Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1993-03-22
1994-06-21
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
324318, 324319, G01R 3338, H01F 720, H01F 4104
Patent
active
053231350
ABSTRACT:
In a method for the production of a magnet coil arrangement which can create a predetermined magnet field B and has a minimal inductance L. The magnetic field B to be generated is expanded in spherical harmonics with coefficients C.sub.n,m and a field error .DELTA. B=f.sub.1 (C.sub.n,m) is defined fixing the deviation of the magnet field profile of the coil arrangement to be calculated from the given magnet field B within a volume and, if necessary, further parameters P=f.sub.2 (C.sub.n,m) are predefined, whereby the value of P which is calculated with a particular set of coefficients C.sub.n,m is within predetermined limits. By defining limits for technically relevant parameters and their variation as well as by giving the desired minimum inductance, the procedure achieves a high flexibility in conjunction with independent optimization of the parameters, in particular field errors, minimum inductance and current density oscillations.
REFERENCES:
patent: 4617516 (1986-10-01), Schenck
patent: 4652826 (1987-03-01), Yamamoto et al.
patent: 4724412 (1988-02-01), Kalafala
patent: 4896129 (1990-01-01), Turner et al.
patent: 5266913 (1993-11-01), Chapman
Schmidt Hartmut
Westphal Michael
Barrera Raymond
Bruker Analytische Messtechnik GmbH
Donovan Lincoln
Hackler Walter A.
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