开关DC_DC变换器双频率脉冲序列调制技术.pdf

第 30 卷第 33 期中国电机工程学报 , 2010
2010 年 11 月 25 日 Proceedings of the CSEE ©2010 . 1
文章编号:0258-8013 (2010) 33-0001-08 中图分类号:TM 85 文献标志码:A 学科分类号:470·40
开关 DC-DC 变换器双频率脉冲序列调制技术
王金平,许建平,秦明,牟清波
(西南交通大学电气工程学院,四川省成都市 610031)

Bi-frequency Pulse Train Modulation Technique for Switching DC-DC Converters
WANG Jinping, XU Jianping, QIN Ming, MU Qingbo
(College of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China)
ABSTRACT: A novel modulation method, bi-frequency pulse 0 引言
train modulation (BF-PTM), for switching DC-DC converters
开关 DC-DC 变换器普遍采用脉冲宽度调制
was proposed. BF-PTM realizes the output voltage regulation
(pulse width modulation,PWM)和脉冲频率调制
of switching DC-DC converters by the modulation of two
control pulses with the same turn-on time but different (pulse frequency modulation,PFM)技术实现对开关
[1-6]
frequencies. BF-PTM is applicable to the control of various 变换器的控制。PWM 通过调整控制脉冲的宽度
switching DC-DC converters. The operation principle and 实现对开关变换器输出电压的控制,是一种恒定频
control characteristics of BF-PTM controlled switching DC- 率控制方法,具有易于设计反馈控制环路的优点,
DC converters were analyzed with a Buck converter operating 但存在系统轻载效率低、动态响应速度较慢、电磁
in discontinuous conduction mode (DCM) as an example. 干扰噪声大[7]等缺点;PFM 通过改变控制脉冲的频
Simulation and experiment results indicate that BF-PTM 率实现对开关变换器输出电