By Luo F.L., Ye H.
There are numerous households of DC/DC converters comprising enormous quantities of alternative topologies. Sorting throughout the a number of houses and features is clearly a frightening job. Culled from the pages of the groundbreaking complicated DC/DC Converters, this booklet offers a centred, concise review of greater than 50 topologies of multi-quadrant converters. All features of those topologies are illustrated via designs built through the authors over the years. The e-book 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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Extra resources for Advanced Multi-Quadrant Operation DC/DC Converters
Capacitor C acts as the primary means of storing and transferring energy from the load battery to the source via inductor L2. , vC(t) ª VC, even though it stores and transfers energy from the load V2 to the source V1. 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.
13) Where iL is the average input current in the switch-on period kT that is equal to IL/k, and i H is the average output current in the switch-off period (1 – k)T that is equal to IH/3(1 – k). Therefore, we have 4IH = IL. 3. From this analysis, it can be seen that the transfer efﬁciency only relies on the ratio of the source and load voltages, and it is independent of R, C, f, and k. The conduction duty k does not affect the power transfer efﬁciency. It affects the input and output power in a small region.
The high voltage (HV) source and low voltage (LV) load are usually constant voltages. The load can be a battery or motor back electromotive force (EMF). For example, the source voltage is 48 V and load voltage is 14 V. There are two modes of operation: 1. Mode A (quadrant I): electrical energy is transferred from HV side to LV side; 2. Mode B (quadrant II): electrical energy is transferred from LV side to HV side. 1 Circuit Description Each mode has two states: on and off. Usually, each state operates in different conduction duty k.