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This paper presents design and implementation of a Integrated boost-flyback converter (IBFC). Operation of the IBFC is described and its key voltage and current equations are given. The practical design of a 96W, 12V-to-48V, IBFC is demonstrated. Experiment on the prototype IBFC shows that it operates with good output voltage regulation and achieves the highest efficiency of 87%.
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...
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...
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...
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,...
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...
To cope with power from large-scale renewable systems, more and more power electronic converters are used in parallel. Typically, carrier interleaving is used, thus leading to a decrease in filtering requirements. However, this causes additional circulating current to flow between the modules of the converter. The modules of the parallel converters are Voltage Source Converters (VSC). Usually, a coupled...
In this paper, the influence of parasitic components of LLC resonant dc-dc converters operated at MHz-level switching frequency is investigated. In MHz-level switching frequency, value of the parasitic components are getting closer to value of circuit parameters. Therefore, influence of the parasitic components cannot be neglected even in the initial step of the circuit design. In particular, undesirable...
This paper evaluates the fault detection performance of stator winding turn-to-turn short in the inverter-fed permanent magnet (PM) machines based on the high frequency (HF) voltage signal injection. On the basis, a HF pulsating-type AC voltage is injected on the direction of d-axis with respect to the rotor-referred synchronous frame. Once turn short occurs, a fault reflected current signal results...
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...
Brushless Generation Systems are currently in great demand for remote area micro-grid application. Dual Stator Winding Induction Generator(DSWIG), having two windings on the stator of same pole configuration and a squirrel cage rotor, has been identified as one of the suitable candidates for such application. In most of the configurations proposed so far, one of the winding is responsible for power...
The proposed converter has the following features: 1) zero current commutation (ZCC) and natural voltage clamping (NVC) eliminate the need for active-clamp circuits or passive snubbers required to absorb surge voltage in conventional current-fed topologies; 2) Switching losses are reduced significantly owing to zero-current switching (ZCS) of primary side devices and zero-voltage switching (ZVS) of...
Electric vehicles (EVs) are very useful but suffer from limited range and long battery charge time. Using wireless power transfer (WPT) allows these issues to be solved. In WPT, the control of the power converters is very important in order to achieve high efficiency and be able to extract the desired power from the source at any time. Until now, it was possible to perform either power control or...
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...
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...
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...
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...
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 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 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...
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