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SPWM逆变电源输出变压器直流不平衡问题 被引量:15
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作者 杨荫福 周党生 +1 位作者 刘晶波 李勋 《华中理工大学学报》 CSCD 北大核心 1999年第6期72-73,109,共3页
M分析了导致SPWM逆变电源输出变压器直流不平衡的几种主要因素——控制系统造成的直流分量、脉冲分配及死区引起的直流分量和主电路引起的直流分量.在此基础上提出了两种相应的对策——静态补偿和适时补偿.实验证明,所提方案简... M分析了导致SPWM逆变电源输出变压器直流不平衡的几种主要因素——控制系统造成的直流分量、脉冲分配及死区引起的直流分量和主电路引起的直流分量.在此基础上提出了两种相应的对策——静态补偿和适时补偿.实验证明,所提方案简单有效。 展开更多
关键词 SPWM 逆变器 变压器 偏磁 直流不平衡
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Optimal design of auxiliary-teeth to solve circulation current reduction of permanent magnet linear synchronous motor 被引量:1
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作者 JANG Ki-bong KIM Jee-hyun +1 位作者 AN Ho-jin KIM Gyu-tak 《Journal of Central South University》 SCIE EI CAS 2011年第3期690-696,共7页
A discontinuity of magnetic circuits according to the end effect is generated in the permanent magnet linear synchronous motor (PMLSM). Due to the unbalanced back electro-motive force (EMF) and impedance produced,... A discontinuity of magnetic circuits according to the end effect is generated in the permanent magnet linear synchronous motor (PMLSM). Due to the unbalanced back electro-motive force (EMF) and impedance produced, unbalanced current is generated. The cireulatin8 current, which is caused by a decrease in the thrust, is generated by the unbalanced current. The optimal design of auxiliary-teeth at the end of the mover was carried out to solve the unbalance of phase by using design of experiment (DOE), and compared with the basic model through finite element analysis (FEA). As a result, the auxiliary-teeth model compensates for the decrease of thrust caused by the unbalanced phase. Also, this model is proven to reduce the detent force by the vibration and noise of the PMLSM and copper loss caused by the circulating current. 展开更多
关键词 permanent magnet linear synchronous motor auxiliary-teeth circulation current end effect thrust reduction
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