Research of Position Detection Technology of Brushless DC Motor with Back-EMF Integration Method
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Graphical Abstract
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Abstract
The paper put forward a control scheme of brushless DC motor with sensor-less.The scheme uses back-EMF integration method to obtain the signal of rotor position,compensates phase shift of the back-EMF detecting citcuit under different speed,and realizes synchronous starting in open-loop of brushless DC motor through increasing frequency and increasing voltage method,so as to realize the control of sensor-less of brushless DC motor.The experiment results showed that the scheme is correct.
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