RU1810960C - Inductor electric machine - Google Patents

Abstract

Usage: in induction electric machines with electromagnetic reduction: speed 7 / J 20 13, intended for use as power and information elements in low-power electric drives. SUMMARY OF THE INVENTION: The stator is made of parts 18 of a twisted split tape magnetic circuit made of electrical steel, connecting each adjacent newly expressed pole 3 along the surface of the outer diameter and forming teeth along the surface of the bore from radially distributed groups of longitudinal sheets making up these parts. The rotor 4 consists of a gear ring 20 formed of radially distributed groups of longitudinal sheets, and a frame made of electrical steel. 5 ill. , I / $ h

Description

The invention relates to electric machines, in particular to induction electric machines with a gear stator and a rotor, and can be used to create actuating and information elements for low-power electric drives.

The aim of the invention is to simplify the manufacturing technology of an induction electric machine.

In FIG. 1 and 2 show the transverse and longitudinal sections of the proposed induction electric machine in a cylindrical design; in FIG. 3 and 4 - its types in end execution; Fig. 5 is a circuit diagram for including windings.

The proposed induction electric machine comprises a stator 1 (FIGS. 2, 3) with teeth 2, the number of which is Zi, on newly expressed oversals 3 (FIGS. 1, 4), the number of which. Zo. gear rotor 4 (Fig. 1, 3) with the number of teeth 5 Za and a winding with the number of phases m in the form of coils 6-17 placed on the poles (Fig. 1, 4). In this case, the relation

Z0

where v

 | Zi-Z2 - v, m

m ± 2.

The stator is made of parts. 18 of a twisted split magnetic tape made of electrical steel, the number of which Zo, forming the teeth 2 of longitudinal sheets 19 radially distributed in groups of K, the number of which is KZi, and the rotor consists of a gear ring 20 formed of radially distributed groups of K . longitudinal sheets 21. the number of which is KZa, and the frame made of electrical steel. Figs. 1, 2 show a variant of the rotor frame 22 formed of transverse sheets for a machine in a cylindrical design, kg of Figs. 3, 4 embodiment of the rotor frame 23 formed from a twisted tape for an end-face machine; Figs. 1-4 show machines for which

Zo 12; Z2 46; m K 2.

The induction machine operates. As follows.. When the winding of the machine is connected to a current source 26 (Fig. 5) in parallel branches x m phases 27 using semiconductor elements (not shown), unipolar variables are formed. I AM

currents and - 16 with a phase shift by -.

According to the switching circuit of the coils of the current direction coil 24 (Figs. 1-4) at any time, such that the magnetic fluxes 25 generated by them are closed between adjacent poles. Current changes

0

5

0

5

0

5

0

5

0

5

And - Is with a frequency of 0) 1 cause the magnetic field to rotate in the air gap of the machine and are followed by a successive alternation of circuits 25 for maximum flow to occur. The path for closing the magnetic flux in each circuit is provided by the high conductivity of the parts 18 (Figs. 1, 3, 4) of the stator magnetic circuit in the winding direction and the rotor frame in the transverse direction for the structure of the transverse sheets 22 (Fig. 1, 2) or axial direction for a frame of twisted tape 23 (Figs. 3, 4). The teeth 2 (Fig. 2, 3) of the parts of the magnetic circuit of the stator 18 (Fig. 1. 4) and the teeth 5 of the gear ring of the rotor 20 are formed from KZi and KZa distributed in groups of K longitudinal sheets 19 and 21 and a magnetoelectric (not shown), dividing these groups. The number K of sheets grouped as teeth is determined by the required tooth width and CTQB thickness of the electrical steel. Due to the different number of stator teeth Zi and rotor Za, the conductivity of the air gap varies along the bore with the number of periods | Zi - Zal. During rotation of the magnetic field created by the currents of the source 26 (Fig. 5) with a frequency of o) 1, the rotor follows the field, striving at each moment of time to occupy a position in space in which the conductivity for the flows of excited magnetic circuits 25 (Fig. . 1 - 4) will be the largest. In this case, the rotor speed

wi

Z2

For this machine design, stamping or milling is not required in the manufacture of stator and rotor teeth, and winding can be laid before the teeth are distributed in open slots between the distinct stator poles. ..,

Rigidity of the stator and rotor is ensured by filling in the gaps between the elements of their magnetic cores and windings with adhesive electrical insulating varnishes or epoxies.

In this way, manufacturing techniques are simplified for the proposed induction electric machine.

In addition, the possibility of making teeth, the width of which can be reduced to the thickness of the sheets of electrical steel (K 1), allows to remove technological limitations on the manufacture of machines with high values of the coefficient of electromagnetic reduction with limited diameters of the bore.

Wr

Claims (3)

SUMMARY OF THE INVENTION 1. An induction electric machine comprising a stator with the number of teeth Zi at distinct poles, the number of which is Zo, the gear rotor with the number of teeth 22 and the m-phase winding in the form of poles placed on the poles, for which the relation where v m ± 2 IZi-Z2l -v, m characterized in that, in order to simplify the manufacturing technology, the stator is made of parts of a twisted tape magnetic circuit made of electrical steel, the number of which Zo, connecting each adjacent pronounced poles on the surface of the outer diameter and ob0 5 0 forming teeth along the surface of a bore from the number KZi of longitudinal sheets radially distributed in groups of K that make up these parts, and the rotor consists of a toothed ring formed of longitudinal sheets radially distributed in groups of K, the number of which is K Za, and a frame made with it from electrical steel. 2. The machine according to claim 1, characterized in that the rotor rotor is formed of transverse sheets and is connected to the toothed ring along the surface of its outer diameter; 3. Machine pop. 1, characterized in that. that the rotor rmo is formed of twisted tape and is connected to the ring gear by its end surface. Fug.J