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Conductive charging vs Inductive charging | Difference between Conductive charging and Inductive charging

This page compares Conductive charging vs Inductive charging and mentions difference between Conductive charging and Inductive charging. It also describes working of both Conductive charging and Inductive charging used in EV (Electrical Vehicles) for charging batteries.

EV charging system consists of charger control unit, charging cable and vehicle control unit. There are three ways of charging the battery of the EV (Electric Vehicle) viz. conductive charging, inductive charging and replacing the battery.

Conductive Charging System

Conductive charging uses direct contact between EV connector and charge inlet. The cable can be fed from standard electrical outlet or charging station. There are two methods employed in EV charging stations using conductive method viz. AC chargers and DC chargers.

AC charging

EV AC Charging System level-1

AC charging is carried out using AC chargers. This is further categorized into various levels based on features viz. level-1, level-2 and level-3.

EV charging level 1

It allows EV to be connected to most common grounded electrical receptacle (NEMA 5-15R). It is known as Home charging. In this method, vehicle is connected with on board charger which is capable of accepting energy from existing AC supply network.

EV charging level 2

This method utilizes dedicated AC. EVSE (Electric Vehicle Supply Equipment) is used either at private or public locations. In this method, vehicle is connected with on board charger which is capable of accepting energy from alternating current EVSE. It is known as fast AC charging. It uses either 7 KW (32A single phase) or 21 KW (three phase) level. It is used at home, workplace and public charging facilities.

DC charging

EV DC charging system

DC charging is carried out using DC charger. It utilizes dedicated DC EV supply equipment to provide energy from appropriate off board charger to EV in either private or public locations. It is known as fast DC charging. It is used upto 50KW i.e. battery can be charged in 20 minutes from empty to 80% full.

Inductive charging System

Inductive charging uses electromagnetic (EM) field to transfer energy between two objects. Charging station is developed for this purpose. Energy is transmitted through inductive coupling to electrical device. This energy is used to o charge batteries.

Inductive charging

Inductive chargers are used with induction coil to create an alternating EM field from charging base. The portable device such as cars or trucks use second induction coil to receive the EM field. These EM fields are converted back into electric current in order to charge the battery of EV. The figure depicts the process.

Difference between Conductive charging and Inductive charging

From above discussion and using various factors, let us summarize difference between Conductive charging and Inductive charging.

Conductive Charging Inductive Charging
Cable connection is required before charging as it is wired method. Cable connection is not required before charging as it is wireless method which uses EM waves for coupling.
Current in wired cable is used to couple EV charging device and EV. EM waves are used to couple EV charging device and EV.
Charging is fast. Charging is slower.
Less expensive More expensive

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