SU1334299A1 - Cascade noncontact induction motor - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to dual power machines, and can be used as a source of electric power at a stable frequency at a variable frequency of rotation of the drive shaft in autonomous power supply systems, and also as an adjustable electric motor at a stable frequency of the supply voltage. The aim of the invention is to expand the scope by expanding the frequency range, increasing the allowable rotation frequency. A cascade contactless asynchronized machine consists of two electric machines 1, 2, the winding-free rotors 3,4 of which are mechanically interconnected. Each of the laminated stators 5, 6 contains three-phase core winding 7, 8, which are combined into a single winding by sequentially connecting the phases of the same name. One of the windings is connected to the three-phase network by clips. Single-phase stator field windings 9, 10 are connected to the corresponding phases of an adjustable two-phase alternating voltage source P. 1 Cp. f-ly, 1 ill. with fS (L i / cemtf with CO 4 y with

Description

one

The invention relates to electrical power supplies that can be used as a source of electric power of stationary frequency at a variable frequency of rotation of the drive shaft in autonomous power supply systems, and also as an adjustable electric motor with a stable frequency of the supply voltage.

The purpose of the invention is to expand the scope by expanding the frequency range, increasing the allowable rotation frequency and speed when adjusting the machine.

The drawing shows a cascade: an asynchronized machine having p rotors, a cross section.

A cascade contactless asynchronized machine consists of two electric masses 1 and 2, the rotors 3 and 4 of which are mechanically interconnected. Each of the laminated stators 5 and 6 contains one three-phase core winding 7 and 8, These windings are connected in series. One of them is connected to the three-phase network by clips, the stator single-phase windings 9 and 10 of the excitation are connected to the corresponding phases of the regulated two. Phase source 1 I variable voltage. Both rotors 3 and 4 are mounted on the same shaft 12, are made by non-pole non-winding windings 9 and 10 and rotors 3 and 4 and are offset from each other around the circumference by 1 / n floor: axial division.

Both the stators and the rotors of machines and 2 entering the cascade machine 40 can be made in the form of one common package. The anchor windings 7 and 8 of each of the machines are located in the sector 2n / n e. happy, and the single-phase windings 9 and iO of each of the machines are shifted relative to the corresponding core windings 7 and 8 at / T / k el. glad where k varies sequentially from I to p.

Inductive machines as well as machines with intracapsulated and externally closed flows can be used as electric machines included in the cascade contactless asynchronous machine.

The cascade contactless asynchronized machine operates in the following way (using the example of flow switched inductor machines).

To simplify the job description, the number of pole pairs of each electric machine is p 1 and the number of rotors is n 2,

When powering both the stator windings 9 and 10 of the excitation with direct current and when the rotors rotate with rotational frequency to rotate, the magnetic flux is alternating in time with respect to the plane of each turn. windings 7 and 8 cor for. an account of a periodic change in the magnetic resistance in the flow path and, accordingly, causes an alternating EMF in it. .

EMF ef (t) in each phase of the root winding 7 for the first machine

20

ef / t) E sinwt, for the second machine 2

ef (b)

 U t.

When powering both stator excitation windings with alternating currents.

H, {.

 1g sinw, .t;

 about t I - COS W.t

to I

the resulting EMF in each phase e, formed by the corresponding core windings, has a frequency equal to the sum (difference) of the frequencies w and w-:

e (t) e, (t) + 65 (t)

X ainut -w) t;

EoSinWrt

Epcoswpt Cosiot EoCos ((t) e, (t)

-F scoswt

+ to) t.

+ e, (t)

+ .Oesh t -sin (ot

Thus, the proposed cascade contactless asynchronized machine can be designed for higher rotational speeds, has a fast response speed and a higher power factor, since it does not contain windings on the rotor.

Claims (2)

1. A cascade contactless asynchronized machine containing p (p 1) of electrical machines whose rotors are mechanically interconnected, and the stators are connected to one t-phase core winding and one single-phase winding connected to a p-phase adjustable source, about l and h a-yu so that. 31334299 the purpose of expanding the scope right now By increasing the frequency range, increasing the allowable rotational speed and machine speed, the rotors are made without wires, the rotors of neighboring machines and single-phase windings are offset from each other by 1/5 pole division, the same phase of the main windings of all machines are connected in series. 2. A machine according to claim I, characterized in that the rotors and stators of electric machines are made in the form of one common package, the main windings of each machine are located in sector 2 I / n of electrical radians, and the single-phase windings of each of the machines are offset relative to the corresponding root winding on T / k electrical radians, where k varies in sequence from 1 to p.