Method and apparatus for operating a resolver, and resolver device

An apparatus (7) for operating a resolver (1), which has at least one receiver winding (3, 4) and at least one excitation winding (2), which are associated with a rotatably mounted shaft (5), said apparatus comprising:

• a device (9) that determines an angular position of the shaft (5) as a function of an induced voltage generated by the excitation winding (2) by means of a desired excitation signal (SES) with a predetermined frequency and amplitude and detected by the receiver winding (3, 4), wherein the device is configured to increase the desired excitation signal;
• means (10) for limiting an electrical voltage on the excitation winding (2), wherein the means (10) limits the voltage only above a maximum normal voltage in only one current direction;
• and
• an evaluation device associated with the excitation winding, the evaluation device configured to detect the increased desired excitation signal and compare the increased desired excitation signal to an actual excitation signal of the excitation winding in order to recognize correct or incorrect wiring of the resolver.