Week 4 Session 5
Power converters in an Electric vehicle
four types of power converters
- AC -DC
- DC -DC
- DC -AC
- AC -AC
In the above 4 types we are using the first three ac-ac is not used in EV
The electric vehicle has a 12-volt auxiliary battery to operate the lights, radio, and other equipment.
DC to DC converter is a category of power converters which converts a source of direct current (DC) from one voltage level to another.
As we know that in ev we have an auxiliary battery for various applications such as horn uses 12v dc and similarly lights infotainment systems power window motors etc
The main battery bank provides the necessary voltage to the motor for transmission and this battery is been charged with the help of an onboard charger which converts the ac to dc and then charge the battery. so here we use a ac to dc rectifier for the charging process.
A battery pack. This is the energy reservoir that contains the energy which will be used to drive, operate the heating and cooling, and run all of the other lights and accessories. Typically, batteries use direct current electricity that must be converted to AC, or alternating current, before being used in the electric motor. Sometimes, you will find direct current motors, but these are not common in mass produced electric vehicles. DC charging is faster because it charges the batteries directly.
A power inverter. When an EV has AC motors, the energy from the battery must be converted in order to be used. The inverter also operates when the car is using regenerative braking converting the alternating current generated by the electric motors into direct current to be stored in the battery.
The air conditioning, power steering, and other components us electricity from the battery pack to operate. The lights, radio, and other components typically use traditional 12 volt direct current.