Week-6 Challenge: EV Drivetrain

1. In electric Vehicle at the

i). Charging section

1. Rectifier to convert the mains AC to DC.
2. To reduce the voltage level a Chopper is required, then it can fed the battery.

ii). Motor Controller

1. If the DC motor is employed then a chopper is required to control the speed of the motor and charge the battery during regenerative braking.
2. if an Induction motor is used then it requires a Chopper along with a inverter to convert dc to AC.

In Hybrid Electric Vehicle

The Charging section and Motor section remains the same and along with these, a bi-directional converter(VSC/VSI/CSI) is used for controlling the flow of power.

2. Battery power=72V

Rated Armature Voltage=72V

Rated Armature current=400A

Ra=0.5Ω

Kφ=0.7V/s

Chopper Switching frequency=400Hz

EV steady state duty cycle=70%

The given motor is a separately excited motor so,

When duty cycle is 70% the voltage delivered to the motor armature gets reduced to 70% so

3. Attached
4. The author have compared the pro’s and con’s of the induction motor with the brushless DC motor , after discussing in brief about the evolutionary implementation of the dc motor to induction motor.

And as a conclusion he told the brushless DC motor will rule the HEV and EV in the near future due to its advantages.