Two-phase motor, particularly a time piece motor or a motor for driving the hand of a display
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 28, 2000
Grant Date -
N/A
app pub date -
Oct 2, 1997
filing date -
Dec 22, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A two-phase motor formed by a stator part excited by electric coils and a magnetized rotor. The rotor has N pairs of poles which are radially magnetized in alternate directions, N being equal to 3 or 5. The stator part has at least two W-shaped circuits comprising each an electric coil surrounding the central leg. The 'W' circuits are so arranged that when one of the central legs faces a magnetic transition, the other central leg faces a magnetic pole. The polar opening outs of the legs of a 'W' circuit are angularly spaced by .pi./4. The polar opening outs of the central legs of the two 'W' circuits belonging to different phases are angularly spaced apart by an angle which is substantially equal to .pi./2.+-.k..pi./N, where N is the number of pairs of magnetic poles, that is 3 or 5, and k is equal to 0, 1 or 2.
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