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Phase-shift control strategy is adopted extensively in wireless charging system (WCS) to regulate inverter output voltage, and namely, adjusting system output power under various load conditions. However, when it comes to light load or even no-load, the lower the output power is, the larger phase angle should be — which could cause inverter output voltage waveform to be abnormal. So, how to satisfy...
Class E amplifier is a high frequency power supply for the magnetic resonance wireless power transmission (WPT) system for electric vehicles, and its efficiency is an important index to evaluate the performance of the system. In view of the efficiency and voltage stress in the switch device of class E amplifier are verified dramatically with the load change, this paper proposed an active control strategy...
This paper presents a high precision direct multi-cell Battery Voltage Detecting Circuit (BVDC) for Battery Management Systems (BMS) in electric vehicles. BVDC in BMS must be able to accommodate direct voltage input up to tens of volts from series connected batteries, fulfil the precision needs by battery state of charge estimation algorithm. The BVDC circuit is designed with a 0.5μm 1-poly 3-metal...
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