CAJ | 학술논문

为了实现无位置传感器无刷直流电机的无反转起动及平滑切换,提出了一种新的无位置传感器无刷直流电机起动及切换方法.该方法依据电机定子铁芯饱和效应,采用6个短时电压脉冲检测转子初始位置,可将转子定位在60°范围内,然后采用长短电压脉冲相结合的方式加速电机同时利用电流响应的变化动态检测转子位置,当转速上升到可以检测到反电势过零点时,关闭电机驱动电路,根据端电压波形和导通相之间的对应关系确定切换时刻,可将电机平滑切换至反电动势换相运行方式.样机试验结果验证了上述方法的可行性和有效性.
위료실현무위치전감기무쇄직류전궤적무반전기동급평활절환,제출료일충신적무위치전감기무쇄직류전궤기동급절환방법.해방법의거전궤정자철심포화효응,채용6개단시전압맥충검측전자초시위치,가장전자정위재60°범위내,연후채용장단전압맥충상결합적방식가속전궤동시이용전류향응적변화동태검측전자위치,당전속상승도가이검측도반전세과영점시,관폐전궤구동전로,근거단전압파형화도통상지간적대응관계학정절환시각,가장전궤평활절환지반전동세환상운행방식.양궤시험결과험증료상술방법적가행성화유효성.
In order to start up the brushless DC motor (BLDCM) without reverse rotation and smoothly switch the running state of the motor, a novel startup and smoothly switching method for a sensorless BLDCM is presented. Based on the saturation effect of the stator iron, six short voltage pulses are applied to determine the initial rotor position and the rotor can be found within 60°. After that, a series of short and long voltage pulses are used to accelerate the motor and the variation of the response current is utilized to detect the rotor position dynamically. When the motor reaches a certain speed at which the back-electromotive force (EMF) method can be applied, all the power devices are turned off and the running state of the motor is smoothly switched at the moment determined by the relationship between the terminal voltage waveform and- the commutation phases. The experimental results verify the feasibility and validity of the proposed method.