步进电动机的失调角及精度

步进电动机象同步电动机一样,在负载转矩的作用下,转子磁极中心线将滞后于气隙磁场的中心线一个角度,称为失调角。在开环控制系统中,负载失调角对应于一定的失动量。用脉冲当量来衡量失动量的值时,它与电动机的通电方式,主要是逻辑通电状态数,即通常所说的运行拍数有关。由此明确了微步驱动技术在开环控制系统中应用的局限性。

ANGULAR DISPLACEMENT AND ACCURACY OF STEPPING MOTOR

Like synchronous motor, rotor magnetic pole center line could lagged behind an angle of that of air-gap magnetic field under the function of load torque(called angular displacement).In the system of open-loop control, load angular displacement corresponds for certain missing momentum.When value of missing momentum is measured by pulse equipment, it is related to electrified form of motor, mainly logic electrified state parameter,est operating mumber of beats. But it is clear that micro step drive technique has certain limit in the open-loop conttol system.