Journal
ELECTRONICS
Volume 11, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/electronics11193055
Keywords
electric vehicles (EVs); wireless power transfer (WPT); wireless charging; impedance; modulation scheme
Categories
Funding
- Shenzhen Science and Technology Program [WDZCJH20220814133504001]
- National Natural Science Foundation of China [62001301]
- Project of Educational Commission of Guangdong Province of China [2021KTSCX276]
- Post-doctoral Laterstage Foundation Project of Shenzhen Polytechnic [6021271013K]
- Shenzhen Polytechnic Project [6022310030K]
- Key R&D Program of Guangdong Province, China [2020B0404030004]
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This study proposes a multimodal modulation scheme to consider various output characteristics and working conditions in wireless charging of electric vehicles. By controlling the impedance working conditions, optimal performance can be achieved and verified in experiments.
This study aimed to investigate a multimodal modulation scheme that takes into account the wide range of output characteristics, numerous constraints, and complex working conditions in the wireless charging of electric vehicles. Key electrical parameters and variables in the secondary stages of electric vehicle wireless power transfer (EV-WPT) systems were evaluated based on capacitive, inductive, and resistive impedance working modes. The limiting duty cycle values, D, of the rectifier were derived by detecting the mutual inductance, M. This multimodal modulation was adopted, based on the secondary equivalent impedance phase, to control the impedance working condition and, hence, achieve optimal working performance. The proposed method can modulate the system performance before and during wireless transmission. The proposed control scheme was verified using a 10 kW EV-WPT experimental prototype under a capacitive impedance working mode with 8.5 kW power output. Our proposed method achieved full power output by modulating the impedance working conditions.
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