开关磁阻起动/发电机控制方法研究

Control of Switched Reluctance Starter/Generator

根据磁阻效应产生电磁转矩的机理 ,提出开关磁阻起动 /发电机相电流斩波和角度位置控制方法 ,通过调节相电流斩波限及关断延时、相绕组开通励磁及关断续流相对位置 ,就可控制起动转矩和发电电压 .不同控制参数的数值仿真分析和样机实测表明 :对于低速起动状态 ,相电流斩波限配合固定关断延时可实现有效的恒转矩起动控制 ;对于高速起动状态 ,调节相绕组开通及关断位置角可实现恒功率起动控制 ;对于发电状态 ,依据原动机转速和负载变化的具体情况 ,同时或单独调节相电流斩波限及相绕组开通、关断的位置角 。

Some control methods for phase current chopping and the position of phase winding in turn-on and turn-off switched reluctance starter/generator are proposed, through which the starting torque and generating voltage can be regulated by changing control parameters of phase current chopping level, fixed turn-off delay time, and turn-on and turn-off position relative to rotor tooth. Numerical simulation of phase current of different control parameters are in good agreement with the test results of prototype manufactured. It was found that the effective starting control of constant torque was achieved by fixing the chopping level and turn-off delay time under condition of low speed starting, and constant power starting control was also realized by regulating the turn-on and turn-off position under high speed starting condition. It was also found that the steady state generating voltage qualities and transient response could be improved effectively by adjusting the copping level and turn-on/turn-off position simultaneously or singly according to the factual changing speed of prime mover and the changing load.