Surface-mounted high-speed permanent magnet synchronous motor adopting selected-area permeation heavy rare earth magnet
A permanent magnet synchronous motor, heavy rare earth technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuits characterized by magnetic materials, magnetic circuits, etc., can solve problems such as irreversible demagnetization, and avoid heavy Waste of rare earth, increase coercive force, and reduce the effect of local loss of magnetization risk
Pending Publication Date: 2022-05-03
HARBIN UNIV OF SCI & TECH +1
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Problems solved by technology
[0004] The present invention aims to solve the problem that the surface-mounted high-speed permanent magnet motor of the existing NdFeB permanent magnet material is prone to irreversible demagnetization, and now provides a surface-mounted high-speed permanent magnet synchronous motor using selective infiltration heavy rare earth magnets
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specific Embodiment approach 1
[0025] Specific implementation mode one: refer to figure 1 , 4 and 5 specifically illustrate this embodiment. A surface-mounted high-speed permanent-magnet synchronous motor using selective infiltration heavy rare earth magnets described in this embodiment includes: a rotor and a stator, the stator is coaxially sleeved on the outer circumference of the rotor, and the two There is an air gap between them. The stator includes a stator core 1 and a stator winding 2 , and the stator winding 2 is embedded in a stator slot on the inner peripheral surface of the stator core 1 . The rotor includes: a rotor core 6 and a rotating shaft 7 , the rotor core 6 is coaxially sleeved on the outer circumference of the rotating shaft 7 , and four tile-shaped permanent magnets are pasted on the outer circumference of the rotor core 6 . The four permanent magnets are two N-pole permanent magnets 4 and two S-pole permanent magnets 5, two N-pole permanent magnets 4 and two S-pole permanent magnets...
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The invention discloses a surface-mounted high-speed permanent magnet synchronous motor adopting a selected-area permeation heavy rare earth magnet, and relates to the technical field of motors. The objective of the invention is to solve the problem that irreversible demagnetization is easy to generate in a surface-mounted high-speed permanent magnet motor made of a neodymium iron boron permanent magnet material in the prior art. According to the surface-mounted high-speed permanent magnet synchronous motor adopting the selected-area permeation heavy rare earth magnet, four permanent magnets are neodymium iron boron permanent magnets N38SH, heavy rare earth permeates into each permanent magnet, the heavy rare earth is close to one side of the permanent magnet where the heavy rare earth is located, the heavy rare earth is distributed in three areas, namely a first area, a second area and a third area, and the first area, the second area and the third area are distributed in parallel. The cross section of the second area is annular fan-shaped, and the first area and the third area are located on the two sides of the second area respectively. Compared with a traditional N38UH permanent magnet, the amount of heavy rare earth needing to be added is more than one time lower than that of heavy rare earth needing to be added, the coercive force of the position prone to loss of magnetism can be effectively improved, heavy rare earth waste caused by adding the heavy rare earth to the position not prone to loss of magnetism is avoided, and efficiency and operation reliability are improved.
Description
technical field [0001] The invention belongs to the technical field of motors, in particular to magnets of motors. Background technique [0002] Surface-mounted high-speed permanent magnet synchronous motors are widely used in high-speed grinding machines, air circulation refrigeration systems, Energy storage flywheels, fuel cells, and high-speed centrifugal compressors for natural gas transmission, etc. NdFeB permanent magnet materials are widely used in high-speed permanent magnet motors due to their excellent magnetic properties. [0003] Because the rotor of the surface-mounted high-speed permanent magnet synchronous motor driven by sine wave has difficulty in heat dissipation in the limited air gap space, the temperature of the permanent magnet will rise under the action of eddy current loss; and the Curie temperature of NdFeB permanent magnet material is low. Irreversible demagnetization will occur under the action of demagnetizing magnetic field at high temperature....
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Login to View More IPC IPC(8): H02K1/02H02K1/278H02K21/14
CPCH02K1/02H02K1/278H02K21/14H02K2213/03
Inventor 谢颖姜佳宁蔡蔚任少卿于勇海周博阳鲁富强王世伟
Owner HARBIN UNIV OF SCI & TECH