Results 251 to 260 of about 425,800 (302)
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Fixed-Frequency Beam Steering of Microstrip Leaky-Wave Antennas Using Binary Switches
IEEE Transactions on Antennas and Propagation, 2016This paper presents a novel, easy-to-fabricate and operate, single-layer leaky-wave antenna (LWA) that is capable of digitally steering its beam at fixed frequency using only two values of bias voltages, with very small gain variation and good impedance matching while scanning.
Debabrata K. Karmokar +2 more
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Controlled resonant converters with switching frequency fixed
1987 IEEE Power Electronics Specialists Conference, 1987This paper presents a method to regulate the output voltage of resonant DC-DC converter without changing switching frequency. It is based on the concept of changing resonant frequency by using either a variable inductance circuit or a variable capacitance, which is controlled auxiliary switches.
Koosuke Harada +2 more
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A fixed switching frequency predictive current control method for switched reluctance machines
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012The paper presents a novel fixed switching frequency predictive current control method for switched reluctance machines (SRM). The proposed deadbeat predictive current controller accurately predicts the required amount of on-time for the PWM pulse for a given reference current in each digital time step over the entire speed range of operation.
Rajib Mikail +4 more
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Multi‐random PWM inverter with fixed switching frequency
Journal of the Chinese Institute of Engineers, 2003Abstract A novel multi‐random pulse width modulation (MRPWM) technique for improving the spectrum performance of an inverter is analyzed. MRPWM combines a new random time‐shift PWM scheme and a random pulse position PWM scheme, both driven at the same fixed switching frequency. Theoretical analysis of MRPWM is presented.
Jiann‐Fuh Chen +2 more
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Robust hysteresis current-controlledPWM schemewith fixed switching frequency
IEE Proceedings - Electric Power Applications, 2001A robust hysteresis current-controlled PWM scheme is presented, having constant switching frequency for a single-phase inverter with a wide frequency range. An intuitive analysis for the harmonic spectrum characteristic of the hysteresis control PWM inverter is made prior to developing the proposed switching control approach. According to the operating
B.J. Kang, C.M. Liaw
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A PWM AC-to-DC converter with fixed switching frequency
IEEE Transactions on Industry Applications, 1990For a PWM (pulsewidth-modulated) AC-to-DC converter, a predicted current control strategy with fixed switching frequency (PCFF control) is proposed. Its principle and implementation are described, and experimental results are provided which show that the converter under PCFF control has bidirectional power transmission ability with high dynamic ...
R. Wu, S.B. Dewan, G.R. Slemon
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Fixed switching frequency scheme for current predictive control of DFIG
2022This paper suggests a new current predictive control algorithm for the wind-driven doubly-fed induction generator (DFIG) based on space vector modulation (SVM) with fixed switching frequency. Combining the current predictive controller and SVM has the benefits of a predictive controller, and fixing the switching frequency improves the output waveform ...
Younesi, Aria +2 more
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Fixed-frequency buck-boost zero-voltage-switched quasiresonant converter
IEE Proceedings - Electric Power Applications, 1995The paper presents the analysis and design of a fixed-frequency buck-boost zero voltage-switched quasi-resonant power converter topology. Although the analysis of such a converter presents some difficulties that do not exist in other power converter schemes, the aim of the paper is to point out and investigate these difficulties and to provide a design
G.A. Karvelis, S.N. Manias
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Univesal Design of LLC Resonant Converter with Fixed Switching Frequency
2020 IEEE International Conference on Information Technology,Big Data and Artificial Intelligence (ICIBA), 2020In this paper, a universal design for the LLC resonant converter with fixed switching frequency is proposed. In order to realize zero voltage switching (ZVS) and zero current switching (ZCS), the fixed switching frequency is selected slightly lower than the resonant frequency.
Jiangtao Xu +5 more
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