SU150912A1 - Magnetic Gas Dynamic Alternator - Google Patents

Description

MAGNETIC-GAS DYNAMIC ALTERNATING CURRENT GENERATOR

It was announced on January 31, 1962 for the number 762088 / 24-7

to the Committee on Inventions and Discoveries at the Council of Ministers of the USSR Published in «Bulletin of inventions No. 20, 1962

Known magnetic-gas-dynamic alternating current generators have significant drawbacks: poor performance and low efficiency, due to poor gas conductivity. The increase in the latter is associated with an increase in the gas temperature and with the complexity of the design. Pulsed combustion of fuel allows the temperature to increase at certain times and use gas as an excitation system. In such a construction (ed. No. 141961), a gaseous rotor, in addition to a running floor, creates a constant stationary field. In this case, most of the energy of the current excited in the gas is spent on heating and other losses. In order for the magnetic field of the current in the gas to be entirely running, it is necessary for the current in the gas to flow in opposite directions in the length of two pole divisions. In order to increase the conductivity of the gas, it is necessary to carry out the flow of current in the conditions of the arc discharge.

To accomplish this task, in the proposed magnetic-gas-dynamic alternating current generator, the stator is made of a type of stator synchronous gear, but with a fixed core in place of the rotor and with an annular working chamber in the gap between the stator and the core. The camera is equipped with electrodes, between which electrical discharges are created, forming an alternating-pole excitation system. Discharges are moved along the chamber by a stream of gas supplied to the chamber. In this case, according to the invention, in such a magnetic-gas-dynamic generator, the electrodes of one side of the chamber are movable along the latter; electrical discharges

No. 150912-2 -

between the movable electrodes and the stationary electrode of the other side of the chamber have the character of arc discharges with currents of opposite directions.

These measures make it possible to better use the excitation current and increase the efficiency of the machine.

A magnetic system with a cylindrical gap between the stator and the core can be used, as well as a magnetic system with a flat annular gap between the stator and the core.

The invention is illustrated in the drawing.

FIG. 1 shows a partial longitudinal discharge of the generator; in fig. 2 - a system of rotating electrodes (view along arrow A).

The magnetic system of the proposed generator consists of a stator / with three-phase winding and located inside a stationary magnetic core 2.

Between them there is a gap forming an annular chamber for the passage of a gas stream. The gas enters the chamber in a tangential direction through the openings 3. The current in the gas is created by a system of electrodes 4 and S located at the ends. The electrode 4 is stationary and made in the form of a solid conductive ring. The electrodes 5 are in the form of segments separated by an insulator 6, and can rotate. They are applied through contact rings 7.

In order for the generator to work, an electric arc is ignited between electrodes 4 and 5. As the gas flows through the gap, the tangential component of the gas velocity will blow out the arc and carry the electrodes 5 along with it. The arc moves around the circumference and thereby creates a rotating magnetic field, which excites in the stator winding E. d. The arc rotation speed is stabilized by a small motor rotating the electrodes. If the generator is made on a magnetic system with a flat annular working chamber, the rotating electrodes move along the inner circumference of the chamber.

Subject invention

Claims (3)

1. Magnetogasdynamic alternator with a stator of the stator-type synchronous type, with a fixed core in place of the rotor and with an annular working chamber in the gap between the stator and the core equipped with electrodes, between which electrical discharges are formed, which form an alternating excitation system and move along the chamber a stream of gas supplied to the chamber, characterized in that, in order to better utilize the excitation current and increase the recoil of the machine, the electrodes of one side of the chamber The mobile discharges between them and the stationary electrode of the other side of the chamber have the nature of arc discharges with currents of opposite directions. 2. In the generator according to claim 1 the use of a magnetic system with a cylindrical gap between the stator and the core. 3. In the generator in. 1 application of a magnetic system with a flat annular gap between the stator and the core. In hell( rm / Lll FIG. 2