Effect of temperature on permanent magnet motor

The permanent magnet motor installs the motor integrally on the wheel shaft to form an integral direct drive system. Because permanent magnet motors have many advantages and performances, they have attracted attention from various industries.

However, for the operating permanent magnet motor, we must provide certain protective measures and must not take it lightly, otherwise it will cause negative effects, such as common temperature effects. Today we will mainly introduce the effect of temperature on permanent magnet motors! I hope everyone can gain something after reading it!

Zhejiang Jinyi Special Motor Manufacturer conducted relevant research on the causes of smoke failure of permanent magnet motors or the temperature is too high and too hot, and concluded that the influence of temperature on permanent magnet motors is as follows:

1. The power supply voltage of the permanent magnet motor is too high, causing the core magnetic flux density to be oversaturated, causing the motor temperature to rise too high. If the power supply voltage exceeds the standard by a large amount, you should contact the power supply department and provide a solution.

2. The power supply voltage is too low and the motor temperature rises too high under rated load: If it is caused by an excessive voltage drop on the power line, it is recommended to replace it with a thicker power line; if the power supply voltage is too low, contact the power supply department , and then increase the supply voltage.

3. During wire burning, the iron core is burned, causing the iron loss to increase: Then we can do core inspection tests and repair the core to eliminate faults.

4. The stator and rotor cores rub against each other: check the cause of the fault. If the gap between the bearings exceeds the limit, the bearings should be replaced. If the rotating shaft is bent, investigation and treatment are required. When the core is loose or deformed, the core should be processed. Eliminate faults.

5. The winding surface is covered with dirt or foreign matter, which affects the heat dissipation of the permanent magnet motor: it is recommended to clean or clean the motor and keep the motor ventilated.

As for the impact of temperature on the motor, the editor has also further discussed it, and the main summary is as follows:

During the electromechanical energy conversion process of the motor, of the losses generated become heat, which causes the temperature of various components of the motor to rise.

For permanent magnet motors, an increase in temperature will cause damage to the winding insulation layer or a decrease in life, a decrease in the magnetic density of the permanent magnet, or even demagnetization, a decrease in motor accuracy caused by thermal expansion, changes in electrical parameters caused by temperature changes, etc. Negative Effects. For these impacts, relevant departments must provide corresponding solutions.