1'are communicated with each other by vertically-arranged vertically communicating portions 10a and 10b, and a plurality of (in this example, 12 ) The cage 6 of the platform is arranged.

The primary windings (not shown) of the linear motor elevator are provided on the wall surfaces of the elevator shafts 1, 1'and the floor surfaces of the upper and lower communication parts 10a, 10b, and the secondary conductors (not shown) are provided on the side surface and the bottom surface of each car 6. It is provided.

In the figure, the solid line arrow indicates the upward movement direction of the car 6, and the alternate long and short dash line arrow indicates the power system. Electric power generated while the car 6 is descending is stored in a power storage system (for example, a battery,
Superconducting power storage system, etc.) 13.

On the other hand, this stored electric power is taken out as electric power required for raising the car 6 and is used for raising the car 6.

If the amount of regenerative power generated is less than the amount of power required to raise the car (there is often less regenerative power due to various losses, etc.) Supply power.

Next, a calculation example for demonstrating the effects of the first and second inventions will be shown.

Figure 3 shows the triple deck used in this calculation example (total 30
An example of a low press linear motor elevator for 0 passengers is shown.

In the figure, 11 is a primary winding of a low press linear motor provided on both side walls of the elevator shaft 1, and 12 is a secondary conductor provided on both sides of the triple deck car 6 (in this example, one side is There are 10 on each side, 20 in total).

In the figure, the loading weight of the car 6 of the triple deck is 25
If the total weight (including the propelling body) of the 000 kg and the triple deck car 6 is 25,000 kg, the maximum weight is 50,000 kg.

If the rated operating speed of the car 6 is 300 m / min. And the acceleration is 0.1 g, the propulsive force at the time of required acceleration is 50000 × 0.1 + 50000 = 55000 kg.
・ G.

Therefore, the power-related specifications of this system are roughly as follows.

Rated output of linear motor: 55t x 9.8m / s ² x 300 (m / min) ÷ 60 (sec / min) ≈ 2700kW Rated input power of linear motor: 2750kW / 0.85 ≈ 3180kW Regenerative power of linear motor: 2700kW / 0.85 ≒ 2300kW Power supply capacity per unit without regenerative power: 3180kW / 0.9 ≒ 3530kWA Efficiency of the charger of the second invention: 0.93 In the first and second inventions, part or all of the rated input power (3180kW) In addition, the regenerative power obtained when the car 6 descends is used.

This regenerated power is approximately 2300 kW, as described above,
It is possible to operate with power supply equipment of about 28% of the above rated input power (3180kW).

Further, in the embodiment of FIG. 2, when operating 10 cars 6 simultaneously in the elevator shafts communicating with each other in the upper and lower parts, the installed capacity of about 35300 KVA is required.

In the second invention, operation can be performed with a power supply capacity of about 30% of this about 35300 kVA.

<< Effects of the Invention >> According to the operating methods of the first and second inventions described in detail above, the electric energy generated when the car descends can be effectively used as the electric power when the car ascends.

As a result, the maximum value of the electric energy to be supplied to all the elevators during the elevator raising / lowering operation can be significantly reduced, and this effect is particularly remarkable in a high-rise building or a huge building that performs a large amount of elevation.

Further, since the regenerated electric power is not returned to the power source, there is no fear of adversely affecting the quality of the power source equipment and the system power source.

Therefore, it can be said that the low press linear motor elevator is put to practical use for the first time in the high-rise building, the huge building, etc. by the operation method according to the first and second inventions.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a driving method according to the first invention, FIG. 2 is an explanatory view showing an embodiment of a driving method according to the second invention, and FIG. 3 is a drawing of the first and second inventions. FIG. 4 is an explanatory diagram showing the effect, FIG. 4 is an explanatory diagram showing a conventional general elevator, and FIGS. 5 and 6 are explanatory diagrams of a conventional linear motor elevator. 1,1 ′ …… Elevator shaft 6,6 ′ …… Cage 10a, 10b …… Upper and lower communication section 11 …… Primary winding of linear motor 12 …… Secondary conductor of linear motor 13 …… Energy storage system

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kanji Sakai 2-3 Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo headquarters (72) Inventor Mitsuru Saito 2-3 Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Kazuo Kashihara 2-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (2)

[Claims] 1. At least one pair of low press linear motor elevators, wherein one elevator raising operation and the other elevator lowering operation are synchronized, and the electric power generated when the car is lowered is used as the electric power required when the car is raised. A method of operating a low-press linear motor elevator characterized by. 2. A low-press linear motor elevator, wherein electric power generated when a car of a low-press linear motor elevator descends is stored in an electric power storage device, and the stored electric power is used as electric power required when the car ascends. Driving method.