With EVs becoming more and more popular in the Indian market, enterprises are increasingly upgrading the supporting infrastructure to facilitate convenience for Ev drivers and increase adoption of EV’s.
Apart from convenience, improvements to the infrastructure also encourage wider EV adoption across the populace, thereby accelerating the transition to carbon-free, green energy.
Charging is the most important element of this infrastructure, and the majority of developments have been made towards improving this aspect, the newest one being wireless electric charging.
Yes, EV owners can now enjoy the same level of ease with their cars as they do with their phones. More importantly, it opens up efficiency Efficiency, speed levels and uninterrupted ease of transportation.
In this blog,Explore the types of wireless charging architectures.
Types of Wireless Electric Charging
There are 2 ways to wireless transfer power to an EV – A static mode and Dynamic mode. Pls dont use words statically and dynamically
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Static EV Charging (Office or Home Charging Station)
Static charging requires the vehicle to be at standstill while being charging. Very similar to conventional wired charging but rather having transfer of power through induction.
While the vehicle is parked over the wireless charging area, the transmitters laid underneath the asphalt couple power into the receivers placed underneath the chassis of the vehicle
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Dynamic EV Charging (Highways and Roads)
The mechanism will be similar to the static wireless charging systems and will be expected to operate seamlessly at no speed barrier.This will allow EV owners to drive long distances without running out of power.
Building these wireless charging roads will undoubtedly be a costly undertaking but is a long way off in the future.
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Capacitive Wireless Charging System (CWCS)
In this method, energy is wirelessly transferred from the transmitter to the receiver through a displacement current generated by varying the electric field. Coupling capacitors are used instead of magnets and coils for wireless charge transmission.
The process goes as follows – a power factor correction circuit first processes the AC voltage to enhance efficiency and maintain voltage levels. It is then converted to high-frequency AC by an H-bridge, creating an oscillating electric field. This field induces displacement current at the receiver, which is converted to DC to charge the battery.
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Permanent Magnet Gear Wireless Charging System (PMWC)
In the permanent magnet gear wireless electric charging mechanism, both transmitter and receiver have armature windings and synchronised permanent magnets.
The transmitter operates like a motor, with AC current inducing mechanical torque and rotating its magnet. This rotation causes synchronous rotation in the receiver magnet due to magnetic interaction.
The receiver then generates AC current and starts acting as a generator. The generated AC power is rectified, filtered, and fed to the battery through power converters.
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Inductive Wireless Charging System (IWC)
The basic principle of an inductive wireless electric charger is Faraday’s law of induction.
Wireless power is transmitted by mutual induction between the transmitter and receiver coils. The transmitter coil’s AC magnetic field induces AC power in the receiver coil.
This AC output is filtered and rectified to charge the EV’s battery. Power transfer depends on frequency, mutual inductance, and coil distance, and it operates at 19 to 50 KHz.
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Resonant Inductive Wireless Charging System (RIWC)
Lastly, high-quality resonators transmit energy efficiently at resonance, allowing for power transfer over long distances without wires. The maximum electric transfer occurs when the transmitter and receiver coil resonant frequencies match.
Additional compensation networks in series and parallel combinations are added to optimise resonant frequency and reduce losses. RIWC’s operating frequency is between 10 and 150 KHz.
Wrapping Up
The auto industry is steadily moving into a phase where EVs will occupy more and more market share, forcing manufacturers to meet emission standards.
As the transition from ICE to EVs unfolds, our infrastructure needs to be ready to support this shift, chiefly in terms of charging.
HuseHQ, with our R&D and innovation, is making it easy for facilities, commercial spaces, and residential spaces to transition to an EV-friendly infrastructure with our static and dynamic wireless charging systems.Connect with us to learn more about our capabilities.
