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Mixed-excitation high-efficiency motor based on Halbach array

A hybrid excitation and motor technology, applied in the field of power systems, can solve the problems of low power density, large pulsating torque, and large core loss.

Inactive Publication Date: 2012-01-11
李贵祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the conventional permanent magnet motor is running at high speed or ultra high speed, the core loss is very large, which leads to a great reduction in the efficiency of the motor; in addition, the pulsating torque of the conventional permanent magnet motor is relatively large; at the same time, it is affected by the air gap magnetic field , the power density is small, which limits its application in high power density micro motors

Method used

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  • Mixed-excitation high-efficiency motor based on Halbach array
  • Mixed-excitation high-efficiency motor based on Halbach array
  • Mixed-excitation high-efficiency motor based on Halbach array

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] see figure 1 , a radial hybrid excitation high-efficiency motor based on Halbach array, mainly composed of Halbach array outer magnetic ring (1), Halbach array inner magnetic ring (1.1), iron core (2), winding (3), rotor yoke (4) , stator frame (5), rotating shaft (6), casing (7), front end cover (8), rear end cover (9), commutator (10), brush (11), bearing (12), wiring Box (13), fan (14), it is characterized in that: Halbach array magnetic ring is made up of radial permanent magnet and tangential and / or oblique permanent magnet, and the S pole and N pole of magnetic ring are arranged alternately, and the magnetic pole direction is The magnetic pole arrangement direction of the radial outer magnetic ring and the inner magnetic ring is the same, and the magnetic ring is fixed on the rotor yoke; 4 or more evenly distributed annular magnetic pole direction is the radial iron core winding, located on the outer magnetic ring Between the magnetic ring and the inner magnetic ...

no. 2 example

[0039] see figure 2 , a multi-stage radial hybrid excitation high-efficiency motor based on Halbach array, mainly consists of Halbach array outer magnetic ring (1), Halbach array inner magnetic ring (1.1), iron core (2), winding (3), rotor yoke ( 4), stator frame (5), rotating shaft (6), casing (7), front end cover (8), rear end cover (9), commutator (10), electric brush (11) bearing (12), Junction box (13), fan (14) form. There are two sections (pieces) of outer magnetic ring with radial direction of magnetic pole, two sections (pieces) of inner magnetic ring with radial direction of magnetic pole, and two sections (pieces) of iron core winding with radial direction of magnetic pole evenly distributed in ring shape. . The outer magnetic ring is fixed on the casing, the inner magnetic ring is fixed on the stator frame, and the stator frame is fixed on the rear end cover. The iron core winding arranged between the outer magnetic ring and the inner magnetic ring is fixed on ...

no. 3 example

[0041] see image 3 , an axial hybrid excitation high-efficiency motor based on Halbach array, mainly composed of Halbach array right magnetic ring (1.2), Halbach array left magnetic ring (1.3), iron core (2), winding (3), rotor yoke (4) , stator frame (5), rotating shaft (6), casing (7), front end cover (8), rear end cover (9), commutator (10), brush (11), bearing (12), wiring Box (13), fan (14) form. The Halbach array magnetic ring is composed of radial permanent magnets and tangential and / or oblique permanent magnets. The S poles and N poles of the magnetic ring are arranged alternately. The magnetic poles of the left magnetic ring and the right magnetic ring with the magnetic pole direction in the axial direction are arranged in the same direction. , the magnetic ring is fixed on the stator frame, and the stator frame is fixed on the casing; 4 or 4 core windings with an evenly distributed annular magnetic pole direction as the axial direction are located between the left ...

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Abstract

The invention relates to a mixed-excitation high-efficiency motor based on a Halbach array, mainly comprising magnetic rings of the Halbach array, iron cores, windings, a rotor yoke, a stator frame, a rotating shaft, a case, a front end cover, a rear end cover, a commutator and an electric brush, wherein the two permanent magnetic rings of the Halbach array with S poles and N poles being arranged at interval are fixed on the rotor yoke; four or more than four iron cores and windings are arranged between the two magnetic rings and are fixed on the stator frame or the case; or the two magnetic rings are fixed on the stator frame or the case, and the iron cores and the windings arranged between the two magnetic rings are fixed on the rotor yoke; the quantity of magnetic poles of one magnetic ring is 1.5 times than the quantity of the magnetic poles of the iron cores and the windings; the rotating shaft is provided with the commutator and the electric brush; when a rotor rotates by certain angle for one time, the adjacent magnetic poles of the iron cores and the windings change the directions of the S poles and the N poles alternatively for one time; and the S poles and the N poles of the iron cores and the windings generate attractive force and repulsive force respectively with the two magnetic rings, so that the purpose of converting the electromagnetic energy into the mechanical energy is achieved.

Description

technical field [0001] The invention relates to a power system, in particular to a hybrid excitation high-efficiency motor based on Halbach array. technical background [0002] At present, modern permanent magnet motors are developing in the direction of high speed, high efficiency and high power density. However, when the conventional permanent magnet motor is running at high speed or ultra high speed, the core loss is very large, which leads to a great reduction in the efficiency of the motor; in addition, the pulsating torque of the conventional permanent magnet motor is relatively large; at the same time, it is affected by the air gap magnetic field , the power density is small, which limits its application in high power density micro motors. In view of these shortcomings of conventional permanent magnet motors, as early as 1979, K. Halbach, a physicist at Berkeley Laboratory in the United States, proposed a novel design method for the construction of permanent magnets,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K3/04
Inventor 李贵祥
Owner 李贵祥
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