Design of multiplexed output switching power supply for high-speed flat knitting machine control system based on common DC bus

Based on the higher speed and accuracy development of the flat knitting machine control system,technical indexes which can satisfy the requirement of the power supply of the flat knitting machine control system are analyzed,and the scheme for a high frequency switching power with the common DC bus and a multiplexed topology output is designed. The design methods and parameters of a forward type circuit topology power with 24 V input voltage and large output current are selectively analyzed. Experiments have been carried out on a prototype,and the results show that four-way output voltage precision of the switching power supply is within 3%,output voltage is stable,ripple is small,and the efficiency is above 80%. It is accordance with requirements of the power supply of flat knitting machine control system and the knitting speed of knitting machine can reach 1. 5 m / s based on this power supply design. The powder supply design scheme has relatively-high performance-to-price ratio.