How to choose the thickness of motor rotor magnetic steel? Does it have a big impact on motor performance?

Many friends are not very familiar with the motor rotor and magnet-related knowledge, very curious about some magnets thick, some magnets thin, do not know what impact the magnet thickness on the motor, the following Vacuz to introduce it to you! I hope it can help everyone!

1. The thickness of the permanent magnet material should be optimized according to the characteristics of the motor, not the thinner the better, if you want to have a certain thickness, the magnetic trend is related to the thickness of the magnetization direction.

2. Look at the use of the motor, and then choose the thickness of the magnets. If alternating or shock load, choose thicker appropriately, if the load is smooth, you can choose thinner appropriately.

3. The thickness of the magnet affects the antidemagnetization ability. Some simulation software get the magnet thickness more than 10mm for NdFeB, but many textbook examples are less than 4mm.

4. The adjustment of magnet thickness affects the d-axis inductance, and the thickness also affects the working point of the magnets.

5. Increase the thickness of permanent magnets to increase the removal resistance. Increasing the thickness of permanent magnets gives the same current and torque angle in maxwell2D, the more the output changes.

6. When designing the magnetic circuit, setting the thickness of the permanent magnet in the magnetizing direction is a headache. Increasing the length and width of the permanent magnet can increase the flux, but what effect does increasing the thickness in the magnetizing direction have on the magnetic circuit? If there is no effect, is the thinner the block, the better?

7. Change the position of the working point of the permanent magnets. High temperature too thin easy demagnetization (length to diameter ratio), the working point down too thin.

8. affect the magnetic density of the magnet surface under no load, which in turn affects the breath magnetic density, affects the rate of change of the magnet magnetic density after loading, which in turn affects the inverse potential and a series of correlations, affecting the size of the straight axis inductance.

How to choose the thickness of motor rotor magnets? Does it have a big impact on the performance of the motor? After reading the above, I believe that you have already had a preliminary understanding of the thickness of the magnets.

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