The method of isolation electromagnetic coils

 

(57) Abstract:

Usage: electrical engineering, a device for isolation of electrical products. The inventive coil is placed in the impregnation chamber, the coil leads are placed in the upper part of the chamber and stack with the formation of one or more loops. Pour the coil in the chamber heated dielectric varnish, leaving part of the hinge conclusions free. Use the camera of mechanically destroyed material. Carry out heating, multiple vacuum chamber and feeding an inert gas. After impregnation remove isolated coil from the cell by destroying the camera.

The invention relates to electrical engineering, in particular to a device isolation electrical products.

A known method of manufacturing permanent magnets by pressing the source of the charge in a magnetic field at a pressure of 2-5 t/cm2, the evacuation of the obtained briquettes and subsequent impregnation him in anaerobic material under air pressure of 1-2 ATM and polymerization at room temperature and air pressure of 1-2 ATM [1].

Known method of sealing electrical capacitors by epoxide compound sectt film thickness of 1-5 mm and utverjdayut them to memory state when the temperature in 1.5-2 times higher than the final temperature of polymerization within 3-10 minutes After this film of the epoxy compound to be applied on the sections and presoviet them at 80-140aboutC for 3-5 sec and then produce the curing compound at 60-100about[2].

The disadvantage of this method is the complexity of the method of sealing coils and short period of operation of the latter at high temperatures.

Closest to the proposed method, i.e., the prototype is a method of vacuum impregnation and filling of electrical products. When the impregnation product scriplet in a mixing tank, mixing tank filled with resin and vacuum system, heated, produce mixing of the resin and its degassing at a temperature of 60aboutC. After reaching a vacuum of 10 Torr in the mixing tank pour the hardener and again produce a vacuum with stirring and heating. After reaching the temperature of the product 80aboutC and a vacuum of 10-1Torr, the product is lowered to the bottom of the glass, the capacitance is again vacuum and additionally fill in the compound from the container, creating new pressure of 3-3 .5 ATM [3].

The disadvantage of a small period of operation of the electromagnetic coils at high temperatures.

The aim of the invention is to increase A goal is achieved by the coil is placed in an impregnating chamber, made of mechanically fractured material. The camera fill dielectric varnish at room temperature. Filling varnish cameras produce so that the leads of the coil is partially housed on top of the coil and pour them with varnish. The thickness of the layer of lacquer on top should be not less than the thickness of the varnish between the chamber walls and the coil. The coil leads are placed in the upper part of the chamber and stack with the formation of one or more loops. Fill lacquer produce leaving part of the hinge conclusions free.

Next, the camera is subjected to 3-5 times the vacuum between the vacuum filling system with argon or another inert gas. Then the chamber is maintained at a temperature of 130-150aboutC for 1-3 h the Camera mechanically destroy, and the resulting coil after extracting operate at elevated temperatures.

The major difference of the proposed method against known is the placement of the coil when filling dielectric varnish in mechanically destroying the camera with a diameter somewhat larger diameter of the electromagnetic coil. To remove the coil after hardening lacquer Kama is Secondly, part of the conclusions of the coil is fixed in the layer of varnish in the upper part of the chamber and stack with the formation of one or more loops. As a result, when the operating coil is formed on the contact pins with lacquer cracks will not be able to reach the surface of the coil and to promote the breakdown of insulation.

P R I m e R 1 (by known means). The electromagnetic coil is fixed in a mixing tank. In the mixing tank is poured lacquer PE-933, consisting of a block copolymer based polyol, polyglycerylmethacrylate, PolyLineSegment and epoxy resin ED-20.

The vacuum system, heated, produce mixing of the resin and its degassing at a temperature of 60aboutC. After reaching a vacuum of 10 Torr in the mixing tank pour the hardener - butoxycarbonylamino rezol resin RB and again produce a vacuum with stirring and heating. After reaching the temperature of the product 70aboutC and a vacuum of 10-1Torr product release on the bottom of the glass, the capacitance is again vacuum and additionally fill in the compound from the container, creating new pressure of 3-3 .5 ATM. Then remove from the glass magneto coil.

Cut the parameters: ohmic resistance of the coil under normal conditions and under operating conditions and oscillogram output coil amplitude (not less than 10 mV peak and peak) and the shape of the signal.

Deviation from the norm is considered, if the ohmic resistance increases more than 30% from the nominal value, and the amplitude of the signal falls to below 10 mV peak and peak, and appears ragged waveform. The unit begins to emit a low tone.

The time of the normal operation of the reel is 2000 hours

P R I m m e R 2 (the proposed method). Magneto coil placed in a glass chamber (tube), the diameter of which is 1 mm larger than the diameter of the coil. The camera fill dielectric varnish PE-933 at a temperature of 20aboutC. on Top of the coil is placed out of a coil conclusions in one loop and fill with a layer of varnish 5 mm

Then the camera sealed, connected to a vacuum pump and the device for supplying argon, begin to rise in temperature up to 130aboutC and maintained at this temperature for 3 hours during this period of time the system vacuum up to 0.1 mm RT.article and insulated system is filled with argon alternately 5 times.

After 3 h the camera is cooled to 20aboutWith and break, removing the coil. The coil tested at a temperature of 180aboutC. the estimated time the work is carried out analogously to example 1. Lying to the service magneto coil at a temperature of 180aboutFrom 2000 to 3800 hours

The METHOD of ISOLATION of the ELECTROMAGNETIC COIL, wherein the coil is placed in an impregnating chamber, pour the heated dielectric varnish, carry out heating, multiple vacuum chamber and feeding an inert gas and after impregnation remove isolated coil from the camera, characterized in that, as specified camera use the camera mechanically fractured material, the coil is removed by destroying the camera, and the terminals of the coils are placed in the upper part of the chamber and stack with the formation of one or more loops and fills produce, leaving part of the hinge conclusions free.

 

Same patents:

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly to the method of making high-voltage lead terminals. Channels are made in the electrically conducting element of a lead terminal, providing for access of the impregnating compound to inner layers of electric insulating material, and on the end sections, flanges are attached, which boarder the area where electric insulating material is put. After winding electric insulating material, the lead terminal is thermally processed and put into an elastic sealed sheath, on which nipple passages to its inner cavity are put, uniformly distributed along the sheath. The lead terminal is then put into an impregnating chamber, thereby joining channels in the electrically conducting element and the nipple passages with the vacuum-pressure impregnating system. Further impregnation and insulation are done at high pressure of neutral liquid in the impregnating chamber and the compound inside channels in the electrically conducting element. The neutral liquid is heated and the lead terminal is baked.

EFFECT: increased reliability and service life of lead terminals.

10 cl, 2 dwg

Up!