What structural design aspect characterizes the rotor in a resolver?

The structural design aspect that characterizes the rotor in a resolver is its cylindrical form, which is divided into two quadrature phases. This design is crucial because it enables the resolver to provide accurate angular position and motion information by measuring the sine and cosine components of the input signal.

In a resolver, the two quadrature phases are set at right angles to each other, allowing the output to represent the position of the rotor in relation to the stator. This setup facilitates the generation of a unique output signal at any given rotor position, which is fundamental for applications such as servo systems and other precision motion control systems.

The cylindrical shape further contributes to the uniformity of the magnetic field and helps in minimizing any potential mechanical imbalance, thereby enhancing the operational reliability of the resolver. This specific design feature is what allows resolvers to be highly effective in applications requiring precise angular measurements.