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Insulated rotor structure

A technology of insulated rotors and outer rotors, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit characterized by insulating materials, magnetic circuit rotating parts, etc., can solve the problems of increasing the potential difference between the inner and outer rings of the bearing, electrostatic corrosion, etc.

Inactive Publication Date: 2017-05-31
FGLS ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Claims caused by such defects in the market are due to the fact that the bearing and the electronic surface are at the same potential, which increases the potential difference between the inner and outer rings of the bearing and causes electrostatic corrosion

Method used

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  • Insulated rotor structure
  • Insulated rotor structure
  • Insulated rotor structure

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing, but not as limiting the present invention:

[0018] figure 2 Among them, an insulated rotor structure is composed of a permanent magnet 1, an outer rotor yoke 2, an inner rotor core 3, and PBT plastic (polybutylene terephthalate) 4 which are injection-molded in a mold as a whole. Among them, PBT is filled between the inner rotor core 3 and the outer rotor yoke 2, and the distance between them is greater than 5mm. The larger the distance between the two, the smaller the electrostatic capacity on the rotor and the lower the shaft voltage, which will cause electrostatic corrosion. The probability is also lower.

[0019] Such as figure 1 As shown, when the components of the rotor are injection molded in the mold, the positioning holes required for each component are as follows. The positioning hole I7 is the process hole for fixing the inner rotor core 3, so that the inner rot...

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PUM

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Abstract

The invention provides an insulated rotor structure, which comprises a permanent magnet, an outer rotor magnet yoke and an inner rotor core, wherein the part between the outer rotor magnet yoke and the inner rotor core is filled with circular PBT plastic of which the thickness is greater than 5mm; waist-shaped slots and round holes are alternately arranged in the circumference of the PBT plastic; and wall thicknesses are reserved in the waist-shaped slots and the round holes. A structure that a rotating shaft is insulated from a charged part of a rotor is adopted by the rotor, that is to say, the rotor core is changed into two parts from one part and comprises the inner rotor core and the outer rotor magnet yoke, and the part between the inner rotor core and the outer rotor magnet yoke is filled with the PBT plastic to play an internal and external insulation role, so that the probability and the degree of static corrosion are greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of micro and special motors, and more particularly, relates to an insulating rotor structure used in micro motors. Background technique [0002] The DC frequency conversion motor used in the central air-conditioning coil fan, the rotor adopts the integrated injection molding structure of the permanent magnet and the rotor core, and the rotor core is made of silicon steel sheet, which is a magnetically conductive material. The permanent magnets are evenly distributed on the outer surface of the rotor iron core according to the number of magnetic poles, filled and injected with PBT material to form a whole, and the rotating shaft is installed in the inner hole of the rotor iron core. During the operation of the motor, an induced electromotive force is generated on the surface of the rotor, and the rotor core, permanent magnet and rotating shaft are equipotential bodies. Bearings are installed at both ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/04
CPCH02K1/04H02K1/2706H02K2213/03
Inventor 陈秀荣
Owner FGLS ELECTRIC CO LTD