SU836731A1 - Electric machine with exciter - Google Patents

Description

(54)

ELECTRIC MACHINE WITH AIR

The invention relates to electric machines, namely, large synchronous electric machines or electromagnetic couplings with exciters. A known electric machine with an exciter comprising an inductor with an excitation winding. Measles and a generator-pathogen in the form of a machine of current ij. The disadvantage of such a machine is the presence of sliding contacts, excitations of bodies, which limits the service life and reliability of the unit. An electrical machine is also known with a pathogen containing an inductor with an excitation winding, measles, an inductor of the exciter with its excitation winding and magnetic core of the exciter core 2. This technical situation is closest to the invention according to the technical essence and the achieved result. The disadvantage of such a machine is the presence of a rectifier, which leads to output voltage pulsations and a decrease in the stability of the torque on the shaft of the machine. The presence of rectifiers also limits the excitation current of the machine, and thus the power. The aim of the invention is to improve the shape of the output voltage and the stability of the torque of the machine. This goal is achieved by the fact that the exciter magnetic core is made of two coaxial rings, forming poles connected to one end by a jumper, between the poles there is an annular excitation winding of the exciter, on one of the annular poles of the magnetic circuit there is an annular hollow casing filled with liquid metal isolated from the magnetic circuit and solenoid. hermetically sealed at the ends with electrically conductive rings, one of which is isolated from the magnetic circuit, and the other is electrically connected to it, and both rings, Connected to the exciter winding, on the other pole of the magnetic circuit along the circumference are evenly made teeth, between the magnetic poles with gaps there is an annular measles, made of electro- and magnetic-conductive material, on the cylindrical surface of which the second pole is installed

an insulated annular casing with liquid metal and end conductive rings, one of which is insulated from the core and the other is electrically connected to it, the specified conductive rings are connected to the excitation winding of the machine, on the oppositely-shaped cylindrical surface of the core are uniformly circumferentially teeth.

Fig, 1 shows the proposed machine, longitudinal section; figure 2 - pathogen, cross section.

The electric machine contains an annular magnetic circuit 1 excite, an annular winding 2 excitation. At the pole 3 of the magnetic circuit 1 is installed a hollow insulated annular skin-x 4 with liquid metal 5 inside it. Electrically conductive rings b and 7 are tightly installed at the ends of the casing 4, one of which is isolated from the magnetic core 1 and the other is electrically connected to it. Both rings b and 7 are connected to the winding 2, At the pole 8 of the magnetic circuit 1 along the circumferential tee, teeth 9 are uniformly made. Between the poles 3 and 8; Ring bark 10 made of electro- and magnetically conducting material is placed. A second annular casing 11 with liquid metal 12 and frontal electrically conducting rings 13 and 14, one of which is isolated from the core 10, and the other i is electrically connected to it i, is mounted on the bark 10 on the side of the toothed pole 8. Both rings 13 and 14 are connected to the excitation winding 15 of the machine. On the other cylindrical surface, the core 10 is made uniformly around the circumference teeth 16,

When the core 10 rotates, a residual magnetic flux creates a coupling of its teeth 16 with an annular layer of liquid metal 5. The latter rotates with a certain slip of m relative to the core 10. Due to this, an unimolar emf is induced in the annular layer of the metal body. The EMF current flows in the excitation winding 2 and a process of self-excitation is in progress. At the same time, the metal layer 12 of the casing 11 is braked by a magnetic field emerging from the teeth 9 of the inner annular pole 8 of the magnetic circuit 1, thereby induced in the metal layer 12 of the casing AND the EMF 5T decreases and the EMF is induced in the core 10, it determines. the presence of current in the circuit of the winding 15 excitation machine. As the magnetic flux increases, the exciter increases. Since the braking effect and the metal layer 12 in the housing 11 remain almost unmovable (only slips), then, rotating, rotates, intersects the magnetic field, and is induced in it.

increasing unipolar emf. If a smooth magnetic conductor ring is placed in the casing 11, then it will rotate synchronously with respect to the fixed pole 8, If a magnetic conductor ring with teeth is placed in the casing 11, then at a sufficiently large flow it will remain stationary when its teeth coincide with the teeth the 8 poles of the magnetic circuit 1; In this case, the maximum possible emf will be obtained, At a given rotational frequency and a given magnetic flux,

Claims (1)

The proposed electric machine has an improved output voltage form and a stable torque on the shaft due to the fact that the use of rectifiers is not required for self-excitation in this machine, which eliminates the ripple of the excitation current and the ripple output voltage. Invention Formula An electrical machine with a pathogen containing an inductor with an excitation winding, measles, an inductor of the exciter with an excitation winding, and a magnetic conductor, measles of the exciter, characterized in that, in order to improve the shape of the output voltage and stability, the exciter magnetic conductor is made of two coaxial rings forming poles connected at one end by a jumper, an annular excitation winding is placed between the poles of the exciter, an annular hollow casing filled with a liquid is mounted on one of the annular poles of the magnetic circuit. Kim metal, insulated from the magnetic circuit and connected tightly along the ends with electrically conductive rings, one of which is insulated from the magnetic conductor, and the other connected electrically to it, and both rings are connected to the winding of the exciter, at the other pole of the magnetic conductor is equal (3 teeth are made, between the poles of the magnetic circuit with gaps there is an annular measles, made of electro- and magnetic-conductive material, on the cylindrical surface of which a second isolate is mounted on the gear pole side molded annular casing with liquid metal and end conductive rings, one of which. isolated from the core, and the other is electrically connected to it, the specified conductive rings are connected to the excitation winding of the machine, and the teeth are uniformly distributed on the opposite cylindrical surface of the core. Sources of information taken into account in the examination 1, Petrov G, N, Electric machines 4 P. M., SEI, 1963 / s, 402, 2, Japan Patent 49-23646, cl. 55 B 1, 1974,  /about fug. f Aa FIG. 2