Motor encoders

Inductive motor encoders are integrated into the DYNASYN DD5-14-10-POW-18600-B5 synchronous servo motors (AMK classification P). They are single-turn absolute encoders with a digital EnDat 2.2 light interface.

 

The main job of the motor encoder is to feed back the position of the rotor to the inverter. With field-based regulation, the current setpoints and current commutations are calculated from the rotor position. The synchronous motor requires an absolute measuring system that is aligned with the poles of the permanent magnets in the rotor. The evaluation electronics use the encoder signals to generate the actual speed value for the drive control.

 

To ensure correct commutation for synchronous motors, the encoder must be adjusted after it has been mounted on the motor shaft.   Contact AMK service!   The commutation offset defined during the encoder adjustment is stored in the encoder if it has an encoder store. If the position of the encoder changes in relation to the motor shaft (e.g., if the encoder is replaced), the commutation offset must be redefined, as otherwise it will not be possible to control the motor. AMK motors with absolute encoders and encoder stores are adjusted at the factory and delivered with a valid commutation offset.