半桥拓扑双凸极电机相电流的检测与控制

Double salient electro-magnetic motor current detector and control by half-bridge converter

针对三相半桥拓扑常规相电流检测与控制都是在双凸极电机每相绕组上分别采用一个电流检测器,使得系统结构复杂,因而限制了半桥拓扑系统的发展,提出了半桥拓扑电励磁双凸极电机相电流检测与控制的新思路。采用将双向电流分解控制的方法,设计了半桥拓扑电励磁双凸极电机调速系统,为半桥拓扑的应用开辟了一个新的途径。在阐述了系统各部分实现原理的基础上,进行了仿真分析与试验验证。仿真与试验均表明,该控制思路的提出可使系统结构简单、控制灵活,不仅克服了常规相电流检测与控制的复杂性,而且也发挥了全桥电路所不可比拟的优越性。

A current detector is used on each-phase winding of double salient electro-magnetic motor by half-bridge circuit. The phase-current double polarity makes the system structure complex, so the development of half-bridge circuit is limited. This paper briefly introduced a new method of phase-current detector on double salient electro-magnetic motor by half-bridge converter. At the same time, speed-controlling system is designed. It offers a new means of the application of double salient electro-magnetic motor speed-controlling system. On the basis of the theory, we carry out simulating analysis and experimentation on this system. Simulation and experimentation prove that the system is simple and convenient in control. It not only gets rid of the complexity on phase-current detector and control by half-bridge converter as usual, but also has an advantage over full-bridge converter.