How are the two windings in a resolver rotor oriented relative to each other?

In a resolver rotor, the two windings are positioned 90 degrees apart from one another. This orientation is crucial because it allows the resolver to effectively utilize the principle of sine and cosine to encode angular position. When the rotor is turned, the two windings generate different voltage outputs based on the rotational angle. The 90-degree separation enables the system to discriminate between different rotational positions, providing accurate feedback for precise control applications. This characteristic is fundamental to the resolver's operation, enabling it to output signals that correspond to the sine and cosine of the rotor's angle, which can then be processed to determine the exact position of the rotor.