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Matrix converters (MC) can convert variable AC input to desired AC output. While a change occure in power systems i.e. a fault, loss of generation or changes in wind speed, in this study, Matrix Converters can properly improve the behavior of oscillatory system to be more stable. In this study, frequency of system is taken into consideration, frequency measurement is done by proper use of phase locked...
This paper discusses applying various switching strategies such as conventional complementary and proportional methods on a specific converter. This converter was recently presented and it can provide high voltage gain and has current ripple cancelation ability at a preselected duty-cycle. The input current ripple is zero when the converter works at a special duty-cycle. But load disturbance leads...
The major drawbacks of the most battery chargers for plug-in hybrid electric vehicle (PHEV) are high volume and weight, low power, long charging time, deleterious harmonic effects on the electric utility distribution systems and low flexibility and reliability. This paper proposes a new battery charger structure for PHEV application using back to back (B2B) converter in a utility connected micro-grid...
In this paper, a Hybrid Excited Doubly Salient Permanent Magnet (HEDSPM) generator is investigated and optimized. Generator structure is similar to Doubly Salient Permanent Magnet (DSPM) machine which Permanent Magnets (PMs) are located in stator as main excitation. According to requirement of generator for operating at low speeds, its performance should be suitable for direct coupling to the planned...
In this paper, a new structure for non-isolated boost dc-dc converter is proposed by applied voltage-lift (VL) technique. The switching of proposed converter is done by pulse width modulation (PWM) method. Then, the behavior of proposed converter in continues current mode (CCM) is explained and the voltage and current relations of each element are extracted. Also, the voltage gain of proposed converter...
In this paper an LCLL tank is presented for application in Load Resonant Converters (LRCs) with the constant current output. Design method is based on the output current independence from load variation and minimization of kVA/kW ratio of the LC tank. A 150kHz 70W LRC is presented as an experimental prototype of the design procedure. This converter has a robust load regulation, minimum reactive power...
This paper investigates two converter topologies, including neutral-point diode-clamped (NPC) and Vienna converters, to be employed as an interlinking converter in bipolar dc microgrid. Since bipolar dc microgrids are subjected to severe voltage unbalance, the interlinking converters should be able to perform voltage-balancing function at their dc-link capacitors. In addition, they should exchange...
In this paper, the performance of a new hybrid system consists of a new structure boost dc-dc converter, photovoltaic (PV) system, battery bank and bidirectional dc-dc converter is described by introducing new control scheme. Before, the modeling of each parts of proposed hybrid system is explained. Then, the proposed control scheme for proposed hybrid system is defined based on incremental conductance...
A multi-function modified quasi z-source converter as front end converter of switched reluctance machine (SRM) has been presented in this paper. This converter decouples the magnetizing port and demagnetizing port in the asymmetric H-bridge converter of the SRM in order to prevent current overlapping. Asymmetric H-bridge converter in SRM only has the ability to apply zero, positive, and negative amount...
A novel flying capacitor inverter has been proposed that utilizes the transformer in the basic unit. In order to generate all the voltage levels (even and odd) at the output, the magnitude of the capacitor's voltage is controlled. Also a new control strategy to generate maximum output voltage levels is proposed. The proposed control strategy is capable of regulating the voltage of the flying capacitor...
A novel single-phase single-stage transformerless grid-connected current source inverter is proposed for photovoltaic system application. The proposed inverter consists of one inductor, four unidirectional switches and two diodes. The proposed inverter does not suffer from ground leakage current since that the PV panel and the gird utilize common ground. Also, the proposed inverter is capable of connecting...
This paper proposes a straightforward control method for voltage control of a three-phase transformer-based inverter in uninterruptible power supplies or distributed generation systems. The approach offers a dual-loop design consisting inner current control loop and outer voltage loop. Sliding mode current controller provides desired bandwidth for voltage controller which consists of a state feedback...
This paper presents a closed frame for harmonics in space vector modulation technique. Optimization of induction motor parameters using a design inverter seems to be ideal. However, as inverter modulation system is of digital type, machine voltage and current involve many harmonics components. High number of harmonics in voltage and current leads to inability to use an analytical method for harmonics...
This paper presents a model predictive control strategy to control the active and reactive powers for three-phase three-level NPC PWM rectifier directly. This method is based on converter model. It uses voltages and currents of the converter and does not use hysteresis or PI controllers for active and reactive powers control loop. This algorithm is robust against to tolerances of input inductances...
This manuscript introduces an efficient and generalized basic topology adopted for multilevel inverters. It is shown that the proposed structure is in line with significant savings in part counts and control devices. According to the basic topology, a new structure for sub-multilevel inverter is suggested. In continue, cascaded multilevel inverter is realized based on the series connection of n sub-multilevel...
This paper investigates the effect of model inaccuracies on the results of a design by optimization process applied to a SiC switching cell. The technologies used for this DC-DC converter and the requirements are briefly described, as well as the design by optimization process. Then, a sensitivity study is carried out to investigate the most influent models regarding the final design. This allows...
Permanent magnet brushless DC (PMBL) motors are utilized in various applications. Design of PMBL motors mostly depends on experimental knowledge. In this paper an adaptive algorithm is proposed for PMBL motor design. Design equations are derived from basic governing equations which may be applied to a variety of PMBL motors. Based on the equations, an innovative design flowchart is developed. Using...
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