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Transformerless AC voltage regulator with per phase switches which capable to increase of voltage without loss of system current quality is considered. Such a converter can be used as a voltage stabilizer or device for the quality of electricity improving. The results of mathematical modeling and analytical calculation of the rms values by the first currents and voltages harmonics are presented.
Traditional AC voltage regulators, with a part of the transformer, working frequency is-power source, which consequently heavier system. To improve the mass-dimensional indicators, used transformers operating at a frequency much-stalks It exceeds the power supply frequency. This article provides an overview of the AC voltage regulator, containing in its structure of high frequency link (high frequency...
Is investigated two-zone thyristor AC voltage regulator with capacitor divider. Analytical calculation of currents and voltages first harmonic effective values of singlephase thyristor AC voltage regulator is shown. Waveforms of output voltage and current obtained as a result of the experiment with the two-zone thyristor regulator model are offered.
The new family of AC voltage regulators based on the switching quasi-impedance of power supply or load is offered. Such AC-AC converters are intended for construction of conditioners of voltage quality, regulators of a soft start of induction motors, compensators of a reactive power, active filters of harmonics, devices of balancing of three-phase circuits, compensators of voltage sags in electric...
The digital control system of three-phase two-zone thyristor AC voltage regulator is considered and analyzed. This system has been assembled on the base of microcontroller Atmel AVR Atmega128A. The system of automatic control and protection system of current to prevent the regulator from the transition to emergency mode is proposed. The results of developing control system model are presented.
A new transformerless AC voltage regulators with a sinusoidal input and output currents and ability of voltage increasing are considered. The regulators can be used as the soft-starting devices for asynchronous motors. Results of mathematical modeling and analytical calculation of RMS values by fundamentals of the currents and voltage are given.
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