Angle detection apparatus

摘要

According to one embodiment, in the angle detection apparatus, the first A-D converter unit receives the first signal, and performs analog-to-digital conversion of the first signal. The second A-D converter unit receives the second signal orthogonal to the first signal, and performs analog-to-digital conversion of the second signal. The first delay circuit receives a third signal outputted by the first A-D converter unit, and performs a phase adjustment of the third signal. The second delay circuit receives a fourth signal outputted by the second A-D converter unit, and performs a phase adjustment of the fourth signal. The phase detection adjustment unit monitors phases of signals outputted by the first and second delay circuits, and gives phase adjustment commands to the first and second delay circuits, when a phase shift occurs.

主权项

1. An angle detection apparatus to perform angle detection of a rotary shaft of a rotating device to generate a first signal and a second signal orthogonal to the first signal by amplitude-modulating an excitation signal in accordance with a rotation angle using a resolver, comprising:
a first A-D converter unit to receive the first signal, the first A-D converter unit to perform analog-to-digital conversion of the first signal; a second A-D converter unit to receive the second signal, the second A-D converter unit to perform analog-to-digital conversion of the second signal; a first delay circuit to receive a third signal outputted by the first A-D converter unit, the first delay circuit to perform a phase adjustment of the third signal; a second delay circuit to receive a fourth signal outputted by the second A-D converter unit, the second delay circuit to perform a phase adjustment of the fourth signal; and a phase detection adjustment unit to monitor phases of signals outputted by the first and second delay circuits, the phase detection adjustment unit to give phase adjustment commands to the first and second delay circuits, when a phase shift occurs.