Electric cars
Electric cars are driven by the electric source and electric motor. In recent years, the research of high-performance batteries and fuel cell has made significant progress; there have appeared electric vehicles that meet the requirements of users in a certain extent. However, there are many technical issues on the price of electric vehicles to be resolved.
Drive Technology: DC motor is suitable for drive motor and its control system is simpler, but the drawback is the high cost, weight, and inertia of rotating part of the AC motor is the 3-5 times as the same capacity ac motor. Therefore, as to the car need for frequent acceleration and deceleration, the energy consumption in inertia rotating part of added, so it only be used by some part of the light-class electric vehicles. So most of people think that drive system, AC motor is the best option, the maximum efficiency have reached 96%, and the optimization with variable speed drive system has been developed.
