HEF4752 takes on another important role in this design, it produces the three-phase SPWM wave signal, this signal actuates the invertor to cause it to have the symmetrical three-phase output.

• HEF4752在本设计中担当另一个重要的角色，它产生三相SPWM波的信号，该信号去驱动逆变器使之产生对称的三相输出。