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Elevator control device

A control device and elevator technology, which is applied in the field of elevator control devices, can solve problems such as rising costs, and achieve the effects of reducing slippage and suppressing car vibration

Active Publication Date: 2019-02-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This method requires a load detection device for detecting the load capacity of the car, and the cost increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039] exist figure 1 In the elevator control device according to Embodiment 1 shown, the pulley 2 is connected to the rotation shaft of the motor 1 . A rope 3 is hung from the pulley 2 , a car 4 is suspended from one end thereof, and a counterweight 5 is suspended from the other end via the rope 3 . A pulse encoder 11 for detecting an angle is provided on the motor 1, and speed control described below is performed based on the angle information. The output of the pulse encoder 11 , that is, a motor angle detection signal is input to the speed calculation unit 12 .

[0040] The speed computing unit 12 has a function of converting the motor angle detection signal into an angular speed signal of the motor 1, and outputs a speed signal ω. The speed signal ω is subtracted from the speed command signal ω_ref, which is the output of the speed command generation unit 13 , by the subtraction unit 14 to obtain the speed error signal ω_err. The speed error signal ω_err is input to th...

Embodiment approach 2

[0094] In the first embodiment described above, the motor drive current signal iq is used as the input signal of the disturbance observer 17, but instead, as Figure 11 As shown, the torque current command signal iq_t* can also be used. According to this structure, since the calculation of the disturbance observer 17 is comprised only by the internal signal of a calculation part, it becomes possible to generate|occur|produce a system more simply.

[0095] The disturbance observer 17 in this case is as Figure 12 like that. Only the input signal of the disturbance observer 17 changes from the motor drive current signal iq to the torque current command signal iq_t*, which is the same as figure 1 and figure 2 The structure is the same as that of Embodiment 1 shown, and the effect is also the same.

[0096] In addition, in the above-mentioned embodiment, the disturbance observer 17 was described and described using an analog system, but it may be configured to perform digitiz...

Embodiment approach 3

[0098] In this embodiment, by limiting the end timing of the speed feedback control, it is possible to further realize high-performance and stable operation.

[0099] That is, in figure 1 In this method, the detection information of the pulse encoder 11 that detects the rotation angle of the motor 1 is input to the speed calculation unit 12 to obtain the speed of the motor 1 . This pulse encoder 11 outputs and detects a waveform of one pulse every time the rotation angle of the motor 1 reaches a predetermined value. In this structure, when the rotation speed of the motor 1 is slow, that is, when the change of the rotation angle is slow, the pulse detection period of the pulse encoder 11 is long. Therefore, since the detection update period of the motor angle detection signal which is the input signal of the speed calculation unit 12 is long, a detection time delay occurs in the speed signal ω which is the output of the speed calculation unit 12 .

[0100] Furthermore, when t...

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PUM

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Abstract

Provided is an elevator control device with which unbalance torque after brake release can be estimated in a short amount of time and corrected, whereby startup shock and car rollback can be stabilized and reduced. The present invention is provided with: a switching unit for estimating unbalance torque, which is the weight difference between a car and a balancing weight, using an unbalance torqueestimator on the basis of motor drive current or a motor torque current command signal, and a motor speed detection signal, the switching unit selecting whether to output, as a torque offset current command signal, a signal obtained by adding the estimated unbalance torque and a value proportional to the speed signal, or to output, as the torque offset current command signal, the estimated unbalance torque after the brake for braking the rotation of the motor is released; and an addition unit for adding, to a torque current command signal which is the input of a current control unit, the torque offset current command signal output from the switching unit.

Description

technical field [0001] The present invention relates to a control device for an elevator, in particular to a control device for an elevator which reduces the starting shock generated when the elevator starts to run. Background technique [0002] Generally, in a rope elevator, a car and a counterweight are suspended by ropes via pulleys connected to a motor. When the car is at rest, the brakes are used to keep it stationary, but when the car starts to travel, the brakes are released, and the pulleys are rotated by the motor, thereby lifting and lowering. [0003] At this time, as the brake is released, the unbalanced torque of the weight difference between the car and the counterweight is transmitted to the motor via the pulley. From the perspective of motor speed control, the unbalanced torque acts as a step-like disturbance, so when the brake is released with the motor torque being zero, the motor (pulley) is affected by this step-like disturbance , resulting in car accel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/30H02P23/12H02P29/40
CPCB66B1/30H02P23/12H02P29/40
Inventor 横山英二大塚康司
Owner MITSUBISHI ELECTRIC CORP