Title :
Analysis and design for reducing voltage stress in output rectifier of LFLRV SIV DC-DC converter
Author :
Diao Lijun ; Chen Jie ; Lin Wenli ; Liu Zhigang
Author_Institution :
Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China
Abstract :
This paper presents a full-bridge full-wave DC-DC converter used in 35 kVA power grade auxiliary static inverter (SIV) of first low-floor light rail vehicle (LFLRV) in China, where reducing voltage stress in output rectifier diodes is so important for the converter reliability. DC-bias function of high frequency transformer is analyzed and a sensorless digital dc-bias control method by DSP and CPLD without capacitor is given. Voltage spike caused by the secondary winding resonance is analyzed and three output RCD snubber circuit modes are given and compared, the dissipation of each snubber mode is deeply described. Lastly, engineering design methods are additionally given to reduce voltage stress.
Keywords :
DC-DC power convertors; bridge circuits; digital control; invertors; light rail systems; snubbers; RCD snubber circuit; full-bridge full-wave DC-DC converter; low-floor light rail vehicle; output rectifier; rectifier diodes; sensorless digital dc-bias control; static inverter; voltage stress reduction; DC-DC power converters; Diodes; Inverters; Light rail systems; Rectifiers; Snubbers; Static power converters; Stress; Vehicles; Voltage;
Conference_Titel :
Industrial Electronics, 2009. ISIE 2009. IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-4347-5
Electronic_ISBN :
978-1-4244-4349-9
DOI :
10.1109/ISIE.2009.5213060
