The new solution is particularly suited for applications calling for a high level of accuracy, such as servo pumps requiring precise operation right from standstill under high load. As the adjustment range is generally reduced to 1:10 with sensorless control, a sensor would normally be required in such cases. The new functionality is technically implemented using special test pulses which are fed into the motor at low speeds, allowing the motor position to be determined even without inducing a voltage capable of being evaluated at the motor terminals.
For further information on the subject of Simotics synchronous reluctance motors, please see www.siemens.com/drivesystem-reluctance
For further information on Siemens at the SPS IPC Drives 2017, please see www.siemens.com/sps-ipc-drives