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Permanent-magnet synchronous motor torque control system and method based on a sliding-mode observer and auto-disturbance rejection control

A technology of permanent magnet synchronous motor and sliding mode observer, which is applied in the direction of control system, control generator, vector control system, etc., and can solve problems such as difficult to meet the dynamic performance of the current loop, integral saturation, etc.

Pending Publication Date: 2017-11-17
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of controller has integral saturation, and is a nonlinear, multi-input coupling system, which is difficult to meet the dynamic performance required by the current loop in a high-performance servo system

Method used

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  • Permanent-magnet synchronous motor torque control system and method based on a sliding-mode observer and auto-disturbance rejection control
  • Permanent-magnet synchronous motor torque control system and method based on a sliding-mode observer and auto-disturbance rejection control
  • Permanent-magnet synchronous motor torque control system and method based on a sliding-mode observer and auto-disturbance rejection control

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Effect test

Embodiment 1

[0051] The execution subject of the permanent magnet synchronous motor torque control method in this embodiment is a sliding mode observer and an active disturbance rejection current controller, figure 1 It is a schematic flowchart of a method for controlling the torque of a permanent magnet synchronous motor based on a sliding mode observer and active disturbance rejection control according to Embodiment 1 of the present invention. like figure 1 As shown, this embodiment provides a permanent magnet synchronous motor torque control method based on a sliding mode observer and active disturbance rejection control. The method is based on a permanent magnet synchronous motor control system, including:

[0052] Step 1, establishing the mathematical model of the permanent magnet synchronous motor under the condition of demagnetization fault;

[0053] Step 2, designing a sliding mode observer based on minimum order extended flux linkage;

[0054] Step 3, design ADRC current control...

Embodiment 2

[0080] figure 2 It is a schematic diagram of the principle of the permanent magnet synchronous motor torque control system based on the sliding mode observer and active disturbance rejection control according to the second embodiment of the present invention, as figure 2 As shown, the system includes: extended flux linkage sliding mode observer 7, active disturbance rejection current controller 8, PI controller 9, upper computer 1, upper computer 2; the input terminals of active disturbance rejection current controller 8 are respectively connected with The output end of the extended flux linkage sliding mode observer 7, the output end of the upper computer 2, and the output end of the PI controller 9 are connected, and the input end of the PI controller 9 is connected with the output end of the upper computer 1 and the extended flux linkage sliding mode observer 7's output connection.

[0081] Described extended flux linkage sliding mode observer 7 comprises: sliding mode o...

Embodiment 3

[0092] This embodiment is a supplementary description based on the first embodiment.

[0093] image 3 According to the schematic diagram of the system structure of Embodiment 2 of the present invention, in order to realize the system, it also needs: permanent magnet synchronous motor 1, signal acquisition unit 2, three-phase bridge inverter circuit 3, SVPWM module 4, photoelectric encoder 5, Coordinate transformation module 6, inverse Park transformation module 10; The output end of coordinate transformation module 6 is respectively connected with the input end of extended flux linkage sliding mode observer 7, the input end of active disturbance rejection current controller 8, and the input of inverse Park transformation module 10 terminal connection, the output end of the inverse Park transformation module 10 is connected with the input end of the SVPWM module 4, the output end of the SVPWM module 4 is connected with the input end of the three-phase bridge inverter circuit 3...

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Abstract

The invention discloses a permanent-magnet synchronous motor torque control system and method based on sliding-mode observer and auto-disturbance rejection control, so that the torque of the permanent-magnet synchronous motor is controlled rapidly and precisely. A minimal-order extended flux-linkage sliding-mode observer is designed; an auto-disturbance rejection current controller is designed; difference processing is carried out on an electromagnetic torque outputted by an observer and a given torque signal outputted by an upper computer and the difference is inputted into a PI controller; a q-axis current signal outputted by the PI controller and dq-axis flux-linkage component outputted by the observer are inputted into the auto-disturbance rejection current controller to form a torque closed loop. According to the permanent-magnet synchronous motor torque control system and method, the dynamic response of the output torque of the motor is accelerated and no overshoot phenomenon is avoided. Moreover, on the basis of combination of the sliding-mode observer and the auto-disturbance rejection controller, the reliability and robustness of the torque control of the permanent-magnet synchronous motor are enhanced. The permanent-magnet synchronous motor torque control system and method are applied to occasions with the permanent-magnet synchronous motor as a driving system.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control equipment, and in particular relates to a permanent magnet synchronous motor torque control system and method based on a sliding mode observer and active disturbance rejection control, which is suitable for fast and high torque control of permanent magnet synchronous motors. precision control. technical background [0002] Due to its small size, high efficiency, and high power density, permanent magnet synchronous motors are widely used in aerospace, CNC machine tools, electric vehicles, and rail traction, and many other special electrical transmission fields that require high torque performance. With the expansion of the application field of permanent magnet synchronous motors, higher and higher requirements are put forward for the performance of servo system control. The high-performance permanent magnet synchronous motor servo system control requires a wide t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/13
CPCH02P21/0007H02P21/13H02P2205/05
Inventor 黄刚吴公平赵凯辉张昌凡于惠钧刘建华
Owner HUNAN UNIV OF TECH
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