Title :
An Estimation Method of Rotational Direction and Speed for Free-Running AC Machines Without Speed and Voltage Sensor
Author :
Iura, H. ; Ide, K. ; Hanamoto, T. ; Zhe Chen
Author_Institution :
Yaskawa Electr. Corp., Kitakyushu, Japan
Abstract :
This paper presents an estimation method of rotational direction and speed for free-running ac machines driven by an inverter without speed and voltage sensor. The method has four estimation modes, and it utilizes only the measured phase current of machines. The performance of the proposed method is verified through the experiments for both permanent-magnet synchronous motor and asynchronous machines.
Keywords :
asynchronous machines; invertors; permanent magnet motors; synchronous motors; asynchronous machines; free-running AC machines; inverter; permanent magnet synchronous motor; phase current measurement; rotational direction estimation; speed estimation; AC machines; Current control; Estimation; Frequency estimation; Inverters; Rotors; Timing; AC machines; estimation of rotational direction and speed; free running; without speed and voltage sensor;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2010.2091670
