Low Current Ripple, High Efficiency Boost Converter with Voltage Multiplier

An innovative high voltage-gain boost converter, which is made for home inverters contains the combination of switched capacitors and coupled inductors made a voltage multiplier, which is used to increase the output gain of a traditional converter abnormally without using an excessive switching frequency. The setup not only maximizes the efficiency but also eliminates input current ripple almost, which deduces conduction losses and current stress of switches causes to greater extension of input source lifetime. In addition, due to the lossless passive clamp performance, leakage energy is recycled to the output terminal. Hence, large voltage spikes across the main switches are alleviated, and the efficiency is improved. Even the low voltage stress makes the low-voltage-rated MOSFETs be embraced for reductions conduction losses and expense. Ultimately, the prototype circuit with 24-V input voltage, 230-V output, and 1000-W output power is operated to verify its performance. The greatest effectiveness is 97.1 %.