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DREHWINKELSENSOR

Patentnummer:EP3816587B1
IPC Hauptklasse:G01D5/20
Anmelder:AISIN CORP (1)
AISIN SEIKI (1)
Erfinder:ANDO SHINSUKE (1)
Anmeldung:29.10.20
Patenterteilung:14.09.22
Einspruch bis:14.06.23

Abstract / Hauptanspruch
A rotational angle sensor includes a rotary plate and a printed circuit board in which a primary coil and a secondary coil group are arranged. Loops of the primary coil and the secondary coil group are along a surface of the printed circuit board. The rotary plate includes a target portion whose outer circumferential edge portion has a sine-wave shape. The primary coil overlaps with the target portion, and has a circular-arc shape along a rotational direction of the rotary plate. The secondary coil group includes 4n (n is a natural number) secondary coils arranged in a line along the rotational direction, on an inner circumferential side of the primary coil. The number of turns of a secondary coil on an end side in a line is smaller than that of a secondary coil on an inner side in the line.


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