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In more electric aircraft (MEA), three phase PFC rectifiers of several kilowatts are required. In this paper, analysis and design of a single stage three phase PFC interleaved half controlled boost converter for aircraft application is presented. The proposed converter uses the voltage follower approach i.e it is operated in Discontinuous Conduction Mode (DCM). This avoids the inner current control...
On the basis of summarizing the advantages and disadvantages of present phase-modular three-phase power factor correction (PFC) converters, this paper proposes the phase-modular three-phase isolated bridgeless Sepic and Cuk PFC converter. The proposed converters are implemented by star connection of single-phase isolated bridgeless Sepic and Cuk PFC converter. The proposed converters not only can...
In this paper, we propose new isolated AC-DC converters which have only one conversion stage; in addition it can operate zero voltage switching in all switching devices. Moreover, we propose control strategy for these converters, and also confirmed it by experimentation or simulation using 100W prototype.
Conventional diode bridge rectifiers have poor input power quality due to high harmonic content in input current which leads to low power factor and high total harmonic distortion (THD). In order to extract maximum power from the supply it is advantageous to operate a rectifier at unity power factor with minimal harmonics. Therefore, UPF pre-regulators are used in modern rectifiers. When realizing...
A bridgeless Power Factor Correction (PFC) circuit based on Cuk converter is proposed in this paper. The operation during each sub-interval modes of the converter operated in Discontinuous Conduction Mode (DCM) is discussed. The small-signal and large signal models are presented using Current Injected Equivalent Circuit Approach (CIECA). PLECS/Simulink is used to verify the capability of the proposed...
This paper presents the modeling and control of a single-stage isolated current rectifier with power factor correction based on full-bridge and flyback topologies. The state-space averaged model of the converter for step-down and step-up operation modes is presented, as well as the design and analysis of the digital control system. Experimental results based on a 3.5 kW prototype are presented to...
This paper proposes a push-pull forward (PPF) three-level (TL) converter, which is suitable for low and wide-range input voltage applications, such as fuel cell power system. Half of the switches sustain half of the input voltage, and the others sustain one and one-half input voltage. Input ripple current and output filter inductor ripple current can be reduced with the TL waveform of the secondary...
In this paper, a new unity power factor isolated three-phase buck rectifier is presented. Based on the Scott transformer, this rectifier is simple and it has the capability to obtain low output voltage. Besides, it protects against short circuit and it needs no auxiliary circuit for inrush current. Using only two active switches, it is able to generate symmetrical currents in the line and output voltage...
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