This method that more voltage vector chosen in per controlling period is integrated to target voltage vector according to torque, flux and speed increase number of voltage vector of system and apply more simple modulation method.

• 即根据转矩、磁链误差和速度的不同，在每个控制周期内选取多个电压矢量来合成目标电压矢量，增加电压矢量的数目，并采用更为简单的调制方法进行脉宽调制，从而大大降低转矩、电流和磁链的波动，使系统在低速时的转矩更平稳、性能更佳。