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Analysis, design and implementation of a full brid
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Application background Modern arc welding machines utilize controllable high frequency DC/DC power
supply with high dynamic and steady state current regulation performance. In the
design robustness, small size and low weight, low complexity, and high efficiency
are the defining criteria. The most suitable approach for a 5 kW arc welding machine
power supply application is the high frequency Full-Bridge Phase-Shifted Zero
Voltage Switching (FB-PS-ZVS) DC/DC converter with an isolation transformer.
This converter not only gives the advantage of zero voltage switching for a wide load
current range, it also provides reduced Electromagnetic Interference (EMI) and
reduced component stress compared to standard PWM converters. In this thesis a
FB-PS-ZVS DC/DC converter with 5 kW power rating is designed for modern arc
welding machine applications. IGBTs are utilized at 50 kHz switching frequency for
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Application of take-back-half algorithm
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Resource description voltage source converter, security monitoring, multi-functional three-phase power electronic bridge. For the purpose of this document, a system is assumed to contain two independent control loops. An "external" loop is a voltage or application controller. The controller is designed to provide the core functions of the device, such as an active rectifier, inverter, or motor drive. The second "internal" control loop is the current controller. The current controller is a speed control loop designed to regulate the current through each phase of VSC. It receives the command stream from the application controller and controls the electronic switch of the power supply, thus providing the command current.
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The contribution of non symmetrical full bridge sp
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Application background Multilevel inverter (MI) topologies can work at higher voltage and higher power than
conventional two-level converters. In addition, multilevel conversion reduces the output
variables harmonic distortion and, sometimes, in spite of the devices-count increment, the
conversion losses can also decrease by increasing the number of levels. The harmonic
distortion reduction achieved by increasing the number of levels, can be used to further
reducing the switching losses by decreasing the inverter carrier frequencies. To reduce even
more the switching frequency without degrading output spectrum, we control the triangular
carrier waveforms slopes.
First, to achieve this target, two analytical models have been created in order to predict the
inverter output voltage spectrum, depending on diverse parameters: the amplitude modulation
index MA, the voltage distribution K of the inverter
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A distributed energy system for single phase inver
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This paper introduces the design of small and medium-sized multilevel D-STATCOM inverter (10 – 20 kW) permanent magnet wind or solar power device. The proposed inverter can provide active regulation of reactive power in a programmable output while providing variable output power to the individual feeder of renewable energy. The goal is to provide utility and distribution control for reactive power compensation and power factor correction feeder lines. The converter adopts the topology of 5 hybrid clamp multilevel voltage source converter and adopts the optimized harmonic elimination technology. The topology allows the separation of active and reactive power control and the ability to operate under any load condition. The reactive power is controlled by the modulation index and the phase angle controlled by the active power. Simulation and verification of the proposed inverter are carried out using matlabgsimulink and SimPowerSystems toolbox.
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