SU498656A1 - Method for determining contact gap in double-wound polarized electromagnetic relays - Google Patents

Description

A device implementing algorithms was used to measure the total and reduced total magnetic fluxes.

S8

 i (t3),

I. F

Max

- fuidf-iu.dt,

max UO

e F Snp is the total magnetic flux reduced to the first pole of the electromagnet;

(-3) is the current in the primary winding at the time of contact closure; W is the number of turns of the first winding; .to - magnetic permeability of air;

56 - the area of the electromagnet pole;

6, ,, i; c is the maximum distance between the pole and the pole of the electromagnet;

b j ,,, H is the minimum distance between the pole and the pole of the electromagnet;

f / i, f / 2 are the voltage drops on the inductive components of the total voltage drops of the first and second windings, respectively; / 2 - time contact closure.

(ze

P. f - i,

oo

de F S - total magnetic flux.

Calculate the distance between the contacts by the formula

 .

o - f ;; - o.v, 2Kc

Claims (1)

Invention Formula The method of determining the contact gap in double-winding polarized electromagnetic relays by measuring current characteristics, characterized in that, in order to improve the measurement accuracy without opening the case, measure the total magnetic flux and the total magnetic flux reduced to the working winding of the electromagnet at the moment of closing relay contacts, and then determine the contact gap by the formula . “. ;etc o - f "ax, e b the desired distance between the contacts of a winding relay; total magnetic flux, prif Snp led to the working winding of the electromagnet; total magnetic flux; QS maximum distance between  g and ICC korem and the pole of an electromagnet; ; distance from the axis of rotation to the pr r of the electromagnet to the center of contact; the distance from the axis of rotation of the coh - p electromagnet, about the center of the pole