直流电机起动的变分与能效仿真

Variational and Energy Efficiency Simulation of DC Motor Starting

为了提升直流电动机起动效率,对其起动进行变分,得到唯一的转速下凹抛物极值轨线。通过仿真比较,验证此为最低能效的轨线。故而考虑其他几种起动轨线以寻找出能效最优的轨线,尤其是与变分极值轨线相对偶的凸抛物轨线,经仿真验证其为高能效轨线。另外经仿真验证,恒定高电流的简单起动方法也可以进一步提升效率。

In order to improve the energy efficiency of DC motor starting,the unique rotational speed extremum trajectory in the shape of concave parabola was obtained by using variational method.Simulation verified that the energy efficiency extremum of this was the lowest.To find the optimal energy efficiency trajectory,several other starting trajectories were considered,especially the convex parabola trajectory relative to the variational extremum trajectory,which was proved to have a higher energy efficiency.The simulation also proved that the simple starting method with a constant high current could further improve the energy efficiency of DC motor starting.