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Control method of PMSM servo system current loop

A technology of servo system and control method, which is applied in motor control, motor generator control, AC motor control, etc. It can solve problems such as high real-time requirements, inability to quickly converge to a stable value, and large amount of calculation to achieve current loop The effect of model simplification

Inactive Publication Date: 2019-12-31
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0011] Although the rule-based parameter self-tuning strategy can avoid parameter identification errors and changes in the control structure, it has a large amount of calculation. Due to the cost of the main control chip of the servo drive, the main frequency is generally low, and the real-time requirements are high, so the control parameter optimization process cannot be guaranteed. quickly converges to a stable value in

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  • Control method of PMSM servo system current loop
  • Control method of PMSM servo system current loop
  • Control method of PMSM servo system current loop

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Embodiment Construction

[0049] In order to quickly obtain a set of current loop control parameters with ideal control performance, the model-based parameter tuning method and parameter optimization method are combined, and the control parameters obtained based on the current loop model tuning are used as initial values. The optimization based on the performance index objective function can effectively reduce the optimization time, improve the efficiency and obtain the current loop control parameters with better performance.

[0050] The motor is the controlled object of the current loop, and its characteristic parameters are the key to the self-tuning of the current loop based on the model, but generally its phase resistance and inductance parameters are unknown, so it is necessary to identify the parameters of the motor.

[0051] 1. Establishment of the current loop model

[0052] Current Loop Transfer Function Model

[0053] The current loop of the servo system mainly includes four links: current ...

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Abstract

The invention relates to a permanent magnet synchronous motor, in particular to a control method of a PMSM servo system current loop. The existing servo system control parameter setting method or theidentification of motor electrical parameters has errors or large amount of calculation and cannot ensure rapid convergence to stable values in the optimization process of control parameters. The invention provides the control method of the PMSM servo system current loop. The current loop comprises a power supply, a current controller, an inverter, a PMSM and a current detection unit. The input current of the power supply passes through the inverter and the PMSM in turn to output current. The current detection unit samples the output current and feeds it back to the power supply. The method controls the current according to the actual open-loop transfer function and the actual closed-loop function through the current controller. The control method combines the advantages of the two technologies in the prior art and reduces the error and the calculation amount of the electrical parameters.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a control method for a current loop of a PMSM servo system. Background technique [0002] With the rapid development of power electronics technology, microelectronics technology and permanent magnet material technology and the continuous deepening of control theory research, the servo control system of AC permanent magnet synchronous motor has been developed rapidly. PMSM (Permanent Magnet Synchronous Motor, permanent magnet synchronous motor) has been widely used in high-tech fields due to its small size, light weight, small moment of inertia, and superior speed regulation performance. Control performance also puts forward higher requirements. [0003] The key to the servo system is the servo drive. The control algorithm of the servo drive directly determines the control performance of the servo system. Algorithms such as adaptive control, predictive control, and synovial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/14H02P21/22H02P25/022
CPCH02P21/0003H02P21/14H02P21/22H02P25/022H02P2205/01H02P2207/05
Inventor 陈天航宋宝唐小琦周向东朱思明石鑫邹益刚孙彬
Owner HUAZHONG UNIV OF SCI & TECH
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