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To increase the voltage levels and reduce the harmonics feedback to the input source in high voltage high power application, this paper proposed one novel multilevel back to back AC-DC-AC converter. Firstly, the topology about this six level converter is introduced, which realize the neutral clamped points only by switches, and is attractive for its economy. The relationship between the multilevel...
This paper presents an approach of sparse matrix converter (SMC) using Z-source network. The SMC is implemented by connecting a controllable rectifier and the traditional inverter through a Z-source network. The Z-source can produce any desired output voltage by controlling the shoot-through time. Compare to the traditional three-phase SMC, the three-phase Z-source SMC has the same number of switches,...
This paper presents a three-phase voltage doubler rectifier based on three-state switching cells for Uninterruptible Power Supply (UPS) applications using FPGA. Its main features are: high power factor, reduced conduction losses, weight and volume, simple control strategy based on One-cycle Control (OCC), and connection between input and output enabling the use of inverter and bypass. A theoretical...
This paper presents a direct torque control (DTC) applied to a three-phase asynchronous motor supplied by three-phase rectifier with absorption of the sinusoidal current cascaded with a two levels inverter in order to improve certain electrical sizes as the source current, and other mechanical characteristics as the undulations of the torque and the flux's distortion. The speed control is realised...
In modern power electronics a lot of attention is spared properties of straightening of the turned autonomous voltage source inverter. However, a study of power and control properties of current source converter, built on the base of the turned autonomous voltage source inverter is untouched. The three-phase variant of similar converter, structure of his control the system and basic power and regulation...
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