Commutation driving circuit of ring winding permanent magnet brushless DC motor

A technology of permanent magnet brushless DC and ring winding, which is applied in the direction of electronic commutator, etc., can solve the problems of less application of brushless DC motor, limited commutation torque ripple suppression effect, increased complexity of drive circuit, etc., and achieves saving The effect of removing the current detection link, reducing the impact of the circuit, and improving the torque density

Inactive Publication Date: 2016-04-20
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the commutation performance of the brushless DC motor, it is necessary to control the input current of each phase, which increases the complexity of the drive circuit and has limited suppression effect on the commutation torque ripple
Therefore, when the torque performance is high, the application of brushless DC motor is less

Method used

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  • Commutation driving circuit of ring winding permanent magnet brushless DC motor
  • Commutation driving circuit of ring winding permanent magnet brushless DC motor
  • Commutation driving circuit of ring winding permanent magnet brushless DC motor

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing of description and specific embodiment:

[0020] The invention provides a commutation drive circuit of a ring-winding permanent magnet brushless DC motor, which includes a commutation winding and a switch circuit in which multiple phases are connected in series to form a closed loop. The switch circuit includes a plurality of parallel switch bridge arms, a parallel switch The number of bridge arms is equal to the number of phases of the motor. Each switch bridge arm is composed of two power switches connected in series. Both ends of the switch bridge arm are respectively connected to the positive and negative poles of the DC power supply. state of the switch arm midpoint. As shown in the figure, in the specific embodiment 1, a ring-winding brushless DC motor with 12-phase windings is used. The windings of each phase of the motor are connected end to end, and are connected to t...

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Abstract

The invention provides a commutation driving circuit of a ring winding permanent magnet brushless DC motor. A power switch in the next state is conducted and a power switch in the previous state is disconnected simultaneously, or the two power switches are simultaneously conducted within a quite short period of time; diodes provide a freewheeling path in commutation; commutation windings quickly change direction under the effect of DC side voltage; and the commutation moment is the moment when the induced electromotive force of the windings is zero, and then the output torque of the motor is the maximum output torque. The commutation driving circuit is high in commutation speed and suitable for the situations of relatively high frequency of commutation, such as a multipolar motor or a high-speed motor.

Description

technical field [0001] The invention belongs to the field of high-power electric drive, and in particular relates to a commutation drive circuit and a commutation method of a ring winding permanent magnet brushless DC motor. Background technique [0002] In order to ensure that the direction of the electromagnetic torque is always constant, the current in the motor conductor must change direction at the same time as the polarity of the magnetic pole where it is located. The applied voltage of the DC motor is applied to the coil through the connection of the brush and the commutator, and the direction of the coil current is changed through mechanical commutation. By increasing the number of coils connected in series in the armature winding, the torque ripple of the DC motor will be greatly reduced. Therefore, the DC motor has the advantages of good speed regulation performance and small torque ripple. However, the structure of the mechanical commutator is complex, and if th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/14
CPCH02P6/14
Inventor 程思为王东林黄达贾喆武聂子玲郭云珺陈璐珈陶涛王钰
Owner NAVAL UNIV OF ENG PLA
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