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

fYear

2009

fDate

15-18 Nov. 2009

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICEMS.2009.5382762

Filename

5382762