Because the most torque an electric motor has is at zero speed.
因为电动马达的最大力矩处于零速度。
This paper presents a novel open-loop speed control method for induction motors that provides high output torque and nearly zero steady-state speed error at any frequency.
提出了一种新颖的感应电机开环速度控制法，在任一频率下，它不但能使电机输出高的力矩，而且使稳态速度误差几乎等于零。
Especially in the car at zero speed start, but also shows that the higher torque of the advantages of upgrading fast.
尤其在轿车零速启动时，更显示出扭矩高者提升速度快的优越性。
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