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advantages and disadvantages of integral ring and splice ring
Mar 30, 2018

advantages and disadvantages of integral ring and splice ring of permanent magnet motor sintered magnet

Our common permanent-magnet motor sintered magnets basically have a ring-shaped heel, and a tile-type splicing.

Arc Magnet.jpg

This is caused by the difference in the production process of the magnets. The whole is called a radiating ring, that is, its magnetic pole is radial, the manufacturing process is complex (the magnetic field must be radiated during orientation molding), the manufacturing cost is high, but the motor performance is stable. In particular, dynamic balance, there is no effect on the stop position of the servo motor after the loss of power (this is of course designed to be tile-like); the other is a mosaic of N magnets, each with a magnetic pole direction, This will cause the quality of each magnet to be inconsistent, resulting in a poor dynamic balance of the motor during operation. This can be seen by measuring the field strength of the rotor after mounting the magnet. The best field strength curve should be a sine wave.

Of course, there are bonded neodymium-iron-boron magnets, but the MM (magnetic moment) of the bonded and sintered in the same volume is a few times or even a few tens of times, which means that the power will be much smaller.

radial Ring Magnet.jpg