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Power compensation-based sensorless control system and method for synchronous reluctance motor

A technology of synchronous reluctance motor and power compensation, which is applied in the direction of control system, motor control, vector control system, etc., and can solve problems such as limitation and large noise

Inactive Publication Date: 2018-04-17
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the injected current is large, there is a large noise during the startup process, which will be limited in practical application

Method used

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  • Power compensation-based sensorless control system and method for synchronous reluctance motor
  • Power compensation-based sensorless control system and method for synchronous reluctance motor
  • Power compensation-based sensorless control system and method for synchronous reluctance motor

Examples

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Embodiment 1

[0070] Embodiment 1. A sensorless control system for synchronous reluctance motors based on power compensation, such as figure 1 As shown in -4, it includes the first subtractor 1, the constant voltage frequency ratio V / F module 2, the stator voltage space vector given angle θ module 3, the second subtractor 4, and the voltage amplitude compensation module based on reactive power calculation 5. Angle compensation module 6 based on active power calculation, sector calculation module 7, SVPWM modulation module 8, Clarke transformation module 9, rectification / three-phase inverter module 10 and synchronous reluctance motor 11.

[0071] The signal connection relationship of the present invention is as follows:

[0072] Synchronous reluctance motor 11 outputs two-phase actual current i a i b to Clarke transform module 9;

[0073] Clarke transformation module 9 according to the input two-phase actual current i a i b , the current component i in the static two-phase coordinate sy...

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Abstract

The invention provides a power compensation-based sensorless control system for a synchronous reluctance motor. The power compensation-based sensorless control system comprises a first subtractor, a constant voltage-frequency ratio V / F module, a given stator voltage space vector angle theta module, a second subtractor, a reactive power calculation-based voltage amplitude compensation module, an active power calculation-based angle compensation module, a sector calculation module, an SVPWM modulation module, a Clarke transformation module, a rectifier / three-phase inverter module and the synchronous reluctance motor. The invention further provides a power compensation-based sensorless control method for the synchronous reluctance motor; the reactive power calculation-based voltage amplitudecompensation module can output a compensation value of a stator voltage vector amplitude; and the active power calculation-based angle compensation module can output the compensation value of a givenspeed. The output capacity of the synchronous reluctance motor can be improved by adopting a method of outputting a voltage difference value and the compensation value of the given speed as new statorvoltage vector amplitude and given stator voltage space vector angle separately.

Description

technical field [0001] The invention relates to a control device for a synchronous reluctance motor, in particular to a sensorless control system and method for a synchronous reluctance motor based on power compensation. Background technique [0002] Because of its series of advantages (such as lower cost, efficiency between asynchronous motor and permanent magnet synchronous motor, etc.), synchronous reluctance motor has become a substitute for asynchronous motor and permanent magnet synchronous motor in water pumps, fans and air compressors. It is an ideal choice for applications in fields such as motors, and finding a method suitable for sensorless control of synchronous reluctance motors has become a feature of current research. [0003] At present, scholars at home and abroad have conducted some research on this, such as Document 1 (Patent No.: 201710465148.6) describes a synchronous reluctance motor field weakening control system based on direct torque control, and des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/28H02P25/089H02P27/08
CPCH02P21/28H02P25/089H02P27/08H02P2207/05
Inventor 鲁文其吴迪周延锁钱杰纪科辉王秀锋
Owner ZHEJIANG SCI-TECH UNIV
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