A New Negative Output Buck-Boost Converter with Wide Conversion Ratio

DC-DC converters have been applied to industrial applications widely during the past few decades. With rapid development of technology, negative output (N/O) dc-dc converters play an important role in the industrial fields, such as regenerative braking system (RBS) of DC motors for hybrid electric vehicles, signal generator and data transmission interface, neutral point clamping power electronics systems, wind power generation and photovoltaic power generation. As well known, the buck-boost converter and Cuk converter are two typical traditional N/O converters, and their voltage conversion ratios are same. They can generate a higher or lower output voltage value than the input voltage.