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Permanent magnet synchronous motor torque ripple suppression method based on adaptive filter

An adaptive filter, permanent magnet synchronous motor technology, applied in the direction of torque ripple control, motor control, motor generator control, etc. The effect of remarkable suppression effect, suppression of torque ripple, and simple introduction method

Inactive Publication Date: 2021-06-11
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the vector control of the permanent magnet synchronous motor, the space vector pulse width modulation strategy, the switching voltage dead zone between the upper and lower bridge power devices of the inverter, and the cogging torque existing in the permanent magnet synchronous motor body will cause the permanent magnet Torque ripple during synchronous motor operation, especially in low-speed and ultra-low-speed application scenarios, torque ripple causes serious performance degradation of permanent magnet synchronous motors, which affects the application of permanent magnet synchronous motors in high-precision fields
[0003] For the suppression technology of permanent magnet synchronous motor torque ripple, the existing methods can be divided into two categories: one is to optimize the design of the permanent magnet synchronous motor body to suppress the cogging torque. This kind of method has a long period of time and costs High, and under the given condition of the motor, it cannot be implemented; one is to realize the torque ripple suppression of the permanent magnet synchronous motor by adding the torque ripple suppression algorithm in the control system. The existing torque ripple suppression algorithm includes harmonic Voltage compensation, proportional resonance control and repetitive control, etc., but the above methods have the problems of large amount of calculation, complex implementation or poor versatility

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  • Permanent magnet synchronous motor torque ripple suppression method based on adaptive filter
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  • Permanent magnet synchronous motor torque ripple suppression method based on adaptive filter

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Embodiment 1

[0031] The object of the present invention is to provide a method for suppressing the torque ripple of a permanent magnet synchronous motor. The method is simple in calculation, easy to implement, versatile and suitable for practical motor control engineering applications.

[0032] The technical solution to realize the object of the present invention is to add a second-order generalized integrator based on the second-order generalized integrator in the current loop of the permanent magnet synchronous motor vector control system, and solve the harmonic current frequency with the motor speed to realize the self-adaptation of the self-adaptive rate. The filter (AF) realizes the extraction and compensation of the harmonic current in the current loop, thereby suppressing the torque ripple of the permanent magnet synchronous motor. Such as figure 1 shown.

[0033] The implementation steps of the technical solution are as follows:

[0034] Construct a basic vector control system wi...

Embodiment 2

[0051] Based on embodiment 1, the permanent magnet synchronous motor control system of the present invention, such as figure 1 As shown, it includes the current loop PI controller, the speed loop PI controller, the space vector pulse width modulation module, the position signal acquisition module, the feedback speed calculation module, the feedback current calculation module, the coordinate transformation module, and the current loop based on Harmonic current extraction compensation module of adaptive filter.

[0052] The function of the position signal acquisition module is to acquire the rotor position information of the permanent magnet synchronous motor in real time θ e ; The function of the feedback speed calculation module is to calculate the rotational angular velocity ω of the motor rotor according to the position angle of the motor rotor; the function of the feedback current calculation module is to convert the external motor drive current signal into a processable el...

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Abstract

A permanent magnet synchronous motor torque ripple suppression method based on an adaptive filter comprises the following steps: based on a second-order generalized integrator, calculating harmonic current frequency according to the speed of a motor to realize the adaptive filter with an adaptive rate; and introducing the realized adaptive filter into a current loop of a motor vector control system by a specific method to realize extraction and compensation of harmonic current in the current loop and inhibit the torque ripple of the permanent magnet synchronous motor. The method is simple in structure, convenient to calculate and easy to implement, the torque ripple of the motor can be effectively suppressed, and the suppression effect is still effective under the conditions that the rotating speed of the motor is changed and the load is suddenly changed.

Description

technical field [0001] The invention relates to a method for suppressing torque ripple of a permanent magnet synchronous motor based on an adaptive filter, relates to the field of permanent magnet synchronous motor control, and particularly relates to a method for suppressing torque ripple of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in robotics, CNC machine tools, aerospace and other fields. At present, the control strategy of permanent magnet synchronous motors in the industrial field generally adopts the field-oriented vector control strategy. In the vector control of the permanent magnet synchronous motor, the space vector pulse width modulation strategy, the switching voltage dead zone between the upper and lower bridge power devices of the inverter, and the cogging torque existing in the permanent magnet synchronous motor body will cause the permanent magnet Torque ripple during synchronous m...

Claims

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Application Information

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IPC IPC(8): H02P21/05H02P6/10
CPCH02P21/05H02P6/10H02P2207/05
Inventor 任武段超邢立华孙章军郑雲李琳郑宏滨
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES