Using high-performance rare earth permanent magnet materials, no
carbon brushes, permanent magnet synchronous gearless traction machine
can drive efficiency up to 90%. It effectively improves the energy
efficiency with energy saving, environmental protection, low speed and
high torque characteristics. Gearless traction machine can be
dividedinto the inner rotor and outer rotor based on the rotor
structure, while permanent magnets stick to these rotors.
Due to the special work environment of the elevator, it is
possibility that magneton the motor will demagnetize after prolonged
use, for example:
1. Unqualified rare earth permanent magnet;
2. Unsaturated magnetization;
3. Motor working temperature exceed magnet permitted range;
4. Long oxidation of rare earth permanent magnet;
1. Unqualified rare earth permanent magnet;
2. Unsaturated magnetization;
3. Motor working temperature exceed magnet permitted range;
4. Long oxidation of rare earth permanent magnet;
In orderto avoid the above situation occurs in practice, the
elevator magnets needs careful and meticulous design and manufacturing.
Magnet design also needs to consider magnet size, magnetic properties
and the worst working conditions of motor. It is better that the
magnetic properties are higher than the practical requirement. Before
installation, rare earth permanent magnets should pass high temperature
aging test and saltspray test.
For a long time, elevator manufacturers use bonding process to fix
permanent magnets on the rotors. Theoretically, using glue and magnetic
force, it could be okay. But In some cases magnets will tear off because
of high temperature or other reasons. To reinforce magnet on the rotor
and reduce the problems caused by magnet dropping, it can combine screws
and adhesive binding by making a countersunk on the basis of simple
block or arc magnets.
MaximMAG makes quality neodymium magnets for elevator traction motors, welcome your inquiries for our magnets. 
