SU864461A1 - Three-phase static ferromagnetic frecyency doubler - Google Patents

Description

(54) THREE-PHASE1M1 STATIC FERROMAGNETIC FREQUENCY DOUBLE FREQUENCY

one

The invention relates to electrical engineering, in particular to static devices, designed to convert a three-phase sinusoidal voltage of one frequency into a three-phase current of double frequency.

Three-phase static ferromagnetic frequency doublers are known, containing a three-phase planar magnetic system with six rods connected together by two frames, the cross section of which is twice as large as the cross section of one rod. Each terminal contains coils of the output winding and the bias winding with direct current. Adjacent pairs of rods are covered by the primary winding, and the middle phase winding is performed with the number of turns 5-8% less than that of the extreme phases 1.

The disadvantage of this device is the large weight of the magnetic circuit and low efficiency.

Also known are three-phase static ferromagnetic frequency doublers, containing a spatial six-core magnetic circuit with hexagonal VITELMI frames, with this adjacent pair of rods with output coils located on them

The windings and bias windings are covered by the primary winding coil, and are fixed in pairs between the ends within the straight sections of the RM, the cross sectional area of the KOTOfaix refers to

2S-VT 2.

 The disadvantage of this device is a large one in, ec rm, which is

10 gamu cannot be effectively used as energy generators of the output harmonics, the increased winding current of the magnetization, which in turn leads to a decrease in efficiency.

15

The purpose of the invention is to reduce the weight of the frequency doubler and increase its efficiency.

This goal is achieved by the fact that in a three-phase frequency doubler,

20 containing a six-core magnetic core, laminated rods are made U-shaped with wedge-shaped ends, having an angle of 60 at the apex, and docked with each other

25 sides of the wedge-shaped ends in the form of a six-pointed star.

Additionally, the sides of the wedges are of a different size and are joined to each other by one-dimensional

thirty . by the parties.

FIG. 1 shows a connection diagram for the windings; in fig. 2 shows the structure of the magnetic circuit with U-shaped rods evenly spaced around the circumference. And the ends of which are in the form of a wedge of various sides with an angle of 60 ° at the top; in fig. 3 - a doubler structure with U-shaped rods, whose side planes of the wedge-shaped ends have different angles of inclination with respect to the lateral surfaces of the rods.

Three-phase static ferromagnetic frequency doubler contains a six-core magnetic circuit 1-6, the input terminals 7 and the output - 8. The coils of the primary winding 9-11 cover pairwise adjacent rods of the magnetic circuit. The coils winding podpomnivania 12 - 17 are interconnected counter. The coils of the secondary winding 18 - 23 are connected in pairs in opposite directions.

The device works as follows.

All coils of the respective windings are made with the same number of turns, and all coils 12-17 of the sub-magnetisation windings are connected in series. The principle of operation of the device is based on the phenomenon of generation of higher harmonics in a magnetic circuit, saturated, variable and permanent magnetic fields and the allocation of double frequency in the system of secondary windings. The rods 1-6 are made in the U-shaped way of bending their ends, which are made in the form of an equilateral Q-line with an apex angle. The cores with the windings on their middle part are evenly spaced around the circumference, and the wedge-shaped rods, in contact with each other, are combined into two nodes and perform the function of the RM.

In the second embodiment, the side planes of the wedge-shaped ends of the U-shaped rods 1-6 have different angles of inclination to the side surfaces of the rods. The rods are interconnected so that the plane of the wedges with the same angles of inclination are adjacent to each other. Due to this, the distance between adjacent rods 1 and 2, Zi 4, 5 and 6 is obtained less than the distance between rods 2 and 3, 4 and 5, 6 and 1. The primary winding coil spans two adjacent rods that have a smaller distance between them. In this way, the weight of the primary winding is reduced and the energy loss in it is reduced.

Claims (2)

1. Three-phase static ferromagnetic frequency doubler, containing a six-core magnetic core, . On each rod of which the coils of the secondary winding and the bias winding are located, and on each pair of adjacent rods there are coils of the primary winding, so that, in order to reduce weight and increase efficiency, the laminated rods are made -shaped with wedge-shaped ends, having an angle of 60 ° at the top, and docked with each other by the sides of the wedge-shaped ends in the form of a six-pointed star. 2. A duplexer in accordance with claim 1, characterized in that the sides of the wedges are of different sizes and are joined to each other by one-dimensional sides, Sources of information taken into account in the examination  1. Bamdas A.M. Ferromagnetic frequency multipliers. M., “Energie, 1968, p. 37. 2. USSR author's certificate in application number 2674118 / 24-07, cl. H 02 M 5/16, 10/16/78.