CAJ | 학술논문

传统无刷直流电动机的六拍控制采用 Y 型绕组连接方式，将三相绕组中的两个导通相串联进行供电；其无传感器控制所需的位置信息通过检测未导通相的反电动势过零点得到。绕组串联连接使每一相仅利用母线电压的一半产生电流；同时 Y 型绕组结构使未导通相受到中性点电压的影响造成位置信号检测精度降低。该文将三相 H 桥结构应用于无刷直流电动机的无位置传感器控制，使三相绕组中参与导通的两相并联进行供电，同时使未导通相切出电路以进行反电动势过零点检测。绕组并联连接使每一相利用全部母线电压产生电流，电压利用率得到提高；同时未导通相完全切出电路使位置信号检测精度提高。对三相 H 桥无刷直流电动机无位置传感器控制方法进行了数学推导和分析，并在一台小电感样机上进行了实验，实验结果显示，该4对极样机可以在20000 r/min的转速下实现无位置传感器控制。
전통무쇄직류전동궤적륙박공제채용 Y 형요조련접방식，장삼상요조중적량개도통상천련진행공전；기무전감기공제소수적위치신식통과검측미도통상적반전동세과영점득도。요조천련련접사매일상부이용모선전압적일반산생전류；동시 Y 형요조결구사미도통상수도중성점전압적영향조성위치신호검측정도강저。해문장삼상 H 교결구응용우무쇄직류전동궤적무위치전감기공제，사삼상요조중삼여도통적량상병련진행공전，동시사미도통상절출전로이진행반전동세과영점검측。요조병련련접사매일상이용전부모선전압산생전류，전압이용솔득도제고；동시미도통상완전절출전로사위치신호검측정도제고。대삼상 H 교무쇄직류전동궤무위치전감기공제방법진행료수학추도화분석，병재일태소전감양궤상진행료실험，실험결과현시，해4대겁양궤가이재20000 r/min적전속하실현무위치전감기공제。
The traditional six-step control method of the brushless DC motor (BLDCM) adopts Y-connection windings to make two conducting phases work in series; the sensorless control of this structure is implemented through detecting the zero-cross point of the non-conducting phase back electromotive force (EMF). Connection in series makes each phase excited with half the potential of bus voltage, and distraction of the neutral point reduces the accuracy of the rotor position signal. To improve these two aspects, the three-phase H-bridge structure has been adopted to BLDCM in this paper. The new structure makes two conducting phases work in parallel; meanwhile the non-conducting phase is cut off from the circuit for back EMF zero-cross detecting. Parallel connection makes each phase excited with full potential of bus voltage, and the non-conducting phase totally switches out from the circuit, which makes the rotor position signal accurate. The theoretical derivation and analysis of the presented method are given. The experimental results of a small inductance prototype with 4 pole pairs shows that the presented sensorless control method could be working well at the speed of 20000r/min.