Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1993-07-06
1995-02-28
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
32420717, 32420712, 324260, G01R 3302
Patent
active
053942906
ABSTRACT:
An arrangement using sensing coils for obtaining flux rate of change information in a magnetic circuit. The arrangement can be used for vibration attenuation in a magnetic forcer system. Active (electric powered) circuitry is used to implement closed loop control of flux rate. The control loop is "tuned" for attenuating a narrow range of vibration frequencies. The arrangement can be applied to magnetic forcer/suspension systems in which vibrations due to magnetic, mechanical/magnetic runouts, system mechanical resonances, or external vibration sources are present.
REFERENCES:
patent: 4810964 (1989-03-01), Granberg et al.
patent: 5013987 (1991-05-01), Wakui
patent: 5066911 (1991-11-01), Hulsing, II
patent: 5107210 (1992-04-01), Shirao et al.
Hahn Eric
Mathisen Eric C.
Scruggs Michael K.
Ushiyama Randall K.
Allied-Signal Inc.
Gaffin Jeffrey A.
Massung Howard G.
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