Control Method for Multi Power Supplies Interface System Using Regenerative Snubber

Bidirectional dc-dc converters are used lots of industrial areas such as electric vehicles, uninterruptable power supplies, fuel cells, solar panel cells as energy sources are searched in order to improve the quality of power at the transmission, distribution lines and other areas. The main contribution of this paper, applying the most common used control method on single phase isolated bidirectional full bridge dc-dc converter and comparing this control method (Extended Phase Shift – EPS) on efficiency way by with/without using snubber capacitors. In this paper, Isolated Bidirectional DC-DC Converter topology is modelled and controller algorithm is written by FORTRAN programming language. According to the results, it is observed that efficiency result of the converter, using snubber capacitors in the converter topology has higher performance than the snubberless system.

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Adaptive Impedance Control to Enhance Human Skill on a Haptic Interface System

Journal of Control Science and Engineering ◽

10.1155/2012/365067 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 23

Author(s):

Satoshi Suzuki ◽

Katsuhisa Furuta

Keyword(s):

Control Method ◽

Impedance Control ◽

Haptic Interface ◽

Adaptive Mechanism ◽

Virtual Model ◽

Control Performance ◽

Adaptive Law ◽

Interface System ◽

Adaptive Impedance Control ◽

Servo Controller

Adaptive assistive control for a haptic interface system is proposed in the present paper. The assistive control system consists of three subsystems: a servo controller to match the response of the controlled machine to the virtual model, an online identifier of the operator’s control characteristics, and a variable dynamics control using adaptive mechanism. The adaptive mechanism tunes an impedance of the virtual model for the haptic device according to the identified operator’s characteristics so as to enhance the operator’s control performance. The adaptive law is derived by utilizing a Lyapunov candidate function. Using a haptic interface device composed by axy-stage, an effectiveness of the proposed control method was evaluated experimentally. As a result, it was confirmed that the operator’s characteristics can be estimated sufficiently and that performance of the operation was enhanced by the variable dynamics assistive control.

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IMPROVEMENT OF POWER SUPPLY ELECTROMAGNETIC COMPATIBILITY BY EXTENSION OF CHAOS ANTICONTROL

Journal of Circuits System and Computers ◽

10.1142/s0218126605002556 ◽

2005 ◽

Vol 14 (04) ◽

pp. 757-770 ◽

Cited By ~ 11

Author(s):

CRISTINA MOREL ◽

MARC BOURCERIE ◽

FRANÇOIS CHAPEAU-BLONDEAU

Keyword(s):

Electromagnetic Compatibility ◽

Control Method ◽

Power Supplies ◽

Switching Frequency ◽

Nonlinear Feedback Control ◽

Nonlinear Feedback ◽

Spectral Emission ◽

Simple Method ◽

Switch Mode ◽

Feedback Control Method

Switch-mode power supplies usually emit electromagnetic interferences at the switching frequency and its harmonics. Inducing chaos in these systems has recently been suggested as a means of reducing these spectral emissions, yet at the expense of aggravating the overall magnitude of the ripple in the output voltage. We propose here a new nonlinear feedback control method, which induces chaos, and which is able at the same time to achieve low spectral emission and to maintain a small ripple in the output. The feasibility and usefulness of this new and simple method is shown here with a numerical example, which includes a comparison with the previous control method.

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Improving the efficiency of power supplies with an adaptive control method

2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology ◽

10.1109/ecticon.2013.6559616 ◽

2013 ◽

Cited By ~ 2

Author(s):

M. Mahdavian ◽

M. Bayati Poudeh ◽

N. Wattanapongsakorn

Keyword(s):

Adaptive Control ◽

Control Method ◽

Power Supplies

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A High-Voltage Terminal for a Field-Emission Gun

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010009539x ◽

1972 ◽

Vol 30 ◽

pp. 428-429

Author(s):

N. F. Ziegler

Keyword(s):

Field Emission ◽

High Voltage ◽

Atmospheric Pressure ◽

Power Supplies ◽

High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

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