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Rotor of DC motor

A technology of rotor and rotor shaft, which is applied in the manufacture of stator/rotor body, magnetic circuit rotating parts, magnetic circuit characterized by magnetic materials, etc. It can solve the problems of uneven distribution of magnetic field lines of rotor magnetic field and easy falling off of magnetic tiles, etc. Achieve the effect of decreasing magnetic field reluctance, improving motor efficiency and reducing manufacturing cost

Inactive Publication Date: 2011-06-08
BEIJING SHENGSHI NENGCHUANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention uses an integral magnetic ring instead of the above-mentioned magnetic tile structure to overcome the problems that the magnetic tiles are easy to fall off and the magnetic field lines of the rotor field are not evenly distributed.

Method used

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  • Rotor of DC motor
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Embodiment Construction

[0014] figure 1 , is the overall view of the DC permanent magnet motor of the present invention, wherein the upper half is a partial cross-sectional view. 1 is the rotor shaft of the motor, 2 and 6 are the rotor bearings of the motor, and the rotor shaft 1 of the motor is fixed on the two motor end covers 3 and 5 of the motor casing through the rotor bearings 2 and 6 . 4 is the motor casing, and the motor end covers 3 and 5 are installed on the two ends of the motor casing 4, and the motor casing has cooling fins. 13 is the motor stator winding, 8 is the stator winding silicon steel lamination, the motor stator winding 13 and the stator winding silicon steel lamination 8 are fixed on the inner wall of the motor casing 4 by the fixing part 12 on the motor casing. 9 is the cylindrical overall magnetic ring on the motor rotor, 10 is the rotor yoke, the cylindrical overall magnetic ring 9 is fixed on the rotor yoke 10, 11 is the motor rotor sleeve, and the rotor yoke 10 passes th...

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Abstract

The invention provides a rotor structure of a permanent magnet motor, in particular a rotor structure of a DC brushless permanent magnet motor. In the rotor structure provided by the invention, a cylindrical integrated magnet ring is used to replace a multi-magnetic shoe structure of the conventional permanent magnet motor. A magnet ring in the invention is made of neodymium iron boron or ferrite as well as other permanent magnet materials commonly used in the permanent magnet motor. The invention has the advantages of overcoming the defects of easy shedding of the magnet shoe and nonuniform distribution of magnetic lines of force in the magnetic field of the rotor, improving the efficiency of the motor and reducing the heat generation of the motor.

Description

Technical field [0001] The invention relates to a motor rotor structure, in particular to a rotor structure of a DC brushless permanent magnet motor. Background technique [0002] At present, due to the simple structure, reliable performance and good speed regulation performance of the DC permanent magnet motor, it has been widely used in various electromechanical drive systems. With the development of clean energy vehicles, especially gasoline-electric hybrids, and the development and application of pure electric vehicles, further requirements are placed on drive motors. See CN20061003559.6, CN20061006323.0, 20071011329.8, the traditional DC permanent magnet motor uses NdFeB magnetic tiles on the rotor, and is fixed on the rotor shaft by bonding or sintering. The following problems exist during operation. When the motor is running at high speed, due to the strong centrifugal force, the structure is damaged and the magnetic tiles fall off. In addition, for the magnetic til...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/02H02K15/03
Inventor 张援朝左恒吴红松
Owner BEIJING SHENGSHI NENGCHUANG TECH DEV