Main structure of electric trucks

form
The composition of electric vehicles includes: electric drive and control systems, mechanical systems such as driving force transmission, and working devices to complete predetermined tasks. The electric drive and control system is the core of electric vehicles and the biggest difference from internal combustion engine vehicles. The electric drive and control system consists of a driving motor, a power supply, and a speed control device for the motor. The other devices of electric vehicles are basically the same as those of internal combustion engines.
Power Supply
Provide electrical energy for the driving motor of electric vehicles, which converts the electrical energy from the power source into mechanical energy. The most widely used power source is lead-acid batteries, but with the development of electric vehicle technology, lead-acid batteries are gradually replaced by other batteries due to their low energy, slow charging speed, and short lifespan. The main developing power sources include sodium sulfur batteries, nickel cadmium batteries, lithium batteries, fuel cells, etc. The application of these new power sources has opened up broad prospects for the development of electric vehicles.
Drive motor
The function of the driving motor is to convert the electrical energy of the power supply into mechanical energy, and drive the wheels and working devices through the transmission device or directly. DC series excited motors are widely used in electric vehicles, which have "soft" mechanical characteristics that are very consistent with the driving characteristics of automobiles. However, due to the presence of commutation sparks, the DC motor has low power, low efficiency, and a large maintenance workload; With the development of motor control technology, it is bound to be gradually replaced by brushless DC motor (BLDCM), switched reluctance motor (SRM) and AC asynchronous motor, such as caseless disc axial field DC universal motor.