نتایج جستجو برای: electric rectifier
تعداد نتایج: 150823 فیلتر نتایج به سال:
High voltage direct current (HVDC) transmission systems have become popular, mainly within the scope of More Electric Aircraft (MEA), where converters with high power density and robustness are required. In this context, article presents a proposal Rectifier Unit (RU) based on Three-Phase Hybrid for MEA, which is denominated as TPHR-HVDC-MEA. The architecture RU Diode Bridge (DBRU) three-phase ...
To increase the power rating and reduce cost complexity of a multi-pulse rectifier (MPR), it is well known that pulse number must be increased. In some practical cases, 12-pulse (12PR) suggested as good solution considering its relatively simple structure low weight. However, rectifiers cannot technically meet standards harmonic distortion requirements for industrial applications, therefore the...
Three-phase induction motors are widely used in electric traction systems. Impacts of the traction vehicle equipped by three-phase induction motors on power quality are much different from the impacts of vehicles with DC traction motors. In this paper, the effects of the traction vehicle operation with threephase induction motors on power quality in 110 kV transmission network are investigated....
The capabilities to tune the conduction properties of materials by doping or electric fields are essential for the design of electronic devices. However, in two-dimensional materials substitutional doping has been achieved in only a few systems, such as Nb substitutional doping in MoS2. Surface charge transfer is still one of the popular ways to control whether the conduction is dominated by ho...
There has been recently considerable interest in the use of matrix converters as a good alternative to the rectifier/PWM-inverter combination, particularly in electric drive applications. However, the reliable current commutation for switches in a matrix converter is a difficult task and may adversely affect the quality of output waveforms. In this paper, different current commutation strategie...
The increase in the number of pulses in multipulse rectifiers leads to a reduction in harmonic current distortion. But this increase in the number of pulses leads to an increase in kVA, cost, and complexity of the multi-pulse rectifiers. As a result, in industrial applications, 12-pulse rectifiers are mainly used due to their lightweight, simple transformers, and low kVA rate, and low cost. The...
A study of the fundamental of operation of a three-phase AC-DC power converter that uses Zero-Voltage Transition (ZVT) together with Space Vector Pulse Width Modulation (SVPWM) is presented. The converter is basically an active rectifier divided into two converters: a matrix converter and an H bridge, which transfer energy through a high-frequency transformer, resulting in a modular AC-DC wirel...
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