The aim of this paper is to analyze the potential of switched reluctance generator SRG in wind energy application. The machine comprises of switched reluctance generator, power converter and … Expand. Switched reluctance drives: a comparative evaluation.
Highly Influential. View 5 excerpts, references background and methods. New ZCS resonant power converter topologies for variable reluctance machine drives. Zero current switching ZCS converter topologies for variable reluctance machine drives are described. ZCS makes high frequency operation possible while maintaining low switching loss and reduced … Expand.
View 1 excerpt, references background. New series resonant converter for variable reluctance motor drive. PESC '92 Record. A resonant-type converter for a variable-reluctance motor drive is proposed to perform zero current switching of all solid state devices. The resonant circuit is partially resonant rather than fully … Expand. Circuit-oriented model of the switched reluctance motor for drive systems simulation.
IECON Analysis and design of a low cost converter for switched reluctance motor drives. The analysis and design of a low-cost, one-switch-per-phase converter topology suitable for low-performance applications in switched reluctance motor SRM drives is presented.
The converter has the … Expand. A modified C-dump converter for variable reluctance machines. A type of converter for variable reluctance machine VRM drives is described. In this converter topology the energy extracted from an offgoing phase is stored in a dump capacitor. The energy stored … Expand. View 1 excerpt, references methods. A choppingless converter for switched reluctance motor with unity power factor and sinusoidal input current.
This paper describes a new converter topology for switched reluctance motor drives. The new topology consists of a pair of boost-buck power converters and a machine converter. The boost converter … Expand. View 2 excerpts, references background. A new hybrid C-dump and buck-fronted converter for switched reluctance motors. IEEE Trans. The finite element analysis of switched reluctance motor considering asymmetric bridge converter and DC link voltage ripple.
This paper presents a characteristic analysis of switched reluctance motor SRM considering hard chopping and dc link voltage ripple by using time-stepped voltage source finite element method in … Expand. Second, the power delivered from the module s is module, which also lower the possibilities of hot spots. This V for a module made up of 36 cells or from 38 V to 46 V for a is of great importance, because an overheated cell rapidly module composed by 72 cells [2].
However, new technologies decreases the modules lifetime. This means B. String-inverters use a overview. From the past, when large areas of several PV- single string of modules, to obtain a high input voltage of the modules were interfaced to a centralized inverter, into the inverter. However, the high DC voltage requires unexamined present time, where decentralized inverters are interfacing a electrician to perform the interconnections between the single or few modules and further into the future where inverter modules and the inverter.
On the other hand, there are nooses only interfaces a single PV-cell to the grid. Yet, the risk of a hot-spot inside the Next, an overview of existing power converter topologies string still remains. After multilevel inverter topology integrated part of the PV-module, is also an interesting solution discussed. The approaches are further discussed in order to [5]. It removes the losses due to mismatch between modules and compare the topologies for future applications and finally a inverter, as well as it supports optimal adjustment between the conclusion is given.
Moreover, the hot-spot risk is removed. All this together; a better efficiency may be achieved. It also includes the possibility of an easy enlarging of the to the grid, of 1. Another disadvantage is that both the system, due to the modular structure.
A solution for the future could be the AC-Cell, which is the integration of one great PV-cell and the inverter [5]. The aim of these cells is to be an integrated part of the climatic-barrier in buildings. For the same reason entirely new converter technologies are requested. In this paper multilevel inverter topology is discussed. The conversion of the low voltage generated at the MPP typically around 17 V for a 36 cells module and 34 V for a 72 cells module to a corresponding AC current Fig.
Grid connected inverters: a Current-fed, grid-commutated inverter injected into the grid, must be done with the highest possible switching at twice the grid frequency. This requirement is given due to the irradiation distribution of the sun, which is The transformer-included inverters may either utilize a shown in Fig. Another drawback is the solutions uses a full-bridge inverter towards the grid, either prize, while these transformers must be made and mounted manually.
Modern inverters tend to use a high- frequency rid-commutated at twice the grid-frequency [8]—[9] of. This results in entire new designs, such as the 2a , or self-commutated with a high switching frequency [6].
Printed Circuit Board PCB integrated magnetic components, The grid commutated operation is possible if the input-current even in a core-less version. The latter utilizes PWM or bang-bang their task V [7], that a general requirement for transformer- operation Benefits for the grid-commutated solution are that included topologies is not justified, because small amount of the switching losses from the stage are completely removed injected DC current to the grid do not affect the local and only the conduction losses remain.
This means that the distribution transformers. The inverter must also include a grid current must be sine-modulated in another sense, e. Finally, the inverter must be low-cost but simultaneously it converter. This calls for the use of between the module and the grid for the dual stage more silicon devices, e. The fluctuation comes from the magnetic devices. All in one single inverter. Again, for a European system, with an average DC- almost 16 times for European grids.
The converter is in used to drive a piezo-ceramic actuator with an operating frequency ranging from zero to Hz note that the switching Fig. Typical current and power characteristic for a PV-cell or -module.
Uin is the module voltage and Uout is the voltage together with a bulky 50 Hz transformer [3]. However, this is across the grid and the grid-connected inductor. The converter regarded as a poor solution due to the bulky low-frequency can always be controlled to operate in Continuous Conduction transformer and the lack of power decoupling between the Mode CCM because of the bi-directional current flow module and the grid. The penetration of the Hz power ripple may be rather VI. Due to the three stages or more the complexness and cost A remedy for removing the ripple is to use an input capacitor, of the multi-step topology are deemed to be higher than those of.
C is the required capacitor in the front of the module in one- and two-step solutions presented previous. This results in low switching losses in the grid-connected stage and good MPPT properties. This inverter is radically different than these just presented. For the For instance, a MPP voltage of The second compared to the dual- or multiple-step solution, where the stage is a series resonant converter with a high-frequency required DC-link capacitance equals: transformer and rectifier.
The boost converter is used for which is included in the leakage inductance of the transformer. The module and the grid constant frequency, i. The become in this way power-decoupled. The auxiliary winding on module-connected converter is based on the buck converter, the boost inductor is used for the Auxiliary Power Supply Unit where the output current is modulated to follow the well-known APSU rectified sine-current.
The amplitude of the rectified sinusoidal current is controlled by the MPPT. This is a fast and simple way to perform the MPPT as long as the modules characteristic is known. If they are changed due to a change in e. The proposed topology for grid-connected inverter unfolds the accurately, with reduced power as a consequence. The next inverter presented is found in [10] and depicted in Fig. A boost converter is used to amplify the module voltage The efficiency for the boost converter is measured to up to approximately V in the DC-link and to track the MPP.
The efficiency for Moreover, it is used to supply the auxiliary circuits. A push-pull converter provides galvanic diode forward-voltage drop and the absolute average grid- isolation between the module and the grid.
Besides this, it current is generating the losses. The low order to stabilize the module voltage around the UMPP. The efficiency is mainly due to the boost converter.
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