What Makes a “Permanent Magnet” Permanent?
A permanent magnet is defined as an object that is magnetized to produce its own persistent magnetic field. It is permanent because the object remains magnetized, meaning it will always exert an attractive or repulsive force on certain other objects, which are referred to as ferromagnetic. The permanent magnet in a motor is a rare earth magnet, which means it is made from rare earth metals. This does not mean that the motor containing a permanent magnet will be particularly difficult to find: The term rare earth refers the rare earth minerals where these metals were initially found. In fact, rare earth metals are plentiful and a motor made with permanent magnets can be very reasonably priced. If youre looking for a motor with better torque characteristics than a standard variable resistance motor, a PM motor is probably for you. If youre finding that even the PM motor is not providing the level of performance you need, you may want to upgrade to a hybrid motor, which is a motor that ha
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