RU1816339C - Single-phase asynchronous gear motor - Google Patents

Abstract

The invention relates to electrical engineering, namely to single-phase asynchronous geared motors with distinctive poles. An object of the invention is to increase engine efficiency. The electric motor contains a housing, a package stato2. rotor gear pack, shaft, power winding, additional short-circuited winding, distinctive poles on the surface of which there are serrated combs, coils of two parts of the power winding that span two adjacent poles, coils of additional short-circuited winding. Due to mixing the combs of adjacent poles by half of the tooth division and the displacement of the tooth combs of each pair of poles relative to the axes of their poles by a quarter of the tooth division in mutually opposite directions, as well as the corresponding connection of the coils of the additional winding, the losses in the winding are reduced and, therefore, the efficiency is increased engine .3 ill. ate

Description

The invention relates to electrical engineering, in particular to single-phase asynchronous gear motors with distinctive poles.

An object of the invention is to increase the efficiency of an electric motor.

Figure 1 shows a longitudinal section of an engine; in FIG. 2 - cross section of the engine; Fig. 3 is a connection diagram of coils of an additional winding.

The engine consists of an aluminum casing 1, in which the stator package 2 is filled. The gear package of the rotor 3 is located on the shaft 4. The tooth pitch tz of the stator is equal to the tooth pitch of the rotor.

On the stator 2 are located the power winding 5 and the short-circuit winding 6., Along the perimeter of the stator 2 are evenly expressed poles 7, 8,

9,10,11.12,13 and 14, on the surface of which there are serrated combs 15, 16, 17, 18, 19, 20, 21 and 22. Coils 23, 24 and 25, 26 of two parts of the power winding 5, respectively, cover two poles 7, 8; 11, 12 and 9, 10; 13.14. One part of the winding 5 consists of coils, for example, 25 and 26, connected to the network through a capacitor.

Coils 27, 28 are located at the poles 7-14. 29, 30, 31, 32, 33, 34 of the short-circuited additional winding 6. which are interconnected according to the circuit shown in FIG. 3.

The tooth combs 15 and 16, 17 and 18, 19 and 20, 21 and 22, having the same polarity, are offset relative to each other by half. the lead-to-lead division, and the tooth combs 17, 21 and 18, 22 of the poles 9, 13 and 10, 14 of the second part of the power winding are offset from 00

ttl

ABOUT

With

with about

00

relative to the axes of their poles 9, 13 and 10. 14 by a quarter of the tooth division in mutually opposite directions, respectively, as shown in figure 2 by arrows A and B.

The engine operates as follows.

The coils 23, 24 and 25, 26 flow currents displaced in phase by a quarter of the period. They excite magnetic fluxes, which induce in the coils 27-34 EMFs of direct, reverse and zero sequence with frequencies, respectively), co + Zr, s - WZr.ftV-number of teeth and the angular speed of rotation of the rotor, and ) is the angular power frequency. When the tooth combs of two adjacent poles are shifted of the same polarity relative to each other by half of the tooth division, and also when the tooth combs 17, 21 and 18 are shifted, 22 of the second part of the winding relative to the axis of their poles 9, 13 and 10, 14 by a quarter of the tooth dividing in mutually opposite directions and when connecting the coils of the additional pole winding according to the scheme in Fig. 3, the sum of the direct and reverse emf with frequencies o) and o + Zr ik is equal to zero.

In a closed circuit of the additional winding 6, a zero-sequence current flows with a frequency ft) - Zr of LPG, which interacts with the magnetic flux of the power winding and creates an asynchronous moment. This moment drives the rotor at low speed.

n W (1-SZ) rpm

Zr

where Sz is the glide of the tooth fields,

f is the power frequency.

Claims (1)

The electric motor in comparison with the prototype has a higher efficiency. SUMMARY OF THE INVENTION A single-phase asynchronous geared motor comprising a gear stator with two windings, one of which is a power winding, and the other an additional and short-circuited, gearless rotor gear, the tooth pitch of the stator is equal to the tooth pitch of the rotor, the stator has pronounced poles with gear teeth , the poles are located evenly around the perimeter of the stator, so that they are in order to increase the efficiency of the motor, the power winding is made of the first and second equal parts, in one of which x a capacitor is connected, the number of poles is a multiple of eight, the tooth combs of two adjacent poles of the same name are offset relative to each other by half of the tooth division, and the tooth combs of each pair of diametrically opposite opposite poles of the second part of the power winding are offset relative to the axes of their poles by a quarter of the tooth division in mutually opposite directions, the pole coils of the power winding cover two poles with the opposite orientation of the tooth combs, the coils are additionally th winding on two adjacent poles of similar interconnected in series and opposite every pair of the said auxiliary winding coils on poles of opposite interconnected in series and in opposition.  1///;////////. Y / S /// S // y ///// 7 /// f 777777 //// S / S77 7 te / H