摘要
针对三相交流输入的电动汽车充电机、变频器、光伏逆变器等变换器辅助电源的问题,设计了一种基于双管反激结构的辅助电源,采用UC2844A电流型PWM控制芯片,实现了四路电压的隔离输出,5伏输出时通过LDO芯片进一步稳压。测试结果表明:该辅助电源可以输出80 W额定设计功率,效率高达84%,且纹波小;在100~800 V宽范围电压的直流输入下,能实现四路电压的稳定输出。可见,该电源是一种结构可靠、成本较低、应用广泛的高性能辅助电源。
In view of the flaws of the auxiliary power supply of the battery charger, frequency converter,and photovoltaic inverter of three-phase AC input electric vehicles, an auxiliary power supply based on dual switch flyback has thus been designed, which utilizes UC2844A current type PWM control chips to realize the isolated output of the four circuit voltages, further stabilizing the 5 volt output by LDO chips. The test results show that the auxiliary power supply can output 80 W rated design power with small ripple waves, with its efflciency up to 84%. A stable output of four circuit voltages can be realized via the DC input of 100~800 V wide range of voltage. It is a reliable, low-cost, and widely used high-performance auxiliary power supply.
作者
彭洵
廖无限
谌军
徐丽虹
PENG Xun;LIAO Wuxian;CHEN Jun;XU Lihong(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)
出处
《湖南工业大学学报》
2018年第3期65-70,共6页
Journal of Hunan University of Technology
基金
国家自然科学基金资助项目(51607064)
湖南省自然科学基金资助项目(2016JJ5038)
湖南省教育厅优秀青年基金资助项目(17B072)
关键词
UC2844A
开关电源
双管反激
脉冲宽度调制
UC2844A
switching power supply
dual switch flyback
pulse width modulation （PWM）
