Permanent-magnet-synchronous-motor sensorless control system

A permanent magnet synchronous motor and control system technology, applied in control systems, motor control, vector control systems, etc., can solve problems such as high hardware performance requirements and complex algorithm implementation, and achieve good system stability, simple algorithms, and easy Achieved effect

Inactive Publication Date: 2017-08-29
HUBEI UNIV OF AUTOMOTIVE TECH
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Problems solved by technology

Although the sliding mode observer algorithm is relatively easy to implement and does not require high hardware, it has chattering problems; the extended Kalman filter has a filtering effect on noise and has good anti-interference ability, but the algorithm is complex to implement and affects hardware performance. more demanding

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Embodiment Construction

[0046] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] 1. Permanent magnet synchronous motor sensorless control system

[0048] The block diagram of the position sensorless vector control system of permanent magnet synchronous motor based on Luenberger observer is as follows: figure 1 As shown, the back electromotive force e of the motor is estimated by using the easily measured voltage and current α 、e β , using the relationship between the rotor position and speed and the back electromotive force, the rotor position information θ and the speed outer loop feedback information ω required by the current inner loop of the double closed-loop control system can be calculated r , the control system uses 3 PI regulators and voltage space vector pulse width modulation (SVPWM) technology to control the operation of the motor.

[0049] 2.1 Luenberger observer d...

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Abstract

The invention discloses a permanent-magnet-synchronous-motor sensorless control system. In permanent-magnet-synchronous-motor vector control, according to a Luenberger observer principle, a PMSM rotor speed and position estimation method based on a Luenberger observer is provided so that some disadvantages of a permanent magnet synchronous motor because of installation of a mechanical sensor are effectively overcome. A Matlab/Simulink tool is used to construct a control system simulation model and carry out simulation verification. A simulation result shows that the control system possesses good control performance. Finally, algorithm realization is performed on a hardware system taking STM32F103ZET6 as a control core. An experiment result shows that the permanent-magnet-synchronous-motor control system based on the Luenberger observer possesses high control precision and stability is good.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a sensorless control system for a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have the characteristics of high dynamic performance, high power density, and light weight. With the development of power electronics technology and microprocessor technology, permanent magnet synchronous motors have been widely used. At present, the control methods of permanent magnet synchronous motor mainly include vector control and direct torque control. Vector control is to realize the excitation current and The decoupling of torque and current can obtain the same dynamic speed regulation performance as that of DC motor; direct torque control can directly realize flux calculation and torque control in the stator coordinate system through the analysis method of space vector, but it has flux linkage and Torque ripple problem, so choos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/24H02P21/13H02P21/18H02P25/022
CPCH02P21/13H02P2207/05
Inventor 黄海波程登良周双飞卢军熊武赵熠聂向前
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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