Double-Input Triple-Output Non-Isolated DC-DC Converter Based on
Coupled-Inductor with High Stepped-Up Output Voltages
Abstract
This paper introduces a new non-isolated double-input
triple-output (DITO) high voltage gain DC-DC converter with a wide range
of applications, including hybrid voltage source systems, solar home
appliances, dc bus power distribution systems, and electrical vehicles
(EV). The proposed DITO converter interfaces two hybrid voltage sources
to supply three different output loads with varying voltage and power
levels. Compared to conventional converters of the same type, the
proposed DITO converter offers several advantages, including operation
for all duty cycles, integration of hybrid energy sources to transfer
power to multiple loads, high voltage conversion ratio for all three
output ports, a higher ratio of total voltage gain to total components
number, common grounded input and output DC ports, simultaneous DC
voltage regulation of three output ports by tuning separate controlling
parameters of duty cycles, an additional turn ratio of coupled inductors
to increase the voltage gain of output ports, and medium voltage stress
on switches. The proposed DITO converter utilizes a new single-switch
single-coupled-inductor DC-DC structure, which is analyzed and verified
through a prototype implementation for 25V and 30V input voltages and
210V, 330V, and 400V output voltages with a total power of 480W. The
experimental results confirm the simulation results and theoretical
analysis.
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