Angle detection apparatus

An angle detection apparatus comprising:

• a resolver that is provided with a first system excitation winding, first system two output windings, a second system excitation winding, and second system two output windings, in which magnetic interference occurs between a first system and a second system;
• a first system exciter that applies AC voltage of a first cycle to the first system excitation winding;
• a second system exciter that applies AC voltage of a second cycle longer than the first cycle, to the second system excitation winding;
• a first system output signal detector that detects periodically output signals of the first system two output windings at preliminarily set detection timing;
• a first system removal processor that performs a second cycle component removal processing which removes component of the second cycle, to detection values of the output signals of the first system two output windings;
• and
• a first system angle calculator that calculates a first angle of the resolver, based on the detection values of the output signals of the first system two output windings after the second cycle component removal processing.