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Rotor structure of built-in permanent-magnetic motor

A permanent magnet motor, built-in technology, applied in the field of electric motors

Active Publication Date: 2016-05-18
HIWIN MIKROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Depend on Figure 1 to Figure 5 It can be seen from the known technology shown that whether the shape of the rotor is changed by the existence of space, or a part of the rotor is formed by non-magnetic materials, it is possible to control the magnetic flux density through the above-mentioned technology, so that the magnetic lines of force are more concentrated, so as to be compatible with Stator windings are more efficiently interlinked, and at the same time, the cogging torque is reduced by limiting the area where the magnetic flux travels. Even though many similar technologies have been disclosed in the known technology, there are still some improvements to be made. It is difficult to say that this known technology has been perfected

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  • Rotor structure of built-in permanent-magnetic motor
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  • Rotor structure of built-in permanent-magnetic motor

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Embodiment Construction

[0045] First, see Figure 6-Figure 8 As shown, the rotor structure 10 of the built-in permanent magnet motor provided in a preferred embodiment of the present invention is generally similar to the built-in permanent magnet motor of the known radiation (spoke) structure, mainly including There is a core part 20, a plurality of slots 30, a plurality of end slots 40 and a plurality of magnetic parts 50.

[0046] The core member 20 is made of magnetically permeable material such as silicon steel sheets using known techniques, and has a center of curvature, and extends axially with an appropriate length, forming a ring shape.

[0047] Each of the embedding grooves 30 is a straight groove with an appropriate groove width, and extends radially inward to an appropriate depth at equal angular intervals from the peripheral ring surface of the radially outer edge of the core member 20, respectively. The depth is less than the distance between the inner and outer diameters of the core pi...

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Abstract

The invention provides a rotor structure of a built-in permanent-magnetic motor. Multiple permanent magnets are embedded in an iron core member in a radiated way. One end, close to the centre of curvature of the iron core member, of each permanent magnet is located in a corresponding end groove space. In virtue of the end groove spaces, the advancing area of magnetic lines is restricted. Therefore, the magnetic lines are concentrated so as to increase magnetic flux density and increase counter electromotive force for enhancing thrust.

Description

technical field [0001] The invention relates to electric motors, in particular to a rotor structure of a built-in permanent magnet motor. Background technique [0002] Permanent magnet motor refers to the general name of the motor that replaces the mechanical rectification function of the carbon brush and commutator of the DC motor with the semiconductor switching function. In addition to the type that can be distinguished by the back EMF waveform, the permanent magnet is also installed on the rotor. Surface or embedded in the different space types of the rotor, divided into surface type, built-in type and embedded type, among them, the surface type permanent magnet motor is to stick the magnet on the surface of the rotor to obtain a larger magnetic flux Density, but because its positioning technology for the magnet is not ideal, it is easy to detach under the high-speed operation of the rotor, and it is necessary to strengthen the technology of making the magnet attach to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/26
Inventor 赖明志连家祥
Owner HIWIN MIKROSYST