Minimum cost solenoid magnet and method of making same

Details Minimum cost solenoid magnet and method of making same Minimum cost solenoid magnet and method of making same

1998-04-21

2000-06-13

Oda, Christine K.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324309, G01V 300

Patent

active

06075365&

ABSTRACT:
A method of designing a minimum total annual cost solenoidal electromagnet. The magnets are designed using dimensionless shape ratios .alpha. and .beta.. A quantity of conductor material required for a solenoidal magnet is expressed in terms of .alpha. and .beta.. A cost of the conductor material and cost of magnet fabrication are dependent upon the quantity of conductor material. The conductor material cost is depreciated over a number of years to provide a cost per year of conductor material. Similarly, the power consumption of the magnet results in an annual power cost which is dependent upon power consumption. The power consumption is expressed in terms of .alpha. and .beta.. The power cost and conductor material cost are summed and the resulting total annual cost expression can be minimized by appropriately selecting values for .alpha. and .beta.. Magnets built according to such values of .alpha. and .beta. will have low total cost (power cost plus material cost). Solenoidal electromagnets according to one embodiment of the present invention have .alpha..beta..ltoreq.4, .alpha..gtoreq.1.1, and .beta..gtoreq.0.22. The present invention also includes a method for reducing the temperature rise rate with a minimal increase in cost of magnets built according to the present invention.

REFERENCES:
patent: 4906931 (1990-03-01), Sepponen
patent: 5057776 (1991-10-01), Macovski
patent: 5629624 (1997-05-01), Carlson et al.

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