Driving method of high-power high-speed brushless DC motor controller

A DC brushless, driving method technology, applied in the direction of motor generator control, electronic commutation motor control, control of electromechanical brakes, etc., can solve the problems of complex control software of sine wave drive scheme, and achieve low stray loss and high efficiency , the effect of small switching loss

Active Publication Date: 2011-12-07
HEFEI KERUI ELECTRONICS
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Problems solved by technology

But the control software of the sine wave drive scheme is more complicated

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  • Driving method of high-power high-speed brushless DC motor controller
  • Driving method of high-power high-speed brushless DC motor controller
  • Driving method of high-power high-speed brushless DC motor controller

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Embodiment Construction

[0013] See figure 1 , A driving method of a high-power high-speed DC brushless motor controller, specifically including the following steps:

[0014] (1) Use the pulse width modulation method to drive the motor, in the gap of the pulse width modulation, use the Hall sensor to sample the position information of the motor rotor, and use the method of multiple sampling to reduce the influence caused by interference;

[0015] (2) Use the software to simulate a rotation model, and use the periodic information obtained by the Hall sensor to calculate the rotation speed of the rotation model, and use the separation position information obtained by the Hall sensor to synchronize the phase of the rotation model. Simulate the continuous position information of the motor in order to correctly synchronize the sine wave drive signal;

[0016] (3) Since the motor has inertia during actual operation, the separation position information output by the Hall sensor is less than 1 millisecond when the ...

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Abstract

The invention discloses a method for driving a high power high speed DC brushless motor controller. The method comprises the following steps of: driving a motor by adopting a pulse width modulation method, and sampling the position information of a motor rotor by adopting a Hall sensor in a pulse width modulation interval; detecting the regularity of the position information detected by the Hall sensor, detecting the rotating speed change rate of the motor, and ignoring a detection result if the position information of the Hall sensor is detected to exceed a set range; computing the rotating speed of a rotating model by utilizing periodic information obtained by the Hall sensor, and performing phase synchronization on the rotating model by utilizing separated position information obtainedby the Hall sensor to simulate the continuous position information of the motor. In the method, a sine wave driving scheme is adopted; the method has the advantages of low switching loss, low electromagnetic radiation, high efficiency, high bus voltage utilization rate and the like; and the rotating model has high stability, thereby achieving the high stability, low noise, low stray loss and highefficiency of the motor.

Description

Technical field [0001] The invention relates to the field of DC brushless motor controllers, in particular to a driving method of a high-power high-speed DC brushless motor controller. Background technique [0002] There are two schemes for brushless DC motor drive, square wave drive scheme (120° frequency conversion) and sine wave drive scheme (180° frequency conversion). Square wave drive scheme: The circuit topology is simple, and the control strategy is easy to implement. However, the square-wave-driven motor has large torque fluctuations, poor stability at low speeds, high vibration and noise, and large stray losses such as harmonic losses during high-speed operation, resulting in reduced efficiency. Sine wave drive scheme: the motor runs at low speed and has good stability, low noise, low stray loss at high speed, and high efficiency. But the control software of the sine wave drive scheme is more complicated. [0003] For high-power motor drives, efficiency is a very i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/05
Inventor 高立新鲍健熊鲁源李春英张铄岳丹汪阳
Owner HEFEI KERUI ELECTRONICS
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