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