Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-08-15
2006-08-15
Nguyen, Matthew V. (Department: 2838)
Electrical generator or motor structure
Dynamoelectric
Rotary
Reexamination Certificate
active
07091641
ABSTRACT:
To provide a magnetic bearing device capable of lowering the costs required for the manufacture, installation, or the like of a turbo molecular pump by reducing the number of elements of an amplifier circuit that drives, through excitation, electromagnets as well as the number of wires of a cable that connects the each electromagnet and the amplifier circuit to each other, and a turbo molecular pump with the magnetic bearing device mounted thereto. One end of an electromagnet coil is connected to a common node. Also, the other end thereof is connected to an amplifier circuit composed of one transistor and one diode. Further, the one end of the electromagnet coil is common with respect to each of the electromagnets, and the common node R is controlled by an intermediate-voltage maintaining circuit so as to maintain an intermediate voltage.
REFERENCES:
patent: 3823990 (1974-07-01), Gillinson, Jr.
patent: 5973468 (1999-10-01), Yamauchi
patent: 6005316 (1999-12-01), Harris
patent: 6259179 (2001-07-01), Fukuyama et al.
patent: 6278251 (2001-08-01), Schöb
patent: 6297574 (2001-10-01), Schöb et al.
patent: 6873075 (2005-03-01), Taira et al.
patent: 6949853 (2005-09-01), Kawashima
patent: 0395116 (1990-04-01), None
Kawashima Toshiaki
Yamamoto Masayuki
Adams & Wilks
Boc Edwards Japan Limited
Nguyen Matthew V.
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