Being based on the steady state equations of the motor for the design of VSVF, VSVF can control the torque to a certain extent, but it can not implement the real control in the dynamic process.

• 转差频率控制能够在一定程度上控制电机的转矩，但它是以电机的稳态方程为基础设计的，并不能真正控制动态过程中的转矩。