Toroidal design of laminated plates of the magnetic circuit with the electrical windings


(57) Abstract:

Toroidal design of laminated plates of the magnetic circuit with the electrical windings. Use: transformers and electrical machines. The essence: a design in which the magnetic circuit and windings are made of laminated cross-section along the involute plates of constant thickness. Effect: improving technology and expanding the area of use. 1 C.p. f-crystals, 5 Il.

The invention relates to electrical engineering and can be used in transformers and electrical machines.

Known toroidal magnetic core with windings laminated on the involute cross-section.

Lack of it is a lack of technology and the limited area of use.

In the present invention solves the problem of the elimination of these drawbacks.

This is achieved by the fact that in the toroidal design of laminated plates of the magnetic circuit with electrical windings, in which the blending of the magnetic cross-section made along the involute, winding also made toroidal and laminated on the involute to cross stiny, different functional purpose, for example, conductive, like, insulating, transmitting the mechanical force.

In Fig. 1 presents examples of the use of the invention in the transformers of Fig. 2 and 3 the same, in homopolar machines; Fig. 4 and 5 are the same in the cars AC.

Transformers (Fig. 1) have a body 1, a cover 2, the cooling system 3, electrical leads 4 and 5 (Fig. 1A, 1B). Toroidal design has an internal window that hosts the primary 6 and secondary winding 7 of the transformer (option 1 Fig. 1A). The shell 8 evolvence situada-rolled steel plates. Plates are separate ring or connected to the solenoid. In accordance with the principle of electromagnetic reversibility of the structure during its design in similar structures in toroidal window is the magnetic circuit 9, is wound in the form of a ring of tape electrical steel (option 2 of Fig. 6A). The shell 8 when this evolvence situada the copper plates connected in open-loop (in special cases closed) solenoid, the ends and intermediate the findings of which are internally connected to pins 4 and 5 of the transformer.

According the Informator can be not only electric, but magnetic.

Schematic diagram of such a transformer is shown in Fig. 1B, the design in Fig. 1B.

At the same time, internal toroidal box transformer is u-shaped conductor of electric current 10 and constituting one body with him 5. conclusions The shell 8 has a design option 1 and Fig. 1A with the difference that shihtovochnye plate connected to the solenoid and that part shihtovochnye plates beyond the dimension of the toroidal structure, acting as a core of the primary winding 10A (Fig. 1B).

In Fig. 1G shows the structure of a rotating three-phase transformer with a cylindrical air gap " that separates the toroidal design of the magnetic circuit with the electrical windings into two parts, one of which is fixed in the housing of the electric machine rotation, the other on the shaft. Both parts have involute blending of the magnetic circuit, both parts have a primary electrical winding in the fixed part, secondary to the mobile. The design can be used in the circuit of the exciter contactless synchronous machines with rotating rectifier.

Motors and generators (Fig. 2-5) have a body or body-frame 11, a cover 12, a bearing 13, and the cooling system, which in Fig. 2-5 are not shown.

Toroidal design separated by air gaps (cylindrical, disk or their combination) on the rotor and stator parts with the corresponding fastening (for example, through the spline connection) on the shaft 14 and the housing 11.

In areas of electric current and magnetic flux toroidal design has involute blending of the magnetic core and electrical windings, in areas of alternating directions of the magnetic flux involute blending of the magnetic circuit, the permanent plots of the direction of the magnetic flux of the magnetic core is made of solid metal.

In Fig. 2 examples of design unipolar (once-through) DC machine with radial (involute) (Fig. 2A) and axial (Fig. 2B) directions of the operating current.

The design has two internal toroidal window, where the electric winding of the magnetic flux.

The design feature is involute mixed rotor and proportions radial dimensions.

In Fig. 3A shows an example of unipolar machines single-phase alternating current.

All sections of the magnetic circuit have evolvere D and internal D1additionally laminated conductive layers (sheet copper or copper coated steel plates), which form the winding operating current of the electric machine.

In the inner boxes of the magnetic circuit in its stator part has two electric winding of the magnetic flux.

Operating current is supplied to the rotary part of the magnetic circuit through sliding contacts from an external source (option 1, Fig. 3A) or through field winding and the transformer T, embedded inside the magnetic core of the electric machine (option 2 of Fig. 3A).

In the latter case, the stator part of the magnetic circuit is made up of several sections and each section has its own secondary winding, through which the moving contact is closed on the winding operating current of the rotor.

Both can be used in one electric machine and the different modes of operation, for example, at start-up and rated load.

In Fig. 3b shows an example of an electric machine with a multi-way movement of the operating current, which is used in all major types of modern electrical machines AC / DC.

In the design of power if the ribbon electrical steel. The lines of force of the electric current are radial (involute) direction.

Toroidal design of the magnetic circuit has three components of the same type design, the split disk air gap. The extreme part fixed in the housing and belong to the stator, the middle part is mounted on the shaft and belongs to the stator, the middle part is mounted on the shaft and belongs to the rotor.

All parts of the toroidal designs have an internal switching. As one of the examples in Fig. 4 shows the wave winding composed of conductive layers shihtovochnye plates and C-shaped conductors located in each of the four corner slots of each component of the magnetic circuit with a step for each angular groove in four shihtovochnye plate and the distance between the shelves of a C-shaped conductor in three shihtovochnye plate (4A). Shelves are placed in the Windows Explorer.

In Fig. 4B Dana schematic diagram of the electrical connections when the machine is in operation on three-phase current. The number of plates used in the scheme, a multiple of 12. In Fig. 4B used 24 plates. The direction of current in each phase taken for time t t1where I

When this rotary part of the toroidal structure can be enclosed within the compounds A-X, B-Y, C-Z (squirrel cage rotor) or have the appropriate outputs on the sliding contacts 16 (Fig. 3), as is the case in induction motors with phase rotor.

To work in the synchronous machine in the rotor part toroidal design of the internal switching must be supplemented links X-Y, B-Z, the ends a and C display the contact ring and apply through them DC.

For operation of the electric machine in the mode of a DC motor can be used toroidal design with internal switching electrical windings, as for synchronous machines, but with the additional use of known solutions of controlled semiconductor switches brushless motors.

However, if you use sequential switching of phases a, b and C at a constant current by using a multiphase inverter, the technical capabilities of the electric machine with the proposed toroidal design will nedoispolzovannoe.

In Fig. 4B shows the internal circuit switching is th N 20 (Fig. 4G).

From the diagram according to Fig. 4B should be pretty obvious that if at time t t1external constant current source connected with the C-shaped conductors connecting the conductive layers of the 1-St and 4-th plate (-), and 5-th and 8-th plate (+), 1, 2, 3 and 4, the plate current will have the same direction, and 5, 6, 7, 8 plates opposite. In the next moment, it is possible to modify the schema of the external connections by one of two options:

to an external source (+) to connect the S-shaped conductor connecting conductive layers 2-nd and 5-th plates and 6-th and 1-th plate (-). Will turn the magnetic field on one plate. However, this scheme of alternation external connections requires the use of C-shaped conductors arranged on different diameters;

the second option provides the rotation of the magnetic field with its discrete offset by two shihtovochnye plate, when in the moment of time t2to an external source connected:

to "-" 3-5 plates,

to "+" 7-2 plate

next to the "-" 5-8,

to "+" 1-5 etc.

With each cycle of the switching circuit provides a discrete rotation of the magnetic field by 90 electrical degrees.

This management scheme required the SS="ptx2">

In Fig. 4D to create the rotating magnetic field shows a diagram using 20 shihtovochnye plates with conductive layers.

C-shaped conductors 1-4, 3-6, 5-8 plates of the stator windings through the thyristors 17, 18, 19 are connected to "-" the external network, and 11-14, 13-16, 15-18 through the thyristors 20, 21, 22). At the time of start, time t1and in moments of t4, t7, t10open the thyristors 17 and 18. At time t2and in moments of t5, t8, t11, control signals, for example, from additional microprocessor control unit (Fig. 9g not shown) thyristors 17 and 20 are closed at the same time open the thyristors 18 and 21. Similarly, at time t3and in moments of t6, t9close the thyristors 18 and 21 and simultaneously open the thyristors 19 and 22.

This C-shaped conductors of the rotor winding 2-5 and 12-15 via the contact ring 16 is connected to a constant power source.

The considered control scheme provides a speed determined by the control unit, and can be used as a trigger. After dialing the desired engine speed thyristor control unit with microprocessor from work off and on>/P>In Fig. 5 examples of non-traditional types of electrical machines of the rotation.

In Fig. 5A electric machine according to the scheme of work is different from the traditional frame with an electric current in a magnetic field so that the frame is leaking magnetic flux, and power lines that it crosses represent the lines of force of the electric current. Toroidal design consists of two rotary parts 25 and 26. Part 25 of laminated steel plates and copper strips. Part 26 of laminated steel sheets. The outer sleeve 27 part 25 is a collector containing at least three plates.

In Fig. 5B shows an electric machine three-phase AC. A distinctive feature of the machine consists in placing the phase windings in the three inner boxes toroidal design. In Fig. 5B they performed at the rotary part of the magnetic circuit that is not required. The outer sleeve 28 of the rotary part is made of soft-magnetic material and the outer part are subzone ledges. The step of teeth on each of the outer sleeve 28 is constant and is equal to S. In relation to each other, the teeth of the outer bushing 28 is shifted by the value "1/4 S". While the conductors of the stator h is the gap which replaced the rolling elements 28 of conductive material (for example, bronze). Electric winding of the magnetic flux and electric current are combined in the windings 29. Electric current is also carried on the shaft 31. To the external network of the winding are connected through the conclusions 32 and 33. To enhance the effect of the operation of the electrical machine according to Fig. 5V electrical winding 30 can run multiple, bearing rings made of composite materials with a low ohmic resistance in the radial direction and a large flow resistance around the circumference of the shaft 31 is additionally laminated conductive layers, a number of conclusions 32 and 33 is increased and each other with respect to an external electrical network, they have a serial connection.

1. Toroidal design of laminated plates of the magnetic circuit with electrical windings, in which the blending of the magnetic cross-section made along the involute, characterized in that the winding is also made toroidal and laminated on the involute cross-section of the plates of constant thickness.

2. Design by p. 1, characterized in that it is made of layers of plates, different functional purpose, such as conductive, like, insulated, front


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