Position-Sensorless Control and End-Position Monitoring of a Two-Point Switching Actuator

Description

This presentation addresses a non-model-based position-sensorless control approach for a single-coil rotating linear two-point switching actuator without permanent magnets. A shift current controller was combined with a position-sensorless signal-injection method, which enables reliable shift operations and continuous rest-position monitoring. A sinusoidal test signal is therefore superimposed on the voltage output of the shift current controller and the current response of the voltage test signal is obtained using a Gortzel-filter to evaluate the sensorless mover position. The position lookup-table(s) required for this can be configured automatically with initial measurements at the end positions of the switching actuator. The outstanding advantage of the proposed data-based control approach is that no system parameters need to be known a priori. The variable coil resistance can be identified with a dc current measurement. Moreover, a simple temperature and resistance change compensation method using the complex ac calculus is presented and verified in simulation. The performance of self-sensing end-position detection and monitoring was successfully evaluated on a dynamic test bench.

Period	20 Jun 2024
Event title	2024 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
Event type	Conference
Location	Napoli, ItalyShow on map
Degree of Recognition	International