Method and system for controlling magnetic field generating unit

Details Method and system for controlling magnetic field generating unit Method and system for controlling magnetic field generating unit

1987-11-10

1988-12-06

Capossela, Ronald C.

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

62223, 62230, 324318, 335216, 335217, F25B 1900

Patent

active

047888342

ABSTRACT:
To reduce the running cost of an MRI apparatus, power supplied to a normal conductive coil from a pre-regulator is reduced in an idling mode. This reduction in power also reduces the heat generated in the normal conductive coil and a shunt resistor. A computer controls a cooling unit according to the amount of the heat reduced in order to reduce to flow rate of a cooling medium. In this manner, the temperatures of the normal conductive coil and shunt resistor can be maintained at constant levels. Further, if a current value is set to maintain the temperatures of the normal conductive coil and shunt resistor at the constant levels only by natural heat radiating, circulation of the cooling medium can be stopped.

REFERENCES:
patent: 3022641 (1962-02-01), Myck et al.
patent: 3434299 (1969-03-01), Nussbaum
patent: 3803864 (1974-04-01), Cooper
patent: 4590428 (1986-05-01), Muller et al.
patent: 4595899 (1986-06-01), Smith et al.
patent: 4652824 (1987-03-01), Oppelt
patent: 4658593 (1987-04-01), Stenvinkel

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