Motor Technology in forklift

Below, we give a brief introduction for several existing motor technology.
Series DC motor
This is the oldest and most traditional motors. Current is supplied to the battery and turn dry and carbon brushes spread through the stator. This approach has two drawbacks: All the current must be sent via carbon brushes, carbon brushes performance depends on the physical size and wear. Most importantly, it limits the play braking performance. In addition, the motor carbon brushes as wearing parts must be replaced periodically, otherwise it will greatly affect the motor life. With this in mind, many manufacturers are configured to detect wear and tear on the truck and issued a warning device, the device increases the cost of the truck.
All motors are fever, but in the DC motor, the motor heat is mainly produced in the interior parts, so most of the DC motor will be equipped with a fan for cooling.
He shunt motor
This is a more advanced DC motor, the stator and armature, respectively the energy input. Motor in series with the same, this technology has been applied for a long time. The new technology uses separate excitation and the excitation field and armature, the performance of the motor control is much better than the series motor. Such a motor is often called four-quadrant motor, since it can travel in both directions around the brake. However, motor carbon brushes defect still exists.
Three-phase AC motor
Technically speaking, this is the most simple structure of an electric motor. The principle is a three-phase alternating current delivered to the fixed coil, a voltage is generated on the rotor rotating magnetic field induction shorted. AC motor no brushes, a DC motor is generally no limit on the maximum current terms, this means that the motor can be obtained in actual use can be born more and larger brake torque, then faster speed.
AC motor, the heat occurs mainly in the motor housing part of stator coils for cooling and heat dissipation. If desired, the rotor can be sealed. AC motors do not require periodic replacement of wearing parts, at the same time, it is more than a DC motor efficiency, durability, and less expensive.
As mentioned earlier, the presence of equipment such as 2 Ton Diesel Forklift Truck battery and AC technology are two problems: low system voltage of 80V and the corresponding high current; energy loss when switching AC and DC.