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Control system of alternating current permanent magnet synchronous motor

A motor and controller technology, applied in the field of motors, can solve the problems of current regulator saturation, uncontrollable system state, etc., and achieve the effect of improving performance, reliability and stability

Active Publication Date: 2014-09-03
江苏华晟知识产权运营有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, after the AC permanent magnet synchronous motor powered by a voltage-type inverter works in the high-speed area, since the stator voltage is close to the limit, the current regulator may be saturated so that the current is under open-loop control, resulting in the system entering an abnormal state. Controllable state, at this time the torque of the motor is also in a non-controllable state, there are certain hidden dangers

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  • Control system of alternating current permanent magnet synchronous motor
  • Control system of alternating current permanent magnet synchronous motor
  • Control system of alternating current permanent magnet synchronous motor

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Embodiment Construction

[0012] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] figure 1 Shown is a block diagram of the control system of the present invention, which includes one speed closed loop, two current closed loops, and one voltage closed loop. The voltage closed-loop can offset the additional requirement of the stator voltage when the motor is running, so that the stator current regulator does not enter a deep saturation state, and then implements effective closed-loop control of the stator current to improve the controllability of the system.

[0014] figure 1 Among them, ASR is the speed regulator, FG is the current command generator, VR is the vector rotation transformation module, VR -1 It is a vector rotation inverse transformation module, SVPWM is a space vector pulse width modulation module, VSI is a voltage inverter, ɑβ / abc is a Clarke transformation module, and PI is a proportional-integral ...

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Abstract

The invention discloses a control system of an alternating current permanent magnet synchronous motor. The control system comprises a speed regulator, a current command generator, a vector rotation transformation module, a vector rotation inverse transformation module, a space vector pulse width modulation module, a Clarke transformation module, a voltage inverter, a three-phase motor, a position sensor, a speed calculator and a proportional-integral controller; wherein the current command generator comprises a pre-processing module, an optimized control strategy module, a current limit value calculation module and the proportional-integral controller. By virtue of the control system disclosed by the invention, the disturbances on change in parameters including the direct current voltage, the motor stator resistance, inductance and the like can be effectively inhibited, the stator current of motor can be under control and the operational reliability and stability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a control system of an AC permanent magnet synchronous motor. Background technique [0002] AC permanent magnet synchronous motor is adopted by more and more industries due to its high efficiency and good speed regulation performance. The speed regulation of AC permanent magnet synchronous motor mainly adopts frequency conversion speed regulation. With the change of the output power, the active power absorbed by the system from the grid also changes accordingly, always maintaining a high operating efficiency, and the speed regulation performance is also the best. At present, after the AC permanent magnet synchronous motor powered by voltage-type inverter works in the high-speed area, since the stator voltage is close to the limit, the current regulator may be saturated so that the current is under open-loop control, resulting in the system entering an abnormal state. In the contr...

Claims

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Application Information

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IPC IPC(8): H02P21/00
Inventor 施颖
Owner 江苏华晟知识产权运营有限公司
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