A voltage-mode boost DC-DC converter with a constant-duty-cycle pulse control

Prepared the nanoZrO2 reinforced Cu-matrix composite by pulse electroforming. The effects of the content of nanoZrO2 particle in the casting solution, average cathodic current density, duty cycle, pulse frequency and ultrasonic power on the content of nanoZrO2 in the electroforming Cu-matrix composite have been studied. The microhardness and surface morphology of Cu-ZrO2 composite were analyzed. The experimental results demonstrate that the maximum content of nanoZrO2 in the electroforming Cu-ZrO2 composite is 2.94%, microhardness is 492 HV, which is significantly improved compared with pulse pure copper’s 337 HV, when the content of nanoZrO2 is 40 g/L, average cathodic current density is 4A/dm2, duty cycle is 0.2 , pulse frequency is 1100 Hz and ultrasonic power is 20w .The surface of composite prepared by pulse electroforming is more smooth, organization is denser, grain is finer and agglomeration of nanoZrO2 particles is fewer compared with Direct-current electroforming nanoZrO2 reinforced Cu-ZrO2 composite.

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Optimization of the envelope of a short duty cycle pulse waveform for tactile stimulation

Proceedings of 17th International Conference of the Engineering in Medicine and Biology Society ◽

10.1109/iembs.1995.579569 ◽

2002 ◽

Cited By ~ 4

Author(s):

C.A. Perez ◽

C.A. Holzmann ◽

M.E. Osorio

Keyword(s):

Duty Cycle ◽

Tactile Stimulation ◽

Pulse Waveform ◽

Cycle Pulse

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A Variable Duty Cycle Pulse Train Charger for Improving Lead-Acid Battery Performance

2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT) ◽

10.1109/acept.2017.8168559 ◽

2017 ◽

Cited By ~ 1

Author(s):

Xerxex Dan G. Gumera ◽

Aileen B. Caberos ◽

Shu-Chuan Huang ◽

Wan-Rone Liou ◽

Jia-Chuan Lin

Keyword(s):

Duty Cycle ◽

Pulse Train ◽

Lead Acid Battery ◽

Cycle Pulse ◽

Lead Acid

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Zero Voltage Soft Switching Duty Cycle Pulse Modulated High Frequency Inverter-Fed Harmonic Reduction AC-DC Converter for Consumer Magnetron Drive.

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.123.179 ◽

2003 ◽

Vol 123 (3) ◽

pp. 179-187 ◽

Cited By ~ 1

Author(s):

Manabu Ishitobi ◽

Takayuki Matsushige ◽

Mutsuo Nakaoka ◽

Daisuke Bessyo ◽

Hideki Omori ◽

...

Keyword(s):

Duty Cycle ◽

High Frequency ◽

Soft Switching ◽

Harmonic Reduction ◽

Zero Voltage ◽

Cycle Pulse ◽

Frequency Inverter

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A Study on Pulse Generator for Micro WEDM of Polycrystalline Diamond

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.516.498 ◽

2012 ◽

Vol 516 ◽

pp. 498-503 ◽

Cited By ~ 1

Author(s):

Mu Tian Yan ◽

Yi Ting Liu ◽

Guan Ren Fang

Keyword(s):

Surface Finish ◽

Duty Cycle ◽

Power Supply ◽

Pulse Generator ◽

Control Method ◽

Polycrystalline Diamond ◽

Pulse Control ◽

Peak Current ◽

Ac Power ◽

Discharge Duration

This paper presents a new pulse generator for cutting of polycrystalline diamond (PCD) by micro wire-EDM. Three pulse control methods (AC power supply pulse control method, fixed pulse width modulation pulse control method and improved AC power supply pulse control method) have been proposed to achieve high frequency and low energy discharge pulses. The improved AC power supply pulse control method enables the pulse generator to provide a period of 20 μs off duty cycle followed by a period of duty cycle for reionization of the dielectric in the spark. Compared to the other two methods, the improved AC method can provide smaller peak current and discharge duration and thereby achieve a smaller slit width and better surface finish. Tests revealed that the developed power supply using anti-electrolysis circuitry and a digital signal processor-based pulse control circuit can provide very low discharge energy pulses with a frequency of 200 KHz, discharge duration of 0.75 μs and a peak current of 3 A. Experimental results demonstrate that the proposed pulse generator can achieve a feed rate of 0.4 mm/min, a surface finish of 0.53 μm Ra and a damaged layer of 5 μm on PCD surface through proper machining settings.

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