Permanent magnet brushless direct current motor torque ripple suppression system and method

A permanent magnet brushless DC and pulsation suppression technology, which is applied in the control system, electronically commutated motor control, electrical components, etc., can solve the problems of restricting applications, brushless DC motor torque ripple, etc., and achieve the elimination of commutation torque Pulsating, dramatic effect

Inactive Publication Date: 2013-12-04
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0003] However, the brushless DC motor with two-two conduction mode driven by square wave has the problem of torque ripple, which restricts its application in speed regulation systems requiring low ripple speed and high-precision position servo control systems.

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  • Permanent magnet brushless direct current motor torque ripple suppression system and method
  • Permanent magnet brushless direct current motor torque ripple suppression system and method
  • Permanent magnet brushless direct current motor torque ripple suppression system and method

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] figure 1 It is a schematic diagram of the functional module connection of the permanent magnet brushless DC motor torque ripple suppression system in the embodiment. Such as figure 1 As shown, a permanent magnet brushless DC motor torque ripple suppression system for suppressing the commutation torque ripple of the permanent magnet brushless DC motor 6 includes: Z source network DC power converter 3, inverter 5 , a selector switch 4, a commutation detection module 9, a Hall signal detection module 10, a phase current detection module 8, and a calculation control module 7.

[0015] Among them, the Z-source network DC power converter is used as a commutation auxiliary power supply. It is composed of a power supply, a diode, a switch tube, a virtual load resistor, and a connection circuit of two capacitors and two inductors. The relati...

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Abstract

A permanent magnet brushless direct current motor torque ripple suppression system and a permanent magnet brushless direct current motor torque ripple suppression method which are used for suppressing commutation torque ripple of a permanent magnet brushless direct current motor. According to the permanent magnet brushless direct current motor torque ripple suppression method, a Z source network direct current power converter is adopted to adjust direct current bus voltage which is transmitted to the permanent magnet brushless direct current motor by an inverter in commutation, such that the fall rate of switch-off phase current is equal to the rise rate of switch-on phase current, and therefore, commutation torque ripple can be suppressed or eliminated. The permanent magnet brushless direct current motor torque ripple suppression system and method are advantageous in simplicity and obvious effect.

Description

technical field [0001] The patent of the invention belongs to the technical field of motor control, and proposes a new permanent magnet brushless DC motor (BLDCM) torque ripple suppression system and method. Background technique [0002] With the rapid development of high-performance permanent magnet materials, microelectronics technology, automatic control technology and power electronics technology, especially high-power semiconductor devices, brushless DC motors and their control technologies have developed rapidly. The brushless DC motor uses power tube commutation to replace the mechanical contact device composed of commutator and brush, which has a long service life and safe and reliable operation. Its rotor adopts permanent magnet material, does not need excitation current, and has higher efficiency. The brushless DC motor has large output torque, fast dynamic response, small inertia, high reliability, and simple control, so its application is becoming more and more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00
Inventor 夏鲲杨益华廖新深苗森
Owner UNIV OF SHANGHAI FOR SCI & TECH
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