A Cascaded Robust Predictive Current Control Method for Permanent Magnet Synchronous Motors
A technology for permanent magnet synchronous motors and current prediction, which is applied in motor generator control, AC motor control, electronic commutation motor control, etc., and can solve problems such as the influence of control system performance estimation/observation accuracy
Inactive Publication Date: 2020-11-03
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
In order to solve these problems, many experts and scholars have proposed parameter estimators and disturbance observers to compensate the system parameters and external disturbances, but the performance of the control system is easily affected by the accuracy of estimation / observation
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[0097] In order to eliminate the impact of inaccurate disturbance observation / parameter estimation on the control system, the present invention proposes a cascaded robust predictive current control method for permanent magnet synchronous motors. The control method has a simple design structure, is easy to implement, and has high robustness Stickiness and ease of use. The invention has great significance to the control and optimization of the servo system.
[0098] Such as figure 1 As shown, a cascaded robust predictive current control method for permanent magnet synchronous motors of the present invention includes the following steps:
[0099] Step 1: In the servo control system of the permanent magnet synchronous motor, the three-phase output current is collected in real time through the current sensor, and the rotor position and real-time speed of the motor are extracted in real time through the speed sensor;
[0100] Step 2: Transform the three-phase output current throug...
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The invention relates to a permanent magnet synchronous motor cascade robust prediction current control method. The method comprises the steps of: acquiring a difference value between an actual motorposition and an expected position, and inputting the difference value into a PI speed regulator to obtain an expected q-axis current component; and establishing a robust prediction current controllerof a permanent magnet synchronous motor, inputting expected d-axis and q-axis current components into the robust prediction current controller to obtain d-axis and q-axis voltage components of the motor, and achieving accurate control of the permanent magnet synchronous motor after voltage space vector pulse width modulation is performed after park inverse transformation. The robust predictive current controller is formed by connecting a model predictive current controller and a disturbance compensation controller in series, and is a cascade composite control method. The permanent magnet synchronous motor cascade robust prediction current control method utilizes the disturbance compensation controller to replace the traditional disturbance observer / parameter estimator, thereby eliminatingthe influence of inaccurate disturbance observation / parameter estimation on the control system.
Description
technical field [0001] The invention belongs to the control research field of servo motors, and relates to a cascaded robust predictive current control method for permanent magnet synchronous motors. Background technique [0002] With the acceleration of my country's "2025 intelligent manufacturing", "industrial upgrading", and "going out" strategies, the performance optimization and verification of servo system products in the field of industrial production is particularly important. In order to meet the performance requirements of industrial production, the control system of the servo motor must withstand harsh operating conditions, including frequent forward and reverse rotation, high acceleration and deceleration, and sharp changes in a wide range of loads. In the field of permanent magnet synchronous motor servo system, the strategy research to improve the performance of permanent magnet synchronous motor servo system has become the future development trend of permanent...
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IPC IPC(8): H02P21/22H02P25/026H02P27/08
CPCH02P21/22H02P25/026H02P27/08
Inventor 房立金王怀震许继谦赵乾坤
Owner NORTHEASTERN UNIV LIAONING