NDLI: Performance of a high-voltage DC amplifier for electrostatic levitation applications

Content Provider	IEEE Xplore Digital Library
Author	Feng-Tian Han Zhong-Yu Gao Yong-Liang Wang
Copyright Year	1982
Abstract	High-voltage amplifiers as a means of amplifying the low-output voltage signals of the feedback controllers to the suspension voltages typically in the kilovolts range are often required for electrostatic force generation in electrostatic levitation. This paper proposes a high-voltage do amplifier including an amplitude modulator, a power amplifier, a step-up transformer, a pair of peak detectors, and a voltage feedback channel to stabilize the amplifier outputs in an effort to provide high suspension voltage and fast dynamic response. Since the various carrier frequencies have virtually no effect on the power consumption of the do amplifier by filtering out the high-frequency carrier components with peak detectors while keeping the input signal unaffected, satisfactory dynamic performance can be achieved by choosing a sufficiently high carrier frequency. The operating principle of the dc amplifier is analyzed, followed by an experimental performance evaluation and discussion for electrostatic levitation applications. The experimental results demonstrate the superiority of the high-voltage do amplifier over classical ac amplifiers in terms of dynamic response, force-voltage coefficient, voltage ripple, power consumption, and long-time stability using a carrier frequency of 30 kHz and the closed-loop control scheme.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	1253
Ending Page	1258
Page Count	6
File Size	427004
File Format	PDF
ISSN	02780046
Volume Number	50
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrostatic levitation High power amplifiers Frequency Detectors Energy consumption Adaptive control Force feedback Signal generators Amplitude modulation Output feedback
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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