Jitter anti-disturbance method and device for hall sensor signal acquisition of permanent magnet synchronous motor
A permanent magnet synchronous motor, Hall sensor technology, applied in the direction of electronic commutator, torque ripple control, etc., can solve the problem of unable to obtain Hall state, permanent magnet synchronous motor jitter back and forth, stall, etc., to solve the problem of back and forth Jitter, improve anti-interference and signal-to-noise ratio, improve the effect of accuracy
Active Publication Date: 2021-06-01
湖北绿驰精密电驱动系统有限公司
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Problems solved by technology
[0004] In order to solve the above technical problems, the present invention provides a jitter anti-disturbance method and device for hall sensor signal acquisition of permanent magnet synchronous motors, so as to solve the problem that the effective Hall state cannot be obtained under low-speed operation or locked-rotor state in the prior art , causing the permanent magnet synchronous motor to vibrate back and forth or stall
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[0038] Example: such as Figure 1 As shown, a jitter anti-disturbance method for permanent magnet synchronous motor Hall sensor signal acquisition, including:
[0039] Step S10, filtering the Hall signal.
[0040] In this embodiment, during the starting process of the permanent magnet synchronous motor at a low speed, the signal collected by the Hall sensor is filtered to screen out the required bandwidth frequency, separate the useful signal from the noise, and improve the anti-interference and anti-interference performance of the signal. SNR.
[0041] Step S20, comparing the Hall state before filtering with the Hall state after filtering.
[0042] In this embodiment, it is observed whether the Hall state changes before and after filtering.
[0043] Step S30, if the Hall state before filtering is different from the Hall state after filtering, compare the Hall state before filtering with the Hall state before commutation.
[0044] In this example, if figure 2 As shown, i...
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The invention discloses a jitter anti-disturbance method and device for collecting hall sensor signals of a permanent magnet synchronous motor, wherein the method includes: filtering the hall signal; comparing the hall state before filtering with the hall state after filtering ; If the Hall state before filtering is different from the Hall state after filtering, compare the Hall state before filtering with the Hall state before commutation; if the Hall state before filtering is different from the Hall state before commutation If the states are different, obtain the filter count; when the filter count is greater than the preset value, perform forced commutation. The Hall state before filtering is different from the Hall state after filtering and the Hall state before commutation. After multiple filtering, the Hall state still has not returned to the expected Hall state, indicating that the permanent magnet synchronous motor is shaking. And it cannot recover by itself. At this time, the forced commutation is performed to make the permanent magnet synchronous motor run normally, which effectively solves the problem of the permanent magnet synchronous motor shaking back and forth at low speed.
Description
technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a jitter anti-disturbance method and device for signal collection of a hall sensor of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor has many advantages such as simple structure, high power density, and simple control. In recent years, permanent magnet synchronous motors have been increasingly widely used in industrial fields such as high-performance speed regulation systems and servo control systems. [0003] At present, most permanent magnet synchronous motors rely on Hall sensors to obtain the rotor position, but the accuracy of Hall sensors is low, and the existing technology relies on extracting the edge information of Hall sensors to realize the commutation of permanent magnet synchronous motors. In the rotating state, the effective Hall state cannot be obtained, resulting in the...
Claims
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IPC IPC(8): H02P6/16H02P6/10
CPCH02P6/16
Inventor 王浩陈张懿魏海峰李震李可礼刘维亭
Owner 湖北绿驰精密电驱动系统有限公司