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A Composite DC-DC Converter Based on the Versatile Buck-Boost Topology for Electric Vehicle Applications
Catalina González-Castaño1, Carlos Restrepo2, Freddy Flores-Bahamonde1
1Department of Engineering Sciences, Universidad Andres Bello, Santiago 7500971, Chile.
Sensors (Basel, Switzerland)
|July 27, 2022
Summary
A novel versatile buck-boost converter enhances electric vehicle efficiency by enabling wide voltage range DC link regulation. This composite converter design shows superior performance over traditional types in simulations and experiments.
Area of Science:
- Electrical Engineering
- Power Electronics
- Electric Transportation
Background:
- Composite converters integrate high-efficiency modules for advanced power conversion.
- Electric vehicles require wide DC link voltage ranges to optimize motor efficiency.
Purpose of the Study:
- To propose and evaluate a versatile buck-boost DC-DC converter for electric vehicle composite architectures.
- To improve electric motor efficiency through enhanced DC link voltage regulation.
Main Methods:
- Redesigning the inductor core for high voltage applications.
- Implementing the versatile buck-boost converter within a composite architecture for DC bus voltage control.
- Conducting PLECS thermal simulations and experimental validation.
Main Results:
- The proposed topology demonstrated superior power conversion efficiency compared to classical non-inverting buck-boost converters.
- Experimental validation confirmed theoretical analysis through efficiency measures and transient response tests.
- Hardware-in-the-loop (HIL) simulation of a 4.4 kW powertrain verified the architecture's effectiveness.
Conclusions:
- The versatile buck-boost converter is an effective solution for electric vehicle power conversion.
- The redesigned converter module offers superior efficiency and regulation across wide voltage ranges.
- The proposed composite architecture and HIL system provide a robust platform for electric vehicle powertrain development.
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