The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Apr. 21, 1987
Wolfgang Muller, D-7500 Karlsruhe 1, DE;
Klaus Goebel, D-7512 Rheinstetten 3, DE;
Other;
Abstract
A method and a device serve for cooling a magnet system, in particular a magnet system (50) of a nuclear spin tomograph, with high homogeneity of the magnetic field. A coil (51, 52, 53, 54) made from an electrically conductive material having a finite active resistance is connected to a power supply unit (72). A cooling body being in thermally conductive contact with the coil (51, 52, 53, 54) is passed by a cooling agent. In a first operating mode, at rated duty, the coil (51, 52, 53, 54) is supplied with a rated current, and the active throughput of the cooling agent is adjusted to a rated value. In order to keep the energy costs low during inoperative times of the magnet system, while keeping the waiting trimes required when the magnet system is switched on again as low as possible, a second operating mode, defined as stand-by duty, is provided during which the coil (51, 52, 53, 54) is supplied with a rest current and the active throughput of the cooling agent is adjusted to a rest value.