NDLI: Sensorless position control of active magnetic bearings based on high frequency signal injection with digital signal processing

Content Provider	IEEE Xplore Digital Library
Author	Jung-Sik Yim Seung-Ki Sul Hyeong-Joon Ahn Dong-Chul Han
Copyright Year	2004
Description	Author affiliation: Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea (Jung-Sik Yim; Seung-Ki Sul)
Abstract	The high frequency signal injection method in the sensorless position control of active magnetic bearings (AMB), has some merits such in that there is no steady-state error in the estimated position and can control the amplitude of the signals used for position estimation. In this paper, a method to inject a high frequency signal and to process the signal to obtain the position of the rotor has been proposed. In this method, all the signal processing is done in the digital domain, and in contrast to the analog method, there is no offset nor are there any continuous tuning problems. The proposed method does not need additional hardware for signal injection and signal processing. The PWM inverter, which is used to regulate coil current, generates the injection signal, and the DSP, which is used to control the system, performs signal processing in a normal sampling cycle. The experimental results show reasonable performance with regard to the 4-degree-of-freedom control of rotor position, while rotating at 30,000 [r/min].
Sponsorship	IEEE Power Sources Manufacturers Association PELS IEEE Industry Applications Soc
Starting Page	1351
Ending Page	1354
File Size	1591574
Page Count	4
File Format	PDF
ISBN	0780382692
DOI	10.1109/APEC.2004.1295998
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Position control Magnetic levitation Signal processing Digital signal processing Frequency estimation Amplitude estimation Steady-state Error correction Sensorless control Tuning
Content Type	Text
Resource Type	Article

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