DC-DC变换器基于FH-DPSK调制的纹波通信方法  

Switching Ripple Communication Method Based on FH-DPSK Modulation for DC-DC Converters

作　　者：陈竞辉 吴建德[1] 王睿驰 李武华[1] 何湘宁[1] CHEN Jinghui;WU Jiande;WANG Ruichi;LI Wuhua;HE Xiangning(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China;School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210046,Jiangsu Province,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]南京师范大学电气与自动化工程学院,江苏省南京市210046

出　　处：《中国电机工程学报》2022年第9期3354-3362,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51977189,U1834205)。

摘　　要：DC-DC变换器具有发送数字信息的潜力。功率与信息复合调制技术将功率调制与信息调制相结合,通过对传统PWM载波进行数字调制,从而使变换器以开关纹波作为信号载波实现数字通信。该文通过研究功率与信息复合调制的理论和实现方法,证明了方波载波与正弦载波在调制与解调方法上的一致性;通过详细分析跳频–差分相移键控(frequency hopping-differential phase shift keying,FH-DPSK)调制的基本原理,提出一种FH-DPSK的具体实现方案。该方案结合频移键控(frequency shift keying,FSK)调制和差分相移键控(differential phase shift keying,DPSK)调制的优点,不仅能够极大程度抑制通信过程引起的输出电压扰动,还能够解决因相位切换产生的码间干扰问题。通过搭建实验电路,在100kHz/83.3kHz开关频率的Buck电路上以四进制调制实现了6.6kbps的数字通信,验证了该方案的正确性。The DC-DC converters have the potential to transfer digital data with their power stages. With the combined power/data modulation which applying digital modulation to the PWM carrier wave,the converters can achieve the digital communication by using the switching ripple as the signal carrier. This article focused on principles and practical schemes of the power/data double modulation technology,and proved the consistency between the square wave carrier and the sine wave carrier in the aspect of modulation and demodulation.Moreover, the basic principles of frequency hopping-differential phase shift keying(FH-DPSK) modulation were analyzed in details,and a practical FH-DPSK scheme was proposed. By combining the advantages of frequency shift keying(FSK) modulation and differential phase shift keying(DPSK) modulation, and suppressing the output voltage disturbance caused by the communication process,this scheme solved the problem of inter-symbol interference,and achieved the independence between power control and communication control. Finally,with the quaternary modulation applied,the experiment using a buck converter with the switching frequency of 100kHz/83.3kHz achieved a 6.6kbps bit rate,which proves the correctness of the scheme.

关 键 词：功率/信息复合调制 纹波通信 跳频–差分相移键控 电压扰动抑制 码元同步 

分 类 号：TM42[电气工程—电器]