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In this study, a high voltage-boosting converter is presented, which combines a coupled inductor, a charge pump capacitor, and active clamp circuit, so as to boost up the output voltage as well as to make the main switch turned on with zero voltage switching. In this converter, the coupled inductor behaves as not only an inductor but also a transformer. And, the active clamp switch in the active clamp...
A 4-phase wound-field doubly salient generator is researched in this paper. The no-load situation is analyzed ideally and simulated by finite element method. The average inductance of the phase winding, which reaches over 50mH, causes low power factor and decreases the output power. To improve the output power, the capacitors are introduced to compensate the inductive current. For the no-load situation,...
Dual-buck circuit has higher reliability as it overcomes the straight-leg problem existing in the traditional bridge circuit. However, more magnetic components are needed in this topology, especially in three-phase dual buck inverter. Magnetic integration is a good way to reduce the volume and weight of the magnetic components and improve the density of the system. The coupled-inductor dual-buck circuit...
This paper presents a novel terminal sliding mode (TSM) control scheme with double closed-loop structure of capacitor voltage and inductance current for the stability control of DC-DC buck converter. In order to satisfy the different performance demands of capacitor voltage and inductance current, a TSM controller and a linear sliding mode (LSM) controller is designed separately. For the former, TSM...
The dc-dc converters which are suitable for the fuel cell need high boost ability, low input current ripple, and small size. As one of the dc-dc converters having the three characteristics, interleaved soft-switching multilevel boost converter is proposed. This circuit is composed of two multilevel boost converter parts and an auxiliary inductor. By the auxiliary inductor, the switches can achieve...
Although Single-Sided Linear Induction Machines (SLIMs) have been analyzed and tested intensively as prime movers for different applications in literature, their application for energy harvesting has not been studied rigorously. This paper investigates the use of SLIMs for watt-range energy harvesting from a moving steel body with smooth surface (solid steel secondary) in order to supply control electronics...
This paper proposes a mathematical model for surface mounted permanent magnet machines (SPM) considering saturation effect due to armature reaction. Saturation in nonlinear ferromagnetic stator core brings a quasi-sinusoidal reluctance distribution in the circumferential direction. An equivalent virtual salient rotor (EVSR) is placed in the physical rotor position to represent the variation of reluctance...
The dual-active-bridge (DAB) topology is ideally suited for bidirectional power transfer. However, the zero-voltage switching (ZVS) range of this topology is limited. Operating in ZVS mode can increase low range power transfer. This paper revised and simplified calculation of ZVS range for single pulse-width modulation (SPWM) and dual pulse-width modulation (DPWM) controls, and power transfer for...
In the wind power application, different asymmetrical types of the grid fault can be categorized after the Y/d transformer, and the positive and negative components of a single-phase fault, phase-to-phase fault, and two-phase fault can be summarized. Due to the newly introduced negative and even the natural component of the Doubly-Fed Induction Generator (DFIG) stator flux during the fault period,...
This paper presents a novel modulation strategy for a Modular Multiphase Multilevel Converter especially for the usage in Power Hardware-in-the-Loop Emulation Systems. The proposed modulation scheme generates the required voltage time area by means of an integrator in a quasi continuous operation mode. Therefore, the fixed modulation period is disestablished to achieve a minimum response time of the...
Series-series (SS) compensation is widely used in contactless power transfer (CPT) for electric vehicle because of their constant current and constant voltage charging features. In this paper, a mathematical model of SS compensation for CPT system is presented. This model includes the effects of harmonics on parameters of SS compensated CPT system. Fourier series analysis is used for mathematical...
Energy production or critical applications need fault tolerant operation. Six-phase induction machine (SC6PIG) increases the reliability by allowing the loss of up to 3 phases. Associated with a relevant novel control able to adapt itself to the new configuration, operation can keep on under fault. A novel strategy of control is here proposed with sensorless control. This strategy nonetheless focus...
For applications requiring power conversion from an input voltage of several kilovolts, like power supplies in railway systems, a new soft-switching PWM full-bridge converter of buck type is proposed. The active snubber used in this purpose is formed by two transistors operated alternatively in each half-cycle and one resonant capacitor, and is inserted in the secondary-side. All the main primary-side...
The grid connected photovoltaic (PV) system have been modeled and simulated using control algorithm with dedicated PI control for dc link voltage regulation. Generally, the PI controller used for the system is tuned using trial and error method but this method is having manual limitation for the tuning of controller so as to obtain the desired response like as regulating dc link voltage to reference...
This paper further demonstrates the versatility of the Tapped Inductor Switcher (TIS) analysis method proposed in a previous paper. The aim is to extend the application of this modeling technique to converters containing multiple inductive elements. As a study case, a tapped inductor SEPIC derived dc/dc converter is considered. The study from this paper suggests that the SEPIC can be modeled by two...
The simulation of a direct torque hysteresis controller (DTHC) driving an interior permanent magnet synchronous machine (IPMSM) is presented in this paper. The underlying switching concept as well as a proposed experimental setup is discussed. Various simulations, varying the torque and current tolerances, are carried out in the low torque and high torque range. Simulation results show a direct influence...
Magnetic coupled resonance Wireless Power Transfer (MCR-WPT) system has many advantages in mid-range power transfer applications. Class-E amplifier is a suitable high frequency power source for MCR-WPT system because it has merits of simple circuit structure and high conversion efficiency. However, the power transfer efficiency drops rapidly and class-E amplifier works in bad conditions because the...
This paper proposes a direct rotor-position estimation method for IPMSMs (Interior Permanent Magnet Synchronous Motors) in low-speed regions including standstill. In general, the rotor position is estimated indirectly by converging the position estimation error into 0 by the phase-locked-loop (PLL). The indirect rotor position estimation methods require the convergence time of position estimation...
In this paper, two types of isolated converter topologies for the implementation of the galvanic isolation of a low-voltage DC network is discussed. Advantages and problems of the topologies are compared and a selection for the suitable topology for two conversion ratios, 1:1 and 2:1 is carried out. The selection is carried out by comparing the life-cycle costs of the converters if used in the low...
The paper is concerned with the soft-switching capabilities of the Single Active Bridge (SAB) converter. At first, soft-switching of the double active bridge converter is reviewed. Then, operation of the SAB converter is investigated with the end of assessing its soft-switching capabilities in both the discontinuous and continuous conduction mode. It is found that the SAB converter experiences either...
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