Bridge crane follows the work rule of "start, brake, start, brake” in the work process for a long time, at the same time the power is in on and off state. And the lifting motor will carry different weight in the continuous reversal process. Therefore, for bridge crane motor, there are several requirements.
First, the bridge crane equipment must comply with the requirement of big starting torque and small lifting current. The reason is that the lifting motor usually starts with carrying heavy objects, and the starting torque has a certain effect on the hoisting performance.
Second, when loading and unloading, bridge crane should ensure the accurate placement. At present, we can use the electrical speed regulation method, through adjustment of the work speed for many times, to achieve the accurate placement of goods.
Third, the outer packing of bridge crane motor should be strengthened. The main idea is to strengthen mechanical structure and use high-grade heat insulation material on the outer packing. Because in the continuous operation of motor, it will be influenced by external mechanical impact, and meanwhile it will generate high energy, which requires good heat dissipation function of packaging.