基于单桥臂励磁控制的可变磁通磁阻电机控制系统

Variable Flux Reluctance Machine Control System Based on Single Leg Excitation Current Control

提出一种基于单桥臂励磁控制的可变磁通磁阻电机(variable flux reluctance machine,VFRM)控制系统,与基于H桥控制励磁电流的VFRM控制系统相比,使用的开关器件少,在降低成本的同时也降低逆变器的损耗。基于单桥臂励磁控制的VFRM控制系统中的励磁电流通过电枢绕组中性点与第四桥臂,通过拉格朗日乘数法求得励磁电流和交轴电流最优分配。最后,对比了单桥臂励磁控制和H桥励磁控制的VFRM控制系统的损耗、效率等。结果表明,在相同的转矩和转速条件下,与H桥励磁控制的VFRM控制系统相比,逆变器损耗降低了50%,效率升高3.3%。

A variable flux reluctance machine(VFRM)control system based on the excitation current control of a single leg was proposed.Compared with the VFRM control system based on the H-bridge which controlling the excitation current,fewer switch devices were used,in which the cost of the inverter was reduced while also the loss of the inverter reducing.In the VFRM control system based on single-leg excitation current control,the excitation current passed through the neutral point of the armature windings and the fourth leg,the optimal distribution of excitation current and q axis current by Lagrange multiplier method was obtained.Finally,the loss and efficiency of the VFRM control system of single leg excitation current control and H-bridge excitation control were compared.The results show that,under the same torque and speed conditions,compared with the VFRM control system based on H-bridge excitation control,inverter losses are reduced by 50%,and efficiency is increased by 3.3%.