Title :
An estimation method of rotational direction and speed for free running AC machines without speed and voltage sensor
Author :
Iura, Hideaki ; Chen, Zhe ; Ide, Kozo ; Hanamoto, Tsuyoshi
Author_Institution :
Inverter Dev. Dept., 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 the method utilized only the measured phase current of machines. The amplitude of current during the estimation is suppressed to lower levels such as the exciting current, which is smaller than the rated value. Good performance of this method is confirmed by the experiment.
Keywords :
AC machines; angular velocity control; invertors; parameter estimation; sensorless machine control; AC machines; phase current; rotational direction estimation; sensorless machine control; speed estimation; AC machines; Frequency estimation; Inverters; Life estimation; Permanent magnet machines; Phase estimation; Power supplies; Research and development; Sensor systems; Voltage; AC Machines; Estimation of Rotational direction and Speed; Free running; without Speed and Voltage Sensor;
Conference_Titel :
Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5177-7
Electronic_ISBN :
978-4-88686-067-5
DOI :
10.1109/ICEMS.2009.5382762
