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Multi-phase brushless direct current motor and driving method thereof

A brushed DC motor and drive module technology, which is applied in the direction of DC motor rotation control, DC motor speed/torque control, AC motor control, etc., can solve the problems of multiple power consumption and noise, and achieve the effect of simple algorithm

Inactive Publication Date: 2016-02-17
刘振韬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in this case, the output of the inverter can only be a sinusoidal voltage or current, and the DC brushless motor driven by this voltage or current will cause excessive power consumption and audible noise

Method used

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  • Multi-phase brushless direct current motor and driving method thereof
  • Multi-phase brushless direct current motor and driving method thereof
  • Multi-phase brushless direct current motor and driving method thereof

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Embodiment Construction

[0029] The three-phase brushless DC motor of the preferred embodiment of the present invention has a structure such as figure 2 As shown, three H-bridge single-stage inverters are used to drive a three-phase brushless DC motor, and this motor is configured with three sets of independent phase coil windings 1 with no common terminals, so that all windings use smooth pure sine Wave to drive, so that the motor phase coil winding 1 has the minimum power harmonics, to achieve the maximum drive efficiency. In addition, the motor uses a powerful high-speed FPGA to simultaneously drive three H-bridge single-stage inverters.

[0030] The H-bridge single-stage inverter in the preferred embodiment of the present invention has a structure such as image 3 As shown, it is driven by four gates g1, g2, g3 and g4 to output the motor drive signal V AB . In order to achieve the best switching efficiency, all inverters are driven with gate signals and run in single-stage mode, such as Figu...

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Abstract

The invention relates to a multi-phase brushless direct current motor and a driving method thereof. A driving module in the motor comprises a controller, H-bridge single-stage inverters of all phases and independent phase coil windings (1) which are sequentially and electrically connected. The method comprises the steps that 1, the controller outputs pulse width-modulated sine waves with the same frequency and amplitude to drive the H-bridge single-stage inverters of all the phases respectively, the pulse width-modulated sine waves corresponding to every two adjacent phase coil windings have a non-zero phase difference, and the phase differences are same; 2, the H-bridge single-stage inverters of all the phases output sine wave driving voltage or sine wave driving currents of the corresponding phases to the corresponding electrically-connected independent phase coil windings. According to the multi-phase brushless direct current motor and the driving method thereof, perfect sine voltage or current driving can be achieved, therefore, the efficiency is improved, and the noise is reduced.

Description

technical field [0001] The invention relates to a brushless direct current motor, in particular to a multi-phase brushless direct current motor and a driving method thereof. Background technique [0002] Compared with other motors, brushless DC motors have two advantages of energy saving and high reliability, and are becoming more and more popular. Single-phase DC drive is realized by a single H-bridge inverter with a Hall-effect sensor. In addition, traditional three-phase DC motors, whether sensor-based or sensorless, are usually driven by three half-bridges whose phase coil windings generally Using a star connection, such as figure 1 As shown, the three phase coil windings 1 have common terminals. Trapezoidal, sinusoidal, and field oriented control are the most common methods of commutation. But in this case, the output of the inverter can only be a similar sinusoidal voltage or current, and the DC brushless motor driven by this voltage or current will cause excessive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/29
CPCH02P7/29H02P7/292H02P2209/05H02P2209/11Y02P80/10H02P6/08H02P27/08H02P7/03H02P7/04H02P6/00H02P6/085
Inventor 刘振韬
Owner 刘振韬