The useful of elevator motor

elevator motor is a permanent magnet material generates excitation magnetic field, instead of electrical excitation. It does not require excitation current, the rotor-circuit loss. elevator motor excitation magnetic field generated by the permanent magnets and the stator winding of the current generated by the electromagnetic coupling of the motor rotation. Permanent magnetic materials and physical properties of elevator motor performance are closely related. Permanent magnetic materials research and production has developed rapidly. elevator motor with inner rotor and outer rotor type two, contained within the rotor for major, high-speed applications; outer rotor type, small size, suitable for elevators without machine room.

 Permanent magnet synchronous gearless traction machine with the traditional worm gear, worm gear traction machine compared with the following advantages: a) permanent magnet synchronous gearless traction machine is a direct drive, no worm, worm drive, elevator motors did not make much of space required for induction motor stator coil, and the production of elevator motor main material is high energy density high remanence induction and high coercivity NdFeB, its flux density generally reach more than 0.75T , so you can do small and light weight. b) high transmission efficiency. As  a result of elevator motor direct drive (no worm gear deputy) the transmission efficiency can be increased by 20% to 30%. c) permanent magnet synchronous gearless traction machine because there is an induction motor running at high speed bearing noise and what happens there is no contact with the worm gear transmission that occurs when noise, so noise can be reduced whole 5 ~ 10db (A) . d) low energy consumption.

 Works from the elevator motor shows its permanent magnet excitation is achieved, without the stator to provide an additional excitation current, and thus the power factor can reach very high (theoretically can reach 1). elevator motor rotor while no current through the rotor depletion problem does not exist. Generally lower than asynchronous motors consume 45% to 60%. Since there is no low efficiency, high energy consumption worm gear pair, power consumption is further reduced. e) permanent magnet synchronous gearless traction machine because there is no tooth profile wear problems and does not require periodic replacement of oil, so its long life, and basically no maintenance. Security is a new generation of energy-saving and permanent magnet synchronous traction elevator is a major feature, is unmatched by a traditional lift big technological progress. Permanent magnet materials synthesis and sintering of the world leading level, the level of production of permanent magnet motor soon catch up with the world level, in order to lift production to provide favorable conditions.