Hexaphase brushless dc motor controller

Abstract

The invention discloses a six-phase DC brushless motor controller which comprises a three-phase full-bridge switch circuit I, a three-phase full-bridge switch circuit II, a driving circuit I, a driving circuit II, a speed input detection circuit, a voltage detection circuit, an over-current detection circuit, a Hall signal detection circuit I, a Hall signal detection circuit II and a single chip microcomputer. The speed input signal is transmitted from the speed input detection circuit to the single chip microcomputer for signal processing and then is transmitted to the driving circuit I and the driving circuit II. The driving circuit I and the driving circuit II control the three-phase full-bridge switch circuit I and three-phase full-bridge switch circuit II, to drive the windings inside the six-phase DC brushless motor to run the motor. Compared with the prior three-phase DC brushless motor controller, the six-phase DC brushless motor controller can reduce the torque ripple of the motor by 50% and greatly reduce the noise. Additionally, under the condition of the same output power, the current of each winding is reduced by 50%, thereby the product reliability is improved.

Description

technical field [0001] The invention relates to a six-phase DC brushless motor controller. Background technique [0002] Due to its high reliability, brushless DC motors are widely used in electric vehicles such as electric bicycles, electric tricycles, and electric four-wheelers. However, the existing three-phase DC brushless motor will generate a pulsating torque as high as 50% of the rated torque during phase commutation, and the user's riding experience is that the vibration and noise are relatively large. In the case of not changing the motor, the method of overlapping commutation is used to solve the torque ripple caused by commutation. Although it can be improved to a certain extent, the user still feels that it is relatively large, especially in the process of starting at low speed. It is determined by the technical scheme of the three-phase DC brushless motor itself, so the effect of further improvement is limited. In addition, with the increase of motor power, th...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a six-phase DC brushless motor controller for the problems that the existing DC brushless motor controller cannot meet the control requirements of the six-phase DC brushless motor.

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