Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 9, Issue 3, Pages 3822-3834Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2020.3016973
Keywords
Differential amplitude shift keying (DASK); intersymbol interference (ISI); simultaneous wireless power and information transmission (SWPIT); wireless power transfer (WPT)
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This article introduces a high-data-frequency-ratio information transmission method for fast dynamic response SWPIT systems. Through DASK modulation, the integration of power and information transmission has been achieved successfully with stable transmission.
Integration of power and information transmission is promising for simultaneous wireless power and information transmission (SWPIT). This article presents a differential amplitude-shift keying (DASK) modulation-based high-data-frequency-ratio information transmission method for fast dynamic response integrated SWPIT systems. Modeling and analyses of the phase-shifting modulation of power converters indicate the potential of the DASK modulation for information transmission. Operation principle of the proposed modulation is established to maintain the stability of power transmission based on the modeling. Modulator, demodulator, and communication protocol are further designed. Using the dynamic analytical model of the transmission channel, the active intersymbol interference (ISI) elimination characteristics are analyzed. Due to the ISI elimination, a high-data-frequency-ratio and fast dynamic response SWPIT is realized. Interactions between power and information transmissions are evaluated, and the results show anti-interference performances. Finally, an experimental prototype rated at 200 W is built to verify the effectiveness of the method, and the data-frequency ratio reaches 0.5 hit/Hz. Complexity, cost, and response period of the method are reduced significantly, and it can be extended to other applications universally.
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