By Luo F.L., Ye H.
There are a number of households of DC/DC converters comprising 1000s of other topologies. Sorting in the course of the quite a few houses and features is clearly a frightening activity. Culled from the pages of the groundbreaking complex DC/DC Converters, this booklet presents a targeted, concise assessment of greater than 50 topologies of multi-quadrant converters. All points of those topologies are illustrated via designs built by way of the authors over the years. The booklet starts off with multiple-quadrant converters by means of switched part (SC and SI) converters, multiple-lift push-pull switched-capacitor converters, and eventually, multiple-quadrant soft-switching converters.
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Additional resources for Advanced Multi-Quadrant Operation DC/DC Converters
1 Circuit Description When switch S2 is off, source current i1 = 0. Current iL1 ﬂows through the switch S2 and capacitor C, and increases. Current iL1 ﬂows through the switch S2, and increases. When switch S2 is off, the source current i1 = iL1 + iL2. The free-wheeling diode D1 is conducted. Both currents iL1 and iL2 decrease. Inductor L1 transfers its stored energy to capacitor C. In the mean time current iL2 ﬂows through the source V1. 3c. 3a and b. Actually, the variations of currents iL1 and iL2 are small so that iL1 ª IL1 and iL2 ª IL2 The charge on capacitor C increases during switch off and on: Q+ = (1 – k)T IL2 Q– = kTIL1 In a whole period investigation, Q+ = Q–.
V1 and I2 are positive, and I1 and V2 are negative. Each mode has two conditions: V1 > V2 and V1 < V2. Each condition has two states: on and off. Usually, each state operates in a different conduction duty k. The switching period is T where T = 1/f. 5. 5. Since V1 > V2 two capacitors C1 and C2 can be used in parallel. During switch-on state, switches S1, S4, S6, and S8 are closed and other switches are open. In this case capacitors C1//C2 are charged via the circuit V1–S1–C1//C2–S4, and the voltage across capacitors C1 and C2 is increasing.
In this case capacitors C1 and C2 are discharged via the circuit S2–V2–S4–C1–S7–C2, and the voltage across capacitor C1 and C2 is decreasing. Capacitors C1 and C2 transfer the energy from the source to the load. 6c. 7. Since V1 > V2 two capacitors C1 and C2 are in parallel during switch-on and in series during switch-off. The voltage lift technique is applied. During switchon state, switches S2, S4, S6, and S8 are closed. 6 Mode A2 (quadrant I) forward motoring operation with V1 < V2. capacitors C1 and C2 is increasing.