High resolution hall effect sensor devices for measuring...

Details High resolution hall effect sensor devices for measuring... High resolution hall effect sensor devices for measuring...

2005-06-01

2008-08-19

Patidar, Jay M (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250

Reexamination Certificate

active

07414392

ABSTRACT:
A device for measuring operating parameters of an electric motor includes a non-ferromagnetic disk which is solidly connected to a rotor of the electric motor and is provided with a plurality of peripheral sockets. A plurality of magnets are associated with the sockets. A pair of Hall effect sensors face the non-ferromagnetic disk on the surface of which the sockets are set. An acquisition and processing system of the signals produced by the Hall effect sensors comprises a resolver to digital converter module adapted to multiply said signals by the cosine and the sine of an arbitrary angle, to subtract the results one from the other and to process the resulting signal through a negative feedback system. The Hall effect sensors are placed so their resulting output signals are in electrical quadrature between each other.

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