Rare earth permanent-magnet synchronization motor with mouse cage type magnetic force regulating sleeve

Abstract

The invention relates to a rare-earth permanent magnetic synchronous motor mounted with mouse mill magnetic force adjuster sheath, wherein it is formed by motor axle (2), muffle (6), stator frame (12), stator winding (11), left and right end covers (14, 4) with left and right bearings (15, 5), permanent magnet (7) and magnetic force adjusting sheath (8). The invention has simple structure and energy saving property, with wide application.

Description

technical field [0001] The invention relates to a permanent magnet direct current motor, in particular to a rare earth permanent magnet synchronous motor equipped with a squirrel-cage magnetic adjustment sleeve. Background technique [0002] In the prior art, the rare earth permanent magnet synchronous motor made of rare earth NdFeB permanent magnet material with high performance and high magnetic field strength (the magnetic field strength can reach 4000 gauss), compared with the double winding DC synchronous motor, its energy saving effect is very significant . However, since the magnetic field strength of this permanent magnet material is too high, it is difficult to optimize the air gap between the rotor and the stator of the motor using this type of permanent magnet material, and it is also difficult to adjust the magnitude of the magnetic force, resulting in difficulty in starting the motor. For this reason, I researched out in 2004 between the stator and the rotor in...

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Problems solved by technology

However, due to the high magnetic field strength of this permanent magnet material, it is difficult to optimize the air gap between the rotor and the stator of the motor using this type of permanent magnet material, and it is also difficult to adjust the magnetic force, which makes it difficult to start the motor.

For this reason, I researched out in 2004 between the stator and the rotor in the motor, the air gap adjustment sleeve (seeing Chinese patent 2004100468889) that a non-magnetic material is made additionally is installed this scheme, has solved the difficulty of starting the motor However, since the air gap adjustment sleeve used is made of non-magnetic material, it has a certain barrier effect on the magnetic field and reduces the magnetic field strength of the permanent magnet to do work, so that the motor generates a large amount of heat during operation and the temperature rises Higher and faster; at the same time, its efficiency is lower than that of existing similar motors

Therefore, in 2006, I researched the scheme of using magnetically conductive material to make the air gap adjustment sleeve (see Chinese patent 2006100320787), which solved the problem of high heat generation, and its energy-saving effect is also very obvious, but it is different from the theory Compared with the efficiency, there is still a certain gap

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