SU395949A1 - SINGLE-PHASE NONCONTACT SYNCHRONOUS GENERATOR - Google Patents

Description

one

Of (shaving refers to a (electric machines of alternating current, namely, alternators of normal and increased frequency).

In the known single-phase contactless generators, to increase the rigidity of the external characteristics, additional windings are placed on the main excitation winding through the use of reverse synchronous zero on the rotor. The presence of additional windings on the rotor complicates the manufacturing technology of the rotor and leads to a decrease in weight and energy indicators.

The proposed generator differs in terms of the fact that the output single-phase winding is made with the number of tar loles, the number of phases of the electrically combined rotor winding, and the rotor winding with a step equal to the pole division of the exciter.

Laying only one winding on the rotor, which simultaneously performs the functions of the output winding of the exciter and excitation winding of the generator, greatly simplifies the design and technology of manufacturing the rotor (the number of rectifying elements decreases), and increasing it with a step equal to the number of polar divisions of the exciter allows you to use back synchronous

field to increase the rigidity of the external characteristics of such a generator.

The drawing shows the electrical circuit of the proposed generator.

The proposed generator is a cascade connection of synchronous machines 1 2 combined in one magnetic core. The excitation winding 3 and the output single-phase winding 4 are located on the stator. On the rotor there is an electrically combined winding 5, made in the form of a multi-phase winding, closed through a half-wave rectifier 6.

During iodation, the voltage on the winding 3 of the excitation in the winding of the rotor 5 is induced by an electromotive force, which through the rectifier 6 feeds the same winding with a constant current. Rectified TQK, flowed through the rotor winding, creates a magnetic flux fixed relative to the rotor with the number of pole pairs p2 kmpi, where / C 1, 3, 5 ... P;

p1 is the number of pairs of poles of the synchronous machine 1;

t is the number of phases of the rotor winding; P2 is the number of pairs of poles of a synchronous machine 2.

Under the action of this flow, an emf is induced in the output winding 4. with frequency fs Pr-p.

When the generator turns on, the reverse synchronous field induces a load of 0: the rotor voltage of the rotor, which rectifies 6 with the rectifier 6: ILO (Coupled current proportional to the load current. Thus, the output single-phase winding of the generator with the number of pole pairs the rigidity of external characteristics.

Subject matter

A single-phase contactless synchronous generator, made in the form of a cascade connection of two synchronous machines combined in one magnetic core and having an electrically combined winding on the rotor, ai on the stator single-phase output winding and excitation winding, characterized in that, in order to increase energy and weight indicators and simplifying the manufacturing technology of the generator, the output single-phase winding is made with the number of pole pairs, iKpaTiHbiiM the number of phases of the rotor winding, and the rotor winding - with a step equal to pole division single phase output winding