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Motor position-vector-free control system based on dead zone compensation and motor system

A technology of dead zone compensation and position vector, which is applied in vector control system, control system, motor control, etc., can solve the problem of unsatisfactory control performance of motor non-position control system, achieve steady-state error oscillation reduction, and avoid phase lag , Improve the effect of control performance

Inactive Publication Date: 2020-02-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, due to the influence of the dead zone effect, there is often a large error between the observed value estimated by the observer and the actual value, which makes the control performance of the motor positionless control system unsatisfactory.

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  • Motor position-vector-free control system based on dead zone compensation and motor system
  • Motor position-vector-free control system based on dead zone compensation and motor system
  • Motor position-vector-free control system based on dead zone compensation and motor system

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Embodiment Construction

[0059] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0060] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0061] In order to improve the control performance of the permanent magnet synchronous motor, the motor positionless vector control system based on dead zone compe...

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Abstract

The invention discloses a position-vector-free control system based on dead zone compensation and a motor system, which belong to the technical field of power electronic control. The system comprisesa current sampling module, an observation module, a feedback control module, a dead zone compensation module and an SVPWM module, wherein the input end of the current sampling module is connected to athree-phase bridge arm; the first input end of the observation module is connected to the output end of the current sampling module, the second input end is used for receiving a voltage vector Ualphabeta, the third input end is connected to the second output end of the observation module for estimating the position and the angular velocity of a motor rotor and filtering out fifth harmonics and seventh harmonics; three input ends of the feedback control module are respectively connected to the first output end and the second output end of the observation module and the output end of the current sampling module; the first input end of the dead zone compensation module is used for receiving phase current, and the second input end is connected to the output end of the feedback control module;and the input end and the output end of the SVPWM module are respectively connected to the output end of the dead zone compensation module and the three-phase bridge arm. The control performance of the permanent magnet synchronous motor can be improved.

Description

technical field [0001] The invention belongs to the technical field of power electronic control, and more specifically relates to a motor positionless vector control system and a motor system based on dead zone compensation. Background technique [0002] In recent years, energy shortage has restricted the development of human society. With the discovery of high-performance rare earth permanent magnet materials in my country and the continuous development of power electronic devices, motors are widely used in industrial automation, robots and electric vehicles. The motors used in the electrical transmission industrial control industry are mainly divided into AC motors and DC motors, and AC motors can be further divided into induction AC motors and permanent magnet synchronous motors. The permanent magnet synchronous motor not only has the advantages of high reliability, simple structure, small size, and good control performance. Compared with the DC motor, the permanent magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18H02P21/13H02P6/182H02P25/026H02P27/08
CPCH02P6/182H02P21/13H02P25/026H02P27/08H02P2203/03H02P2205/01H02P2207/05H02P21/18
Inventor 尹泉罗慧刘青
Owner HUAZHONG UNIV OF SCI & TECH
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