From left to right, alternating current is converted, and the voltage measurement module gets Un, which has a comparative relationship with the reference voltage estimation. The transient current control module is estimated to have PID control, so you have to study the formula of transient current control. The output Uab is sent to SPWM (sinusoidal pulse width modulation), and the modulation signal is sent to G pin as the driving signal. The two capacitors after rectification should have the function of stabilizing voltage. I also forgot to output three-phase electricity A, B and C through the inverter bridge. The indirect vector control module here also needs to know the specific formula. SVPWM is space vector pulse width modulation, and the output driving signal is sent to G pin of inverter bridge to trigger inverter.