Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2007-11-27
2007-11-27
Aurora, Reena (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
Reexamination Certificate
active
10793220
ABSTRACT:
An angle position detection apparatus according to the present invention includes: a unipolar resolver and a multipolar resolver installed so that reluctance is changed in synchronization with the revolution of a direct motor drive; and a select switch is used to switch between paths along which an excitation signal from a transmitter is supplied to these resolvers. When the supply path for the excitation signal is changed by the select switch, at the least, the unipolar resolver and the multipolar resolver are not excited at the same time, so that magnetic flux leaking from one resolver does not electrically interfere with the other resolver. Therefore, the unipolar resolver and the multipolar resolver30can be arranged so they are near each other, and the size and the thickness of the angle detection apparatus can be reduced.
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Aurora Reena
NSK Ltd.
NSK Precision Co., Ltd.
Sughrue Mion Pllc.
Whittington Kenneth J
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