An efficient technique for the time-domain simulation of power electronic circuits

Step down DC-DC converters are power electronic circuits, which mainly used to convert voltage from a level to a lower level. In this paper, a discontinuous controller is proposed as a control method in order to control Step-Down DC-DC converters. A Lyapunov stability criterion is used to mathematically prove the ability of the proposed controller to give the desired voltage. Simulationsl1 are performedl1 in MATLABl1 software. The simulationl1 resultsl1 are presentedl1 for changesl1 in referencel1 voltagel1 and inputl1 voltagel1 as well as stepl1 loadl1 variations. The resultsl1 showl1 the goodl1 performancel1 of the proposedl1 discontinuousl1 controller.

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Convolution-based time-domain simulation for fluidelastic instability in tube arrays

Nonlinear Dynamics ◽

10.1007/s11071-021-06475-3 ◽

2021 ◽

Author(s):

Mingjie Zhang ◽

Ole Øiseth

Keyword(s):

Impulse Response ◽

Response Function ◽

Time Domain ◽

Impulse Response Function ◽

Time Domain Simulation ◽

Unit Step ◽

Tube Arrays ◽

Unit Impulse ◽

The Time Domain ◽

Unit Impulse Response

AbstractA convolution-based numerical algorithm is presented for the time-domain analysis of fluidelastic instability in tube arrays, emphasizing in detail some key numerical issues involved in the time-domain simulation. The unit-step and unit-impulse response functions, as two elementary building blocks for the time-domain analysis, are interpreted systematically. An amplitude-dependent unit-step or unit-impulse response function is introduced to capture the main features of the nonlinear fluidelastic (FE) forces. Connections of these elementary functions with conventional frequency-domain unsteady FE force coefficients are discussed to facilitate the identification of model parameters. Due to the lack of a reliable method to directly identify the unit-step or unit-impulse response function, the response function is indirectly identified based on the unsteady FE force coefficients. However, the transient feature captured by the indirectly identified response function may not be consistent with the physical fluid-memory effects. A recursive function is derived for FE force simulation to reduce the computational cost of the convolution operation. Numerical examples of two tube arrays, containing both a single flexible tube and multiple flexible tubes, are provided to validate the fidelity of the time-domain simulation. It is proven that the present time-domain simulation can achieve the same level of accuracy as the frequency-domain simulation based on the unsteady FE force coefficients. The convolution-based time-domain simulation can be used to more accurately evaluate the integrity of tube arrays by considering various nonlinear effects and non-uniform flow conditions. However, the indirectly identified unit-step or unit-impulse response function may fail to capture the underlying discontinuity in the stability curve due to the prespecified expression for fluid-memory effects.

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Fault Detection and Classification in Power Electronic Circuits Using Wavelet Transform and Neural Network

Journal of Computer Science ◽

10.3844/jcssp.2011.95.100 ◽

2011 ◽

Vol 7 (1) ◽

pp. 95-100 ◽

Cited By ~ 6

Author(s):

Prasannamoorthy

Keyword(s):

Neural Network ◽

Wavelet Transform ◽

Fault Detection ◽

Power Electronic ◽

Electronic Circuits ◽

Fault Detection And Classification ◽

Power Electronic Circuits

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On Walsh/block pulse domain analysis of power electronic circuits Part 2. Continuously pulse-width modulated inverter

International Journal of Electronics ◽

10.1080/00207219508926321 ◽

1995 ◽

Vol 79 (6) ◽

pp. 885-895 ◽

Cited By ~ 3

Author(s):

ANISH DEB ◽

ASIT K. DATTA

Keyword(s):

Pulse Width ◽

Domain Analysis ◽

Power Electronic ◽

Electronic Circuits ◽

Pulse Width Modulated ◽

Power Electronic Circuits

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