RU122461U1 - MAGNETIC TRANSMISSION - Google Patents

Abstract

Magnetic transmission, which has a low-speed rotor with a multi-pole system of permanent magnets, a high-speed rotor with its own system of permanent magnets and a stator concentrically located between them with a gap, consisting of ferromagnetic segments, evenly spaced along the circumference, and non-magnetic gaps between the segments, characterized in that the inner On the side of the high-speed rotor there is a multi-pole system of permanent magnets, concentric with a gap to which an additional stator is located, inside which an additional rotor is located concentrically with a gap, consisting of a ferromagnetic yoke with a system of permanent magnets on its outer surface.

Description

The proposed technical solution relates to electromagnetic mechanisms, and specifically to non-contact magnetic transmissions and can be used as a transmission device in mechanical systems with a long service life.

Known magnetic transmission (Atallah K.A novel high-performance magnetic gear // Magnetics, IEEE Transactions on. IEEE, 2001. Vol.37, No. 4. pp.2844-2846), which includes a concentric low-speed rotor; a stator made of ferromagnetic segments with non-magnetic gaps and a high-speed rotor. Permanent magnets of alternating polarity magnetized in the radial direction are located on the high-speed and low-speed rotors. One of the disadvantages of this magnetic transmission is the low gear ratio.

The technical task of the utility model is a multiple increase in the gear ratio of a known magnetic transmission.

The technical result, which consists in using the embedded design of the magnetic transmission, is achieved by the fact that in the known magnetic transmission having a low-speed rotor with a multipolar system of permanent magnets, a high-speed rotor with its system of permanent magnets and a stator concentrically located between them with a gap, consisting of ferromagnetic segments, evenly spaced along the circumference, and non-magnetic gaps between the segments, according to the utility model, additionally from the inside of the high-speed of the rotor there is a multipolar system of permanent magnets concentrically with a gap to which an additional stator is located, inside which an additional rotor concentrically with a gap is located, consisting of a ferromagnetic yoke with a system of permanent magnets on its outer surface.

In figure 1. A longitudinal section of a magnetic transmission is shown.

In figure 2. a cross section of a magnetic transmission is shown.

In figure 3. a cross-sectional view of a second stage of a magnetic transmission is shown.

In the magnetic system there are: a low-speed rotor 1 (Fig. 1, 2), consisting of a magnetic circuit 2 (Fig. 1) and a ring of permanent magnets 3 (Fig. 1); high-speed rotor 4 (figure 1, 2), consisting of a housing 5 (figure 1), a ring of permanent magnets 6 (figure 1), a magnetic circuit 7 (figure 1), a ring of permanent magnets 8 (figure 1); the stator 9 (figure 1, 2), which includes a housing 10 (figure 1) and lined ferromagnetic segments 11 (figure 1, 2); additional stator 12 (figure 1, 3), consisting of laden ferromagnetic segments 13 (figure 1, 3) and the housing 14 (figure 1); additional rotor 15 (figure 3), consisting of a shaft 16 (figure 1), a magnetic circuit 17 (figure 1) and a ring of permanent magnets 18 (figure 1). The entire magnetic transmission system is placed in a non-magnetic metal housing 19.

The main process underlying the principle of operation of the magnetic transmission in question consists in modulating the magnetic field in the air gap and in the interaction between the segments of the magnetic system.

As an example, we can consider one second stage of magnetic transmission (figure 3). In the absence of an additional stator 12, the permanent magnet rings 8 and 18 will create magnetic fields with a different number of pole pairs. Stable torque transmission is not possible in this case. For example, when you try to rotate the permanent magnet ring 8, the permanent magnet ring 18 will not receive stable rotation, and vice versa.

When an additional stator 12 is installed between the rings of permanent magnets 8 and 18 due to the presence of uniformly located ferromagnetic segments 13 having relatively high magnetic permeability, the magnetic field created by the ring of permanent magnets 8 will change its harmonic composition. In this composition, a spatial harmonic appears with the number of pole pairs equal to the number of pole pairs of the magnetic field excited by the ring of permanent magnets 18. Therefore, conditions are created for unidirectional interaction of magnetic fields. Accordingly, the magnetic field excited by the ring of permanent magnets 18 will also be modulated to form spatial harmonics in the magnetic field with the number of pole pairs equal to the number of pole pairs of the magnetic field excited by the ring of permanent magnets 8.

Thus, the gear ratio of the proposed device is defined as the product

Where

p ₁ - the number of pairs of poles on a low-speed rotor;

p ₂ is the number of pole pairs on the outer ring of permanent magnets of the high-speed rotor;

p ₄ is the number of pole pairs on the additional rotor;

q _{1 - the} number of ferromagnetic segments in the stator;

q ₂ - the number of ferromagnetic segments in the additional stator.

Claims (1)

A magnetic transmission having a low-speed rotor with a multipolar system of permanent magnets, a high-speed rotor with its system of permanent magnets and a stator concentrically located between them with a gap, consisting of ferromagnetic segments uniformly spaced along the circumference, and non-magnetic gaps between the segments, characterized in that with the inner on the high-speed rotor side there is a multi-pole permanent magnet system concentrically with a gap to which an additional stator is located, inside of which an additional rotor is located concentrically with a gap, consisting of a ferromagnetic yoke with a system of permanent magnets on its outer surface.