Elevator motor development overview

Making use of a permanent magnet elevator motor, has a long history, is the world's first electric elevator motor permanent magnet elevator motor, but early permanent magnetic material is low, permanent magnet elevator motor is very heavy, so soon to be replaced by a elevator motor excitation current . By the 20th century, 30 years later, with high remanence density Alnico materials and has a high coercivity ferrite permanent magnet material has appeared, permanent magnet elevator motor began to develop. But these two permanent magnet materials have weaknesses, the performance is not satisfactory, mainly for micro machine area. The late 1960s, the rare earth permanent magnet materials and various other performance continues to improve, and promote the rapid development of the permanent magnet elevator motor. Has three generations of rare earth permanent magnet materials, rare earth permanent magnet materials performance has been greatly improved. Of particular note is that our country is a big country of rare earth reserves of the world, our research in this area has also made great progress
The basic structure of permanent magnet synchronous elevator motor and the type of
    Permanent magnet synchronous elevator motor is a synchronous elevator motor by a winding evolved, its structure and winding synchronous elevator motor is basically the same. By a three-phase winding and the stator core structure, and often Y-shaped armature windings connected; structure of the rotor, permanent magnet synchronous elevator motors with permanent magnets instead of electrical excitation, thus eliminating the excitation coil, slip rings and brushes. Compared with ordinary elevator motor, permanent magnet synchronous elevator motors must also be equipped with a permanent magnet rotor position detector for detecting the magnetic pole position, and thus on the armature current control to achieve the purpose for PMSM servo control.
    Compared with other elevator motors, AC permanent magnet synchronous elevator motor structure is relatively simple, it is characterized by: a relatively high power factor and efficiency; effective material utilization is high; their output power; small; reliable operation. Since permanent magnet synchronous motor in certain technical performance is superior brushless DC servo elevator motors and induction elevator motors, so in high-performance permanent magnet synchronous elevator motor servo drive system (especially small and medium-power control system of all kinds) has been widely applications, such as CNC machine tools, industrial robots, LSI manufacturing, office automation equipment, flexible manufacturing systems, petrochemical equipment, manned spacecraft, power tools and household appliances and other fields.