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A kind of compensation method and device for suppressing motor periodic torque fluctuation

A periodic force and fluctuation compensation technology, which is applied in the control system, electrical components, motor control, etc., can solve the problem that the low-speed performance of the servo control system is greatly affected, and achieve the effect of suppressing the torque fluctuation of the motor

Active Publication Date: 2020-10-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The periodic torque fluctuation of the permanent magnet synchronous motor is divided into high-frequency fluctuation and low-frequency fluctuation in the frequency domain. The high-frequency fluctuation signal can be effectively suppressed by increasing the current closed-loop bandwidth; however, the low-frequency fluctuation within the current closed-loop bandwidth It still exists in the control signal and has a great influence on the low-speed performance of the servo control system

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  • A kind of compensation method and device for suppressing motor periodic torque fluctuation
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  • A kind of compensation method and device for suppressing motor periodic torque fluctuation

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[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under app...

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Abstract

The compensation method and device for suppressing the periodic torque fluctuation of the motor provided by the present invention suppresses the low-frequency periodic torque fluctuation signal in the current feedback signal. The signal is identified, and then the signal obtained by the identification is fed forward to the reference input terminal of the current controller, and the theoretical reference value of the current controller is corrected, so as to achieve the purpose of suppressing the torque fluctuation of the motor.

Description

technical field [0001] The invention relates to the field of motor torque fluctuation compensators, in particular to a compensating method and device for suppressing motor periodic torque fluctuation. Background technique [0002] The permanent magnet synchronous motor has cogging effect, edge effect and high-order current harmonics, etc., which will cause the motor torque to fluctuate periodically with the rotor position. The periodic fluctuation of the torque will lead to the decline of the positioning performance of the servo control system, so it is necessary to suppress the torque fluctuation of the motor. At present, the solutions to the minimization of motor torque fluctuation are mainly divided into two categories: 1) improving the structure design of the motor; 2) improving the compensation control strategy. The first type of methods mainly include inclined slot method, oblique pole method, improved stator and rotor magnetic circuit method, etc. These methods can ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10
CPCH02P6/10H02P2207/05
Inventor 邓永停李洪文赵金宇
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI