摘要
三相裂变桥电路的应用领域广泛,普通的三相裂变桥电路带动BLDC电机驱动大电流负载时发现MOS管发热严重。因此,从引起MOS管发热的开通损耗、关断损耗、导通损耗以及续流损耗入手,采取分时载波、下桥臂MOS管并联以及上下桥臂并联二极管3大措施,解决6个MOS管的发热问题,达到在低压大电流场合下的设计要求,并提高产品的使用寿命。此外,依据MOS管的导通和截止特性,设计上下桥臂MOS管前极驱动电路,并详细分析了MOS管导通和截止过程中的电流流向。
The three-phase fission bridge circuit has a large application field,when the ordinary three-phase fission bridge circuit drives the BLDC motor to drive a large current load,it is found that the MOS tube generates serious heat.This article starts with the turn-on loss,turn-off loss,conduction loss,and freewheeling loss that cause the MOS tube to heat up.It solves the problem of six MOS tubes through the time-sharing carrier,the lowerarm MOS tube in parallel,and the upper and lower arm parallel diode the problem of heat generation meets the design requirements in the occasion of low voltage and large current,and improves the service life of the product.In addition,according to the conduction and cut-off characteristics of MOS tube,the front pole drive circuit of upper and lower bridge arm MOS tube is designed,and the current direction during the conduction and cut-off process is analyzed in detail.
作者
钱亮
QIAN Liang(Guangan Vocational and Technical College,Guang'an 638000,China)
出处
《通信电源技术》
2020年第12期64-66,共3页
Telecom Power Technology
