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This paper proposes the high-voltage high-frequency power supply for an ozone generator using a phase-shift pulse width modulation (PWM) full bridge inverter with constant applied electrode voltage. The circuit operation is fully described. The high-frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents....
The purpose of this paper is to investigate and implement a novel approach to learning control for permanent magnet synchronous motor (PMSM) drive system using a hybrid recurrent fuzzy neural network (HRFNN) control. First, the field-oriented mechanism is applied to formulate the dynamic equation of the PMSM servo drive. Then, a HRFNN speed control system that combined supervisor control, RFNN and...
This paper deals with a new PWM control scheme of matrix converters, which have been proposed by the authors. The PWM control scheme is characterized by the calculation algorithm using pseudo inverse and the performance that the output voltage can be controlled completely even if the input voltage is distorted. An experimental system, which consists of a matrix converter main circuit and a control...
This paper proposes one novel sliding mode controller for the Half-bridge converter to reduce the line and load disturbance. Based on the bilinear model of the Half-bridge DC/DC converter, the small signal model and the design consideration of the sliding mode controller for this converter are deduced and presented. The controller is simply implemented in the analog controller board. The validation...
This paper presents a new simplification of Space Vector Pulse Width Modulation (SV-PWM) for two-level three-phase inverters. The look-up tables with formulas about switching times and states were replaced by simple arithmetic and boolean equations. The explicit identification of the sector where the reference space vector is located was also eliminated. This paper proposes the rotation of reference...
A current control method for the utility interactive inverter based on multi-rate deadbeat control method with FPGA based hardware controller is verified for 100 kHz carrier PWM inverter. As the distributed power systems spread, the requirement of the control accuracy for the utility interactive inverter becomes more precise. Deadbeat control is one method to ensure the output voltage or current matches...
Methods to detect DC bus current in order to reconstruct three-phase currents have a well-known problem of short DC pulse duration. To expand the pulse duration, several pulse width modulation (PWM) modification techniques have been proposed. The "Half Pulse Shift (HPS) method is very promising because it has both robustness against detection errors that occur due to current ripple and low acoustic...
A novel current driven method for center-tapped synchronous rectifier (SR) is proposed in this paper. Compared with the previous current driven synchronous rectifier (CDSR), two SRs can be driven with only one current transformer by using the proposed CDSR. The new CDSR has the advantages such as simple structure, low power loss and good performance and so on. The performance of the proposed circuit...
This paper presents dynamic voltage restorers (DVRs) which are employing a PWM ac-ac converter. The shunt-series and series-shunt configurations are shown along with the operating principles when using the basic PWM ac-ac converter topologies such as buck, boot and buck-boost converters. The steady state analysis is carried out for an example case, the DVR with buck ac-ac converter. Also, this paper...
This paper propose a new current control system for IPMSM to reduce harmonic currents caused by the overmoduration and a non-sinusoidal magnetic flux distribution on the rotor. The harmonic currents have problems with making a current control system of IPMSMs unstable easily. The proposed current control system has two current controllers. One of them controls fundamental current to satisfy the required...
A new magnetic-flux saturation model has been developed for permanent magnet synchronous motors. In the new model, simple first-order functions Φd(id, iq) and Φq(id, iq) express the relationships between d-q axis currents and each axis magnetic flux, considering magnetic saturation and cross-coupling effects. Taking advantage of these new features, we developed a current controller that introduced...
A new control method based on State-Dependent Ricatti Equation (SDRE) control for single phase PWM inverter with FPGA based hardware controller is proposed. In the deadbeat control approach, robustness for the variation of the system parameter is the key issue. Some approaches were proposed, for example, a single-rate deadbeat control with disturbance observer, a multi-rate deadbeat control, and so...
A new generation of DC to AC inverters which is called Multilevel Inverter, has many industrial applications, especially in high-voltage and high-power. In spite of nearly sinusoidal waveform, multilevel inverters produce noticeable harmonic content. THD is normally used as a benchmark to evaluate harmonic contents. THD is one of important factors to produce losses in devices such as induction motors,...
A transformerless high step-up DC-DC converter is investigated in this paper. Two buck-boost converters are integrated with single switch. The input voltage of the front semi-stage is the DC source. The input voltage of the rear semi-stage is the series of the DC source and the output voltage of the front semi-stage. Moreover, the output voltage of the proposed converter is the output voltages of...
A current controlled driver for a Dielectric Barrier Discharge (DBD) lamp is proposed in this paper as opposed to most of the published drivers which are voltage controlled drivers. The design of this driver is intended to enhance the electrical to optical efficiency of the lamp and therefore enhancing the overall efficiency of the system. The driver topology permits direct control of the peak lamp...
An alternative approach to develop a large signal time dependent model of a simple electrochemical capacitor is proposed. A simple planar electrochemical cell consisting of two metal electrodes separated by a sulfuric acid electrolyte layer is modeled from first principles. The model is a large signal time dependent model and is valid under constant temperature conditions. The model is based on the...
The objective of the discrete-time modeling tools is twofold. First, they give an insight into the basic ideas of discrete-time modeling of dc-dc converters for university students and interested power electronics specialists. Second, as it is being presented below, the interactive calculation tools facilitate the fast and simple model development in WEB browser after entering the basic circuit and...
Nowadays, hybrid cascade multilevel technology has attracted a increasing concern, especially in moderate-voltage and high-power applications. In this paper, a design method about how to design main circuits of active power filters(APF) with hybrid cascade multilevel structure is proposed. Through careful research, the combination of these cascade multilevel H-bridge modules is properly chosen and...
We discuss multi-domain simulation of power electronic systems where non-linear capacitors have a significant impact on the system behaviour, e.g. employing the MOSFET output capacitor Coss for soft switching or employing nonlinear thermal models in coupled electrical-thermal simulations. It is shown which errors can result from approximating non-linear capacitors with simple linear ones as proposed...
This paper presents asymmetric circuit models and inductance parameter measurement method for Permanent Magnet Linear Synchronous Motor (PMLSM). Asymmetric circuit models considering the saliency and inductance harmonic effects are discussed for PMLSM. All fundamental and harmonic inductance parameters are easily determined by a standstill test using a single-phase commercial source. Experimental...
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