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AssigneesSony Corporation, Tamagawa Seiki Kabushiki Kaisha
InventorsMasayuki Katakura, Asako Toda, Yuichi Takagi, Hiroshi Kushihara
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A resolver use angle detection IC subjected to a phase lock operation so as to follow not an angle θ(t) for detection, but a phase angle ωot±θ(t) having an offset of a frequency ωot in the phase lock units. For this reason, when the excitation frequency ωot is set sufficiently high with respect to the frequency of the angle θ(t), the phase angle ωot±θ to be followed in the phase lock units will not become zero. For this reason, an angle having a high precision can be found in real time regardless of the configuration not including the conventional apparatus in which the configuration is complex and the power consumption is large like a bipolar VCO and an up/down type counter.
An angle detection signal processing apparatus for acquiring information of a first angle based on a detection output of a resolver including a first angle detection signal containing an amplitude of a first excitation signal having a first frequency modulated by a signal of a cosine function having a first angle and a second angle detection signal comprised of an amplitude of a second excitation signal having the first frequency modulated by a signal of a sine function having the first angle, said apparatus comprising:
An angle detection signal processing apparatus for acquiring information of a first angle based on a detection output of a resolver including a first angle detection signal comprised of an amplitude of a first excitation signal having a first frequency modulated by a signal of a cosine function having the first angle and a second angle detection signal comprised of an amplitude of a second excitation signal having the first frequency modulated by a signal of a sine function having the first angle, said apparatus comprising
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