CN101662202A - Magnetic field modulating type concentric magnetic gear transmission device in Halbach magnet structure - Google Patents

Abstract

The invention provides a magnetic field modulating type concentric magnetic gear transmission device in a Halbach magnet structure, which comprises a shell, an outer rotor and an inner rotor, whereinthe outer rotor and the inner rotor are installed in an inner cavity of the shell and are in a cantilever type; the inner rotor comprises an inner rotor iron core and a permanent magnet, which are installed on an output shaft of the inner rotor; the outer rotor comprises an outer rotor iron core and a permanent magnet, which are installed on an output shaft of the outer rotor; a magnetic modulation ring is arranged between the permanent magnet of the inner rotor and the permanent magnet of the outer rotor; and the magnetic modulation ring comprises an iron core block and is fixed on an end plate of the shell. The magnetic gear transmission device comprises two layers of air gaps, wherein an inner-layer air gap is formed between the inner rotor and the magnetic modulation ring, and an outer-layer air gap is formed between the outer rotor and the magnetic modulation ring. The magnet structure uses a Halbach array to replace the conventional radial structure, thereby improving the magnetic density distribution of the air gaps of the magnetic gear transmission device. Because the magnetic density of the air gaps approaches to sinusoidal distribution, the detent torque of the magnetic gear transmission device in the structure is greatly reduced, thereby decreasing the vibration and noise of the magnetic gear transmission device and improving the running efficiency.

Description

The concentric magnetic gear transmission device of Halbach magnet structure magnetic field modulation formula

Technical field

The present invention relates to a kind of magnetic gear transmission device, the concentric magnetic gear transmission device of particularly a kind of Halbach magnet structure magnetic field modulation formula.

Background technology

The magnetic gear transmission device has the following advantages than the mechanical gear transmission device: 1, bearing friction loss and core loss are only arranged, and energy loss is little, the efficient height; 2, the torque density height of unit volume correspondence is 10 times of common electric machine; 3, owing to there is not the machinery contact, thus no mechanical abrasion need not lubricate, the reliability height, the life-span is long; The vibrating noise that produces when 4, not having Mechanical Contact; Can not damage decelerator when 5, transshipping, and cut off drive connection at any time when overload, not only decelerator self can not damage, and can also protect prime mover.

Existing magnetic gear transmission device, its magnet structure are radial structure, and the air gap flux density waveform is not sinusoidal, and the harmonic wave that does not participate in transmitting torque in the air-gap field is more, the harmonic loss that produces unshakable in one's determination.

Summary of the invention

The objective of the invention is to solve the existing not sinusoidal problem of novel magnetic gear drive air gap flux density waveform, a kind of Halbach magnet structure magnetic field modulation magnetic gear transmission device is provided, because air gap flux density is near Sine distribution, greatly weakened the location torque of the magnetic gear transmission device of this structure, and then reduced the vibrations and the noise of magnetic gear transmission device, improved operational efficiency.

For achieving the above object, the present invention adopts following technical proposals:

The concentric magnetic gear transmission device of a kind of Halbach magnet structure magnetic field modulation formula comprises housing, is installed in cantilevered external rotor of housing inner chamber and internal rotor, it is characterized in that:

1. described external rotor is a cup rotor, external rotor iron core of the inboard fixed installation of inner cup-shaped sleeve, the circumferential uniform installation 2P of external rotor inwall unshakable in one's determination ₂Individual permanent magnetism magnetic pole constitutes the external rotor magnet ring, and adjacent permanent magnetism magnetic pole polarity is different, total like this P ₂To permanent magnetism magnetic pole, P ₂Be natural number, the cup end of outer end, connect the output shaft by bearings;

2. described internal rotor is the output shaft of another root by bearings, and is inner by internal rotor iron core of an internal axle sleeve fixed installation, circumferential uniform fixed installation 2P on the outer wall of internal rotor iron core ₁Individual permanent magnetism magnetic pole constitutes the internal rotor magnet ring, and adjacent permanent magnetism magnetic pole polarity is different, P ₁Be natural number;

3. form an annular chamber between described external rotor magnet ring and the internal rotor magnet ring, settle an adjustable magnetic ring in it, this adjustable magnetic ring is fixedlyed connected with housing end plug, and the adjustable magnetic ring is by P ₁+ P ₂Piece piece unshakable in one's determination and P ₁+ P ₂The piece epoxidized block connects into annular solid at interval;

4. each magnetic pole of external rotor magnet ring is formed to the Halbach in magnetic field magnet array in some, is direction polymerization inwardly, the magnetic field of directional divergence outwardly to magnetic field in described;

5. each magnetic pole of internal rotor magnet ring is made up of the Halbach magnet array in some export-oriented magnetic fields, and described export-oriented magnetic field is direction polymerization outwardly, the magnetic field of directional divergence inwardly.

6. form the internal layer air gap between internal rotor and the adjustable magnetic ring, form outer air gap between external rotor and the adjustable magnetic ring.

Each permanent magnetism magnetic pole of above-mentioned external rotor magnet ring uses n piece magnet, the magnetization of every magnet is M, number of poles is p, and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

$M_x\left(i\right)=M\cos \left[(1+p)\frac{360(i-1)}{2\mathrm{pn}}\right]$

$M_y\left(i\right)=M\sin \left[(1+p)\frac{360(i-1)}{2\mathrm{pn}}\right].$

Each permanent magnetism magnetic pole of above-mentioned internal rotor magnet ring uses n ' piece magnet, the magnetization of every magnet is M ', number of poles is p ', and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

${M_x}^{\′}\left(i\right)=M^{\′}\cos \left[(1-p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right]$

${M_y}^{\′}\left(i\right)=M^{\′}\sin \left[(1-p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right].$

The other side's magnetic pole logarithm by the modulation of adjustable magnetic ring, is satisfied in the magnetic field that above-mentioned inside and outside rotor produces.

Above-mentioned inside and outside rotor is concentric, can positive and negative direction rotation.

The present invention compared with prior art, have following conspicuous outstanding substantive distinguishing features and remarkable advantage: the present invention has adopted the adjustable magnetic ring between internal rotor and external rotor, compares with the traditional magnetic gear drive, has improved the magnet utilance.Compare with the concentric magnetic gear transmission device of novel radial magnet structure, harmonic wave is less in the air-gap field, can adopt less rotor core yoke thickness, even save rotor core, has reduced the harmonic loss of generation unshakable in one's determination.

Description of drawings

Accompanying drawing 1 is the structural representation of one embodiment of the invention.

Accompanying drawing 2 is the A-A cutaway view of inside and outside rotor among Fig. 1.

Accompanying drawing 3 is the Halbach magnet structure figure of inside and outside rotor among Fig. 1.

Embodiment

Details are as follows in conjunction with the accompanying drawings for a preferred embodiment of the present invention:

Referring to Fig. 1, Fig. 2 and Fig. 3, the concentric magnetic gear transmission device of this Halbach magnet structure magnetic field modulation formula comprises housing 1, is installed in the cantilever type external rotor and the internal rotor of housing 1 inner chamber.

External rotor is a cup rotor, inner external rotor iron core 4 of cup-shaped sleeve 3 inboard fixed installations, the circumferential uniform installation 2P of external rotor 4 inwalls unshakable in one's determination ₂Individual permanent magnetism magnetic pole constitutes the external rotor magnet ring, and adjacent permanent magnetism magnetic pole polarity is different, total like this P ₂To permanent magnetism magnetic pole, P ₂Be natural number, the cup end of outer end, connect the output shaft 11 by bearings.

Internal rotor is the output shaft 10 of another root by bearings, and is inner by internal rotor iron core 8 of an internal axle sleeve 9 fixed installations, circumferential uniform fixed installation 2P on the outer wall of internal rotor iron core 8 ₁Individual permanent magnetism magnetic pole constitutes the internal rotor magnet ring, and adjacent permanent magnetism magnetic pole polarity is different, P ₁Be natural number;

Form an annular chamber between external rotor magnet ring 5 and the internal rotor magnet ring 7, settle an adjustable magnetic ring 6 in it, this adjustable magnetic ring 6 is fixedlyed connected with housing end plug, and adjustable magnetic ring 6 is by P ₁+ P ₂Piece piece 6a unshakable in one's determination and P ₁+ P ₂Piece epoxidized block 6b connects into annular solid at interval.

Each magnetic pole of external rotor magnet ring 5 is formed to the Halbach in magnetic field magnet array in some, and interior is direction polymerization inwardly, the magnetic field of directional divergence outwardly to magnetic field.

Each magnetic pole of internal rotor magnet ring 7 is made up of the Halbach magnet array in some export-oriented magnetic fields, and export-oriented magnetic field is direction polymerization outwardly, the magnetic field of directional divergence inwardly.

Form the internal layer air gap between internal rotor and the adjustable magnetic ring, form outer air gap between external rotor and the adjustable magnetic ring.

Each permanent magnetism magnetic pole of external rotor magnet ring 5 uses n piece magnet, the magnetization of every magnet is M, number of poles is p, and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

$M_x\left(i\right)=M\cos \left[(1+p)\frac{360(i-1)}{2\mathrm{pn}}\right]$

$M_y\left(i\right)=M\sin \left[(1+p)\frac{360(i-1)}{2pn}\right].$

Each permanent magnetism magnetic pole of internal rotor magnet ring 7 uses n ' piece magnet, the magnetization of every magnet is M ', number of poles is p ', and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

${M_x}^{\′}\left(i\right)=M^{\′}\cos \left[(1-p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right]$

${M_y}^{\′}\left(i\right)=M^{\′}\sin \left[(1-p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right].$

The other side's magnetic pole logarithm by 6 modulation of adjustable magnetic ring, is satisfied in the magnetic field that inside and outside rotor produces.

Inside and outside rotor is concentric, can positive and negative direction rotation.

Ring is a Halbach magnet structure internal rotor permanent-magnetic body among Fig. 3, and each magnetic pole is made up of the Halbach magnet array in some (5 of this examples) export-oriented magnetic fields, and magnetic field is direction polymerization outwardly, directional divergence inwardly; Outer shroud is a Halbach magnet structure external rotor permanent magnet body, and each magnetic pole is by forming to the Halbach in magnetic field magnet array in some (3 of these examples), and magnetic field is direction polymerization inwardly, directional divergence outwardly.

Claims (5)

1, the concentric magnetic gear transmission device of a kind of Halbach magnet structure magnetic field modulation formula comprises housing (1), is installed in chamber cantilever type external rotor and internal rotor in the housing (1), it is characterized in that:

1. described external rotor is a cup-shaped rotor, the inboard fixed installation of inner cup-shaped sleeve (a 3) external rotor iron core (4), the circumferential uniform installation 2P of external rotor iron core (4) inwall ₂Individual permanent magnetism magnetic pole constitutes external rotor magnet ring (5), and adjacent permanent magnetism magnetic pole polarity is different, total like this P ₂To permanent magnetism magnetic pole, P ₂Be natural number; The cup end of outer end, connect an output shaft by bearings (11);

2. described internal rotor is the output shaft (10) of another root by bearings, and is inner by an internal axle sleeve (a 9) fixed installation internal rotor iron core (8), circumferential uniform fixed installation 2P on the outer wall of internal rotor iron core (8) ₁Individual permanent magnetism magnetic pole constitutes internal rotor magnet ring (7), and adjacent permanent magnetism magnetic pole polarity is different, P ₁Be natural number;

3. form an annular chamber between described external rotor magnet ring (5) and the internal rotor magnet ring (7), settle an adjustable magnetic ring (6) in it, this adjustable magnetic ring (6) is fixedlyed connected with housing end plug (2), and adjustable magnetic ring (6) is by P ₁+ P ₂Piece piece (6a) unshakable in one's determination and P ₁+ P ₂Piece epoxidized block (6b) connects into annular solid at interval;

4. each permanent magnetism magnetic pole of external rotor magnet ring (5) is formed to the Halbach in magnetic field magnet array in some, is direction polymerization inwardly, the magnetic field of directional divergence outwardly to magnetic field in described;

5. each permanent magnetism magnetic pole of internal rotor magnet ring (7) is made up of the Halbach magnet array in some export-oriented magnetic fields, and described export-oriented magnetic field is direction polymerization outwardly, the magnetic field of directional divergence inwardly;

6. form the internal layer air gap between internal rotor and the adjustable magnetic ring, form outer air gap between external rotor and the adjustable magnetic ring.

2, the concentric magnetic gear transmission device of Halbach magnet structure magnetic field modulation formula according to claim 1, each permanent magnetism magnetic pole that it is characterized in that described external rotor magnet ring (5) uses n piece magnet, the magnetization of every magnet is M, number of poles is p, and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

$M_x\left(i\right)=M\cos \left[(1+p)\frac{360(i-1)}{2\mathrm{pn}}\right]$

$M_y\left(i\right)=M\sin \left[(1+p)\frac{360(i-1)}{2\mathrm{pn}}\right].$

3, the concentric magnetic gear transmission device of Halbach magnet structure magnetic field modulation formula according to claim 1, each permanent magnetism magnetic pole that it is characterized in that described internal rotor magnet ring (7) uses n ' piece magnet, the magnetization of every magnet is M ', number of poles is p ', and the magnetizing direction of first magnet is along x axle positive direction, and then magnetization x, the y representation in components of the i piece magnet of Halbach magnet structure are as follows:

${M_x}^{\′}\left(i\right)=M^{\′}\cos \left[(1+p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right]$

${M_y}^{\′}\left(i\right)=M^{\′}\sin \left[(1+p^{\′})\frac{360(i-1)}{2p^{\′}{n}^{\′}}\right].$

4, the concentric magnetic gear transmission device of Halbach magnet structure magnetic field modulation formula according to claim 1 is characterized in that the magnetic field that inside and outside rotor produces, and by adjustable magnetic ring (6) modulation, satisfies the other side's magnetic pole logarithm.

5, the concentric magnetic gear transmission device of Halbach magnet structure magnetic field modulation formula according to claim 1 is characterized in that inside and outside rotor is concentric, can positive and negative direction rotation.

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