SU739690A1 - Coil for electric machine - Google Patents

Description

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The invention relates to the field of electrical engineering, in particular to coils for electric machines with backward-acting, flax core and apparatus movements.

Known coil electric cars; containing an insulating gasket made with triangular protrusions evenly spaced on the surface 1. The channels for the passage of the refrigerant are formed between the gasket and the winding layer.

Such a structure is characterized by a reduced cross-section of the channels, insufficient heat removal from the surface of the winding layers due to the continuous surface of the gasket,

Also known is a coil of an electric machine containing a winding, the coils of which are arranged by coaxial layers, and insulating gaskets placed between the layers to form channels for the passage of refrigerant 2.

When the winding wire passes from one layer to another, the ends of thin insulating spacers of the bend are prevented, as a result of which the transition coils block the cooling channels at the ends of the coil. The installation of more than 6 tons: the dying of gaskets reduces the filling ratio of the coil with conductor material and, consequently, reduces the efficiency of the motor and its specific power. In addition, with this implementation of the pads, it is necessary to use a frame (without which the extreme turns

10 fall out of the coil with perforated brushes for the passage of coolant, which complicates the design of the coil.

The purpose of the invention is improvement.

15 performance characteristics by increasing the power density of the cat-ears, to the value of filling it with conductive material and simplifying the design,

20. This is achieved in that each gasket has a C-shaped longitudinal section with a shelf length equal to the thickness of the winding layer and with a height different at opposite ends.

25 by the magnitude of the step of a turn, with the strip winding being placed between adjacent layers with alternating shelves.

FIG. 1 shows a coil

30 longitudinal section; in fig. 2 - TQ

the view from the end; in fig. 3 - the first two layers of winding with spacers in between; in isometry; Fig, 4 gasket.

The coils 1 of the winding 1 of the aircraft are located with the TSbaxial layers 2, which require insulating gaskets 3 to form channels 4 for the passage of the refrigerant.

The gaskets 3 have a shaped longitudinal section with a length t of flow 5 and b equal to the thickness of winding layer 2 and with a height different at opposite ends by a coil pitch, moreover, between the adjacent layers of the gasket are placed alternating opposite shelves 5 and b.

The distance between the inner edges of the shelves 5 and 6 is chosen so that it is practically possible to lay an integer number of turns, but less than the total height of the coil winding by the step size of the coil. The surfaces a and b of the shelves 5 and 6 and the outer surface of the layer of the winding laid on the gasket between the shelves are at the same level.

When the coil is wound, adjacent gaskets of each cooling channel are displaced relative to each other in a spiral in the direction of winding by an amount K -,

where b - step coil; ti is the number of gaskets in one channel.

Thus, the first and last strips of one channel are displaced relative to each other along the longitudinal axis by the step size of the coil.

When the last turn of the lower layer of the winding passes from the last strip to the first layer for the subsequent layer, the winding wire rests on the shelf of the first strip of the lower layer. With further winding, the first turn of each subsequent layer will partially rest on the shelves 5 and b of the gaskets 3 and partly on the pos. the ice coil of the lower layer, And since the surfaces a and b of the shelves 5 and b and the outer surface of the bp laid on the gasket between these shelves are at the same level, the cooling channels are protected from overlapping. For this, the distance Gaskets choose less than the height of the coil winding on the value - step.

The shelves 5 and 6 of the gaskets not only prevent the cooling channels from closing off the outer turns, but also keep the extreme turns from falling out of the coil and, moreover, can serve as end supports between the winding and the electromagnet poles, perceiving power and vibration loads . The design of the coil allows the use of gaskets of any thickness, including very thin ones, which provides an increase in the filling ratio of the coil with conductor material by 25-30% and, consequently, an increase in power density and operation. characteristics.

For ease of use, the gasket reel can also be made frameless.

Claims (1)

1. US Patent No. 3,500,272, Cl, H 01F 5/00, 1971, 2, USSR Author's Certificate, 474077, class, H 02 K 3/24, 1976.