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Brushless DC motor (BLDCM) sensorless driving technology is becoming increasingly established. However, optimal phase correction still relies on complex calculations or algorithms. In finding the correct commutation point, the problem of phase lag is introduced. In this paper, we extract DC bus current information for auto-calibrating the phase shift to obtain the correct commutation point and optimize...
A strobe method to control LED lighting source for machine vision inspection is a better design than that of traditional method that let LED always ON but adjustable brightness. A successful image processing depends on whether can retrieve a clear image which is the key work of the image processing. This paper introduces how to design a well strobe controller, to optimize the strobe control strategy...
Food processor requires wide range of variable speed response. Going on the trend of energy saving and carbon reduction, household and commercial using of food processor operation efficiency be much more paid attention to. At the present stage, food processor is mainly with UM and IM. While the operating efficiency and noise cause users must find new solution. Energy conservation, high efficiency...
Brushless DC motor is a high efficiency energy saving motor, requires Hall sensors for commutation. But Hall sensor can't operate in any high temperature or high noise place, so need change to sensorless drive. The sensorless drive technology becomes more and more mature, in which the most widely used technique is the direct BEMF detection. Direct BEMF detection usually use hardware low pass filter...
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