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Zhuji Electric Technology Co., Ltd.
Contact: Manager Liu
Mobile: 15968565201 (WeChat same number)
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Add: No. 15th, Zhuji Road, Zhuji, Shaoxing, Zhejiang Province, Shaoxing, Zhejiang Province

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Working principle and characteristics of magnetic coupler
Edit:Zhuji Electric Technology Co., Ltd.   PublicDate:2019-01-26

Magnetic couplerComposition and working principle of

The magnetic coupler is also called a magnetic coupling, which is mainly composed of a conductive magnet connected to the shaft end of the motor and a permanent magnet connected to the load end. In operation, according to the Eddy current sensing principle, the above two parts relative motion to produce a magnetic field, and thus in the disc conductor will produce Eddy current, and Eddy current generated by the magnetic field and magnets attract each other, so that the rotor and conductor two parts through the air gap transfer torque, so that the motor and load from the original hard connection to soft connection [1 This is shown in Figure 1 and Figure 2.

According to the above principle, different types of magnetic couplers, such as delay type, moment limit type and speed regulation type, have been developed in China in recent years. Our company is using the limited-moment magnetic coupler produced by Shanghai High-rate Electromechanical Technology Co., Ltd. In recent years, with the development of energy-saving and internal excavation of cement enterprises, such as magnetic couplers, dynamic harmonic energy-saving devices, etc., has been gradually applied and popularized in the cement industry.

The advantages of magnetic coupler are mainly embodied in the following aspects:

1) Drive motor current reduction, energy-saving effect is significant. With the use of magnetic couplers, the efficiency of the magnetic coupler is the highest, whether it is the energy efficiency of a single device or the always effect of the system. Therefore, the use of magnetic couplers will reduce energy consumption and save operating and maintenance costs for cement production line equipment.

2) The use of magnetic coupler, can greatly reduce the vibration of the equipment, extend the service life of the motor and its bearings. The magnetic coupler transmits torque by air gap and is a true contactless connection device. This connection method can make the equipment connection stress more uniform, the performance is better in the pair, and the bearing capacity is greatly enhanced. By detecting, the use of magnetic couplers can reduce vibration by more than 80%.

3) After using the magnetic coupler, the flexible start of the equipment (that is, soft start) can be well achieved, can be very good protection of the motor and load.

4) The use of magnetic couplers can reduce the failure rate. Because the magnetic coupler transmits torque by air gap, there are no worn parts, basically no failure, which will reduce the failure rate, thus greatly reducing downtime.

5) The magnetic coupling apparatus has overload protection function, which improves the safety and reliability of the system operation. The hydraulic coupler commonly used in cement enterprises is protected by overload by means of fuel injection and pressure relief, and this overload protection mode not only pollutes the environment, but also increases the repair time and maintenance cost.

6) Magnetic coupler structure is simple, no lubrication, no pollution damage to the environment, is a green environmental protection products.

7) for devices with a narrower range of speed regulation, such as high temperature fans, the stepless speed regulation of the load can also be achieved by adjusting the air gap between the two parts of the magnetic coupler.