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Position-free control method of current source type synchronous reluctance motor system

A synchronous reluctance motor, current source technology, applied in the direction of motor generator control, electronically commutated motor control, motor control, etc., can solve the problems such as the application of few current source motor drive systems, and avoid system reliability The effects of lowering, strong suppression, and increased sensitivity to disturbance and noise

Inactive Publication Date: 2019-09-17
SOUTHEAST UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

These methods in the previous studies are all for the voltage source motor drive system, and are rarely applied in the current source motor drive system

Method used

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  • Position-free control method of current source type synchronous reluctance motor system
  • Position-free control method of current source type synchronous reluctance motor system
  • Position-free control method of current source type synchronous reluctance motor system

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0030] Such as figure 1 The topology of the current source synchronous reluctance motor drive system shown, including:

[0031] A synchronous reluctance motor 1.9, which is connected in parallel with a three-phase filter capacitor bank 1.8;

[0032] The three-phase filter capacitor bank 1.8 is connected to the current source inverter unit 1.7;

[0033] The current source inverter unit 1.7 is connected in series with the DC bus inductors 1.5 and 1.6 through the incoming terminal of the DC side;

[0034] The DC bus inductance 1.5, 1.6 is fed by the current source rectifier unit 1.4;

[0035] The current source rectifier unit 1.4 is connected to the LC filter at the grid side;

[0036] The LC filter includes a three-phase grid-connected inductor 1.2 and a three-phase filter capacitor 1.3 connected in parallel therewith, wherein: the other end of t...

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Abstract

The invention discloses a position-free control method of a current source type synchronous reluctance motor system. The problems of reduced system reliability, sensitivity to disturbance and noise and increased system cost caused by a motor position sensor can be solved. The system structure comprises an AC power grid; a current source type rectifier unit is connected with a multi-winding transformer through a three-phase filter capacitor bank; the current source rectifier unit is connected with a current source inverter unit through a DC bus inductor; and the current source inverter unit is connected with the synchronous reluctance motor through the three-phase filter capacitor bank. The position-free control strategy comprises the following steps: injecting a high-frequency current signal into the d axis of the motor; sampling and calculating the motor stator voltage to obtain the stator q-axis voltage of the motor; extracting a high-frequency component in the q-axis voltage of the motor, and processing to obtain a position signal of a motor rotor; and establishing a predicted rotor coordinate system to realize position-free control of the synchronous reluctance motor.

Description

technical field [0001] The invention relates to a control method driven by a current source type motor, in particular to a positionless control method for a synchronous reluctance motor system fed by a current source type power converter, belonging to the field of motors. Background technique [0002] At present, the current source motor drive system based on the pulse width modulation strategy is gradually attracting the attention of scholars. Compared with the voltage source drive system, the current source has the characteristics of simple topology, four-quadrant operation, reliable short-circuit protection and low dv / dt. On the other hand, compared with other AC motors, synchronous reluctance motor has its outstanding features, such as high efficiency, high torque density and simple manufacturing process. In addition, the rare earth materials used to make permanent magnet motors are very precious. For the sake of economic benefits, synchronous reluctance motors are good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18H02P21/18
CPCH02P6/183H02P21/18H02P2203/11
Inventor 王政宋秋晓刘鹏程徐阳程明
Owner SOUTHEAST UNIV
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