Description:

Introduction: Drivetrain is the assembly of all the components involved in the transmission of the power from the engine of the vehicle to its wheels. The elements of the drivetrain perform the following functions:

1. Remain stationary even with the engine running

2. Achieve the transition from a stationary to a mobile state

3. Convert torque and rotational speed

4. Provide for forward and reverse motion

5. Compensate for wheel-speed variations in curves

6. Ensure that the power unit remains within a range on the operating curve

7. Commensurate with minimum fuel consumption and exhaust emissions

Process: The function of the drivetrain is to couple the engine that produces the power to the driving wheels that use this mechanical power to rotate the axle. This connection involves physically linking the two components, which may be at opposite ends of the vehicle and so requiring a long propeller shaft or drive shaft. The operating speed of the engine and wheels are also different and must be matched by the correct gear ratio. As the vehicle speed changes, the ideal engine speed must remain approximately constant for efficient operation and so this gearbox ratio must also be changed, either manually, automatically or by an automatic continuous variation.

An electric vehicle drivetrain comprises:

• Hybrid motor assembly comprising an AC motor and a DC motor;
• Power stage is configured to deliver a predetermined amount of the electrical energy to the AC and DC motors, and
• Microprocessor-based control system configured to control the drivetrain.

AC-DC converters (rectifiers), DC-DC converters, and DC-AC converters (inverters) are the three types of power converters found in powertrain electrification systems used in vehicle propulsion systems (inverters).

Commercialization: Audi, BMW, Hyundai, Kia, Tesla