Improved Switching Ripple Modulation Strategy for Simultaneous Power Conversion and Data Communication in DC-DC Converters

Switching ripple communication (SRC), which modulates the PWM carrier with digital data and takes the switching ripple as a signal carrier, helps power electronic converters to transfer digital data along with power. This article discusses the theory and implementation of SRC technology. It proves t...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2022-08, Vol.37 (8), p.9275-9284
Main Authors: Chen, Jinghui, Wu, Jiande, Liu, Keming, Wang, Ruichi, Li, Wuhua, He, Xiangning
Format: Article
Language:English
Subjects:
Buck converters
Communication
Data communication
Differential phase shift keying
Digital data
Energy conversion
Frequency conversion
Frequency hopping
Frequency hopping–differential phase shift keying (FH–DPSK)
Frequency shift keying
load change
Logic gates
Modulation
Noise control
Noise reduction
output voltage disturbance suppression
Phase shift keying
Power control
Pulse width modulation
Reliability analysis
Ripples
Sine waves
Square waves
Switches
Switching
switching ripple communication (SRC)
Voltage converters (DC to DC)
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Summary:Switching ripple communication (SRC), which modulates the PWM carrier with digital data and takes the switching ripple as a signal carrier, helps power electronic converters to transfer digital data along with power. This article discusses the theory and implementation of SRC technology. It proves that the modulation using square wave and sinusoidal wave carriers is compatible. The fundamental principles of frequency hopping-differential phase shift keying (FH-DPSK) modulation are then analyzed in detail, and an improved FH-DPSK scheme is proposed to suppress output voltage disturbances, thereby maintaining power quality, reducing communication noise, and separating power control and data modulation. Furthermore, to evaluate the reliability of the communication technique, the effect of power conversion on communication is discussed in detail. Finally, a buck converter with a switching frequency of 100/83.3 kHz is set up, and the experiment achieves a 16.7 kbps bit rate using quaternary modulation, demonstrating the correctness of the scheme.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2022.3161059