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How to measure the working temperature of permanent magnet motor effectively?

2019-05-22
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Permanent magnet motor is a good energy-saving motor, which is widely used as a product. Compared with the traditional electric excitation motor, it has the advantages of simple structure, reliable operation, small volume, light weight, small loss high efficiency; the shape size of permanent magnet motor can be flexible diverse.

There are many kinds of permanent magnet motors. According to the motor function, it can be divided into two categories: permanent magnet generator permanent magnet motor. Permanent magnet motor can be divided into permanent magnet DC motor permanent magnet AC motor. Permanent magnet AC motor is a polyphase synchronous motor with permanent magnet rotor, so it is often called permanent magnet synchronous motor. Permanent magnet DC motor can be divided into permanent magnet brush DC motor permanent magnet brush DC motor according to whether there is electric drama commutator.

Permanent magnet motor is widely used its operation is very simple. In order to better use maintain it, its temperature should be well controlled, which is very important. So how to measure the ambient temperature of permanent magnet motor when it works?

Place a thermometer 1.5m away the surface of the tested permanent magnet motor. The height of the thermometer the measuring point to the ground the axis line of the reducer shall be the same height. The thermometer shall be affected by external radiation heat air flow. The reading of the ambient temperature value the reading of the working temperature value shall be carried out at the same time.

For the permanent magnet motor, the temperature rise will bring such adverse effects as the damage of winding insulation layer the decline of service life, the decrease of permanent magnet magnetic density, the decrease of motor accuracy caused by demagnetization thermal expansion, the change of electrical parameters caused by temperature change, etc. Therefore, in the use of timely attention, if there is a high temperature motor factors to give the corresponding solutions.


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