Development of a high efficient LDC test bed in HEVs using power recycle technique

This paper reports the development of power recycle type test bed for aging test applied to Hyundai Motor's LPI AVANTE HEV in mass production. In the general aging test of LDC, the external input power is required and output power is burned by heat through the load device. Accordingly, solutions to reduce input power installation cost and get rid of load heat consumption during aging test are required. Therefore, this study introduces the way to reuse input of LDC by recycling output power of LDC. The developed power recycle type test bed is designed as 1.5kW class to test up to the maximum load power of LDC and is also designed to supply scant power supply up to 500W after power recycle. This paper reports the theoretical design analysis and operational characteristics analysis results of test bed and verifies the practicality and reliability of it through the test result. The finally developed test bed was able to confirm high energy recycle performance in entire output load section of LDC.