Permanent magnet motor sliding mode control strategy

A permanent magnet motor and control strategy technology, applied in motor generator control, electronic commutation motor control, control system, etc., can solve the problem of affecting the dynamic response speed of double closed-loop control, can not well suppress load disturbance, and affect system control. Accuracy and other issues, to achieve the effect of improving anti-disturbance performance, reducing fluctuation, and fast convergence
CN103647490AActive Publication Date: 2014-03-19TIANJIN UNIV
5 Cites 81 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2014-03-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention pertains to the technical field permanent magnet motors, and relates to a permanent magnet motor sliding mode control strategy. The permanent magnet motor is controlled by adopting double-closed speed current. The permanent magnet motor sliding mode control strategy is characterized in that a sliding mode speed controller and an extended sliding mode observer are adopted in the control strategy, the sliding mode speed controller adopts an exponential approach law containing the speed error and the sliding mode surface information, the deviation between a given rotating speed and a feedback rotating speed is taken as the input quantity, and a q-axis current given value is outputted through the sliding mode control quantity; the extended sliding mode observer is used to estimate the rotor position, the rotating speed and the load torque on a real-time basis, the rotating speed and the rotor position are used to provide the information of speed closed-loop control and coordinate transformation, and the load torque is compensated to the sliding mode speed controller, so that the high-accuracy vector control of the permanent magnet motor can be realized. The control strategy of the invention can be used to make the system fast track a given speed in the dynamic state, reduce the speed overshoot and the current fluctuation, and improve the disturbance resistance performance of the system.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of permanent magnet motors, and relates to a motor sliding mode control strategy. Background technique

[0002] Since the permanent magnet synchronous motor is a multivariable, strongly coupled nonlinear system, the performance of traditional linear control such as PI control is easily affected by system uncertainty and external disturbance, which will reduce the reliability of system operation and dynamic and static performance. Sliding mode variable structure control has the advantages of strong robustness to uncertain disturbances and fast dynamic response. It can still obtain good tracking performance under external disturbances and parameter changes, and has a fast dynamic response speed. It has been successfully applied to permanent magnet synchronous motor AC servo system.

[0003] Due to the discontinuous switch control in the sliding mode control, chattering becomes an inherent characteristic of th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More