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Electric vehicle technology
Published in V.S.K.V. Harish, Amit Vilas Sant, Arun Kumar, Renewable Energy Integration with Building Energy Systems, 2022
Arpit J. Patel, Chaitali Mehta, Ojaswini A. Sharma, Amit V. Sant, V.S.K.V. Harish
Inductive charging is a form of contactless charging that involves electromagnetic induction between two electrically separated coils. The primary coil located on the road or parking lot is fed from a high-frequency ac supply. High-frequency ac voltage is induced in the secondary coil located at the bottom of the vehicle. The rectifier and dc–dc converter unit located in the electric vehicle modulate the power transferred to the secondary coil to ensure controlled charging of the battery pack. The concept of inductive charging is shown in Figure 6.6. The high-frequency ac supply is obtained by rectification of supply voltages followed by dc–ac conversion. In this inverter operation, the frequency of the output ac supply can be controlled. Moreover, there is no barrier from the end of the inverter in terms of limiting the frequency. This process is carried out off-board.
A Review of the Electric Vehicle Charging Techniques, Standards, Progression and Evolution of EV Technologies in Germany
Published in Smart Science, 2018
Aqueel Ahmad, Zeeshan Ahmad Khan, Mohammad Saad Alam, Siddique Khateeb
Working: The process of wireless power transfer is divided into three different steps, Conversion of power supply, resonance between the coils to transfer power and finally again conversion to charge the battery [9]. First, input AC supply is converted to high-frequency AC [39–44]. This is used to drive the transmitting (primary) coil by means of a compensating network. This high-frequency current in the transmitter side coil generates an alternating magnetic field which induces AC voltages in the receiver (secondary) coil [45–49]. By resonating with the compensation network on receiver side, the transferred power and efficiency are significantly improved. Finally, the AC power obtained is rectified to charge the battery, and in order to improve the efficiency of the system magnetic resonant coupling and DC-DC converter must be employed on receiving side [37,50–55]. The frequency for this system varies in the range from 20 to 100 kHz. Over this range, the converters in the system can operate with as high as 90% efficiency. There exist two methods for inductive charging: Static Inductive Charging and Dynamic Inductive Charging. On the other hand, there are some technical challenges of inductive charger is the efficiency of transmission and safety. Efficiency if power transfer depends on alignment between transmitter and receiver [36,56–63], power pad design [47–49,64–67], frequency of operation [43,68–73], compensation topology [60,61,74–77], and distance between the transmitter and receiver.
Electric Vehicle Advancements, Barriers, and Potential: A Comprehensive Review
Published in Electric Power Components and Systems, 2023
Alperen Mustafa Çolak, Erdal Irmak
Wireless inductive charging, also known as wireless or inductive power transfer, eliminates the need for physical cables and connectors. It uses electromagnetic fields to transfer energy between a charging pad on the ground and a receiver coil mounted on the vehicle’s undercarriage [178,183,184]. This technology enables convenient and automated charging by simply parking the EV over the charging pad. Inductive charging systems typically operate at lower power levels compared to wired charging options, resulting in slightly slower charging rates. However, ongoing advancements in wireless charging technology aim to improve efficiency and increase power transfer capabilities, bridging the gap between wired and wireless charging speeds [185,186].
A Comprehensive Review of Fast Charging Infrastructure for Electric Vehicles
Published in Smart Science, 2018
Wajahat Khan, Aqueel Ahmad, Furkan Ahmad, Mohammad Saad Alam
Inductive or wireless charging method utilises an electromagnetic field for transferring power with no physical contact between the power supply and the vehicle. Inductive charging has an edge over conductive charging in terms of electrical safety. However, high power loss and low efficiency are some of the shortcomings of this method of charging [33]. Wireless charging allows the automated charging of EV that can be realized under three different modes shown in Figure 2: (1) Static wireless charging [34]–[35], (2) Dynamic charging [36]–[37], and (3) Quasi-Dynamic charging [38].