| 摘要 |
This rotation detector (10) comprises the following: a rotor and stators comprising a rotor substrate (12) and stator substrates (11u, 11d), each of which is a multilayer substrate; a rotor coil (22) provided on the rotor substrate (12); and detection coils (21a, 21b) provided on the stator substrates (11u, 11d). The frequency of an excitation signal used by said rotation detector (10) is set so as to be higher than a prescribed frequency that would be required if the rotor and the stators were each made of a magnetic material. |
