In the rotation direction control of the drive motor, the DC motor relies on the contactor to change the current direction of the armature or magnetic field to realize the rotation direction conversion of the motor, which makes the Confucius circuit complicated and reduces reliability. When the AC asynchronous motor is used for driving, the change of the direction of the motor only needs to change the phase sequence of the three-phase current of the magnetic field, which can simplify the control circuit. In addition, the use of AC motors and its frequency conversion speed control technology makes the braking energy recovery control of electric vehicles more convenient and the control circuit simpler.

The function of the traveling device is to change the driving torque of the electric motor to the ground through the wheels to drive the wheels to travel. It has the same composition as other cars, consisting of wheels, tires and suspension.

Like other vehicles, the braking device of an electric vehicle is provided for deceleration or parking of the vehicle, and usually consists of a brake and its operating device. In electric vehicles, there are generally electromagnetic braking devices, which can use the control circuit of the drive motor to realize the power generation operation of the motor, and convert the energy during deceleration braking into the current for charging the battery, so as to be recycled.

The working device is specially set up by the industrial electric vehicle to complete the operation requirements, such as the lifting device, the gantry, and the fork of the electric forklift. The lifting of the fork and the tilting of the mast are usually done by a hydraulic system driven by an electric motor.

Folding national standard

"Safety Requirements for Electric Motorcycles and Electric Mopeds" mainly specifies the electrical, mechanical safety, signs and warnings, and test methods of electric motorcycles and electric mopeds. These include: the heat generated by electrical appliances should not cause combustion, material deterioration or personal burns; power batteries and power circuit systems should be equipped with protection devices; electric motorcycles should be activated through a key switch.