Instantaneous compensation strategy of DC voltage component in the digital-analog integrated simulation interface

Digital-Analog integrated simulation combines the advantages of digital simulation with the advantages of physical simulation. The applicability of traditional simulation system is increased. The DC component of output voltage restricts the versatility of Digital-Analog integrated simulation. Unlike general inverters, the inverter of Digital-Analog integrated simulation interface (DAISI) has its unique features. A new control strategy is put forward to restrain the steady and transient DC component without additional hardware circuit. The feedback control loop along with the output voltage control loop adjust the duty cycle of sinusoidal pulse width modulation which compensate for the DC voltage component in the DAISI. Simulation and experiment verify the effectiveness of the control strategy.