Magnetic circuits

Use High-temperature coatings, laminates and composites for aerospace vehicles, ablative materials, oil sealants and retainers, adhesives, semiconductors, valve seats, bearings, insulation for cables, printed circuits, magnetic tapes (high- and low-tem-perature-resistant), flame-resistant fibers, binders in abrasive wheels. 

The offered method has allowed essentially to simplify the X-ray apparatus main circuit, to reduce weight and dimensions of the apparatus, to increase sensitivity and reliability of the inspection and to ensure the apparatus control by a computer The main principle is based on the operation of the transformer controlled by magnetic commutation (TCMC). 

In essence the TCMC method consists in the main transformer magnetic flow redistribution between magnetic circuits of the middle one, which composed by uncontrollable lateral yoke and a number of rods leaned on controllable middle yoke and lateral one, composed by the same uncontrollable yoke and rods leaned on lateral yoke. 

The X-ray apparatus main circuit scheme is shown in Figure 1. The scheme operation is the following before the power winding 1 connection to a supply main in a lateral magnetic circuit composed by uncontrollable yoke 2, controllable yoke 3 and rods 4, the controllable yoke... 

The magnetic regulators allow to synthesize in one module of the X-ray apparatus main cir-euit commutator, form converter, noncontact smooth ac voltage amplitude regulator, para-metrie stabilizer, ac supply filter, fimetional protection against the short-circuit in the X-ray tube and protection against emergencies in the control circuits. 

Pressing and sintering together determine the size and shape of the final product, but these are not well controlled with respect to the critical parts which determine the airgap in the magnetic circuit. For that reason a finishing touch by machining is necessary. 

Ni alloys of 30—32 wt % are used as temperature-compensator alloys and are characterized by a steep decrease ia magnetic permeabiUty with temperature. These alloys are ideally suited ia electrical circuits as shunts which maintain constant magnetic strength ia devices such as electric meters, voltage regulators, and speedometers. 

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