An Efficient Light Load Operation with Faster Transient Response of Very High Frequency Resonant Boost Converter

Abstract

With many versions of inverters available, a control of VHF resonant boost dc-dc converter is described in this paper. Though, a Class- Φ inverter is well documented in the literature, this is a new version and also coupled to resonant rectifier. The twin aspect of any design of resonant boost topology is to feature low device voltage stress and to have high efficiency over wide range of loads. Increased switching frequency allows smaller passive components of small size, allowing one to use air-core magnetic, and thereby reducing core loss. The output is regulated by the MPPT controller. The converter achieves higher than 87% efficiency at nominal input and output voltages, and maintains a good efficiency down to 5%of full load. Resonant gate drive schemes suitable for VHF operation that provides rapid start-up and low-loss operations. Both the converters regulate the output using higher bandwidth, ON–OFF hysteretic control, that enable fast transient response and efficient light-load operation.  The performance analysis was carried out on the MATLAB/Simulink platform and performance characteristics are presented along with the values of components.

Keywords Class-E inverter; class-Φ inverter; harmonic peaking; resonant boost converter; resonant dc–dc converter; resonant rectifier; a MPPT controller; Zero-Voltage-Switching topology (ZVS).