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The power conversion circuit of a three phase Vienna or Modular-Boost switching power factor corrected (PFC) rectifier uses three controlled switches, eighteen diodes and two output split capacitors. Three PFC controller circuits are necessary for conversion circuit's voltage regulation, power factor control and input current waveform improvement. The circuit has been modified to have fewer active...
A new one-switch three phase power factor corrected (PFC) rectifier is presented in this paper. The proposed 3-phase ac-dc converter is based on Ĉuk topology. Proper feedback control of the circuit can maintain high power factor and low input current total harmonic distortion (THD). Use of minimum number of control switch in the proposed power conversion circuit reduces components, drivers drive isolation...
An input switch based modular Single Ended Primary Inductor (SEPIC) three phase AC-DC converter is proposed in this paper. The proposed rectifier has the advantage of step-up/down voltage gain with boost input stage. Input boost stage allows input current shaping accompanied by power factor correction. The topology will also provide possible capacitive isolation of input/output sides of the converter...
A new topology of single-phase SEPIC (Single Ended Primary Inductor Converter) AC-DC converter with low input current THD and high input power factor is proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the rectifier's input is chopped at high frequency during positive and negative cycles by a single...
New output regulated one-switch boost and boost-buck three phase rectifiers are presented in this paper. Proposed three phase ac-dc converters have power factor correction (PFC) and input current shaping facility in one power stage. Use of minimum number of control switch in each proposed circuit reduces conversion circuit components, drivers and drive isolation circuits, sensors and control circuits...
A two bi-directional switch based three-phase boost AC voltage regulator is presented in this paper. The operational principle of the proposed three-phase regulator is a direct consequence of using two three-phase bi-directional switches in the boost converter topology. The topology has reduced number of switches for a three-phase AC voltage regulator having output voltage regulation, input current...
A new three-phase true bidirectional switch is proposed in this paper. This switch consist of a unidirectional switch enclosed in two three phase diode bridges with bidirectional input and output terminals. A family of simple topologies of three-phase AC-AC converters using the true bidirectional switch is possible as direct extension of DC-DC converters having similar operating principle. Steady...
Input current and power factor improvements of single and three-phase rectifiers by switch mode regulators are usually achieved by switching the output of rectifier's diode bridge. In this paper a three phase buck rectifier is proposed which is switched at the input side by one three phase bi-directional switch. The input switching makes input current switched at high frequency, which is then filtered...
Two new topologies of single-phase AC-DC converter using Buck and Buck-Boost conversion with low input current THD and high input power factor are proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the rectifier's input is chopped at high frequency during positive and negative cycles by a single bi-directional...
In this paper, a Ćuk topology based single phase rectifier is proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the rectifier's input is chopped at high frequency during positive and negative cycles by a bi-directional switch in Ćuk conversion mode to get step-up/step-down rectification. The proposed...
Two new schemes of 3 phase AC voltage controller are proposed. The proposed AC voltage controllers are based on Buck switch mode topologies. The proposed AC-AC converters have the advantage of input current shaping that provides low input current total harmonic distortion (THD) and high input power factor compared to the conventional AC voltage controllers. Moreover, only a single control switch is...
A new input-switched single-phase high performance bridgeless AC-DC Zeta converter (Inverse SEPIC) topology is proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the converter's input is chopped at high frequency during positive and negative cycles by a single bidirectional switch to get step-up/step-down...
A new single phase high performance input side switched AC-DC Cuk converter is proposed. A bidirectional switch is formed by a unidirectional semiconductor switch with proper positioning of the bridgeless diodes at the input ac side for power conversion for both positive and negative half cycle. Because of the high frequency input side switching, the power factor of the circuit is inherently corrected...
Input current and power factor improvements of single and three phase rectifiers by switch mode regulators are usually achieved by switching the output of rectifiers. The output switching makes input current high frequency switched, which is then filtered by a small filter to get low THD input current at near unity power factor. In this paper, a three phase cuk rectifier is proposed which is regulated...
A new single phase AC voltage controller based on C´uk topology is proposed. The proposed AC voltage controller has the advantage of input current shaping that provides low input current total harmonic distortion (THD) and high input power factor compared to the conventional AC voltage controllers. Moreover, only a single control switch is necessary for the AC-AC conversion compared to 6 thyristors...
Input current and power factor improvements of single and three-phase rectifiers by switch mode regulators are usually achieved by switching the output of rectifier's diode bridge. In this paper a three phase boost rectifier is proposed which is switched at the input side by one three phase bidirectional switch. The input switching makes input current switched at high frequency, which is then filtered...
We have proposed and simulated recessed Y-gate AlN/GaN/AlGaN DHFET structure with GaN cap layer at drain side of the gate as well as compared its simulated characteristics with the conventional DHFET. The threshold voltage of the proposed device was increased 0.2V to the positive side. Use of GaN cap at the gate side-wall effectively reduced electric field concentration at the gate edge of the proposed...
In this paper, a new three to single phase cycloconverter based on Ĉuk topology is proposed. The circuit will provide the load with adjustable AC voltage and frequency having low input current distortion, high input power factor and maintain high power conversion efficiency. In case of conventional cycloconverters, input power factor is low and input current is distorted. Complex control circuitry...
Two topologies of single phase cycloconverters based on Buck-Boost and Ĉuk topologies are presented. Instead of simple switching scheme of P and N controlled rectifier-converters, high frequency switching of uncontrolled rectifiers outputs have been used with the help of Buck-boost and Ĉuk converters. The input supply is an AC source followed by a full bridge rectifier circuit, the output of which...
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