SU980226A1 - Combined ac electric machine - Google Patents

Description

(54) ALTERNATED ALTERNATING ELECTRICAL MACHINE

The invention relates to a combined electric machines, for example, single-machine frequency converters and the number of phases, contactless machines with a combined pathogen, etc.

Combined electrical machines are known, on the stator of which there are two primary opposite-pole motor and generator windings, and on the rotor one single-type winding with which the voltage of the converted frequency 1 is removed.

The disadvantages of these machines are the complexity of the design and manufacturing technology due to the presence of two separate windings on the stator.

A combined electrical machine is also known, on the stator of which there is a combined winding, each phase of which is divided into two parts interconnected in series and connected to the secondary winding of the transformer, the primary winding of which is connected to the primary network 21.

The disadvantages of such machines - the complexity of the design due to the presence of a separate transformer and a large number of conclusions from the winding.

Closest to the proposed one is a combined electric machine with a three-phase combined stator winding with numbers of pole pairs connected in a triangle, the phases of which are divided into two parts and connected in series, the node connection points of the parts of each phase are connected to three10 phase networks, and the node points the interconnection of the phases is connected to the secondary winding of the transformer, the primary winding of which is connected to the same three-phase network 3. -

15

A disadvantage of the known device is the complexity of the design due to the presence of a separate transformer.

The purpose of the invention is to simplify the design and increase the use of

20 active materials by excluding a separate transformer.

This goal is achieved by the fact that the nodal points of connection between the phases are powered by additional

25 pole winding, laid in the slots of the stator with the combined winding.

FIG. 1 shows the wiring diagram of the combined stator winding

Claims (3)

30 and machine transformer; in fig. 2 the same, the proposed machine; Fig. 3 shows an example of the implementation of the combined stator winding of the proposed machine with p 1 and p 2; 4, the star and the EMF diagram of the winding (FIG. 3) for polarity p 1, the combined stator winding (FIG. 1) is connected in a triangle and the terminals of the C1-SZ phases are connected to the secondary winding of the transformer Tr Points of interconnection between the parts of phases A, B and C are connected to a three-phase network, to which the primary winding of the transformer is also connected. Through the terminals A. B and C, currents creating a magnetic field with polarity p flow through the combined winding and secondary winding of the transformer, currents C1 through the secondary winding of the transformer running through the combined winding through the terminals C1 - S3 flow through the combined winding of the stator The machine (Fig 2) is connected in the same way as the winding of the known device, but without a transformer. The secondary winding of the transformer is performed by an additional three-phase winding with a polarity of p (Fig. 2) - connected in a star and connected to the terminals C1 - S3 of the combined winding (the additional winding can also be connected in a triangle). When a combined obnokti connects terminals A, B and C to the three-phase network along the circuits of the combined and additional windings flow currents, creating a field F with polarity r. This field induces in the phases of an additional winding having the same polarity, the EMF, under the action of which, along the combined winding, the ki flow through the outputs 01 - C3, creating a field with polarity P - 2p. Thus, the additional winding is a secondary winding of a three-phase transformer with a rotating magnetic field, the primary winding of which is a combined winding, and its magnetic circuit is aligned with the magnetic circuit of the machine. FIG. Figure 3 shows an example of a combined stator winding of the proposed machine with p 1 and Pj 2 containing six 1-b coils. The upper row of arrows shows the direction of the currents when the winding is fed through terminals A, B and C with a three-phase current (for a moment of time when the current in phase A has an amplitude value, from where it can be seen that p; 1. The bottom row of arrows shows the direction of the currents when powering the winding through the terminals C1 - Sz (from the additional winding) with three-phase current (for the point in time when the current in the phase C1 has an amplitude value), from which it is clear that p 2. On the star and the diagram EMF (figure 4) for the polarity of p 1 the EMF vectors are assigned to the numbers of the coils. From the EMF diagram, it can be seen that at the terminals C1 - Sz, the F-field does not produce an EMF pole with p (the terminals C1-SZ are conventionally shown in Fig. 4 connected to each other). When powered, the windings from the network through the terminals A, B and C of the phase are turned on in parallel. When powering the winding through the terminals C1 - Sz from the additional winding, part of the phase turns on in series. An electric machine can be used, for example, as an asynchronous single-machine frequency converter and phase numbers 50/150 Hz, as a contactless machine with a combined pathogen, etc. In comparison with the known one, the proposed machine is simpler and has better utilization of active materials due to the absence of a separate transformer. Claims of the invention An alternating current combined electric machine comprising a phase rotor and a stator with a delta-connected three-phase aligned winding with numbers of pairs of poles 2, the phases of which are divided into two parts and interconnected in series, and the nodal points of connection of the parts of each phase. connected to the primary network, characterized in that, in order to simplify the design and increase the use of active. materials, an additional 2p pole three-phase winding is installed on the stator, and the junction points of the combined winding are connected to an additional 2p-pole three-phase winding. Sources of information taken into account in the examination 1.Popov V.I. Characteristics of asynchronous single-machine frequency converters. - Electricity, 1976, No. 4, p. 70 2. The UK patent number 1050018, cl. H 02 K 47/24, 1966. 3. Japanese Patent No. 51-2602, cl. H 02 K 19/12, 1976. cr L7 Cf Phage.Z g X FS / g