CN203537091U - Double-salient pole double-squirrel cage outer rotor structure of stator permanent magnet double-rotor motor - Google Patents

Abstract

The utility model discloses a double-salient pole double-squirrel cage outer rotor structure of a stator permanent magnet double-rotor motor. The double-salient pole double-squirrel cage outer rotor structure is composed of an outer rotor body, outer squirrel cage strips, inner squirrel cage strips and end rings. The outer rotor body is an inner and outer double salient pole structure formed by laminating silicon steel sheets. An outer slot group and an inner slot group both composed of multiple through holes evenly distributed in the circumferential direction are punched in the outer rotor body. The through holes of the outer slot group are close to the outer periphery of a yoke part of outer salient poles in the radial direction and are positioned at the tangential central positions of every two adjacent salient poles of the outer salient poles in the tangential direction. The through holes of the inner slot group are close to the inner periphery of a yoke part of inner salient poles and are positioned at the tangential central positions of every two adjacent salient poles of the inner salient poles in the tangential direction. An outer squirrel cage strip is fixedly embedded in each through hole of the outer slot group. An inner squirrel cage strip is fixedly embedded in each through hole of the inner slot group. End parts of the inner and outer squirrel cage strips are fixedly connected with the end rings. The rotor loss is reduced and rigidity and strength are also improved.

Description

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

technical field

The utility model relates to a double-rotor motor, specifically the outer rotor structure of the double-rotor motor, which belongs to the field of motor design. the

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. the

Contents of the invention

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

The technical scheme adopted by the utility model is: the utility model is composed of an outer rotor body, an outer rat cage bar, an inner rat cage bar, and an end ring. 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, and the through holes of the outer slot group are radially close to the outer circumference of the yoke of the outer salient pole , located in the tangential middle position of two adjacent salient poles of the outer salient pole in the tangential direction, 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 located in the adjacent At the tangential middle position of the two salient poles, 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. The ends of the cage bar and the outer mouse cage bar are all fixedly connected to the end rings. the

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

Description of drawings

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

Fig. 2 is the structural assembly diagram of the dual salient pole double squirrel cage outer rotor proposed by the utility model;

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 ways

The structure of the double-salient double squirrel-cage outer rotor proposed by the utility model is shown in FIG. 1 . the

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. the

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

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. the

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. the

Claims (3)

1. A double salient pole double squirrel cage outer rotor structure of a stator permanent magnet double rotor motor, which is characterized in that it consists of an outer rotor body (1), an outer squirrel cage bar (2), an inner squirrel cage bar (3), Composed of end rings (4), the outer rotor body (1) is an inner and outer double-salient pole structure formed by lamination of silicon steel laminations. The outer rotor body (1) is punched with multiple through holes uniformly distributed along the circumferential direction Outer slot group (6) and inner slot group (7), the through hole of the outer slot group (6) is close to the outer circumference of the yoke of the outer salient pole in the radial direction, and is located at the tangential direction of the outer salient pole At the tangential middle position of two adjacent salient poles, the through hole of the inner slot hole group (7) is close to the inner circumference of the yoke of the inner salient pole in the radial direction, and is located at the tangent of the two adjacent salient poles of the inner salient pole in the tangential direction. To the middle position, each through hole of the outer slot group (6) is fixed with an outer mouse cage bar (2), and each through hole of the inner slot group (7) is fixed with an inner mouse cage bar (3), the ends of the inner and outer mouse cage bars (3, 2) are fixedly connected to the end rings (4). 2. The double salient pole double squirrel cage outer rotor structure of a stator permanent magnet double rotor motor according to claim 1, characterized in that: the communication between the inner slot group (7) and the outer slot group (6) Holes are arranged in adjacent yokes spaced between one or more salient poles. 3. The double-salient-pole double-squirrel-cage outer rotor structure of a stator permanent magnet double-rotor motor according to claim 2, characterized in that: the yoke in the middle of the two adjacent salient poles arranged with through holes, The number of through holes can be one or more.

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