Resolver signal processing system

摘要

A resolver use angle detection IC subjected to a phase lock operation so as to follow not an angle ¸(t) for detection, but a phase angle Éot±¸(t) having an offset of a frequency Éot in the phase lock units. For this reason, when the excitation frequency Éot is set sufficiently high with respect to the frequency of the angle ¸(t), the phase angle Éot±¸ 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.