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Control device of induction motor and application thereof

A technology for an induction motor and a control device, applied in the field of the induction motor control device and the energy-saving control device for an induction motor, can solve problems not related to operating conditions, reduce heat dissipation power, save energy, and improve working conditions Effect

Active Publication Date: 2011-03-23
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also it does not address the operation of the motor when it is in regenerative state
Therefore, the existing control method does not solve the problem of light-load energy saving of escalators and moving walks.

Method used

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  • Control device of induction motor and application thereof
  • Control device of induction motor and application thereof
  • Control device of induction motor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] see figure 1 As shown, the energy-saving control device of the induction motor includes:

[0022] The three-phase rectifier bridge stack 3 is connected with the three-phase power supply of the mains to realize AC (alternating current)-DC (direct current) conversion.

[0023] IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) or IPM (Intelligent Power Module, Intelligent Power Module) power module 2 is connected to the three-phase rectifier bridge stack 3 through the DC bus 4 to realize DC-AC conversion. The motor 1 supplies a driving power supply voltage.

[0024] The induction motor 1 is connected with the power module 2 and is used to drive the escalator and / or the moving walk.

[0025] The two current transformers 7 and 8 respectively measure the U-phase and V-phase currents of the induction motor 1, and input them to the driving computing system 6 composed of a microprocessor.

[0026] The encoder 9 is coaxially connected with the inducti...

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PUM

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Abstract

The invention discloses a control device of an induction motor, comprising a tri-phase bridge rectifier, a power module, the induction motor, a current transformer, a coder, a pulse-width modulation (PWM) driver and a driving operating system, wherein the driving operation system adopts a vector control mode and comprises a filter circuit which is connected between a speed loop proportional plus integral (PI) controller and an exciting current instruction operation unit of the driving operation system and is used for filtering the moment current instruction value and inputting the filtered moment current instruction value in the exciting current instruction operation unit; and the exciting current instruction operation unit corrects the exciting current instruction value Ids of the induction motor based on the filtered moment current instruction value to lead the induction motor to have the minimum total current under the same load condition. The invention also discloses an application of the control device of the induction motor. In the invention, on the premise of not weakening the heavy load driving capacity of an escalator and a moving walk, the effect of stable operation of the motor with minimum current under a medium / light load condition is realized, thus achieving energy conservation.

Description

technical field [0001] The invention relates to a drive control system for escalators and automatic sidewalk systems; in particular, it relates to an induction motor energy-saving control device capable of realizing energy saving. The invention also relates to the application of said induction motor control device. Background technique [0002] The operation of escalators and moving walks may be in various states, such as an empty state with no one present, or a fully loaded state. At the same time, when the escalator is going up, the motor overcomes the friction force of the escalator and the potential energy of pedestrians to do work, and is in the electric state; while when the escalator is going down, the potential energy of pedestrians drives the motor to run, so that the motor is in a regenerative state. Therefore, in the induction motor drive system used for escalators and moving walks, the load on the induction motor has a wide range of variation. In general, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14B66B23/02B66B25/00H02P21/00
CPCY02B50/225Y02B50/00
Inventor 黄维纲徐卫玉顾海强倪凯
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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