Output torque depulsation control method for switch reluctance servo motor

A technology of servo motor and switched reluctance, applied in torque ripple control, AC motor control, control system, etc., can solve the problems of difficulty in establishing torque sharing function accurately, unable to meet the current switching rate, affecting the effect of eliminating ripple, etc. Achieve high operational reliability and fault tolerance, wide practicability, and high cost performance

Inactive Publication Date: 2006-04-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is to reduce the output torque ripple by optimizing the phase current waveform of the motor, mainly including: (a) Obtain the expected current waveform by querying the phase current/rotor position curve data under different torques obtained from the actual measurement, and reduce the torque ripple, but It cannot meet the requirement of infinite current switching rate during commutation; (b) use the torque sharing coefficient to obtain the torque of each phase, and obtain the expected current waveform from the motor torque angle characteristics

Method used

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  • Output torque depulsation control method for switch reluctance servo motor
  • Output torque depulsation control method for switch reluctance servo motor
  • Output torque depulsation control method for switch reluctance servo motor

Examples

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Example Embodiment

[0016] Example 1: Take a three-phase 12 / 8 structure switched reluctance servo motor as an example, figure 1 , 2 As shown in, 3 and 4, during the servo operation of rotor 2, when starting, power is supplied to the stator 1 phase winding of the switched reluctance servo motor at the minimum phase inductance position 0° position, and the switching magnetism is stopped at the maximum phase inductance position 22.5° position Resistance servo motor stator 1 phase winding power supply, fixed phase current chopping limit, to chop the phase current of the switched reluctance servo motor; during electric operation, start to switch the switched reluctance servo motor stator 1 at the minimum phase inductance position 0° Phase winding power supply, stop supplying power to the stator 1 phase winding of the switched reluctance servo motor at 17.5° before the maximum phase inductance position, adjust the phase current chopping limit in time, and implement chopping the phase current of the switch...

Example Embodiment

[0017] Embodiment 2: Taking a four-phase 8 / 6 structure switched reluctance servo motor as an example, Figure 5 , 6 , 7 and 8, when the rotor 2 servo is running, when starting, power is supplied to the stator 1 phase winding of the switched reluctance servo motor at the minimum phase inductance position 0°, and the switching magnetism is stopped at the maximum phase inductance position 30°. Resistance servo motor stator 1 phase winding power supply, fixed phase current chopping limit, to chop the phase current of the switched reluctance servo motor; during electric operation, start to switch the switched reluctance servo motor stator 1 at the minimum phase inductance position 0° Phase winding power supply, stop supplying power to the stator 1 phase winding of the switched reluctance servo motor at 23° before the maximum phase inductance position, adjust the phase current chopping limit in time, and chop the phase current of the switched reluctance servo motor; brake deceleration; ...

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Abstract

This invention relates to a method for controlling the output torque pulse-extinction of a switch reluctance servomotor used in different phase numbers and structures. When starting the motor, it begins to supply the motor stator phase winding at the smallest phase inductance position and stops supplying it at the maximum position and fixes the chopper limit of the phase current, when operating, it begins to supply it at the smallest phase inductance position and stops supplying before hand at the maximum phase inductance position to regulate the chopper-limit of the phase current, when reducing the operation, it begins supplying the winding at the maximum position and stops it before hand at the minimum position to fix the chopper limit of the phase current.

Description

1. Technical field [0001] The invention relates to a control method for output torque ripple elimination of a switched reluctance servo motor, and is especially suitable for switched reluctance servo motors with various phase numbers and structures. 2. Background technology [0002] Since the switched reluctance motor adopts a simple and strong rotor structure with no brush, no winding, and no permanent magnet, and the unipolar power converter supplies unidirectional current excitation, the phases on the magnetic circuit can be independent of each other and the phases on the circuit can be independent of each other. Independent of each other, the system has high operational reliability and fault tolerance. Its natural mechanical characteristics are similar to series-excited DC motors, and its low-speed torque is large. The switched reluctance motor has many controllable parameters, and it is easy to realize the conversion of electric and braking operation in the control, an...

Claims

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Application Information

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IPC IPC(8): H02P6/10H02P25/098
Inventor 陈昊
Owner CHINA UNIV OF MINING & TECH
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