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In this paper the site survey is done for four sites in Pune India. The electrical power is predicted for each site for different tower heights of the wind turbine. Different lengths of blades of turbine are also considered for power prediction. This method involves site survey using anemometers. This method involves low cost and less manpower.
A single-stage LED driver with high frequency pulse is presented in this thesis. The proposed circuit integrates a boost power-factor-correction converter and a half-bridge resonant inverter into a single-stage LED driver. The boost inductor is operated in discontinuous conduction mode to achieve high power factor and low current harmonic distortion. The half-bridge resonant inverter is connected...
This paper presents a new algorithm, which corrects gain unbalances of current sensors, applied in a conventional two-phase current detection for adjustable speed drive system of IPMSM. The gain unbalance of current sensors is corrected by utilizing the second harmonic components which is extracted by Discrete Fourier Transform (hereafter DFT) from q-axis voltage command. Besides, the correction process...
DC-DC converters for thermoelectric generator (TEG) are generally designed for a unipolar input voltage. However, polarity inversion of TEG occurs when the temperature difference between the sides of TEG is reversed. This paper proposes a power converter which consists of an AC-DC converter and a microcontroller, which adopts polarity inversion of the input voltage. The proposed converter needs less...
It's a difficult work to design large power energy storage asymmetric coupled inductors in interleaving and magnetically integrated bidirectional DC/DC converter. In this paper, the steady current ripple and transient current response speed are analyzed quantitatively in interleaving and magnetically integrated bidirectional DC/DC converter with 3 phase asymmetric coupled inductors under Buck work...
A battery energy storage system based on modular multilevel converter is proposed in this paper, which has many advantages, including easy expansibility, simple structure and high reliability. The system is capable of compensating active and reactive power simultaneously, applied for high capacity and high power situation. The mathematical model of system is built and its circulating current suppressing...
Current source inverter (CSI) is an alternative option to a voltage source inverter (VSI) for grid interfacing of distributed generation (DG) systems. However, literature lacks proper controller tuning procedures for grid-connected CSI that take into consideration the effects of control and sample delays when implemented using a digital signal processors (DSP). This paper presents a step-by-step approach...
Production processes of induction machines suffer from manufacturing tolerances because of assembly imperfections. This causes undesired deviations in the machine's performance and behavior. In particular, the equivalent circuit parameters of the machine are affected. Therefore, the validity of the electrical parameters of a reference machine is doubtful for sample machines. In this work, a sensitivity...
Bi-directional inductive power transfer (BD-IPT) systems are suitable for applications such as V2G where a bi-directional wireless interface between the electric vehicle (EV) and the utility grid has a number of advantages over a wired link. However, physical misalignment between the magnetic couplers of BD-IPT systems used in EVs are unavoidable and introduces variations in self-inductance, leakage...
The prediction technology of the conducted EMI of SMPS is an effective way to reduce the EMI debug period and costs. The traditional prediction technology mainly focused on the self-model of the component and paid little attention to the electromagnetic coupling between the components in SMPS. This paper proposed an optimal prediction method with near-filed electromagnetic coupling parameters in which...
Facing the problem of high-cost, low-efficiency and complicated control of existing isolated led drivers, a high power low cost non-isolated Buck converter with coupled winding and stacked output is proposed. The input current idle time decreases which occurs when the input voltage is lower than part of output voltage, comparing to the conventional Buck's whole output voltage. Therefore, the Buck...
A new harmonic matrix model for three-phase diode-bridge rectifier is proposed in the paper. The relationships between rectifier supply harmonic voltages and its generated harmonic currents can be directly illustrated through the matrix model. Therefore, the model is very suitable to analyze the equivalent harmonic impedance characteristic of the rectifier. Based on the derived equivalent circuits,...
Concurrently, depending on increasing number of vehicles in cities, importance of incentive car-parks on peripheries, parking houses within shopping centres, airports, etc. constantly arises. At the same time, also demands on intelligent control such of these car-parks arise by reason of effective use of every parking spot. The proposed Parking Management Control System (PMCS) provides overview not...
In this paper, an advanced fast-charging strategy for lithium polymer (Li-Po) battery is proposed, in which a two-stage charging current profile is employed. First, the constant charging current is used and when the battery voltage reaches a specified value, the charging current is reduced according to the root square of time. With this strategy, the charging time is shortened and the discharging...
Z-source inverter introduces a unique impedance network between the dc source and inverter bridge. It boosts the input voltage by utilizing shoot-through (ST) states and provides a competitive single-stage approach for DC to AC power conversion. With regard to the unique circuit and operation mode, various modulation schemes including constant boost control, maximum boost control with different ST...
This paper presents a pulse-width modulation (PWM) strategy of a matrix converter for reducing input current harmonics under high-power-factor loads. The behavior of a matrix converter determines by switching pattern during one control period. This paper describes the switching pattern for reducing input current harmonics. The order of connections for one output phase is reversed compared with the...
Parametric array transducers are used for highly directional speaker in an air environments. The power amplifiers for them should have sufficient linear output characteristic to amplify high-frequency ultrasonic waves with low THD, and also have high efficiency to avoid system heating and fuel problems. Piezoelectric micromachined ultrasonic transducers for parametric array transducers need DC-biased...
This paper proposes an improved rotor position estimation method in the stationary reference frame for the sensorless control based on the high frequency rotating voltage signal injection in an Interior Permanent Magnet Synchronous Motor (IPMSM). This method extracts the rotor position related information from voltage and current difference equations and uses the rotating matrix in the stationary...
The paper proposes a new active power conversion system (APCS) applied in microgrid for the connection and flexible power transmission between the main grid and the microgrid and power quality improvement. APCS is composed of three voltage sourced converters (VSCs), ie., main-grid VSC, shunt VSC, and series VSC, which all adopt modular multilevel converter (MMC) topology. The paper analyzes grid-connected...
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