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Motor control apparatus of elevator

A control device and motor technology, applied in elevators, lifts, transportation and packaging in buildings, etc., which can solve the problems of time-consuming and labor-intensive, unclear constants, etc.

Active Publication Date: 2008-11-12
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when reusing old induction motors such as refurbishing equipment, these constants are often unclear
Therefore, in order to set the terminal voltage and current of the motor to predetermined values, the operator must adjust the mutual inductance coefficient and the value of the secondary time constant used inside the control device through trial and error, and this adjustment operation takes a lot of time and manpower.

Method used

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  • Motor control apparatus of elevator
  • Motor control apparatus of elevator
  • Motor control apparatus of elevator

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0036] figure 1 It is a diagram showing the system configuration of the motor control device using the vector control method according to the first embodiment of the present invention.

[0037] In this motor control device, an inverter 2 converts a DC voltage obtained by a DC power supply 1 such as a rectifier into AC power with a variable frequency and a variable voltage to drive an induction motor 3 . Such as figure 2 As shown, the hoisting machine 21 of the motor is directly connected to the induction motor 3 . When the induction motor 3 is driven, the winch 21 rotates with it, and the car 23 and counterweight 24 of the elevator go up and down in the hoistway like a bucket through the steel cable 22 wound on the winch 21 .

[0038] When the induction motor 3 is driven, the rotational speed of the induction motor 3 is detected by the speed sensor 4 . The rotational speed of the induction motor 3 detected by the speed sensor 4 is input to a speed controller 6 composed of ...

no. 2 approach

[0071] Next, a second embodiment of the present invention will be described.

[0072] The composition of the second embodiment and figure 1 The same, only the role of the control constant automatic adjustment unit 18 is different. That is, in the first embodiment, it is necessary to adjust the weight to achieve the BL state, and the operator performs this adjustment. On the other hand, in the second embodiment, the control constant automatic adjustment unit 18 is configured to automatically calculate the weight for setting the BL state, and to instruct the operator.

[0073] Specifically, the elevator is operated with a temporary vector control constant in an unloaded state (no load state), and the average power consumption P in the constant-speed operation section is obtained by the control constant automatic adjustment unit 18. AVE . In addition, hereinafter, the state in which the car 23 is empty is simply referred to as an NL (No Load) state.

[0074] Average power con...

no. 3 approach

[0099] Next, a third embodiment of the present invention will be described.

[0100] The configuration in the second embodiment mode, and figure 1 They are the same, but the function of the control constant automatic adjustment unit 18 is different. That is, in the first embodiment, when updating the value of the secondary time constant reciprocal setter 14 according to the current value in the FL state, the average value of the torque component current, theoretically speaking, in the up running and down running Runtimes should be equal in absolute value, opposite only in polarity. However, there are cases where the absolute values ​​of both are different due to mechanical friction loss, the weight of the wire rope, and the like.

[0101] Therefore, in the third embodiment, as the torque current average value I qAVE Absolute value, take up run / down run respective I qAVE The average of the absolute values, the polarity is the same as that used for the uplink operation. The...

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PUM

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Abstract

The motor control device of the elevator of the invention does not need the complex adjusting operation by the operator and is able to simply and exactly adjust the terminal voltage and the current of the motor as the preset value. The motor control device of the elevator for driving and controlling the motor (3) by vector control mode is provided with the terminal voltage of the motor (3) , the current and the measured value of the rotary speed obtained under the state of at least two different running state; the vector control constant is automatically adjusted by the preset formula to cause the terminal voltage and the current as the control constant automatically adjusting device (18) of the preset value at the rated load.

Description

technical field [0001] The present invention relates to a motor control device for driving and controlling an induction motor used in an elevator hoist. Background technique [0002] In general, when an induction motor is used for a hoisting machine of an elevator, so-called "differ frequency type vector control" is often performed. In order to obtain good control performance in the difference frequency vector control, values ​​of the mutual inductance coefficient and the secondary time constant are necessary among electric constants of the induction motor (see, for example, Non-Patent Documents 1 and 2). [0003] Here, the mutual inductance is necessary to determine the flux current command and mainly affects the terminal voltage of the motor. In addition, the secondary time constant is necessary to determine the difference frequency command and mainly affects the current of the motor. [0004] Non-Patent Document 1: "Electromechanical Engineering Revised Edition" edited ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/00B66B11/04
Inventor 稻垣克久高崎一彦秋月博光岛根一夫
Owner TOSHIBA ELEVATOR KK
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