Results 211 to 220 of about 56,128 (237)

Multilevel PWM methods at low modulation indices

IEEE Transactions on Power Electronics, 1999
When utilized at low amplitude modulation indices, existing multilevel carrier-based PWM strategies have no special provisions for this operating region, and several levels of the inverter go unused. This paper proposes some novel multilevel PWM strategies to take advantage of the multiple levels in both a diode-clamped inverter and a cascaded H ...
L.M. Tolbert, F.Z. Peng, T.G. Habetler
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Modulating functions for modelling PWM switching converters

IEE Proceedings - Electric Power Applications, 2005
The aim of the work is to identify continuous average models of switching converters from input-output data. Among the various identification techniques, modulating functions were chosen due to their capability for revealing converter dynamics, even in the case of fast time constants.
LANDI, ALBERTO, SANI, LUCA
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Near-Optimum On-Line Modulation of PWM Inverters

IFAC Proceedings Volumes, 1983
Abstract The paper analyses the influence of the total harmonic deviation on supplementary losses and torque pulsations in the induction motor. By dissembling the deviation between the stator flux-linkage polygon and the fundamental circle into its components, a new insight is won.
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Practical real-time PWM modulators: an assessment

IEE Proceedings B Electric Power Applications, 1992
Many techniques have been proposed for generating PWM waveforms for controlling AC motor drives. The authors demonstrate the practicality of generating real-time, software-based PWM waveforms using low-cost microprocessors. They use a space vector methodology and extend the concept of a computationally efficient trapezoidal modulation strategy to more ...
P.G. Handley, J.T. Boys
openaire   +1 more source

Research of Chain-SVG PWM Modulation Strategy

Advanced Materials Research, 2014
With the rapid development of control theory and microprocessor, many new rectifier control strategy has been born. In current power system, the rapid development of full-control devices, the high application of converter makes the electricity demand is higher and higher.
Lin Liu, Zhong Chu Wang, Chun Bo Gu
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Performance Analysis of Delta Modulated PWM Inverters

IEEE Transactions on Power Electronics, 1987
An analysis is presented of a voltage source delta modulation (DM) inverter. The delta modulation method provides several advantageous characteristics over commonly used sine modulation process. It is relatively easy to implement and provides low harmonics at the inverter output.
M. Azizur Rahman, John E. Quaicoe, M. A. Choudhury   +2 more
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PWM technique with partially constant modulating waves

Electrical Engineering, 1999
In this paper, a new method for controlling the amplitude and frequency of the sinusoidal output voltages from the PWM inverter has been presented. By using modulating waves of constant amplitudes on angles of tt/3, the following advantages can be obtained: —Reducing the switchings number in the PWM inverter by 33%; —The fundamental amplitude
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Understanding the PWM Nonlinearity: Single-Sided Modulation

IEEE Transactions on Power Electronics, 2012
This paper provides a new look at the mechanisms underlying pulse width modulation (PWM). A simple approach to analyze the behavior of a single-sided pulse width modulator is presented. By using elementary methods, the pulse-width-modulated waveform is written as the sum of two sawtooth functions and the original modulating waveform.
Mouton H., Putzeys B.
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Indirect modulation for current source PWM converter

2017 IEEE 26th International Symposium on Industrial Electronics (ISIE), 2017
Compared with carrier based sinusoidal pulse width modulation (SPWM), space vector pulse width modulation (SVPWM) is widely used because of its higher current (voltage) utilization factor. In current source converter (CSC), SVPWM technique is harder to achieve than voltage source converter (VSC). To make the implementation of CSC SVPWM technique easier,
Jialin Zhang, Yiming Zhang, Dakang Yuan
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Digital PWM Control for Isolated DC-DC Converters with Two Pulses Modulating PWM

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009
This paper describes a novel digital control solution for isolated DC-DC converter. Compared with non-isolated DC-DC converters, isolated ones need to realize isolation of control between primary and secondary side. In this paper, the whole digital control system is implemented using two FPGAs.
Weiyi Feng, Xu Yang, Haizhong Ye, Xianwei Wang, Guochun Xiao   +4 more
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