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Permanent magnet synchronous motor

A technology of permanent magnet synchronous motors and permanent magnets, applied in synchronous machines, synchronous machine parts, electrical components, etc., can solve the problems of mechanical deformation of magnetic paths, magnetic flux leakage, and low utilization rate of permanent magnet materials, and achieve reliable structure, Avoid the effects of mechanical deformation

Pending Publication Date: 2018-01-09
河南全新机电设备有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are two types of permanent magnets embedded in the rotor of permanent magnet synchronous motors: surface-mounted and embedded; but for high-power permanent magnet synchronous motors with external permanent magnets, the magnetic fields of permanent magnets between adjacent two poles are easily connected directly, which will cause magnetic flux leakage , resulting in low utilization of permanent magnet materials; during the rotation of the rotor, the permanent magnets are subjected to centrifugal force relative to the direction of rotation, which easily causes the magnetic path to be squeezed and irreversible mechanical deformation occurs

Method used

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Embodiment Construction

[0011] Embodiments are described in detail in conjunction with the accompanying drawings,

[0012] A permanent magnet synchronous motor, which includes a rotor core 1, and a special-shaped cage bar 2 is arranged on the outer side of the rotor core along the rotor axial direction, and the bottom corner of the centripetal part of the special-shaped cage bar is stuck on the silicon steel sheet on the rotor core In the slot corresponding to the shape, the two ends of the special-shaped cage are fixedly connected with the end ring 4, and the permanent magnet 3 is inlaid between the special-shaped cage, and the magnetic properties of the permanent magnets between adjacent two poles are opposite. The polarities of the permanent magnets between the special-shaped bars are the same; the section of the special-shaped cage bars described in this embodiment is a hyperbola.

[0013] The magnetization direction of each permanent magnet stuck in the adjacent cage of the opposite sex is chamf...

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Abstract

The invention discloses a permanent magnet synchronous motor. The technical scheme is that the permanent magnet synchronous motor includes a rotor iron core; irregularly shaped cage strips are arranged on the outer side of the rotor iron core along the axial direction of a rotor. The bottom corner of a radial part of each irregularly shaped cage strip is clamped in a slot of a corresponding shapein a silicon steel sheet on the rotor iron core. Two ends of each irregularly shaped cage strip are connected with end rings fixedly and permanent magnets are embedded between the irregularly shaped cage strips. The magnetic properties of the permanent magnets between two adjacent poles are opposite. The magnetic properties of the permanent magnets between adjacent H-shaped irregularly shaped cagestrips in one polar zone are identical. The invention has beneficial effects that irreversible mechanical deformation due to extrusion of a magnetic path can be avoided effectively and structure reliability is realized.

Description

technical field [0001] The invention relates to a motor, in particular to a high-power permanent magnet synchronous motor. Background technique [0002] Permanent magnet motors have the advantages of low loss and high efficiency, and are used more and more widely today when energy conservation and environmental protection are increasingly valued. Such as: fans, water pumps, compressors, etc. in continuous, constant speed and unidirectional applications, ordinary asynchronous motors are gradually being replaced by permanent magnet motors due to the waste of electric energy due to efficiency, power factor and other reasons. At the same time, the operating speed of many industrial machines needs to be set and adjusted arbitrarily, but the accuracy of speed control is not high. Due to the advantages of small size, high efficiency and energy saving, permanent magnet synchronous motors are gradually becoming the main products in this field. [0003] At present, high-power permane...

Claims

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Application Information

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IPC IPC(8): H02K21/46H02K21/02
CPCY02T10/64
Inventor 尚勤贵尚金鸽尚金锋
Owner 河南全新机电设备有限公司
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