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All about EV – 1


Growth of the EV market comes from our interest in Eco-friendly mobility. Now we’re looking into what really an EV is, which clearly started to get traction due to economic feasibility and its high performance.

Motors replacing engines is not the only difference that EVs have. Here are a couple of things about their basic components and features.

Electric vehicles use energy stored in batteries to power one or more electric motors, whereas conventional vehicles burn fuel in an internal combustion engine.

Electric vehicles use Permanent magnet synchronous motors (PMSMs) which maintain high power/torque density and high efficiency. The powertrain of EV is noticeably quieter than that of the traditional internal combustion engine. It also generates little vibration.

Transmission adapts the output of the rotary motor to the drive wheels. It reduces the input RPM to the transmission to  increase torque to suit the road speed.

An EV stores electricity in a battery to power an electric motor. Huge advances in battery technology made it travel much further on a single charge, compared to early EVs. Hyundai Kona EV boasts 406km range, for instance.

EPCU(Electric Power Control Unit) controls the whole electrical systems or subsystems in an EV. EPCU consists of three components : Inverter, LDC(Low voltage DC-DC Converter), and VCU(Vehicle Control Unit)
– Inverter: It regulates the current flow from the battery to the electric motor.
– LDC(Low voltage DC-DC Converter): This DC/DC converter steps down the supply voltage (12V) from the high voltage battery.
– VCU(Vehicle Control Unit): It acts as a control tower, reading and controlling every sensor signal.

The on-board charger (OBC) converts AC to DC, to charge the battery. Usually the DC charger is known as the Fast Charger.

the energy costs of an electric car are far less than those of an internal combustion engines, and sometimes, even less than those of public transportations.

EVs are known for their instant torque deliveries which lead to ferocious acceleration off the line. When a battery pack is installed close to the ground level, it will lower the vehicle’s center of gravity, hence improve the stability of the car.

According to the Ministry of Environment of South Korea, an EV can reduce up to 2 tonnes of CO2 compared to gasoline cars. And with advancements of renewable energy sources such as wind or solar power, EVs will become even more eco-friendly.