Abstract
This paper first presents a new powertrain based on a two-battery High-Efficiency Energy Conversion System (HEECS) chopper that is suitable for electric vehicles (EVs). The HEECS chopper is based on the principle of a partial power conversion circuit, and the overall efficiency is over 99% in a wide load range. The efficiency of this powertrain was measured in the steady state by two types of powertrains, a non-chopper powertrain and an HEECS chopper-based powertrain, using a motor test bench. On the basis of these data, several driving tests, such as the Worldwide-harmonized Light vehicles Test Cycle (WLTC), were simulated, and four driving cycle patterns were included. A 6.4% reduction in energy consumption was observed in WLTC low mode compared with the energy consumed by the non-chopper powertrain in the experiments. Thus, the HEECS chopper-based powertrain is more suitable for low-speed driving ranges than high-speed ranges.
Highlights
In recent years, global warming has been receiving more attention
It is observed that the energy consumption of the High-Efficiency Energy Conversion System (HEECS) chopper-based powertrain is 5.1% lower in JC08 mode and 6.0% lower in
The speed range of the 10−15 driving cycle and Worldwide-harmonized Light vehicles Test Cycle (WLTC) low mode is intended for city driving, and that of the others are for a short high-speed driving range
Summary
Global warming has been receiving more attention. One of the solutions is to increase the use of Electric Vehicles (EV), and several barriers to EV use have been investigated. One of the challenges is to establish the appropriate efficiency of the battery energy consumed by the powertrain [1,2]. A series-chopper-type powertrain has been proposed [4,5]. In this design, a DC–DC converter is inserted between the battery and inverter, and the inverter input voltage is controlled by the chopper. This paper describes a high-efficiency chopper-based powertrain. The content is organized as follows: Section 2 explains the proposed chopper-based powertrain.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
