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Permanent magnet synchronous motor control system with load state observer

A permanent magnet synchronous motor and state observer technology, applied in control systems, vector control systems, motor generator control, etc., can solve the influence of motor speed, influence on system steady-state performance, system stability and robustness, etc. question

Inactive Publication Date: 2017-08-18
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0003] During the operation of the motor, if the load has a disturbance or a sudden change, in a typical double closed-loop control system, the disturbance will immediately affect the speed of the motor and affect the steady-state performance of the system; when the load changes frequently or the disturbance torque persists Without any adjustments to the original control system, the stability and robustness of the entire system will be greatly affected

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  • Permanent magnet synchronous motor control system with load state observer
  • Permanent magnet synchronous motor control system with load state observer
  • Permanent magnet synchronous motor control system with load state observer

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Embodiment Construction

[0015] In order to describe the technical characteristics of this solution in detail, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0016] The permanent magnet synchronous motor control system with a load state observer is based on vector control technology; the core of the vector control technology is field oriented control and coordinate transformation, through the rotor flux orientation, the current vector passes through the coordinates The transformation is decoupled into orthogonal and independent orthogonal axis current components to realize the decoupling of torque and excitation.

[0017] Perform coordinate transformation on the three-phase current of the permanent magnet synchronous motor to obtain the current i under the d-axis and q-axis d and i q ; Then the stator voltage equation of the permanent magnet synchronous motor in the d-q synchronous rotating coordinat...

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Abstract

The invention reveals a permanent magnet synchronous motor control system with a load state observer. The control system is based on the vector control, is combined with speed-and-current double closed-loop control, and is added with the load state observer wherein the load state observer includes a load torque observer and a moment-of-inertia identification module. The observed value of the load torque is used for the feedforward compensation of current control so as to raise the response speed and robustness of the controller. The moment-of-inertia identification result is used to adjust the ratio of the system's speed ring and the integral gain, so as to obtain the optimized speed loop response performance, and realize the self-tuning of the controller parameters.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor control system with a load state observer. Background technique [0002] The permanent magnet synchronous motor first appeared in the 1950s. In the 1980s, due to the breakthrough development of the new rare earth permanent magnet material, the function of the permanent magnet synchronous motor has been qualitatively improved, so it can be used in Many fields have been rapidly promoted; the traditional control method of permanent magnet synchronous motor is the speed and current double closed-loop control technology based on vector control. Vector control technology realizes the decoupling of motor flux and torque through coordinate transformation, which can be The torque control of a DC motor is mimicked while maintaining field orientation, thus enabling the dynamics of an AC motor to be comparable to that of a DC motor. [0003] During the operation of the motor, if the load has a disturba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/05H02P21/16H02P21/22
CPCH02P21/05H02P21/13
Inventor 金宁治邢桢林
Owner HARBIN UNIV OF SCI & TECH
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