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A torque control method for switched reluctance motor based on low-cost position sensor

A technology of switched reluctance motor and torque control, applied in motor generator control, electronic commutation motor control, control system, etc., can solve the problems of high complexity and high cost of parameter measurement, reduce implementation cost and reduce measurement time, the effect of reducing measurement complexity

Active Publication Date: 2020-11-20
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] Aiming at the defects of high cost of direct instantaneous torque control and high complexity of parameter measurement, the present invention proposes a torque control method for switched reluctance motors based on a low-cost position sensor, which uses the pulse signal of the position sensor to obtain the rotor position, and Dynamically measure the flux linkage data, and then calculate the torque characteristics for direct instantaneous torque control

Method used

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  • A torque control method for switched reluctance motor based on low-cost position sensor
  • A torque control method for switched reluctance motor based on low-cost position sensor
  • A torque control method for switched reluctance motor based on low-cost position sensor

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Embodiment Construction

[0029] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific examples. The motor used in the example is a 1kW three-phase 12 / 8-pole switched reluctance motor.

[0030] Step 1: Install photoelectric position sensors every 30° such as figure 1 , the sensor output signal is divided into six intervals every 45°, and the output signal diagram is as follows figure 2 .

[0031] In the range from 0° to 7.5°, sensor 1 outputs a low level, sensor 2 outputs a high level, and sensor 3 outputs a low level;

[0032] Within the range of 7.5° to 15°, sensor 1 outputs a high level, sensor 2 outputs a high level, and sensor 3 outputs a low level;

[0033] In the range of 15° to 22.5°, sensor 1 outputs a high level, sensor 2 outputs a low level, and sensor 3 outputs a low level;

[0034] In the range from 22.5° to 30°, sensor 1 outputs a high level, sensor 2 outputs a low level, and sensor 3 outputs a high...

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Abstract

The invention discloses a low-cost position sensor-based switched reluctance motor torque control method. According to the method, the rotor speed and position information of a switched reluctance motor are estimated through the signals of a low-cost position sensor; flux linkage characteristic curves at special rotor positions are dynamically obtained through voltages, current and position signals; and therefore, and complete flux linkage characteristics can be obtained through analytical calculation; and torque characteristics are obtained through the complete flux linkage characteristics, so that direct instantaneous torque control can be carried out. With the control method adopted, torque ripples can be reduced, system cost can be effectively reduced, characteristic measurement time can be shortened, and measurement complexity can be reduced.

Description

technical field [0001] The invention relates to a torque control method of a switched reluctance motor based on a low-cost position sensor, and belongs to the field of motor control. Background technique [0002] The switched reluctance motor has a simple structure, the rotor has no permanent magnets and windings, and the torque is generated by the change of the air gap reluctance between the stator and the rotor. The advantages of wide speed range, high reliability, and suitable for harsh environments make it have broad application prospects. However, due to the doubly salient structure and the saturation of the magnetic circuit, the switched reluctance motor has large torque ripple, obvious vibration and noise, making it difficult to apply in many industrial fields. The current methods to solve the torque ripple problem are mainly divided into two aspects: design and control. [0003] The direct instantaneous torque control method uses the instantaneous torque as a feedb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/30
CPCH02P21/30
Inventor 宋受俊方高亮李伊惠
Owner NORTHWESTERN POLYTECHNICAL UNIV
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