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This paper presents unity, lagging and leading power factor operations, with near sinusoidal line currents, of the bi-directional buck type improved power quality AC-DC converter (IPQC) that employs power MOSFET embedded two-quadrant switches (2QSWs). The topology of the IPQC itself is capable of providing variable bi-directional DC link voltage and non-reversible current i.e. two quadrant operation,...
This paper presents unity, lagging and leading power factor operations, with near sinusoidal line currents, of the bi-directional buck-boost type improved power quality AC-DC converter (IPQC) that employs power MOSFET embedded four-quadrant switches (4QSWs). The topology of the IPQC itself ensures variable bi-directional DC voltage and reversible current in both buck and boost modes, however, application...
This paper presents the lagging and leading power factor operations, with near sinusoidal line currents, of the bidirectional buck-boost type improved power quality (IPQC) ac-dc converter that employs power MOSFET embedded four quadrant switches (4QSWs). The topology of the IPQC itself ensures variable bi-directional dc voltage and reversible current in both buck and boost modes, however, application...
This paper presents the application of hysteresis current control to the bi-directional buck-boost type improved power quality (IPQC) ac-dc converter that employs power MOSFET based four quadrant switches (4QSWs). The converter, capable of buck and boost modes of operation, outputs variable bidirectional dc voltage and reversible current in both modes. The control strategy is evaluated for the bi-directional...
A single-phase bi-directional A.C. power control circuit using power MOSFET embedded discrete component four quadrant switch (4QSW) realizations that operate in a high-frequency chopping mode is presented. In this time-ratio controller the symmetrical multipulse modulation (SMM) technique is adopted, wherein, several equidistant pulses per half cycle (M) are used. Microprocessor based gate drive circuits...
A three-phase pulse width modulated AC/AC voltage converter using power MOSFETs that operate in a high-frequency chopping mode is proposed. The symmetrical multipulse modulation strategy (SMM), wherein several equidistant pulses per half cycle (M), are used, is adopted. The resulting harmonic output voltages are analyzed and compared with those of phase control. The analysis reveals that substantial...
This paper presents single and three phase topologies, employing power MOSFETs, of the bi-directional multilevel improved power quality AC-DC converter (IPQC) and explores the possibility of their use in high frequency applications using simulation software. The simulations are conducted for a fundamental frequency of 50 kHz. The current-forced control (CFC) strategy based waveshaping of line currents,...
This paper presents single and three phase topologies, employing power MOSFET based four quadrant switches (4QSWs), of the bi-directional buck-boost type improved power quality AC-DC converter which outputs variable bi-directional DC voltage and reversible current. The converter topologies are simulated for bi-directional buck and boost modes at 50 Hz and 5 KHz AC supply frequencies. The simulations,...
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