Speed measurement for an electrical permanent-magnet...

Details Speed measurement for an electrical permanent-magnet... Speed measurement for an electrical permanent-magnet...

2005-09-19

2010-06-29

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

C324S207200, C324S207150, C324S161000

Reexamination Certificate

active

07746064

ABSTRACT:
The invention relates to a speed measurement device (1, 2) for a permanently excited electric synchronous machine (5, 7) comprising a first part (11, 13) and a second part (15, 17). The invention also relates to a corresponding method for measuring speed. The second part (15, 17) of the permanently excited electric synchronous machine comprises permanent magnets (19). The speed measurement device (1, 2) comprises at least one first sensor (25) and a second sensor (31), wherein the first sensor (25) is provided with a sensor coil and the second sensor (31) is a Hall sensor and the sensors (25, 31) on the first part (11, 13) are arranged in such a way that the first sensor (25) and second sensor (31) are influenced by a magnetic field (33), which is generated by the permanent magnets (19), by means of a flow conducting device (43) having an integrated character.

REFERENCES:
patent: 4581553 (1986-04-01), Moczala
patent: 4710683 (1987-12-01), Bahn et al.
patent: 5091665 (1992-02-01), Kelly
patent: 690 21 156 (1995-12-01), None
patent: 101 35 540 (2003-02-01), None
patent: 2 273 166 (1994-06-01), None
patent: 03155362 (1991-07-01), None

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