The electric forklift with AC drive system significantly improves the overall performance, significantly reduces the failure and component replacement rate, and greatly enhances the reliability; Higher productivity per unit time and lower operating and maintenance costs will bring significant benefits to customers. Therefore, once the AC drive system is launched, it has not only been trusted by forklift manufacturers, but also more and more favored by customers, and has become the trend and direction of the development of electric forklift technology in recent years.

Major Advantage:

Low operating and maintenance costs AC motors are maintenance-free for life

Ac motors do not require reversing contactors (forward and backward reversing), saving parts. More importantly, the AC motor without carbon brush and commutator, not only the volume of the motor is more lightweight and compact, the running speed is increased, and the trouble of regular detection and replacement of carbon brush is completely got rid of. The biggest benefit is that the forklift motor does not require maintenance for almost a lifetime, which greatly enhances the reliability and stability of the forklift; At the same time, the forklift design does not need to consider reserving motor maintenance space, and even the motor can be sealed to make the forklift structural design more compact.

Regenerative braking

Regenerative braking is a non-contact braking that is much simpler than traditional braking systems. Whether the driver brakes by stepping on the brake pedal or switching the direction of the brake, the motor will be in a generator state, and its electromagnetic torque will become the braking torque. This means that brake pad wear is minimized. The mechanical wear is greatly reduced, which reduces the maintenance cost of the forklift truck and makes the operating cost lower. At the same time, AC motors are more efficient in both driving and braking. When braking or reversing, regenerative energy is generated. The harder the brake, the more energy is regenerated. The energy storage device of the AC drive system will automatically start when braking or reversing, sending energy back to the battery, making the battery work longer and have a longer life. Although regenerative braking is also available on some DC-driven forklifts, it must be activated during strong braking, which also means that some of the regenerative energy is converted into heat when braking. In almost all cases, AC motors generate energy regeneration and continue until the forklift is completely stationary, which is obviously more efficient than DC motors in energy regeneration.

Improve production efficiency

The maximum speed of AC motor is much higher than that of DC motor, and the power is more powerful. Moreover, the AC motor can return the regenerative energy obtained to the battery, which not only extends the battery's service time, but also can be used to improve the overall performance of the forklift. The result is that the forklift starts faster on the road, the acceleration/deceleration performance is greatly improved, and the time to reach the maximum speed and the travel distance are shortened. The research shows that in most practical uses, the distance of a forklift from starting to stopping is rarely longer than 20m. The excellent acceleration performance of the AC motor makes it possible to achieve full speed operation of the forklift in such a short distance, and the working efficiency of the forklift is significantly improved.

Easy to program

With the rapid development of semiconductor technology, frequency conversion speed regulation technology has made a breakthrough, which can control the operation of AC motor in real time, greatly enhance the control ability of AC motor, and obtain the same speed regulation performance as DC motor. Ac drive adopts speed torque control, the sensitivity of control is improved, which can improve the operation efficiency of forklift; The acceleration pedal is used to release the braking function (that is, when the accelerator is slightly loosened when the forklift is walking, the regenerative braking will work), and the transition from reversing to reversing can be smooth during the forward process, improving the stability and reliability of the forklift. At the same time, the CAN bus is adopted, and the distributed node is not limited by the installation position. Modular structure, easy system expansion, can achieve seamless addition or modification of functional features; The standardization of bus interface is realized, which makes system integration simpler and unit design more flexible.

More comfortable operation

The AC drive system plays a unique role in improving the operating comfort of forklift drivers. Because AC motors are smaller and lighter than DC motors, this makes the design of forklifts relatively more flexible.