Basic form:
Within the component, a rotor winding and two stator windings are positioned opposite each other. The stators are arranged at a 90°-angle to each other. Based on the current flow induced between the rotor and stators with an applied alternating voltage, the resolver can generate a signal that represents the angular position in a specific moment. This information can be converted and forwarded to connected measuring instruments – particularly a servo-controller – which enables the control of the angular position and the speed of the motor.
Variants:
As the basic principle is based on the ratio of the rotor to two reference points arranged at right-angles, it can also be modified. For example, two rotor windings can be used in conjunction with one stator reference point, as well as four-pole angular position encoder.
Particularly in conjunction with the servo-controller, the resolver is of significant importance for the electric motor. It generates the signal with which the precise control of rotor positions is made at all possible. In simplified terms, it can therefore be stated that the resolver generates the data basis, on which the position of the servomotor can be determined. This works because the resolver is connected to the rotational axis, i.e. the shaft of the motor. The rotor turns similar to the rotation of the motor, while the stators are fixed in the surrounding housing and provide a fixed reference variable.
