CN103595159B - The double mouse cage outer-rotor structure of the double-salient-pole of a kind of stator permanent-magnet double-rotor machine - Google Patents

Abstract

The invention discloses a double salient pole double squirrel cage outer rotor structure of a stator permanent magnet double rotor motor. The inner and outer double salient pole structure is laminated. The outer rotor body is punched with an outer slot group and an inner slot group consisting of a plurality of through holes uniformly distributed along the circumferential direction. The through holes of the outer slot group are in diameter. Up close to the outer circumference of the yoke of the outer salient pole, tangentially located at the tangential middle position between two adjacent salient poles of the outer salient pole, and the through holes of the inner slot group are radially close to the inner circumference of the yoke of the inner salient pole , located in the tangential middle position between two adjacent salient poles of the inner salient pole in the tangential direction, each through hole of the outer slot group is fixed with an outer squirrel cage bar, and each through hole of the inner slot group An inner squirrel cage bar is fixedly embedded, and the ends of the inner squirrel cage bar and the outer squirrel cage bar are fixedly connected to the end ring; not only can the rotor loss be reduced, but also the rigidity and strength can be improved.

Description

Double-salient-pole double-squirrel-cage outer rotor structure of a stator permanent magnet double-rotor motor

technical field

The invention relates to a double-rotor motor, in particular to an outer rotor structure of the double-rotor motor, and belongs to the field of motor design.

Background technique

The structural feature of the double-rotor motor is that it has a stator and two inner and outer rotors. There are permanent magnets on the outer rotor of most dual-rotor motors. In addition to the problems of difficult fixing and heat dissipation, there is also the problem that the inner and outer magnetic fields are easy to affect each other. In order to overcome these problems, a stator permanent magnet dual rotor motor is proposed. The outer rotor of the stator permanent magnet dual rotor motor has no permanent magnets and no windings. It is a double salient pole structure. The magnetic field of the inner and outer motors is a non-uniform magnetic field type. To solve the problem of magnetic field coupling of internal and external motors, whether to decouple the magnetic fields of internal and external motors is the key to independent and precise control of internal and external motors. The inner and outer rotors of the double-rotor motor have a cylindrical structure, so solid steel materials are mostly used. Since the lamination structure cannot be used, the loss of the rotor is relatively large.

Contents of the invention

In order to overcome the shortage of large outer rotor loss in the prior art, the present invention proposes a double-salient-pole double-squirrel-cage outer rotor structure applied to a stator permanent magnet double-rotor motor.

The technical solution adopted by the present invention is: the present invention is composed of an outer rotor body, an outer squirrel cage bar, an inner squirrel cage bar, and an end ring. The upper punch has an outer slot group and an inner slot group consisting of a plurality of through holes evenly distributed along the circumferential direction. The through holes of the outer slot group are radially close to the outer circumference of the yoke of the outer salient pole. It is upwardly located at the tangential middle position of two adjacent salient poles of the outer salient pole, the through holes of the inner slot hole group are close to the inner circumference of the yoke of the inner salient pole in the radial direction, and are located at the tangential direction of the two adjacent salient poles of the inner salient pole. In the tangential middle position of the pole, an outer mouse cage bar is embedded and fixed in each through hole of the outer slot group, and an inner mouse cage bar is embedded in each through hole of the inner slot group, and the inner mouse cage bar and The ends of the outer mouse cage bars are all fixedly connected to the end rings.

The double salient pole squirrel cage outer rotor structure proposed by the present invention can not only reduce the rotor loss, but also improve the rigidity and strength of the double salient pole cylindrical lamination outer rotor structure.

Description of drawings

Fig. 1 is the double salient pole double squirrel cage outer rotor structure split diagram that the present invention proposes;

Fig. 2 is the structural assembly diagram of the double squirrel cage outer rotor with double salient poles proposed by the present invention;

Fig. 3 is an end view of the outer rotor body in Fig. 2;

In the figure: 1. Outer rotor body; 2. Outer cage bar; 3. Inner cage bar; 4. End ring; 5. Nut; 6. Outer slot group; 7. Inner slot group; 8. Silicon steel Lamination; 9. Outer circumference; 10. Inner circumference; 11. Outer salient pole; 12. Inner salient pole.

detailed description

The structure of the double-salient pole double squirrel-cage outer rotor proposed by the present invention is shown in FIG.

The structure of the outer rotor body 1 is shown in FIG. 3 , which is cylindrical and has a double salient pole structure inside and outside, and is formed by lamination of silicon steel laminations 8 . The outer rotor body 1 is punched with two groups of slots, which are the outer slot group 6 and the inner slot group 7 respectively, and the two groups of slots are composed of a plurality of through holes uniformly distributed along the circumferential direction. The through holes of the outer slot group 6 are close to the outer circumference 9 of the yoke of the outer salient pole 11 in the radial direction, and are located in the tangential middle position of two adjacent salient poles on the outer salient pole 11 in the tangential direction. The through holes of the inner slot group 7 are radially close to the yoke inner circumference 10 of the inner salient pole 12 , and are located in the tangential middle position between two adjacent salient poles on the inner salient pole 12 in the tangential direction.

As shown in Figure 1-3, each through hole of the outer slot hole group 6 is embedded with an outer mouse cage bar 2, fill the gap with resin or weld the outer mouse cage bar 2 with the outer rotor body 1 with non-magnetic solder Together to eliminate the vibration of the outer mouse cage bar 2, the outer mouse cage bar 2 ends are coated with insulating material and fixed with the end ring 4 and the nut 5. Each through hole of the inner slot hole group 7 is embedded with an inner squirrel cage bar 3, and the gap is filled with resin or welded together with the inner squirrel cage bar 3 and the outer rotor body 1 with non-magnetic solder to eliminate the inner squirrel cage Vibration of the bar 3, the end of the inner squirrel cage bar 3 is coated with insulating material and fixed with the end ring 4 with a nut 5. The outer mouse cage bar 2, the inner mouse cage bar 3 and the end ring 4 are all made of non-magnetic conductive materials. The outer mouse cage bar 2 and the end ring 4 form the outer mouse cage, and the inner mouse cage bar 3 and the end ring 4 form the inner mouse cage.

The through-holes of the outer slot group 6 can be arranged on the adjacent yokes on the outer salient pole 11, between one or more salient poles, and the through-holes of the inner slot group 7 can be arranged on the adjacent inner salient pole 12. In the yoke between two adjacent salient poles that are separated by one or more salient poles, the number of through holes can be one or more.

Since the adjacent salient poles of the inner salient pole 12 or the outer salient pole 11 are tangential to the middle side yoke position, the radial magnetic flux is less and is a leakage flux, so the outer rat cage bar 2 and the inner rat cage bar 2 are placed here. The cage bar 3 can minimize the influence of the mouse cage bar on the magnetic circuit. Both ends of the outer squirrel cage bar 2 and the inner squirrel cage bar 3 are coated with insulating material to prevent the squirrel cage bars from forming a closed loop, cutting the magnetic field to induce electromotive force during rotation, thereby increasing torque ripple. The insulating parts at both ends of the outer mouse cage bar 2 and the inner mouse cage bar 3 are respectively fixed with the end ring 4 with nuts to form a double mouse cage structure with a common end.

Claims (3)

1. null1. the double mouse cage outer-rotor structure of the double-salient-pole of a stator permanent-magnet double-rotor machine，It is characterized in that: by outer rotor body (1)、Outer squirrel-cage bar (2)、Interior squirrel-cage bar (3)、End ring (4) is constituted，Outer rotor body (1) is the inside and outside double-salient-pole structure being overrided to form by silicon steel laminations，Outer rotor body (1) upper punch is by the outer slotted eye group (6) formed by the most uniform multiple through holes and interior slotted eye group (7)，The through hole of outer slotted eye group (6) is diametrically near the excircle in the yoke portion of outer salient pole，The tangential centre position of adjacent two salient poles of evagination pole it is positioned on tangential，The through hole of interior slotted eye group (7) is diametrically near the yoke portion inner periphery of interior salient pole，The tangential centre position of adjacent two salient poles of convex pole it is positioned on tangential，Each through hole of outer slotted eye group (6) is embedded is fixed with an outer squirrel-cage bar (2)，Fix in each through hole of interior slotted eye group (7) and be embedded with an interior squirrel-cage bar (3)，The end of interior squirrel-cage bar (3) and outer squirrel-cage bar (2) is fixedly connected with end ring (4).
2. The double mouse cage outer-rotor structure of the double-salient-pole of a kind of stator permanent-magnet double-rotor machine the most according to claim 1, is characterized in that: the through hole of interior slotted eye group (7) and outer slotted eye group (6) is arranged in adjacent, to be spaced one or more salient pole centre yoke portion.
3. The double mouse cage outer-rotor structure of the double-salient-pole of a kind of stator permanent-magnet double-rotor machine the most according to claim 2, is characterized in that: being disposed with the yoke portion in the middle of the two adjacent salient poles of through hole, the number of through hole can be one or more.