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This paper proposed a model of contactless power transfer system (CPTS), which adopted a transformer with big air-gap and long primary wires. The system has the characters of long leakage inductance, small magnetizing inductance and low coupling coefficient. It makes the transmission efficiency very low, this model improved system efficiency by adopting resonance of compensation capacitance and leakage...
This paper proposes a black box approach which synthesizes lumped circuit model of the Foster type for a frequency-dependent characteristic element by the least squares method systematically. However there are two numerical difficulties to model them. One is the numerical stability problem which comes from limitation of effective numerical digits of data especially for wide frequency band ranges....
In order to design a high performance power electronics circuit, a precise simulation environment is essential for the controller design. In this paper, a power electronic circuit real-time simulator was designed and realized on a DSP chip. The dynamic equations of a power electronics circuit were coded on a Texas Instruments (TI) made C6416 fixed point DSP. Meanwhile, the interrupt interface of the...
This paper presents a 2-D nonlinear time-harmonic finite element model of induction motor for use in the accurate dynamic simulation. In the proposed model, it is not necessary to rotate the rotor, the resistivity of the rotor material is modified in terms of the specified load condition. The nonlinear properties are represented by using the effective magnetization curve. The field-coupled circuit...
This paper introduces a novel simulation algorithm for closed loop frequency response analysis by Fourier Transform Method (FTM). FTM is reviewed briefly and novel analysis algorithm is described. The simulator employing this novel algorithm is developed and demonstrated for a buck converter with feedback. The simulation result is in good agreement with the experimental result.
Real-time simulation is an important issue in the design of power electronic systems, especially in the context of hardware-in-loop (HIL) simulation. This paper is concerned with the development of a real-time simulation environment that is low-cost and can be easily set up in an educational laboratory. Any real-time simulation environment needs three essential components: a mechanism to accept a...
An observer-based thermal modelling technique suitable for computation on embedded microprocessors to provide system wide prediction and projection of thermal state of function for a minimum increase in part count is proposed. High accuracy 3D finite element simulation is employed to calibrate a low complexity lumped parameter model from which a Luenberger observer is derived. Only a single temperature...
Computational fuel cell dynamic (CFCD) modeling is considered the most accurate tool for a better FC design and understanding. CFCD models have already proved the effect of the water membrane content in the dynamic response of a proton exchange membrane (PEM) FC. However, these models require high computational resources and they are not easy to interconnect with the usual electrical circuit simulation...
In this paper, a novel power converter for electric vehicles (EVs) is proposed. The proposed converter has a Z-source inverter which drives an ac motor, and performs as a current-fed Z-source dc-dc converter against reverse power flow. Thus, the proposed circuit does not need a bi-directional buck-boost dc-dc converter. The operation of the proposed converter was simulated by MATLAB SIMULINK and tested...
In this paper, a novel high-voltage generator-Homopolar Inductor Alternator (HIA) pulse-charge for the capacitor bank with repetitive frequency though inertial energy storage system has been designed. A diesel engine provides energy as a prime motor in this system, and then drives the HIA to the rated speed by the flywheel energy storage device, the AC pulse-charge for the capacitor bank with repetitive...
This paper presents the design of an FPGA-based digital control IC of maximum-power-point-tracking (MPPT) charger for vertical-axis wind turbine generators. The output of the charger can be connected to a 48V battery to supply power to a DC load or an electric vehicle drive system. A novel MPPT scheme, which is the mixing of the conventional perturbation and observation method and a linear approximation...
This paper presents a new approach to MOSFET modeling using a state-space technique. The model is based on discrete elements whose values are extracted from measurements, datasheet parameters and SPICE?? equations. The switching characteristics of the component are strongly determined by the gate-drain capacitance (CGD). With help of thorough impedance measurements, characterization of this capacitance...
With the increasing complexity of the circuits it is essential that students work on the experiments which enhance their circuit analysis and design skills. Circuit simulation tools like PSpice and Multisim are extremely useful tools in understanding the operation of the circuits. However undergraduate level simulation experiments are limited to very simple experiments and mostly concentrate upon...
Quick detection of a small initial fault is important for an AC motor drive system to prevent a consequent large fault. Papers for the detection have been proposed, for example, by the park vector (PV), the AI techniques, the wavelet analysis, and the negative sequence analysis approaches. This paper proposes a diagnostic method of a stator winding fault of an induction motor by combination of the...
Based on the special application of electronic ballast in movie and television industry, a novel electronic igniter for HID lamps has been investigated in this paper. Compared with the traditional magnetic igniter, the circuit has many good performances such as substantially less volume and weight. The main contributions are as the followings: (1) A model of the igniter has been put forward to analyze...
In this paper, a novel discrete model has been proposed to simulate the controller IC UC3854. The main contributions are as followings: 1) The power stage of the Boost converter has been modeled by using the large signal approach and the loop gain of current program has been put forward; 2) The continues-time voltage control diagram has been investigated by employing equivalent power stage which contains...
This paper presents the system modeling and analysis of the single-phase current regulation module (CRM) in continuous-conduction-mode (CCM) at steady state for use in the electrical discharge machines (EDMs). Based on the equivalent model of the three-terminal PWM switching cell, the small-signal equivalent circuit models of the single-phase CRM are obtained to derive the corresponding open-loop...
In this paper, variation of output power of class E amplifier as a function of switching frequency is obtained in an analytical form. Class E amplifier is operated with varying switching frequency in order to keep zero-voltage switching and zero voltage slope switching in varying load conditions. The output power of the class E amplifier operated at the designed switching frequency was obtained already...
This paper presents a new single-stage singleswitch (S4) high power factor correction (PFC) AC/DC converter suitable for low power applications (< 150 W) with a universal input voltage range (90-265 Vrms). The proposed topology integrates a buck-boost input current shaper followed by a buck and a buck-boost converter, respectively. As a result, the proposed converter can operate with larger duty...
This paper presents an implementation of controlled rectifier with power factor correction (PFC) using single-phase matrix converter (SPMC). A current control loop (CCL) using standard proportional integral control was used to implement PFC to correct the pulsating nature of the input current to almost unity power factor form with low total harmonic distortion (THD) level well below the acceptable...
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