PMSM sensor-less sliding mode control system and method

A permanent magnet synchronous motor and control system technology, applied in the control system, vector control system, motor generator control, etc., can solve the problems of damaging the controller, destroying the stability of the system, and affecting the performance of the control system, so as to reduce costs, The effect of weakening system chattering and shortening the time

Inactive Publication Date: 2017-08-18
XI AN JIAOTONG UNIV
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Problems solved by technology

The sliding mode observer method has been widely studied and applied due to its fast response speed and easy implementation, but the existence of sliding mode chattering will affect the performance of the control system, and may even destroy the stability of the system and damage the controller.

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  • PMSM sensor-less sliding mode control system and method
  • PMSM sensor-less sliding mode control system and method
  • PMSM sensor-less sliding mode control system and method

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings. All similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0029] like figure 1 As shown, a sensorless sliding mode control system for permanent magnet synchronous motor, including sliding mode controller module, sliding mode observer module, current controller module, Parker inverse transform module, Parker transform module, Clarke transform module, space vector modulation module, three-phase inverter module and control object module. The output end of the sliding mode controller module speed controller is connected to the input end of the quadrature axis current control module of the current controller module; The input terminal of the module is connected; the output terminal of the Parker inverse transformation module is connected with the input terminal of the space vector modu...

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Abstract

The invention discloses a PMSM sensor-less sliding mode control system and method. The rotor position and a speed of the PMSM are estimated through employing a novel sliding mode observer, and a sliding mode controller based on a novel approach law is employed at a rotating speed controller. Sliding mode control has relatively good robustness, the structure is simple, and engineering realization is easy. The time of the system approaching the sliding mode surface is shortened through the sliding mode controller based on the novel approach law, and a system response speed and dynamic performance are improved. A rotor position sensor is replaced by the sliding mode observer to estimate the rotor position and a speed signal, cost is substantially reduced, and system stability is improved. A power series saturation function is utilized to replace a sign function in the sliding mode control law, and system buffeting existing in a traditional sliding mode observer is effectively reduced.

Description

technical field [0001] The invention belongs to the field of motor control, in particular to a sensorless control system for permanent magnet synchronous motors. Background technique [0002] With the emergence of rare earth permanent magnet materials NdFeB, permanent magnet synchronous motors have been widely used in production and life under the support of rapid development of power electronics technology and motor control technology. The rotor position and speed of the motor in the vector control system of the permanent magnet synchronous motor are obtained by the sensor, but the installation of the mechanical sensor will lead to a great increase in cost, and at the same time increase the occupied area of ​​the motor, and the application occasions are limited. Therefore, sensorless control technology has important practical value and practical significance. [0003] Prior to this, experts and scholars have conducted a lot of research on sensorless control technology and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/18
CPCH02P21/0007
Inventor 刘凌胡全龙王悍枭杨航张诚
Owner XI AN JIAOTONG UNIV
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