SU727043A1 - Commutator with sequent triggering of contact pairs - Google Patents

Description

(54) KONLMVTATOP WITH SEQUENTIAL OPERATION OF CONTACT PAIRS

ling out the time lag of triggering contact pairs and reducing the level of interference.

This is achieved by the fact that the proposed switch is equipped with a bias winding and sealed caps, the screen is made of superconducting material, the casing is also made of superconducting material, sealed with the indicated caps.

The movable contacts are made in the form of case covers, and the stationary contacts are made of superconducting material and are mounted in sealed caps covering the case thoriums.

The drawing schematically shows the proposed switch.

 The excitation winding 1 is rigidly fixed: the en is inside a sealed galvanically closed case 2, the wings of which are moving contacts 3 and 4, fixed contacts 5 and 6 are mounted in sealed covers 7 and 8 / enclosing with TtopuoB building 2, inside which the screen is also fixed 9 and a bias winding 10. Elements 2-6 and 9 of the device are made of superconducting material.

 The device works as follows.

When the magnetic field created by the excitation winding reaches a certain value, it interacts with the magnetic field created by the eddy currents of the unscreened cover, the function of which is performed by the moving contact 3, causes the displacement of the latter (pushing it away from the excitation winding} and closing with the fixed contact 5. A further increase in the magnetic field of the excitation winding creates with the magnetic field of the bias winding 10 such a total field that exceeds the value of the critical field of the superconducting mother screen 9. This total field penetrates screen 9 and, acting on the cover, the functions of which are performed by moving contact 4, ensures the closure of this moving contact with a fixed contact B. The time delay of the closing of a shielded pair of contacts is determined by the growth rate of the magnetic field. excitation winding 1 and can be smoothly controlled by changing the amount of direct current passing through the bias winding to return the device to its original

the position it is necessary to de-energize (reduce the current to a certain value) the field winding.

Expansion of the switching capabilities of the proposed device is provided by adjusting the time delay of the operation of the contact pairs by smoothly varying the amount of direct current passing through the bias winding. This property allows the object to be used for switching circuits in various devices, including as part of an adjustable time delay. The reduction in noise level in switched circuits is ensured by the manufacture of case 2, moving contacts 3 and 4, and contact pairs of superconducting material, which makes it possible to use the effect of Meissner shielding of the excitation and bias windings, as well as reduce the contact resistance of the contact pairs, and consequently, reduce the power resistive noise by several orders of magnitude compared to conventional contacts.

Claims (3)

1. USSR author's certificate number 260742, cl. H 01 H 36/00, 1969. 2. USSR author's certificate number 356709, cl. H 01 H 43/00, 1971. 3. The patent of Belgium No. 755402, cl. H 01 H, 1975.