Permanent magnet motors, rotors and their permanent magnets
A technology for permanent magnet motors and motor rotors. It is applied in the direction of magnetic circuit rotating parts, electromechanical devices, electrical components, etc. It can solve the problems of permanent magnet motors that cannot operate, permanent magnets are prone to demagnetization, and affect service life, etc., and improve the overall performance. Anti-demagnetization ability, reduce partial demagnetization, and improve the effect of service life
Active Publication Date: 2019-08-23
GREE ELECTRIC APPLIANCES INC +1
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Problems solved by technology
[0003] However, the permanent magnet motor has permanent magnets on the rotor. Under long-term use or harsh working conditions, the permanent magnets are easily demagnetized by the reverse magnetic field applied by the stator windings. Once the permanent magnets are irreversibly demagnetized, the permanent magnets The motor will not be able to run, seriously affecting its service life
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[0048] The invention discloses a permanent magnet to improve the service life of a permanent magnet motor. The present invention also provides a rotor with the above-mentioned permanent magnet and a permanent magnet motor.
[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0050] The invention provides a permanent magnet, the anti-demagnetization ability of the middle part of the permanent magnet is higher than the anti-demagnetization ability of the two end parts of the permanent magnet.
[0051] The study...
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The invention discloses a permanent magnet motor, a rotor and a permanent magnet thereof. The anti-demagnetization capability of the intermediate portion of the permanent magnet is higher than that of the both ends of the permanent magnet. According to the permanent magnet provided by the invention, since the anti-demagnetization capability of the intermediate portion of the permanent magnet is higher than that of the both ends of the permanent magnet, by making the anti-demagnetization capability of the intermediate portion of the permanent magnet higher than the anti-demagnetization capability of the two ends of the permanent magnet, the demagnetization of various parts of the permanent magnet is more uniform, thereby reducing the occurrence of partial demagnetization of the permanent magnet, raising the overall anti-demagnetization capability of a permanent magnet motor, and further improving the usage life of the permanent magnet motor.
Description
technical field [0001] The invention relates to the technical field of motor equipment, in particular to a permanent magnet motor, a rotor and a permanent magnet thereof. Background technique [0002] At present, permanent magnet motors have the advantages of high efficiency and high power density, and have been widely used. [0003] However, the permanent magnet motor has permanent magnets on the rotor. Under long-term use or harsh working conditions, the permanent magnets are easily demagnetized by the reverse magnetic field applied by the stator windings. Once the permanent magnets are irreversibly demagnetized, the permanent magnets The motor will not be able to run, seriously affecting its service life. [0004] Therefore, how to improve the service life of the permanent magnet motor is an urgent problem to be solved by those skilled in the art. Contents of the invention [0005] In view of this, the present invention provides a permanent magnet to improve the servi...
Claims
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IPC IPC(8): H02K1/06H02K1/27
CPCH02K1/06H02K1/27H02K2213/03
Inventor 肖勇李小飞王晶
Owner GREE ELECTRIC APPLIANCES INC