Results 291 to 300 of about 157,953 (310)
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Nonlinear modelling of the PWM switch
PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference, 1989It 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.
W.T. Baumann +3 more
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IEEE Transactions on Instrumentation and Measurement, 1987
A modular pulse-width modulation (PWM) power amplifier parallelable up to 47-KW peak is being used in magnetic resonance imaging (MRI), dc servo, audio, and other electromagnetic applications. Each of two independent half bridges in a module contains its own output filters and a multiple loop feedback system that equalizes power sharing, damps load ...
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A modular pulse-width modulation (PWM) power amplifier parallelable up to 47-KW peak is being used in magnetic resonance imaging (MRI), dc servo, audio, and other electromagnetic applications. Each of two independent half bridges in a module contains its own output filters and a multiple loop feedback system that equalizes power sharing, damps load ...
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The characteristics of conducted EMI emission on PWM inverters with various PWM patterns
2002 3rd International Symposium on Electromagnetic Compatibility, 2003In 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.
S. Nitta, K. Karanun, W. Khan-ngern
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Unipolar PWM vs Bipolar PWM in Three Phase Block Commutation
2020 International Semiconductor Conference (CAS), 2020This paper intended to present a synthesis of the activity dedicated to the design of the control strategies of the block commutation for BLDC motors. The paper is useful to understand the concepts of Unipolar PWM vs Bipolar PWM electronic circuit design used in BLDC.
V. Trifa, Emilian Ceuca, Gh. Brezeanu
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A unified PWM strategy for matrix converters and its dipolar PWM realization
The 2010 International Power Electronics Conference - ECCE ASIA -, 2010This 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.
Somboon Sangwongwanich +1 more
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2018
Digital current controllers are used in grid-side inverters, generator-side inverters, electrical drives, and many other applications. Their purpose is to control the electrical current injected into the grid or the electrical current supplied to the windings of an electrical machine.
Slobodan N. Vukosavic +1 more
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Digital current controllers are used in grid-side inverters, generator-side inverters, electrical drives, and many other applications. Their purpose is to control the electrical current injected into the grid or the electrical current supplied to the windings of an electrical machine.
Slobodan N. Vukosavic +1 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, 2002This 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
Ick Choy +3 more
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A Novel Predictive Control For PWM Rectifier
2007 IEEE International Electric Machines & Drives Conference, 2007A novel predictive control for PWM rectifier is proposed in this paper. The algorithm is based on a step-by-step prediction of the converter variables, on the basis of the actual power request and operating conditions. In particular, the control algorithm carries out the converter modulation pattern, in order to achieve a unity power factor at the ...
V. NARDI +3 more
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IEEE Aerospace and Electronic Systems Magazine, 1992
The approach used to optimize a transistorized pulsewidth-modulated inverter used in an uninterruptible power supply is detailed. Through the use of computer modeling with a space state-model, a variety of scenarios for the optimal inverter design were evaluated.
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The approach used to optimize a transistorized pulsewidth-modulated inverter used in an uninterruptible power supply is detailed. Through the use of computer modeling with a space state-model, a variety of scenarios for the optimal inverter design were evaluated.
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A new direct digital PWM technique for microprocessor-based PWM inverters
PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, 2002This paper describes a new pulse width modulation (PWM) scheme suitable for a microprocessor-based PWM inverter. Optimal switching patterns (i.e., width and position of the pulses) minimizing a performance index can be generated in real time by numerical calculation using the microprocessor-based control system.
H.S. Mok +3 more
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