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A Double-loop Deadbeat Predictive Control Method for Permanent Magnet Synchronous Motor Based on Disturbance Estimation and Compensation

A permanent magnet synchronous motor and predictive control technology, applied in motor generator control, motor control, electronic commutation motor control and other directions, can solve problems such as the inability to weaken the speed loop control performance affected by load changes, and the inability to eliminate motor parameter errors.

Active Publication Date: 2020-12-01
杭州领芯微电子有限公司
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Problems solved by technology

[0005] In order to overcome the shortcomings of existing permanent magnet synchronous motor prediction methods that cannot eliminate motor parameter errors and the impact of unmodeled dynamics on the performance of deadbeat current prediction control, and cannot weaken the speed loop control performance affected by load changes, the method of the present invention The purpose is to provide a double-loop deadbeat predictive control method for permanent magnet synchronous motors based on disturbance estimation compensation

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  • A Double-loop Deadbeat Predictive Control Method for Permanent Magnet Synchronous Motor Based on Disturbance Estimation and Compensation
  • A Double-loop Deadbeat Predictive Control Method for Permanent Magnet Synchronous Motor Based on Disturbance Estimation and Compensation
  • A Double-loop Deadbeat Predictive Control Method for Permanent Magnet Synchronous Motor Based on Disturbance Estimation and Compensation

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Embodiment Construction

[0078] The present invention will be further described below in conjunction with the accompanying drawings.

[0079] refer to Figure 1-Figure 7 , a double-loop deadbeat predictive control method for permanent magnet synchronous motors based on disturbance estimation compensation, including the following steps:

[0080] Step 1, establish a discrete permanent magnet synchronous motor current prediction model, and design a current loop controller, the process is as follows:

[0081] 1.1, the voltage equation of the PMSM in the synchronous rotating coordinate system is expressed in the following form

[0082]

[0083] where u d and u q d, q axis stator voltage, i d and i q is the d, q axis stator current, L d =L q =L is stator inductance, R is stator resistance, ψ f is the permanent magnet flux linkage, ω e is the electrical angular velocity;

[0084] 1.2, using the first-order Taylor formula to discretize the current state equation to obtain a discrete permanent mag...

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Abstract

A double-ring dead-beat prediction control method for a permanent magnet synchronous motor based on disturbance estimation compensation comprises the following steps: establishing a discrete current prediction model of the permanent magnet synchronous motor, and designing a dead-beat current prediction controller; designing a sliding mode disturbance observer to estimate stator current and parameter disturbance; designing a dead-beat speed prediction controller; and designing a sliding mode disturbance observer to observe and compensate the load torque. According to the invention, under the condition that motor model parameters are not matched, the method achieve the accurate current control; under the condition that the dead-beat speed prediction controller is sensitive to load change, the method achieves the improvement of the dynamic and static performance and the anti-disturbance performance of the speed outer ring through load torque observation and compensation.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, in particular to a double-loop deadbeat predictive control method for permanent magnet synchronous motors based on disturbance estimation and compensation. Background technique [0002] Permanent magnet synchronous motors are widely used in servo systems, electric vehicles, and industrial automation due to their high power density. In the actual permanent magnet synchronous motor drive system, the control performance of the current inner loop and the speed outer loop is the key to determine the system performance. Therefore, in order to achieve high dynamic performance and high steady-state precision control of current and speed, experts and scholars have proposed many control strategies for the design of current loop and speed loop, including PID control, lead-lag control, sliding mode control and predictive control. Wait. [0003] Among the above control str...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/13H02P21/14H02P21/22
CPCH02P21/0007H02P21/13H02P21/14H02P2207/05H02P21/22
Inventor 吴春吕炜杰南余荣
Owner 杭州领芯微电子有限公司
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