A REGULATED CONTROL SYSTEM FOR A LARGE ELECTROMAGNET
MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INSULATION RESEARCH
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The system is an automatic self-correcting device which maintains the magnet current at any desired level. The design is a servomechanism which functions as a follow up device for varying input commends. It also compensates for extraneous current fluctuations resulting from variations produced by temperature changes, generator brush noise, generator structural asymmetries, and changes in generator speed caused by variations in line voltage. The design originally incorporated a parallel connected dual-loop design of which the LF loop, or current stabilizer, was intended to satisfy the input requirements, the the 2 loops together would give the proper degree of stailization. The present system however, uses only the LF loop which compensated for the drift and small shifts in the dc value of the current at any desired level. Slow thermal drift and small dc shifts are held to within 1 part in 10 to the 5th power.
- Electricity and Magnetism