Semiconductor device, motor control system, and error detection method
AssigneeRenesas Electronics Corporation
InventorsYutaka OSHIMA, Hisaaki WATANABE
Life of this patent
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Abstract
According to semiconductor device includes a domain converter for converting a digitized resolver signal from a time-domain to a frequency-domain, a spectrum analyzer for analyzing a spectrum of the resolver signal converted to a frequency-domain by the domain converter, and an error detector for detecting an error related to the resolver signal based on an output signal from the spectrum analyzer.
Claims20
A semiconductor device comprising:
- an analog/digital converter that digitizes the resolver signal, which is an analog signal;
- a domain converter for converting the resolver signal digitized by the analog/digital converter from the time domain to the frequency domain;
- a spectrum analyzer for analyzing a spectrum of the resolver signal transformed into the frequency domain by the domain transforming unit;
- and
- an error detector for detecting an error related to the resolver signal based on an output signal from the spectrum analyzer.
A motor control system comprising:
- a motor;
- a resolver for detecting the rotation angle of the motor;
- a semiconductor device for generating a control signal based on a resolver signal outputted from the resolver;
- and
- a driving circuit for driving the motor based on the control signal,
- wherein the semiconductor device comprises:
- an analog/digital converter for digitizing the resolver signal, which is an analog signal;
- a domain converter for converting the resolver signal digitized by the analog/digital converter from a time domain to a frequency domain;
- a spectrum analyzer for analyzing a spectrum of the resolver signal converted to a frequency domain by the domain converter;
- and
- an error detector for detecting an error related to the resolver signal based on an output signal from the spectrum analyzer.
An error detection method for digitizing a resolver signal that is an analog signal, converting the digitized resolver signal from the time domain to the frequency domain, analyzing a spectrum of the frequency domain converted resolver signal, and detecting an error related to the resolver signal based on a result of the spectrum analysis.
Dependencies are inferred from the claim text.