Reference signal generation circuit, angle converter, and...

Details Reference signal generation circuit, angle converter, and... Reference signal generation circuit, angle converter, and...

2011-08-23

2011-08-23

Koval, Melissa (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C341S112000, C341S116000

Reexamination Certificate

active

08004276

ABSTRACT:
A reference signal generation circuit generates a reference signal used in synchronous detection for removing an excitation signal component in an angle calculation section that converts a detection angle θ obtained from two-phase resolver detection signals output from a resolver, to a digital output angle φ. The reference signal generation circuit includes a first multiplier, a second multiplier, and an adder. The first multiplier multiplies one of the resolver detection signals sin θ sin(ωt+Δω) by the sine value sin φ of the digital output angle φ obtained from the angle calculation section. The second multiplier multiplies the other resolver detection signal cos θ sin(ωt+Δω) by the cosine value cos φ of the digital output angle φ obtained from the angle calculation section. The adder adds the output of the first multiplier and the output of the second multiplier to output the sum signal sin(ωt+Δω) as the reference signal.

REFERENCES:
patent: 2007/0029955 (2007-02-01), Kanekawa et al.
patent: 2000-353957 (2000-12-01), None

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