Brushless resolver and brushless synchro can be used for high accrete feedback of position and speed sensing, and pole detection of motor.
Through their features of resistance for harsh environment and other reasons, they are used with motors for machine tools and robots, in steelworks.
Angle sensors (Analog output)
A resolver is an angle sensor that outputs rotational angles as two-phase AC voltages (analog signals). It features structurally high environmental resistance compared to other sensors due to its simple design comprised of only an iron core and a coil.