Direct current stabilizer for powering the main coil of the iron-current channel at the JINR phasotron

A 12.5 kA/12 V stabilized direct current power supply unit is described. The current range is from 10.0 to 12.5 kA, current instability and pulsation amount to ∼10-3. Current is regulated by means of varying-voltage thyristor regulator with a phase control, connected to the primary side of the rectifier transformer. Pulsation is suppressed by a transistor regulator connected in parallel with the load. The measuring part of the stabilizer is based on a magnetic modulation device for comparison of constant voltages, a standard instrument manganin shunt with the voltage drop rating 75 mV, a reference current source and reference resistor. The block diagram of the stabilizer, circuit diagrams of its individual parts and information on the design of its basic units are given. 9 refs.; 6 figs