Electrical generator or motor structure – Dynamoelectric – Reciprocating
Reexamination Certificate
2011-03-15
2011-03-15
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Reciprocating
C310S012010, C310S014000, C310S039000, C310S071000, C310S089000, C310S101000, C310S144000
Reexamination Certificate
active
07906877
ABSTRACT:
The present invention provides a linear motor device that can reduce a variation in thrust caused by a variation in attractive force. The linear motor device includes a linear motor1and a control section30that controls the linear motor1. The linear motor1includes a magnet member2composed of permanent magnets having respective N poles and S poles alternately arranged in an axial direction, and a coil member3which is located orthogonally to the axial direction with respect to the magnet member2and through which the magnet member2is movable in the axial direction relative to the coil member3. The control section30controls current conducted through the coil member3so that a moving one of the magnet member2and the coil member3reciprocates within a use range L corresponding to a part of a pitch p between the magnetic poles N and S in the magnet member2.
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AN899a.pdf : Microchip.com, motor control application note (2004).
Ishiyama Noritaka
Okada Takuya
GMC Hillstone Co., Ltd.
Kim John K
Leung Quyen
Murata Machinery Ltd.
Westerman Hattori Daniels & Adrian LLP
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