Principles Of Electric Vehicle Technology

Motor and control system

Pure electric vehicles use electric motors instead of fuel engines, driven by electric motors without the need for automatic transmissions. Compared to automatic transmissions, the motor has a simple structure, mature technology, and reliable operation.

Traditional internal combustion engines can limit the speed at which torque is efficiently generated to a narrow range, which is why traditional internal combustion engine vehicles require large and complex transmission mechanisms; Electric motors can efficiently generate torque over a wide speed range, without the need for gear shifting and transmission devices during pure electric vehicle operation, making it easy to operate and low in noise.

Compared with hybrid electric vehicles, pure electric vehicles use a single electric energy source, and the electronic control system greatly reduces the internal mechanical transmission system of the car. The structure is simpler, and it also reduces energy loss and noise caused by mechanical component friction, saving space and weight inside the car.

The motor drive control system is the main execution structure in the operation of new energy vehicles. The drive motor and its control system are one of the core components (battery, motor, electronic control) of new energy vehicles. Its driving characteristics determine the main performance indicators of vehicle operation, and it is an important component of electric vehicles. The three major categories of electric vehicles, namely fuel cell vehicles (FCVs), hybrid electric vehicles (HEVs), and pure electric vehicles (EVs), all use electric motors to drive the wheels. Choosing a suitable electric motor is an important factor in improving the cost-effectiveness of various types of electric vehicles. Therefore, it is extremely important to develop or improve electric motor drive methods that can simultaneously meet various performance requirements during vehicle operation and have the characteristics of durability, low cost, and high efficiency.

Power batteries for pure electric vehicles

Power batteries are a key technology for electric vehicles, determining their range and cost.