Results 191 to 200 of about 15,594 (232)

PWM converters with resistive input

IEEE Transactions on Industrial Electronics, 1998
An average modeling methodology is proposed for deriving pulsewidth modulation (PWM) programming rules that cause DC-DC converters to look resistive at the input terminals. The method can be useful in the design of active power factor correctors that do not need to sense the input voltage.
Shmuel Ben-Yaakov, Ilya Zeltser
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Minimum-loss PWM strategy for 3-phase PWM rectifier

PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972, 1997
In this paper, the conduction and switching losses of a three-phase PWM rectifier are analyzed for various PWM schemes. On the basis of these results, a novel PWM strategy which minimizes the loss of a voltage-fed three-phase PWM rectifier is developed. This minimization results from the following two factors: (a) low switching frequency ratio; and (b)
null Dae-Woong Chung, Seung-Ki Sul
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On the ZVT-PWM Cuk converter

IEEE Transactions on Industrial Electronics, 1998
A modified zero voltage transition pulsewidth modulation (ZVT-PWM) Cuk converter is proposed in this letter. Better robustness, smaller minimum duty ratio, and lower turn-on loss are obtained in this converter. No additional component is needed compared with the conventional ZVT-PWM Cuk converter.
Tseng, Ching-Jung, Chen, Chern-Lin
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Nonlinear modelling of the PWM switch

PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference, 1989
It is shown that nonlinearity due to the switching action in pulse width-modulated (PWM) DC-to-DC converters, DC-to-AC inverters or amplifiers, and input-current-shaping DC-to-DC converters can often conveniently be confined to a three-terminal structure referred to as the PWM switch.
R. Tymerski, V. Vorperian, F.C.Y. Lee, W.T. Baumann   +3 more
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New PWM method for single-phase three-level PWM rectifiers

ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics, 2002
This paper presents a simple switching method to generate a PWM pattern mostly relevant to single-phase three-level PWM rectifiers. The adopted PWM switching pattern is performed in a manner similar to the space vector PWM method, which is popularly used in three-phase rectifiers and inverters. A set of possible voltages is selected so that an equation
null Joong-Ho Song, null Sung-Joon Cho, null Ick Choy, null Ju-Yeop Choi   +3 more
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A unified PWM strategy for matrix converters and its dipolar PWM realization

The 2010 International Power Electronics Conference - ECCE ASIA -, 2010
This paper proposes a unified algorithm for PWM strategies of matrix converters. A general form of the modulation functions for the matrix converter is derived based on the geometric transformation approach. The research results reveal that each allowable modulation matrix can be expressed as an indirect modulation.
Paiboon Kiatsookkanatorn, Somboon Sangwongwanich   +1 more
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The characteristics of conducted EMI emission on PWM inverters with various PWM patterns

2002 3rd International Symposium on Electromagnetic Compatibility, 2003
In this paper, characteristics of conducted electromagnetic interference (EMI) emissions of three phase voltage source PWM inverters are presented. The conducted EMI emission levels of PWM inverters on various patterns: SPWM, DPWM60/spl deg/ and THIPWM techniques are focused.
K. Karanun, W. Khan-ngern, S. Nitta
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A Novel ZCS-PWM Flyback Converter With a Simple ZCS-PWM Commutation Cell

IEEE Transactions on Industrial Electronics, 2008
This paper proposes a novel zero-current-switching pulsewidth-modulation (ZCS-PWM) flyback dc/dc converter using a simple ZCS-PWM commutation cell. The main switch and auxiliary switch operate at ZCS turn-on and turn-off conditions, and all uncontrolled devices in the proposed converter operate at zero-voltage-switching (ZVS) turn-on and turn-off.
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PWM methods evolution

2016 13th International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE), 2016
The article deals with the experience of the first descriptions of the methods of pulse width modulation in the power electronics from the start of its use to the present day. Development of PWM in the 20th century made mainly from publications of the USSR period and the development of multi-level PWM inverters made available by the publications of ...
I.A. Bakhovtsev, G.S. Zinovev
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PWM conductance control

PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference, 2003
Conductance (or current) control of switching regulators generally uses peak or hysteresis (e.g. LC/sup 3/) controllers, the advantages and problems of which have been widely reported. The behavior of a simple conventional pulsewidth-modulated (PWM) conductance control principle that has been used on space programs is described and analyzed.
D. O'Sullivan, H. Spruyt, A. Crausaz
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