The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a high-efficiency one stage ZVS-PWM resonant single-ended push-pull (SEPP) high frequency inverter with new PFC functional scheme. This high-frequency resonant power converter with lossless snubbing capacitors which is composed of a passive PFC converter operating at one diode conducting full bridge circuit mode consists of asymmetrical ZVS-PWM high frequency inverter with non-bulky...
The hexagram inverter is composed of six voltage source inverter (VSI) modules interconnected through the inductors, which are required to suppress the circulating current that resulted from the modular interconnection. Design of the inductor is a challenge, where the inductance should be large enough to suppress the circulating current but small enough to minimize additional voltage drop that affects...
This paper presents a high performance interior permanent magnet (IPM) machine drive using a current source inverter for EV/HEV applications. The constant power operation regions of an IPM machine can be greatly extended due to the voltage-boosting function naturally associated with the CSI and the field weakening techniques. An equivalent circuit model of the IPM machine including the effects of...
A simplified dc equivalent model of a series compensated pickup in an Inductive Power Transfer (IPT) system is derived along with design equations to replace rule of thumb guidelines used in the selection of the regulator capacitor. The design of the regulator capacitor and its effect on circuit behaviour is verified under both simulated and experimental conditions at rated load and light load.
Voltage balance of DC link capacitors is a problem in diode clamped multilevel inverters. In this work, a simple equivalent circuit, to predict the deviation of capacitor voltages for different operation modes, is presented. This model is used together with line voltage redundancy to develop an optimization algorithm to minimize the voltage deviation among different capacitors. This allows selecting...
This paper is the second part of a paper proposing methods and algorithms for the estimation of the induction motor equivalent circuit parameters starting from the geometrical and electrical data generally available after an electromagnetic design. This second part includes an approach for the skin effect determination in arbitrary shape rotor slots, (based on the elementary layer method). In addition,...
The paper deals with methods and algorithms for the estimation of the induction motor equivalent circuit parameters starting from the geometrical and electrical data generally available after an electromagnetic design. The main aim of the paper is to help the readers to pass from the theoretical analysis to numerical code suitable to be included in own design software. For this reason, the step-by-step...
In this work is presenting a reactive homopolar synchronous machine with stator excitation (RHSMSE) destined to operate as generator for hydroelectric or wind power stations of low and middle power or as servomotor with reduced inertia. By means of the equivalent magnetic circuits method is deduced a mathematic model based on which is simulated the main measures that features the machinepsilas operation...
This paper studies passive filters for harmonic reduction in high power rectifiers. The paper presents some of the most important configurations of high power filter employed in medium voltage applications. The paper as well includes the ideal mathematic equations and models for those filters, and then compares the filter performances. In a very broad sense, the addition of some resonant harmonic...
This paper presents a three-phase unified power quality conditioner (UPQC) based on two types of power cells. Differently to topologies based on symmetrical units, the proposed topology is assembled using one type of single-phase power cells for compensating disturbances at the fundamental frequency and another type for compensating harmonic currents. This feature allows the implementation of the...
A circuit topology of the forward-mode three-level AC/AC converter is proposed. The kind of circuit topologies are constituted of multilevel converter, high frequency transformer, output cycloconverter, and output filters. The converter has the advantages such as concise circuit structure, two-stage power conversions, bidirectional power flow, high frequency electrical isolation, three-level voltage...
A novel third-order sliding mode control strategy for Buck inverter is proposed based on Lie derivative method in this paper. The geometry associated with the sliding mode control is presented for the analysis and design of the control scheme. The inverter is composed of two symmetrical current bi-directional Buck converters controlled by two independent sliding mode controllers. Base on the equivalent...
This paper presents an economic and automatic experimental technique that allows the determination of the equivalent circuit of aluminum electrolytic capacitors at their operating conditions. The equivalent circuit of an electrolytic capacitor comprises an equivalent series inductance (ESL), an equivalent series resistance (ESR) and a capacitance (C). Both C and ESR values change with frequency, temperature...
The paper presents design, modeling, control and implementation of a ldquolong-pulserdquo three-phase resonant converter. A DQ equivalent circuit model of the resonant tank system is established first. Based on that, a model of the whole power supply and a state space multivariable feedback control has been developed. The soft switching, zero current switching (ZCS), is achieved by combining frequency...
The flux reversal machine (FRM) topology is best suited for low speed low power application. Fractional-slot, concentrated winding, surface permanent magnet machine (FSCWS-PMSM) is also suitable for this application. Comparative study of electro-magnetic performance of FRM and FSCWS-PMSM is carried out. This study is performed for same physical dimensions, rated speed, magnetic and electric loadings...
This paper presents a generalized mathematical model for a vector inversion generator, through which semi-analytical solutions for component stresses and output characteristics can be obtained. The derivation of a simplified equivalent circuit for transient analysis of the converter is presented in detail. The equivalent circuit model is used to analyze the performance of a 2-stage and 6-stage vector...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.