Synchronous reluctance motor sensorless direct torque control system based on power compensation

A technology of synchronous reluctance motor and direct torque control, which is applied in the control system, vector control system, motor generator control, etc., and can solve the problem of weak load capacity, small starting torque, flux observation amplitude, and phase deviation And other issues

Active Publication Date: 2018-03-30
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document uses a voltage-current observation model for the observation of the stator flux linkage. Since the model uses a pure integral link, a small DC bias will eventually lead to integral saturation, resulting

Method used

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  • Synchronous reluctance motor sensorless direct torque control system based on power compensation
  • Synchronous reluctance motor sensorless direct torque control system based on power compensation
  • Synchronous reluctance motor sensorless direct torque control system based on power compensation

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Embodiment 1

[0071] Embodiment 1, a sensorless direct torque control system for synchronous reluctance motors based on power compensation, such as figure 1 -4, including the first subtractor 1, the first PI module 2, the second subtractor 3, the first adder 4, the torque hysteresis module 5, the third subtractor 6, the switch table module 7, the flux linkage Hysteresis module 8, second adder 9, rectification / inverter module 10, stator voltage vector calculation module 11, stator flux linkage and speed estimation module 12, motor actual torque calculation and angle compensation module 13 based on active power calculation 1. Flux linkage given amplitude compensation module 14 based on reactive power calculation, stator current vector transformation module 15 and synchronous reluctance motor 16;

[0072] The signal connection relationship of the present invention is as follows:

[0073] Synchronous reluctance motor 16 outputs two-phase actual current i a and i b to the stator current vecto...

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PUM

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Abstract

The invention provides a synchronous reluctance motor sensorless direct torque control system based on power compensation. The system comprises a first subtractor, a first PI module, a second subtractor, a first adder, a torque hysteresis module, a third subtractor, a switch table module, a switch table module, a magnetic linkage hysteresis module, a second adder, a rectifier/inverter module, a stator voltage vector calculation module, a stator magnetic linkage and rotating speed estimating module, an actual motor torque calculation and angle compensation module based on active power calculation, a magnetic linkage given amplitude compensation module based on reactive power calculation, a stator current vector transformation module and a synchronous reluctance motor. The power output capacity of the system is improved by the method that a reactive power calculation output value compensates flux linkage stator flux linkage and an active power calculation output value compensates statorflux linkage angles.

Description

technical field [0001] The invention relates to a synchronous reluctance motor control system, in particular to a sensorless direct torque control system of a synchronous reluctance motor based on power compensation. Background technique [0002] In recent years, with the continuous rise of rare earth prices, the manufacturing cost of permanent magnet synchronous motors with magnetic steel in the rotor is also increasing, while the synchronous reluctance motor (SynRM) has lower cost and low efficiency because of its rotor without permanent magnets. Due to the advantages between asynchronous motors and permanent magnet synchronous motors, it has been regarded as an ideal motor to replace permanent magnet synchronous motors and asynchronous motors, and finding a method suitable for sensorless control of synchronous reluctance motors has become a current research topic. specialty. [0003] At present, scholars at home and abroad have carried out some research on this, such as ...

Claims

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Application Information

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IPC IPC(8): H02P21/30H02P25/08
Inventor 鲁文其钱杰王秀锋
Owner ZHEJIANG SCI-TECH UNIV
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