Driving motor torque ripple active compensation method
A torque pulsation, drive motor technology, applied in the direction of torque pulsation control, etc., to achieve the effect of reducing the cost of use
Inactive Publication Date: 2018-09-14
江西精骏电控技术有限公司
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[0007] Another type of method is to design a speed detector and feed back the detection results to the speed control loop of the controller. However, this type of method generally uses an iterative algorithm, which essentially distorts the three-phase current and converts the pulsating component of the active power of the motor Dissipated as copper loss
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[0028] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.
[0029] like figure 1 The present invention shown is a drive system structure of a permanent magnet synchronous motor, including: a motor, a motor controller, and a speed sensor.
[0030] A 30kW hybrid drive motor is used, and the motor is a permanent magnet synchronous motor, which is mainly composed of a base, a rotor and a stator.
[0031] The motor is a permanent magnet synchronous motor, mainly composed of a base, a rotor and a stator.
[0032] The motor controller is composed of an intelligent microcomputer system and a power module.
[0033] The rotational speed sensor adopts a laser rotational speed sensor, which converts ...
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The invention discloses a driving motor torque ripple active compensation method comprising changing different speeds and measuring a relationship between the cogging torque ripple and the speed and angular position; calculating a driving signal required by a torque ripple opposite to the above torque ripple; applying a cogging torque ripple reverse driving signal, and reducing the cogging torqueripple by current; driving the motor by regular PWM to rotate at a low and constant speed, testing the rotation speed to obtain different-order PWM harmonic torque ripples, changing the average speed,and measuring the relationship between the harmonic torque ripples and the speed and angular position; using compensation PWM to drive the motor to rotate at low and constant average angular speed, testing the speed, and obtain the different-order harmonic residual torque ripple; and calculating the driving signal required by torque ripple opposite to the above torque ripple obtained in the previous steps. The above technical solution uses negative torque ripple to compensate, save energy and reduce consumption, and reduce costs.
Description
technical field [0001] The invention belongs to the technical field of motor drive control. More specifically, the present invention relates to a method for actively compensating torque ripple of a drive motor. Background technique [0002] In recent years, with the rapid development of electric vehicles, permanent magnet synchronous motors have gradually become the mainstream configuration of electric vehicle drive motors due to their simple structure, reliable operation, wide speed range, and high conversion efficiency. [0003] Due to the existence of factors such as cogging torque, flux harmonics, and current detection errors, permanent magnet motors will produce periodic torque ripples, which will further cause periodic speed ripples, resulting in mechanical vibration and noise. [0004] In the prior art, the methods for suppressing torque ripple mainly fall into the following categories: [0005] One type of method is to design a torque detector to estimate the torqu...
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IPC IPC(8): H02P6/10
CPCH02P6/10
Inventor 王长江覃云王世强玉国成刘鹏
Owner 江西精骏电控技术有限公司