I believe many friends in the electromechanical industry will have a lot of doubts about the faults and selection of gear reducer motors. Only when they have doubts can they raise questions and solve problems, they will constantly improve their understanding of reducer motors. Four questions about motors are summed up, and I believe many friends also want to know the answers.

Look at the answer to the question.

1. Why is it easier to burn down the gear motor now than in the past?

Due to the development of insulation technology. It is also required to reduce the volume, so that the heat capacity of the new gear reduction motor is getting smaller and smaller, and the overload capacity is getting weaker and weaker. The motor is required to operate in many ways, such as frequent starting, braking, positive and negative rotation and variable load, which puts forward higher requirements for motor maintenance equipment. In addition, motors are widely used and often work in extremely harsh environments, such as damp, high temperature, dusty, corrosive and other places. In addition, there are irregularities in motor repair and equipment management. All these are easy to cause the gear reduction motor to be damaged more easily than in the past.

2. Why are conservative maintenance devices not effective?

Conservative motor maintenance devices are mainly fuses and thermal relays. Fuse is the earliest and simplest maintenance device. In fact, the fuse is mainly used for short circuit fault, maintenance of power supply lines, reduce the expansion of fault range. It is unscientific to think that the fuse can maintain the short circuit or overload of the motor, and the fuse should be selected according to the rated current instead of the starting current of the motor. Don't you know, this is more likely to cause damage to the motor due to open phase operation. Thermal relay is the most widely used motor overload protection device. But the thermal relay has single function, low sensitivity, large error and poor stability. Has been recognized by the majority of electrical workers. All these defects result in unreliable motor maintenance. In fact, even though many devices are equipped with thermal relays, the phenomenon of gear motor damage affecting normal production is still common.

3. The principle of maintainer selection?

The purpose of selecting motor maintenance device can not only make the motor give full play to its overload capacity, but also avoid damage, but also improve the reliability of electric drive system and the continuity of production. At the same time, several contradictory factors, such as reliability, economy, simple structure, convenient operation and maintenance, must be considered when selecting maintenance device. When the maintenance requirements can be met, the simplest maintenance device should be considered first. Only when the simple maintenance device can not meet the requirements or has higher requirements for maintenance characteristics, the complex maintenance device should be considered.

4. Ideal motor maintainer?

The ideal gear reducer motor maintenance device is not the most functional, nor the so-called most advanced, but should be the most practical. So what is practical? The utility shall meet the requirements of reliability, economy, convenience and other factors, and have a high performance price ratio. So what is reliability? Reliability should first satisfy the reliability of functions, such as over-current and open phase functions, which must be able to operate reliably for over-current and open phase in various situations, processes and ways. Secondly, its own reliability, since the maintainer is to maintain others, especially should have a high reliability, must have a variety of harsh environment adaptability, stability, durability. Economy, advanced design and reasonable structure; Specialized and large-scale production to reduce product cost. It brings high economic benefits to users. Convenience: must be in the device, use, adjustment, wiring, etc., at least similar to the thermal relay. As simple and convenient as possible. Because of this, relevant experts have long predicted that in order to simplify the electronic motor maintenance device, the passive design scheme without power supply transformer should be designed and adopted, and semiconductors such as thyristors should be used to replace the electromagnetic actuators with contacts. In this way, it is possible to produce a maintenance device consisting of a minimum number of components.