| 摘要 |
A rotational angle detection device has a resolver in which an excitation coil, a first output coil and a second output coil are provided on a periphery of a rotor coupled to a rotation shaft, an excitation signal generator circuit that generates an excitation signal and sends the excitation signal to the excitation coil, and a rotational angle calculation unit that performs sampling for respective output signals of the first output coil and the second output coil in a predetermined cycle, and calculates a rotational angle of the rotation shaft based on two sampling signals obtained as a result of the sampling. The excitation signal generator circuit is of a single excitation mode and generates a single excitation signal. |
