On the basis of improving conventional switch table of direct torque control system, a two-hysterics control switch table is established in the strategy in order to decrease torque ripple.

• 该方法在对传统直接转矩控制的开关控制表进行改进的基础上，建立了新型双层滞环控制的开关控制表，使感应电动机的转矩脉动达到最小。