| Title |
Robust Double Deadbeat Control of Single - Phase UPS Inverter |
| Authors |
Jee-Ho Park ; Tae-Won Heo ; In-Mo Ahn ; Hyun-Woo Lee ; Jae-Roun Jung ; Jung-In Woo |
| Abstract |
This paper deals with a novel full digital control of the single-phase PWM(Pulse Width Modulation) inverter for UPS(Uninterruptible Power Supply). The voltage and current of output filter capacitor as a state variable are the feedback control input. In the proposed scheme, a double deadbeat control consisting of minor current control loop and major voltage control loop have been developed. In addition, a second order deadbeat current control which should be exactly equal to its reference in two sampling time without error and overshoot is proposed to remove the influence of the calculation time delay. The load current prediction is achieved to compensate the load disturbance. The simulation and experimental result shows that the proposed system offers an output voltage with THD(Total Harmonic Distortion) less than 5% at a full nonlinear load. |