SIGNAL CONVERTER AND CONTROL DEVICE

摘要

A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.

主权项

1. A signal converter comprising:
a resolver excited by a carrier signal having a carrier frequency fc and which outputs at least two phase signals including a first phase signal and a second phase signal; a first phase shifter circuit that shifts a phase of the first phase signal output from the resolver with a pole at a frequency f1 lower than the carrier frequency fc; a second phase shifter circuit that shifts a phase of the second phase signal output from the resolver with a pole at a frequency f2 higher than the carrier frequency fc; and a synthesizer circuit that combines the phase-shifted first phase signal with the phase-shifted second phase signal and outputs a phase-modulated signal where the carrier signal is modulated by a rotation angle of the resolver.