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Novel synchronous reluctance motor rotating speed estimation method

A synchronous reluctance motor, speed estimation technology, applied in the control of generators, motor generator control, AC motor control and other directions, can solve the problems of large high frequency loss and high frequency noise, to reduce high frequency loss and high The effect of frequency noise

Active Publication Date: 2021-04-20
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a novel synchronous reluctance motor speed estimation method, which solves the problems of large high-frequency loss and high-frequency noise caused by the constant amplitude injection of the existing high-frequency voltage square wave injection method

Method used

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  • Novel synchronous reluctance motor rotating speed estimation method
  • Novel synchronous reluctance motor rotating speed estimation method
  • Novel synchronous reluctance motor rotating speed estimation method

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Embodiment Construction

[0083] The present invention is a novel synchronous reluctance motor speed estimation method, wherein the block diagram of a novel synchronous reluctance motor speed estimation vector system is as follows figure 1 As shown, the specific steps are as follows:

[0084] Step 1: Establish a lookup table of load torque and synchronous reluctance motor inductance, identify the motor load online through the load torque observer to obtain the inductance, and then fix the high-frequency response current signal-to-noise ratio to derive the required high-frequency signal injection amplitude, and finally inject a high-frequency square wave voltage signal into the estimated rotating coordinate system and extract its corresponding high-frequency response current, specifically:

[0085] Step 1.1: Establish a lookup table of load torque and synchronous reluctance motor inductance;

[0086] The stator voltage equation of synchronous reluctance motor is:

[0087]

[0088] Among them, u d ...

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Abstract

The invention discloses a novel synchronous reluctance motor rotating speed estimation method, which is characterized by specifically comprising the following steps of: 1, establishing a lookup table of load torque and synchronous reluctance motor inductance, and identifying a motor load on line through a load torque observer to obtain inductance, deducing the amplitude of a high-frequency signal needing to be injected by fixing the signal-to-noise ratio of the high-frequency response current, and finally, injecting a high-frequency square wave voltage signal into the estimated rotating coordinate system, and extracting the high-frequency response current corresponding to the signal; 2, performing signal processing on the high-frequency response current obtained in the step 1 to obtain a rotor position error signal; and 3, estimating the rotating speed and the rotor position of the SynRM of the rotor position error signal obtained in the step 2 through a Luenberger observer. According to the invention, the problems of large high-frequency loss and high-frequency noise caused by constant amplitude injection in the existing high-frequency voltage square wave injection method are solved.

Description

technical field [0001] The invention belongs to the technical field of synchronous reluctance motor control, and relates to a novel synchronous reluctance motor speed estimation method. Background technique [0002] Synchronous Reluctance Motor (SynRM) is regarded as an alternative to permanent magnet synchronous motors and asynchronous motors in water pumps, fans, air compressors, etc. due to its high precision, high power factor, high efficiency, and low cost. The ideal motor for field applications has gradually attracted the attention of experts and scholars from all walks of life. Since the motor is used to drive water pumps and fans, its environment is complex and changeable, and the load on the motor varies greatly, so how to solve the reliability and cost constraints brought to the system by installing sensors in harsh environments; How to improve the starting torque and load capacity of the motor in the control algorithm has become a hot research topic at present. ...

Claims

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Application Information

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IPC IPC(8): H02P21/18H02P21/13H02P6/185H02P25/026H02P27/08
Inventor 尹忠刚常峰鸣张彦平高峰涛
Owner XIAN UNIV OF TECH
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