Speed sensorless control method for permanent magnet synchronous motor based on MRAC observer

A permanent magnet synchronous motor, no speed sensor technology, used in motor control, motor generator control, electronic commutation motor control and other directions, can solve the problems of poor robustness and anti-interference, achieve strong robustness and noise, strong robustness and immunity, and the effect of overcoming the chattering problem

Inactive Publication Date: 2019-03-19
TIANJIN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a speed sensorless control method for permanent magnet synchronous motors based on MRAC observers, to solve the poor robustness and immunity of PI adaptive mechanisms in traditional model reference adaptive observers The problem

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  • Speed sensorless control method for permanent magnet synchronous motor based on MRAC observer
  • Speed sensorless control method for permanent magnet synchronous motor based on MRAC observer
  • Speed sensorless control method for permanent magnet synchronous motor based on MRAC observer

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Embodiment Construction

[0028] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] The invention is in figure 1 The shown model reference adaptive observer-based permanent magnet synchronous motor speed control system is implemented. The system includes two current loop PI controllers (PI1, PI2), speed loop PI controller (PI3), and IPARK transformation module , SVPWM modulation module, inverter bridge circuit, permanent magnet synchronous motor body, CLARK transformation module, PARK transformation module and a model reference adaptive observer module based on a superhelical sliding mode, and the model reference adaptive observer module based on a superhelical sliding mode The input terminal of the observer module is connected to the two output terminals of the PARK transformation module and the output terminals of the two current loop PI controllers (PI1 and PI2). The model based on the superhelical sliding mode refer...

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Abstract

The invention relates to a speed sensorless control method for a permanent magnet synchronous motor (PMSM) based on an MRAC observer. The method is characterized by connecting an improved model reference adaptive observer module based on a super-helical sliding mode to a PMSM speed regulating system to detect the rotor position and the rotational speed of the motor; inputting the stator current idand iq in a two-phase rotating coordinate system and a voltage reference value ud and a voltage reference value uq output by two current loop PI controllers into the model reference adaptive observermodule based on the super-helical sliding mode; and obtaining, by the model reference adaptive observer module based on a super-helical sliding mode, an estimated motor speed [ometa]e and a rotor angular position [theta] for speed feedback and PAR transformation and IPARK transformation after processing the data. The method replaces a PI link in a traditional model reference adaptive observer bya super-spiral sliding mode algorithm, so that the PMSM speed regulating system has good robustness and anti-interference performance, and improves the estimated accuracy of the motor speed and the rotor position.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, in particular to a speed sensorless control method of a permanent magnet synchronous motor based on an MRAC observer. Background technique [0002] In recent years, with the development and utilization of various rare earth resources, the application of permanent magnet synchronous motors has become more and more extensive. In order to achieve high-performance control of permanent magnet synchronous motors, it is essential to accurately measure the rotational speed and rotor position. The rotor position and speed can be obtained by mechanical encoders installed on the motor bearings, but in various complex work In the environment, the measurement accuracy and stability of the mechanical encoder will be affected, and the price of the mechanical encoder is relatively expensive, which increases the cost of the permanent magnet synchronous motor control system. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/28H02P21/18
CPCH02P2207/05H02P21/18H02P21/28
Inventor 李冬辉孙恺英刘玲玲
Owner TIANJIN UNIV
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