Angle computation method and apparatus for variable...

Details Angle computation method and apparatus for variable... Angle computation method and apparatus for variable...

2007-03-06

2007-03-06

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

C341S117000

Reexamination Certificate

active

10866804

ABSTRACT:
In an angle computation method and apparatus for a variable reluctance resolver, the maximum values Vsin(max) and Vcos(max) of sine and cosine output voltages in respective positive value ranges and the minimum values Vsin(min) and Vcos(min) of the sine and cosine output voltages in respective negative value ranges are extracted, and on the basis of these values, offset values, amplitude values, sin-cos voltage ratio, and a zero-point correction value are obtained in accordance with the following equations:in-line-formulae description="In-line Formulae" end="lead"?VSINOFFSET=(Vsin(max)+Vsin(min))/2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?VSINAMP=(Vsin(max)−Vsin(min))/2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?θSINPHASE=sin−1(VSINOFFSET/VSINAMP)≅VSINOFFSET/VSINAMPin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?VCOSOFFSET=(Vcos(max)+Vcos(min))/2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?VCOSAMP=(Vcos(max)−Vcos(min))/2in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?K=VSINAMP/VCOSAMPin-line-formulae description="In-line Formulae" end="tail"?On the basis of the thus-obtained values, an angle θ is obtained in accordance with the following equation:in-line-formulae description="In-line Formulae" end="lead"?F(Vsin−VSINOFFSET, K(Vcos−VCOSOFFSET), θSINPHASE)=θ.in-line-formulae description="In-line Formulae" end="tail"?

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patent: 6885927 (2005-04-01), Arimura
patent: 2003/0200018 (2003-10-01), Arimura
patent: 2005/0061087 (2005-03-01), Kichise et al.
patent: 11-51692 (1999-02-01), None

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