Reducer can not run overload

Release time:

2024-04-23

The reducer manufacturer said that this situation is just like the lighting lamp in the home. The current is very large when starting, but the current will be larger during normal use than when starting, and so will the motor. What is the principle for this? Here we need to understand from the perspective of motor starting principle and motor rotation principle: when the induction motor is in a stopped state, from an electromagnetic point of view, it is like a transformer. The stator winding connected to the power supply is equivalent to the primary coil of the transformer, and the closed-circuit rotor winding is equivalent to the secondary coil of the transformer that is short-circuited. There is no electric connection between stator winding and rotor winding, only magnetic connection, magnetic flux through the stator, air gap, rotor core into a closed circuit. At the moment of closing, the rotor has not yet rotated due to inertia, and the rotating magnetic field cuts the rotor winding at a larger cutting speed-synchronous speed, so that the rotor winding induces a higher potential that may be reached. Therefore, a large current flows in the rotor conductor. This current generates magnetic energy that offsets the stator magnetic field, just as the secondary magnetic flux of the transformer offsets the primary magnetic flux.

Another situation is the quality problem when manufacturers use raw materials. Some manufacturers in the choice of reducer materials in order to save costs and reduce prices and the use of relatively poor original. In this case, even if the user is running normally, it is easy to hit the teeth. Under normal circumstances, the raw material of the box body is HT250 high-strength cast iron, and the material of the gear is the choice of high-quality 20CrMo high-quality alloy steel and after many times of carburizing treatment, while the surface hardness of the flat key on the shaft of the reducer is HRC50. Therefore, when choosing a reducer, you need to understand the production of the reducer, and don't just care about the price.

There are two possible situations like this user, one is the user's own problem. In the process of using the reducer motor, it runs under the load of the machine itself. At this time, there will be situations like overload operation and the machine can't stand it. Therefore, when selling the reducer, we also remind customers not to run under heavy load, which will cause the corresponding gear or worm wheel of the reducer motor to be unbearable during the whole operation process. Therefore, there will be such situations-tooth punching or increased wear.