“…The classic four quadrants H bridge topology circuit is applied in many situations including DC-AC/AC-DC power supply, DC-DC switching power supply, electromagnetic actuator, DC electromagnetic levitation system (EMLS), DC motor speed control, etc., because of its excellent performances in adjusting the magnitude and polarity of the output voltage and current. Then, based on the four-quadrant H bridge circuit topology, a kind of H-half Bridge DC-DC converter working in 1 st and 4 th quadrant was presented in literature [1,2]. As shown in Fig.…”