SU369659A1 - ZNAYAVS - ^ "t: kch - SKA * ^ bib-a ^^^ M. Kl.N 02k 3 / 20N 02k 19 / 16UDK 621.313.322 (088.8) - Google Patents

Description

one

The invention relates to the field of electrical engineering, in particular to the construction of medium and high power synchronous electric machines with a superconducting field winding.

Electrical machines are known that contain an inductor, measles with a winding and a compensation device made in the form of two coaxial cores rotating in different directions.

The disadvantage of such an arrangement is that the compensating device does not allow compensating for the action of the longitudinal component of the core reaction, which prevails, for example, during short circuits; In addition, the compensation device of such machines is not applicable to single-phase synchronous machines, since in this case the inverse field is not compensated.

In order to reduce the force effects of the reaction of the core on the superconducting winding and its mounting in the proposed synchronous electric machine, the compensation device is designed as a distributed compensation 06.WELD stationary relative to the inductor with a number of pole pairs equal to the number of pole pairs of the machine, which through the collector and brushes fixed fixed relative to the core, connected in series with the winding core, with a shift

phases of the collector winding relative to the winding core 180 °.

To reduce the voltage between the collector plates, connect the winding of the core with

compensation winding can be carried out through current transformers.

FIG. I shows an electrical circuit of a single-phase maschine with a consonant winding of the compensation and root windings; on

FIG. 2 is an electrical diagram of a single-phase machine with counter-winding compensation and root windings; in fig. 3 is an electrical diagram of a three-phase machine; in fig. 4- three-phase electrical circuit diagram with

current transformers.

The synchronous electric machine consists of an inductor 1 with a superconducting excitation winding 2 and a compensation winding 3. The winding 4 of the core is connected through brushes 5

with compensation winding 3.

The connection of the winding 4 of the core with the compensation winding 3 can be carried out through the current transformer fi (see Fig. 4). When the inductor rotates / with the superconducting excitation winding 2 and the compensation winding 3 in the fixed core winding, a variable emf occurs, and the load current of the core circuit is closed through the collector, brushes 5 and the compensation winding 5 of the inductor.

With a phase shift of the compensation winding 3 relative to the winding 4 core 180 °, the current of the compensation winding forms a counter magnetic field that compensates for the reaction field of the core at each time point for any type of current change, including uneven current in the phase windings of the core.

When the reaction is fully compensated, the load current does not create electromechanical forces acting on the superconducting field winding, while the opposing moments develop between the windings of the core and the compensation winding of the inductor.

The compensation of the core reaction will be complete if the effective numbers of turns of the phase of the winding 4 of the core and the compensation winding 3 of the inductor are equal to each other.

The number of brushes in the t-phase generator can be different (see Figs. 3 and 4), and the phases of the compensation winding of the inductor are connected either in a triangle or in a star.

Subject invention

Claims (2)

1. A synchronous electric machine with a superconducting field winding containing an inductor, a measles winding and a compensation device, characterized in that, in order to reduce the force effects of the core on the superconducting winding and its fasteners, the compensation device made in the form of a distributed compensation winding stationary relative to the inductor with a number of pole pairs equal to the number of pole pairs of the machine, which are connected in series through the collector and brushes fixed stationary relative to the core with the core winding, with the axis of the collector winding shifted relative to the winding core 180 °. 2. MA (a unit according to claim 1, characterized in that, in order to reduce the voltage between the collector plates, the coil of the core is connected to the compensation winding via a transformer, current surges.