Design and implementation of software phase-locked loop in emergency power supply device of electric locomotive
ZHANG Tengzhao
ZHANG Quanzhu
ZHANG Junsong
TANG Lifeng
XU Haichao
Abstract：The auxiliary power supply system for electric locomotives provides power to the locomotive when it travels to an unpowered area or when the contact network is unpowered.In order to satisfy the chargingdemand and application environment of an electric locomotive auxiliary power supply system,this paper designs a charge for an electric locomotive auxiliary power supply system,choosing the topology of an uncontrolled rectifi-er plus an H-bridge integrated silecon carbide(SiC)power inverter module plus high-frequency transformer isolation and a fast diode rectifier circuit,as well as parameter calculations and the selection of core devices.Based on the DSP core controller,the charger control system design is completed,and the intelligent function is realized by adopting the constant current-constant voltage dual PI software control algorithm.Experimental re-sults show that the charger program design is reasonable,the control algorithm is reliable,and it meets the charging needs of the auxiliary power supply system of electric locomotives and application environment.
Keywords：H-bridge pulse controlSiCconstant current-constant voltagePI
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 76-82 )