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In this paper, a novel LLC resonant converter with parallel input and parallel output circuit topology is proposed to achieve the good performance of reduced switch count and medium power compared with conventional parallel half-bridge resonant converter. The proposed LLC resonant converter has two resonant circuits, two resonant circuits use the same power switches to transmit power so that the switch...
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...
Output voltage of renewable energy resources, such as fuel and solar cells, varies widely with load and environmental condition, so a DC-DC converter should be suitable for wide input-voltage range application and be with low input ripple current. An integrated boost three-phase half-bridge converter is proposed. The boost and three-phase half-bridge converters are integrated to reduce number of switches...
This paper proposes the class-E rectifier with harmonic-current injection. For injecting the harmonic current, a harmonic-component resonant circuit is added to the class-E rectifier. By injecting the harmonic current with proper amplitude and phase, the peak value of the diode voltage and current can be reduced effectively. This paper shows the design example along with the experimental results....
A novel hybrid resonant zero-voltage zero-current switching PWM full-bridge converter with capacitive output filter is proposed in this paper. The hybrid resonant converter, with two full-bridge cells sharing a bridge leg and connecting the secondary windings of two transformers in series, operates in discontinuous current mode and can achieve zero-current switching for main power switches and rectifier...
This work develops a novel single-switch current-fed series-parallel resonant converter for use in direct current (DC) energy conversion systems. The converter comprises a class-E inverter and a series-parallel resonant tank with a bridge rectifier. It uses a single active power switch to reduce the cost of the energy conversion system and control circuits. With a simple circuit configuration and...
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...
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...
To reduce the conduction loss, a novel three-phase current source rectifier, named Delta-type Current Source Rectifier (DCSR), has been proposed in previous research. This rectifier has delta-type connection on its input side, and its dc-link current can be shared by multiple devices at a time to reduce up to 20% conduction loss. A high-efficiency modulation scheme for DCSR has been proposed, where...
In this paper, a bridgeless PFC converter in which two diodes in the rectifier-bridge are replaced by two switches is proposed, and its operating principles in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are analyzed in detailed. The simulation results verify the theoretical analysis. Compared to other bridgeless PFC converter, the proposed converter has lower voltage...
Time domain technique is used to analyze the LCC converter with capacitive output filter. The converter was operated with frequency control above resonance under heavy load conditions. The analysis is validated with PSPICE simulation and results from an experimental prototype.
A novel bridgeless power factor correction (PFC) converter, pseudo-boost PFC converter, is studied in this paper. Pseudo-boost PFC converter consists of one bidirectional switch, two fast recovery diodes and a resonant branch, without diode rectifier bridge as in conventional boost PFC converter. In addition, zero-current turned-off of fast recovery diodes can be achieved. Operation modes of the converter...
This paper presents an interleaved soft switching converter to achieve ripple current reduction, zero voltage switching (ZVS) turn-on for MOSFETs and zero current switching (ZCS) turn-off for fast recovery diodes. Active snubber circuit is used in the adopted circuit not only to absorb the energy stored in the leakage inductor but also to achieve ZVS turn-on feature for power switches. On the other...
This paper presents a battery charger for LiFePO4 battery pack based on a series-resonant topology. The synchronous rectification technique is incorporated into the proposed system to improve the charging performance. Moreover, the frequency domain analysis and the equivalent circuit of each operation mode are descried and conducted. The frequency characteristics of the proposed system are also detailed...
In this paper a two-stage high frequency AC-LED driver is designed and studied. The front-stage is a boost power-factor correction (PFC) circuit and the rear-stage is a halfbridge series resonant inverter. The lighting characteristics of high frequency AC voltage driving LEDs, and the effect of LED to half-bridge resonant circuit are discussed. The proposed design uses the digital dimming control...
This paper presents a novel application of half-bridge series-parallel resonant converter (HBSPRC) for dc source and secondary battery interface. The converter practically eliminates both low- and high-frequency current ripple on the battery, thus maximizing battery life without penalizing the volume of the charger circuit. Moreover, operation above resonance is preferred because the power switches...
Saber simulation software is one of the most powerful power electronic simulation software in the world. A typical three-phase PWM rectifier is in order to investigate the EMI. In this paper, the lumped equivalent circuit model of DM EMI is analyzed and a simple equivalent circuit is proposed. Through the simulation we can get time-domain analysis, and obtain frequency-domain analysis after FFT. The...
This paper presents single stage series load resonant ZVS-PWM high frequency inverter which operates one diode conduction mode and critical ZCS PFC rectifier for induction heating (IH) applications. This single stage inverter is composed of a single phase PFC rectifier operating at one diode conduction mode and asymmetrical ZVS-PWM high frequency resonant inverter without the interlink bulky electrolytic...
Cost, volume and weight are three major driving forces in the automotive area. This is also true for hybrid electric vehicles, which attract more and more attention due to increasing fuel costs and pollution. Since the energy distribution system causes a significant share of the volume/costs, a new concept for integrating dc-dc converters, which transfer the power between the low- and high-voltage...
As the conventional matrix converter has the drawback of low voltage ratio (max. 0.866), a novel matrix converter called z-source matrix converter is proposed, According to the topology of the different main circuits, they are called z-source indirect matrix converter (ZSIMC) and z-source direct matrix converter (ZSDMC). The basic configuration of the new topology and their fundamental principle are...
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