RU1793518C - Single-phase induction gearmotor - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase efficiency. The engine consists of a non-magnetic casing 1, in which four gear packages 2-5 with poles 6-9 are located. The poles and prongs of all packages 2-5 match. On the part of poles 6-9, coils 10-17 are placed, connected in series and in opposite directions. At the other poles, short-circuited turns 18, 19 are located. Each phase consists of two packages, the coils of which are connected in series and counterclockwise. The rotor packages 21-24 related to one phase are displaced relative to each other by half of the gear division, and the pair of rotor packages 21-24 of one phase is shifted relative to the pair of packages 21-24 of the other phase by a quarter of gear division. The electric motor can be used in electrical actuating mechanisms of automation systems. 2 ill.

Description

sixteen

ate

WITH

The invention relates to low-power electric machines and can be used to create low-speed asynchronous electric drives of operating mechanisms.

An object of the invention is to increase engine efficiency.

In FIG. A single-phase asynchronous gear motor is shown in longitudinal section, in FIG. 2 - the same, cross section.

The engine consists of a non-magnetic housing 1, in which four gear packages 2-5 are located. Each of the gear packages 2-5 has poles 6-9. The teeth (not shown) and poles 6-9 of packets 2-5 coincide. At two opposite poles 6 and 8 of each package, windings 10 and 11 are located, which are interconnected in series and in accordance. Each phase consists of two gear packages with windings. For example, phase A consists of packages 2 and 3 with windings 10, 11 and 12, 13, respectively phase B of packages 4 and 5 with windings 14, 15 and 16, 17. The windings of one phase 10, 11 are connected to windings 12,13 sequentially and counterclockwise, as a result of which the magnetic fluxes excited by them in packets 2 and 3 are directed oppositely. Similarly, the windings of the other phase 14, 15 are connected in series and counter to the windings 16, 17. The magnetic fluxes of these windings in packets 4 and 5 are directed oppositely. Free of winding poles 7 and 9 of all four packages 2,3,4,5 covered by a single short-circuited turns 18,19 of electrically conductive material. On the shaft 20 are gear packages 21-24 of the rotor. The number of teeth of packages 21-24 is equal to the number of teeth of packages 2-5. Packets 21, 22, as well as Packages 23 and 24, related to one phase, are offset relative to each other by half of the tooth division. The pair of packets 23, 24 of one phase is offset from the pair of packets 21.22 of the other phase by 1/4 of the tooth division.

The principle of operation of such an engine is as follows,

When the currents of the phases 10-13 and 14-17 flow, shifted in time by a quarter of the period, flowing through packets 2, 3 and 21.22, as well as A, 5 and 23, 24, magnetic fluxes flow in opposite directions. These streams contain forward, reverse, and zero trace components. The sum of the EMF induced in the short-circuited turns 18 and .19 by the forward and reverse streams, due to the on-switching of the windings 10, 11 and 12, 13, as well as

14, 15 and 16, 17, is zero. EMF in short-circuited turns 18 and 19 induce tooth flows with zero follow, which under all packets

245 are in-phase due to the displacement of the packets 21, 22 and 23, 24 by half of the tooth division, and also because of the displacement of the pair of packets 23.24 relative to the pair of packets 21, 22 by 1/4 of the tooth division. Squirrel cage current

turns 18 and 19 from the zero-sequence EMF changes with frequency (w - 2g w%) and interacts with the magnetic field of packets 2, 3, 4, 5 creating an asynchronous torque that drives the rotor

low angular velocity

(and

aa - Ј (1 - Sz)

where is the angular power frequency; 2.1 - the number of teeth of the rotor;

Sz is the slip equal to Sz

O) - 7z (O2

(and

In such an engine between the windings

Yu, 11, 12, 13, 14, 15, 16, 17 and short-circuited turns 18, 19 there is no direct transformer connection. There are no electric losses in the turns 18, 19 from the currents caused by this connection, which

provides increased engine efficiency. The connection between the windings 10,11,12.13,14,15, 16, / 17 and the turns 18, 19 is carried out by means of a windingless gear rotor acting as a magnetic modulator

gender

The invention allows to increase the efficiency in comparison with the prototype by eliminating the transformer coupling of windings and short-circuited turns.

.

Claims (1)

SUMMARY OF THE INVENTION Single-phase asynchronous gear motor comprising a stator and a windingless rotor, each of which made of four gear packages spaced along the axis, the tooth pitch of the stator is equal to the tooth pitch of the rotor, the gear packages of the stator are made with distinctive poles and with windings of two phases, the poles and prongs of all four stator packets coincide, coinciding the poles of all stator packets are covered by single short-circuited turns of electrically conductive material, with the exception that, in order to increase the efficiency of the motor, the windings of each phase are located on two adjacent stator packets and are connected to each other in series and in opposite, packets single phase rotors are offset from each other by half the tooth division, and the pair of rotor packets of one phase is offset by a quarter of the tooth division relative to the pair of rotor packets of the other phase. Ph g z