Abstract
High boost DC/DC voltage conversion is always indispensable in a power electronic interface of certain battery-powered electrical equipment. However, a conventional boost converter works for a wide duty cycle for such high voltage gain, which increases power consumption and has low reliability problems. In order to solve this issue, a new battery-powered combined boost converter with an interleaved structure consisting of two phases used in automotive audio amplifier is presented. The first phase uses a conventional boost converter; the second phase employs the inverted type. With this architecture, a higher boost voltage gain is able to be achieved. A derivation of the operating principles of the converter, analyses of its topology, as well as a closed-loop control designs are performed in this study. Furthermore, simulations and experiments are also performed using input voltage of 12 V for a 120 W circuit. A reasonable duty cycle is selected to reach output voltage of 60 V, which corresponds to static voltage gain of five. The converter achieves a maximum measured conversion efficiency of 98.7% and the full load efficiency of 89.1%.
Highlights
To provide an appropriate solution, in this study, we introduce a combined boost converter topology
The converter works in continuous conduction mode (CCM)
6. total has the same performance as the variation the duty in cycle of the current ripple to inductor current ripple as a function two-phase interleaved boost converter, and that is superior to the conventional boost converter
Summary
High boost DC/DC (direct current to direct current) voltage conversions are indispensable in a power electronic interface of certain low-voltage DC-powered electrical devices, including audio amplifiers [1,2,3,4,5,6,7], high intensity discharge (HID) lamps [8,9,10,11,12,13,14], uninterruptible power supplies (UPS) [15,16,17,18,19], and electric vehicle systems [20,21,22,23,24,25,26,27,28,29,30,31,32]. Franceschini et al presented a DC/DC boost converter topology that is a full-bridge architecture using a three-phase transformer and is well suitable for high-power applications with battery supplies [5]. Divakar et al introduced a circuit that can eliminate one auxiliary winding and can reduce the voltage on the primary side improved with the relative low-cost components, the input current ripple is large owing to the fact switch. In order to further decrease the voltage exceeding duty cycles can be prevented, the input current ripple is large because of its stress on active switches and electromagnetic interference (EMI), Lai presented a high boost converter single-phase operation makes the converter not suitable for high current and low ripple consisting of three-phase circuits by an auxiliary forward circuit [19].
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