A Method for Suppressing Speed ​​Fluctuation of Permanent Magnet Synchronous Motor

A technology for permanent magnet synchronous motors and speed fluctuations, applied in torque ripple control, motor generator control, electronically commutated motor control, etc., can solve problems such as poor suppression effect, slow response, and large amount of calculation for the controller

Active Publication Date: 2019-11-12
CETC WUHU DIAMOND AIRCRAFT MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Repetitive controllers are better at suppressing speed fluctuations under periodic loads, but less effective at suppressing nonlinear loads; in addition, the controller has a large amount of calculation and slow response

Method used

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  • A Method for Suppressing Speed ​​Fluctuation of Permanent Magnet Synchronous Motor
  • A Method for Suppressing Speed ​​Fluctuation of Permanent Magnet Synchronous Motor
  • A Method for Suppressing Speed ​​Fluctuation of Permanent Magnet Synchronous Motor

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Embodiment Construction

[0031] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0032] The present invention suppresses the disturbance by designing a controller with an equivalent input disturbance algorithm, observes the state variable of the motor under load disturbance by designing a state observer, calculates the difference between the state variable and the expected state variable of the motor, and guarantees the disturbance amount through the gain L of the state observer quickly converges to a stable value, and then transforms the matrix B + Output the fluctuation caused by load disturbance. The fluctuation is adjusted and filtered by the filter and then input to the motor control system. The speed fluctuation suppression effect on the motor system is equivalent to the speed fluctuation effect of the load on the motor system, that is, the equivalent load The flu...

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Abstract

The invention discloses an inhibition method for speed fluctuation of a permanent magnet synchronous motor. The fluctuation quantity of the motor speed under load disturbance is observed through a designed state observer, an equivalent load disturbance is obtained by a designed observer gain and a filter, the equivalent load disturbance acts on a motor system, and a speed fluctuation opposite to the load disturbance is generated by the motor system, so that the speed fluctuation of the motor under load disturbance is neutralized. According to the method, on the basis of a vector control system with id=0, the equivalent input load disturbance is obtained by the designed state observer, the observer gain and the filter, and the speed fluctuation caused by load disturbance is neutralized. The simulation experiment indicates that speed fluctuation can be quickly responded to by the inhibition method for motor speed fluctuation based on an equivalent input disturbance algorithm, rotation fluctuation caused by cyclic load signals, step load signals and irregular load signals can be effectively inhibited, and high-precision control of a speed adjustment system is achieved.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method for suppressing fluctuations in rotational speed of a permanent magnet synchronous motor. Background technique [0002] Due to its high power density, large torque, small size, high efficiency, simple control, and high precision, permanent magnet synchronous motors are widely used in drive control systems such as industrial robots, electric vehicles, and aerospace. Due to the different forms of loads driven by permanent magnet synchronous motors, the forms of load signals are also different, such as periodic load signals, nonlinear load signals, step load signals, irregular load signals, etc., by analyzing the dynamics of permanent magnet synchronous motors The electromagnetic torque equation knows that when these loads are added to the permanent magnet synchronous motor control system, it will cause fluctuations in the speed, which in turn will cause vibration of the motor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P6/34H02P6/00H02P21/18
CPCH02P6/005H02P6/10H02P6/34H02P21/18
Inventor 程靖曾锐李慧颖周义张兵唐云霄林琳
Owner CETC WUHU DIAMOND AIRCRAFT MFG
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