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The current controller sets the base of the dynamical performance for drives running flux oriented control. In the literature, can be found different approaches used for the classical linear dq-current control. This paper has as aim a theoretical and practical benchmark of the diverse types of linear controllers suitable for drive application. There are evaluated different properties like: dynamical...
This paper presents a controller design for a fully silicon-carbide (SiC) based bidirectional three-phase grid-connected PWM drive. For drive applications, controller must be robust and fast to be able to provide power flow in both directions. In this paper, proportional resonance (PR) current controller in the stationary reference frame is used. Furthermore the influence of feedforward compensation...
This paper presents controller design procedure for a fully silicon-carbide (SiC) based three-phase grid-connected PWM drive. The influence of the feedforward compensation for the presented setup is studied and the transfer function of the system with feedforward is derived and compared with the normal condition. The presented analytical model helps to calculate the parameters of the close-loop system...
This paper presents a straightforward LCL filter design method for three-phase power factor correction rectifiers (PFCs). The imposed converter current ripple decides the minimum required converter-side inductance. For third order LCL filter, the grid current ripple can also be studied to find an optimum value for the grid filter inductor to fulfill the grid requirements. Therefore, by limiting the...
Converter losses can be reduced by use of new components like SiC or GaN, but unfortunately they come with prohibitive prices. Another way of reducing losses is employing PWM clamping techniques. The method proposed in this work is based on PWM clamping following the maximum current for reducing the switching losses of the converter. The simulation and laboratory tests are showing a relative power...
Part C early intervention is a nationwide program that serves infants and toddlers who have developmental delays. This article presents a methodology for computing a theoretical estimate of the proportion of children who are likely to be eligible for Part C services based on delays in any of the 5 developmental domains (cognitive, motor, communication, social-emotional and adaptive) that are assessed...
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