SU544088A2 - Synchronous electric machine - Google Patents

Description

one

The invention relates to electric machines, namely, synchronous contactless drivers.

Known synchronous electric ma, tires l on auth.St. 433613. However, this design has low efficiency.

The purpose of the invention is to increase the efficiency. Synchronous electric machine.

For this, the width of the pole tip. The inductor is determined from the ratio

) -e

where is the highest spatial

harmonics ns winding core,

t ;, is the pole division of the inductor;

6 1 - when V is an odd number;

e 2 - when V is an even number.

FIG. 1 is a partial cross-sectional view of a synchronous electric machine; in fig. 2 - part of a longitudinal section of a synchronous electric machine.

The machine contains a rotor 1 with a crust winding 2, completed with the number of poles 2p) "s coils with shortened pitch, even2

but distributed on the screen of the insulator 1; On the body of the electrodiode, the poles of the inductor are mounted on the crankshaft of the center-of-wind; the winding is air-induced. 5. In 6 poles of terminals 7, a depo is laid. excitation 3 through the control; rectify: (not shown in the drawing). The number of dad poles is supplemental. windings 8 different V, where) died the highest spatial harmonics of the magnetizing force of the core, which you need to add with the help of additional windings; -. 8. The width of the pole tip 7 is equal to an even number of pole divisions of the higher harmonic.

Electric machine works as follows.

When a direct current flows through the winding 5, a flow FB is created with the number of pole pairs P. When the rotor rotates, an emf is induced in the winding 2. Under the action of this emf, an alternating current flows through the winding 2. Winding 2 is designed in such a way that it creates two main

floor; the first field with the number of pairs of poles P and the second field with the number of pairs of poles P, which moves relative to the inductor and induces an emf in the winding 5, under the action of which the current flows in the winding 5. When the width of the pole tip 7 then the flow of the harmonic closes along the shortest path between the core and the inductor. If the width of the pole tip is chosen to be larger or smaller than this, then a parasitic flow appears, which causes additional losses in the pole, the frame, the adjacent pole and the cortex of the exciter, reducing the efficiency. machines, variable emf in the winding 5, which interferes with the normal operation of the controlled rectifier; additional losses cause heating of the machine.

Thus, the choice of the width of the pole tip of the inductor in a certain ratio to the pole division and the number of the highest spatial harmonics of the magnetizing force of the core winding, allows the entire flow created by the highest harmonic

the magnetizing force of the core, close the shortest path, which reduces losses and increases the efficiency cars.

Claims (1)

1. Copyright certificate № 433613, CL. H 02 R 9/14, 1974. .one