Electricity: motive power systems – Linear-movement motors
Reexamination Certificate
2005-09-28
2009-11-17
Mullins, Burton (Department: 2834)
Electricity: motive power systems
Linear-movement motors
C310S012060
Reexamination Certificate
active
07619377
ABSTRACT:
A linear motor system that can extend the stroke of a linear motor, with power saving and at a low cost, is provided.In a linear motor system, constituted by a linear motor100, a controller7for supplying a variable voltage, a winding switching device6, for opening and closing phase windings5of individual phases that form a plurality of winding groups4that are separated in a stroke direction, the winding switching device6is constituted by a three-phase rectifying member, a semiconductor switch, which is located at both ends on the direct-current output side of the three-phase rectifying member, and a resistor and a capacitor, connected in parallel to the semiconductor switch. For each of the phase windings, which form the plurality of winding groups4, separated in the stroke direction, one end is connected to the output end of the controller7and the other end is connected to an alternating-current input side of the three-phase rectifying member of the winding switching device6. And by opening or closing the semiconductor switch included in the winding switching device6, of the plurality of winding groups4separated in the stroke direction, only a desired winding group4is excited.
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Maemura Akihiko
Morimoto Shinya
Shikayama Toru
Takaki Mamoru
Tanaka Yoshiyuki
Kabushiki Kaisha Yaskawa Denki
Mullins Burton
Sughrue & Mion, PLLC
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