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Switched reluctance motor sensorless control method based on linear inductance conversion method

A technology of switched reluctance motor and control method, which is applied in the direction of motor control, AC motor control, control system, etc., and achieves the effect of simple and easy method, high estimation accuracy and less measurement work

Active Publication Date: 2021-08-10
SHAANXI AVIATION ELECTRICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the saturation of the magnetic circuit of the switched reluctance motor, the nonlinearity of its electromagnetic characteristics brings challenges to the nonlinear control of medium and high speeds.

Method used

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  • Switched reluctance motor sensorless control method based on linear inductance conversion method
  • Switched reluctance motor sensorless control method based on linear inductance conversion method
  • Switched reluctance motor sensorless control method based on linear inductance conversion method

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0030] The motor used in this embodiment is a 1kW three-phase 12 / 8-pole switched reluctance motor.

[0031] Step 1: Obtain the characteristics of the inductance of the switched reluctance motor changing with current at four special positions through the torque balance method, including the unsaturated inductance L un (θ 1 ), L un (θ 2 ), L un (θ hr ), L un (θ a ), and the phase voltage and phase current of the switched reluctance motor are measured by current sensors and voltage sensors; where θ 1 Indicates the rotor position when the leading edge of the stator of the switched reluctance motor coincides with the trailing edge of the rotor, θ 2 Indicates the rotor position when the leading edge of the stator of the switched reluctance motor coincides wi...

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Abstract

The invention discloses a switched reluctance motor sensorless control method based on a linear inductance characteristic conversion method. Due to the influence of magnetic field saturation, the method obtains the inductance characteristics of the switched reluctance motor at four special positions through a torque balance method, builds the relation between unsaturated inductance and current in a linear interval according to the unsaturated inductance characteristics of the motor, obtains real-time phase inductance through measurement and calculation in the operation process of the motor, obtains the real-time phase inductance of the switched reluctance motor through a provided conversion model, converts the real-time phase inductance into unsaturated inductance, and finally calculates the corresponding motor rotor position information according to the linear relation between the unsaturated inductance and the rotor position. According to the invention, the effectiveness of the method is verified through experiments, and the method is simple, convenient and easy to implement, little in measurement work, high in rotor position information estimation precision and suitable for medium and high speed application occasions.

Description

technical field [0001] The invention relates to a position sensorless control method of a switched reluctance motor based on a linear inductance conversion method, belonging to the field of motor control. Background technique [0002] With the rapid development of more all-electric aircraft, there is an urgent need for high-reliability and high-power-density starter power generation systems for aeronautical aircraft. Switched reluctance motors have the advantages of simple structure, no permanent magnets, wide speed range and strong fault tolerance, and have certain advantages in the application of aircraft starter power generation. The high-performance control of switched reluctance starter generators is inseparable from accurate position information. However, mechanical sensors have a high failure rate in high-temperature applications of multi-electric aircraft, and it is difficult to meet the reliability requirements of electric drive control equipment. The failure of th...

Claims

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Application Information

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IPC IPC(8): H02P25/08H02P23/14
CPCH02P25/08H02P23/14H02P2203/01
Inventor 葛乐飞钟继析鲍崇宋受俊蒙海鹰
Owner SHAANXI AVIATION ELECTRICAL
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