SU1361678A1 - A.c.electric motor stator - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is the development of energy indicators. The dumping winding is located in the slots of the package of plates of the magnetic circuit. In parallel with the winding, magnetodielectric wedges 8c are placed in the grooves with the housing 9 made of reinforced magnetic dielectric. Inside the case there is a plate 11 made of ferroelectric and flat plates of a capacitor 13, the opposite ends 14 and 15 of which lie in the zone of the frontal parts of the stator winding. The same ends of the plates are interconnected in parallel by means of current collectors of corrugated tape connected to the winding. This leads to a decrease in the phase shift between voltage and current, an increase in power factor and efficiency of the electric motor. 5 il. sl 00 35 -sj 00

Description

The invention relates to electrical engineering and can be used in the manufacture of asynchronous electric machines of low and medium power with a loose winding and reduced noise and vibration.

The purpose of the invention is to increase energy performance.

Fig. 1 shows an encapsulated stator with a composite magnetic wedge, which also has a capacitor effect, with a longitudinal section; figure 2 - magnetic wedge-capacitor in assembled form; on fig.Z - section aa on fig, 1; neither fig, And - section bb on fig.1; on fig.Z - the stator, a transverse section along the tooth zone.

A package of plates of the magnetic circuit 2, which has alternating teeth 3 and 4 with the antennae and without antennae, respectively, is pressed into the finned body 1. Between teeth 3 and 4 are grooves 5, in which winding 6 of round wires is placed. The antennae of the teeth 3 are arranged symmetrically with respect to the middle of the teeth and asymmetrically with respect to the middle of the grooves 5. In the grooves 5 parallel to the winding 6 there are magneto-dielectric wedges 8 (figure 2), the body 9 of which is made of the reinforced magnetodielectric, the projections 10 are located inside the groove 5 between the walls of the teeth 3 and 4 and are pressed with a wedge 8 by sections of the outer winding 6.

With this design of the stator, the dentate zone is rigidly fastened, and winding 6 is pre-pressed. The presence in the body of the wedge 8 of the protrusion 10 reduces the pulsating losses in the air gap, which also has a favorable effect on the decrease in temperature and increase. Efficiency

Inside the housing 9 of the composite wedge 8 is a plate 11, filled from a ferroelectric with grooves

On the side surfaces where the gQ indicators are placed, each wedge is made of flat plates 12 and 13 of the capacitor, opposite ends 14 and 15 of which are located in the zone of the frontal parts of the stator winding 6 near the electrically insulated gaskets 16 and 1 7 of the magnetic core 2. The same KOHnjji 14 and 15 capacitor plates are interconnected in parallel with POM01ZI current collectors 18

a composite of a box-shaped body, inside of which there is a plate made of a ferroelectric with openings on the side surfaces, in gg of which there are flat plates of a capacitor, the opposite ends of which go from the opposite ends of the magnetic circuit to the frontal zone of the winding parts, while the ends of one

and 19 of corrugated tape. The current collectors 18 and 19 are connected to winding 6 (not shown).

Winding 6, opposite ends 14 and 15 of the capacitor, as well as current collectors 18 and 19 are fastened to the monolith by a sealed dielectric capsule 20 made of hardened polymeric material, for example, from a mixture of epoxy resin ED-22 (100 parts by weight), hardening hexamethylenediamine (10 parts by weight) and a filler of quartz powder or marshalite (150 parts by weight).

When an electric motor is operating in a air-filled, stuffy gap between the rotor and the stator, magnetic flux pulsations arise due to the gear structure of the magnetic conductors. The combination of magnetoactive teeth 3 and protrusions 10 on the wedge body reduces pulsation losses, which affects the temperature decrease and efficiency increase. The inclusion of capacitor plates 12 and 13 in the winding circuit during engine operation reduces the phase shift between voltage and current in the circuit, containing an induction motor winding 6 and a wedge 8. The presence of a well-polarized ferroelectric plate 11 enhances this effect, which leads to an increase in power factor and, as a consequence, to a decrease in the operating current in the windings, a decrease in ter and temperature, as well as to increase the efficiency of the motor.

Claims (1)

Invention Formula The stator of an alternating current electric motor, comprising a housing, a magnetic conductor with a toothed area and a full winding fixed in the slots by means of radially directed wedges of a magnetodielectric material, and the frontal winding parts are fastened with a hardened polymeric material, which is energetically indicators, each wedge is completed a composite box-frame housing inside which there is a ferroelectric plate with grooves on the side surfaces in which the capacitor plates are placed, the opposite ends of which go from the opposite ends of the magnetic circuit to the area of the winding frontal parts, one end 31361678 nominal plates of capacitors of an electrically conductive tape and chickpeas with each other through corrugated with winding. e 15. U ///// // 7 ///// wired wire connected to the winding. 17 nineteen 20 5 Compiled by A. Kuzmin. Editor P. Gereshi Tbhred M. Khodanych Corrector. But ha Order 6301/55 Circulation 659Subscription VNIIPI USSR State Committee on affairs of inventions and discoveries 113035, Moscow, Zh-35, Raushsk yab., d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4