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A novel single phase ac-ac converter with no LC input/output filters is presented in this paper. The proposed converter has all the advantages of the previous single phase impedance source ac-ac converters; it can operate in buck/boost and in-phase/out-of phase with the input voltage, that makes it appropriate for voltage sags/swells compensator without any dc storage. A coupled transformer based...
This paper deals with the simultaneous application of thyristor controlled series capacitor based damping controller and power system stabilizer for stability improvement of dynamic power system. The Colonal selection algorithm is used to develop the control strategy for thyristor controlled series capacitor based damping controller and power system stabilizer. The new approach employs time-domain...
This paper studies the thermal stability of a 6/4 switch reluctance machine under nominal operating condition. Transient finite elements method has been used to calculate the machine copper loss and the core loss in magnetic domain. To calculate the copper loss the precise evaluation of current was needed which has been obtained by applying a voltage sources as the input of the electrical circuit...
This paper describes a new position and speed observer, for BLDCPM1 motor drive sensorless control, based on the line-to-line PM flux linkage estimation. Line-to-line PM flux linkage can be estimated based on measured phase currents and line to line voltage. The zero-crossing of the line-to-line PM flux linkage occurs right in the middle of two commutation points, which is used as a basis for the...
This study presents a novel inverter with high voltage gain based on asymmetrical Γ-Z-source topology. It employs one diode, one inductor and two capacitors more than the basic structure that obtains higher output voltage with reduced duty ratio. So, a reasonable modulation ratio is needed to gain desired boost factor which improves the network power quality. In this structure, unlike other Z-source...
The aim of this paper is to present a simulation model to predict the thermal behavior of transformers with variable inputs for transformer load and ambient temperature. The model equations are established to calculate the top oil and hot spot temperatures. A simulation tool is designed to predict a transformer top oil and hot spot temperature based on the transformer manufacturer data and loading...
This paper proposes the electromagnetic modeling, prototype realization, and test validation of a new quintuple-set switched reluctance motor (QSSRM) for high torque/ripples and high torque/volume applications. The proposed motor consists of five stator/rotor sets. Each set includes a collection of 4/4 stator/rotor poles, which can operate independently. In this machine, the two sets are energized...
In the presented paper a new sensor less method is introduced for driving Switched Reluctance Motor (SRM). The method and the motor are then tested under different unbalanced load conditions. The novel method uses only two algorithms in motor control instead of three algorithms which dramatically decreases the complexity, as a result, the cost of the completed board. In most custom sensor less techniques,...
This paper presents a Fuzzy-Mon te Carlo Simulation (FMCS) approach for reliability evaluation after a discussion about the fuzzy arithmetic and Monte Carlo Simulation (MCS) in systems' modeling. The FMCS method is applied to protective devices and its advantages are expanded.
This paper presents a new method for eccentricity fault diagnosis in switched reluctance motor (SRM). This method makes it possible to determine the eccentricity faulty phase. The proposed signature is based on the analysis of produced currents. It is theoretically shown that the occurrence of the fault level cause an increase in amplitude of the produced current, which can be employed to diagnose...
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