Search query: A new three phase AC to DC rectifier with active power factor correction

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abstract: A new three phase AC to DC rectifier system with near unity input power factor and reduced input current harmonics is proposed, The proposed approach employs three SCRs and three active semiconductor switches with anti parallel diodes to form a three phase bridge. In the proposed approach only two semiconductor device drops are encountered in the power flow path. Also the DC link inductor is unnecessary and three AC side inductors are used instead. It is shown that discontinuous input current is the preferred mode of operation to realize high quality input current. A suitable control strategy is proposed in order to minimize the input current THD. Further, a zero voltage switching strategy is implemented to minimize the switching losses. The SCRs are suitably phase controlled to limit inrush currents during starting and to provide current limiting action under overload or output short circuit conditions. During normal operation the SCRs are gated to function as diodes. A design procedure for the proposed approach to achieve near sinusoidal input currents and zero voltage switching is detailed. Simulation and experimental results on a laboratory prototype system are discussed.<ETX>
author_names: Prasad N Enjeti
title: A new three phase AC to DC rectifier with active power factor correction
venue: Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition ASPEC'94
year: 1994

abstract: Conventional single phase power factor correction (PFC) rectifiers with active power decoupling capability typically require more than three active switches in their circuits. By exploring the concept of power buffer cell, a new single stage PFC rectifier with two active switches, one inductor and one small power buffering capacitor is reported in this paper. The proposed converter can achieve high power factor, wide output voltage range, and power decoupling function without using electrolytic capacitor. Additionally, an automatic power decoupling control scheme that is simple and easy to implement is proposed in this paper. The operating principle, control method, and design considerations of the proposed rectifier are also provided. A 100 W prototype with ac input voltage of 110 Vrms and a regulated dc output voltage ranging from 30 to 100 V has been successfully designed and practically tested. The experimental results show that with only a 15 mF power buffering film capacitor, the proposed converter can achieve an input power factor of over 0.98, peak efficiency of 93.9% and output voltage ripple of less than 3% at 100 W output power.
author_names: Sinan Li

Wenlong Qi

Siew-Chong Tan

Shu Yuen Ron Hui
title: A Single Stage Two Switch PFC Rectifier With Wide Output Voltage Range and Automatic AC Ripple Power Decoupling
venue: IEEE Transactions on Power Electronics
year: 2017

abstract: In this paper, a novel prototype of a zero voltage soft switching PWM three phase AC/DC active power converter with a new transformer assisted quasi resonant tank DC link (TQRDCL) is presented for power factor correction, sinewave line current shaping and constant output DC voltage regulation. The instantaneous space voltage modulated sinewave line current synthesizing scheme of this high power factor active rectifier with an instantaneous output DC power feedback loop is implemented by digital signal processor based software and its related hardware. The simulation results of this soft switched active rectifier are illustrated and discussed as compared with the other resonant DC link rectifiers and hard switched active rectifier.
author_names: Hideto Yonemori

Hiroya Fukuda

Mutsuo Nakaoka
title: Advanced three phase ZVS PWM active power rectifier with new resonant DC link and its digital control scheme
year: 1994

abstract: This paper describes a new method to select the optimum sinewave PWM patterns of a large capacity current source fed active PWM AC/DC converter and a practical procedure to design its input AC side low pass filter which is used to suppress higher harmonics flowing Into the utility grid power source. A feasible test is carried out using a 500 kVA active PWM converter which is designed and operated for unique considerations mentioned above. It Is verified that these new considerations are more effective to minimize higher harmonic current components flowing into the utility grid AC line. Furthermore, this experimental work provides highly efficient AC/DC converter characteristics under a unity power factor correction and sinewave line current shaping schemes.
author_names: Yoshihiro Konishi

Yutaka Matsumoto

Prasanna B Boyagoda

Mutsuo Nakaoka
title: Current fed three phase rectifier with optimum PWM based sinewave line current shaping and unity power factor correction schemes
venue: Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)
year: 1997

abstract: The conventional three phase rectifier with bulky LC output filter has been widely used in the industry because of its distinctive advantages over the active power factor correction rectifier such as simple circuit, high reliability and low cost. Over 0.9 power factor can be achieved, which is acceptable in most industry applications. This rectifier, however, is not easy to use for high power density applications since the LC filter is bulky and heavy. To solve this problem, a new simple rectifier is presented in this paper. By eliminating the bulky LC filter from the conventional diode rectifier without losing most of the advantages of the conventional rectifier, very high power density power conversion with high power factor can be achieved. Its operating principle and design considerations are illustrated and verified by PSpice simulation and experimental results from a prototype of 3.3 kW rectifier followed by 100 kHz zero voltage switching full bridge PWM power converter.
author_names: J G Cho

Chang-Yong Jeong

Juwon Baek

D I Song

Dong-Wook Yoo

Chung-Yuen Won
title: High power factor three phase rectifier for high power density AC/DC conversion applications
venue: APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)
year: 1999

abstract: A new application of power and voltage balance control schemes for cascaded H Bridge Multilevel Inverter (CHMI) based Solid State Transformer (SST) topology with fuzzy controller is proposed in this paper. The SST consists of a cascaded multilevel ac/dc rectifier, dual active bridge (DAB) converters with high frequency transformers. The solid state transformer (SST) has the features of immediate voltage regulation, voltage sag compensation, fault isolation, power factor correction, harmonic isolation and dc output. Here we are using the fuzzy controller compared to other controllers i.e. The fuzzy controller is the most suitable for the human decision making mechanism, providing the operation of an electronic system with decisions of experts. To reduce load on the controller and simplify modulation algorithm, a masterslave control (MSC) strategy is designed for the dual active bridge (DAB) stage. This paper presents a compensation strategy based on three phase d q decoupled current controller. The fuzzy controller for a nonlinear system allows for a reduction of uncertain effects in the system control and improve the efficiency. The proposed control method the three phase grid currents and dc link voltage in each module can be simultaneously balanced. By using the simulation results we can analyze that the proposed method and also the performance of the controller and its application to microgrid SST.
author_names: Lalit Kumar

S Sunil Naik
title: A NOVEL THREE PHASE SOLID STATE TRANSFORMER WITH FUZZY CONTROL OF MULTILEVEL CASCADED H BRIDGE INVERTERS
year: 2017

abstract: A new combination of a 'unity power factor three phase rectifier stage' with a quasi resonant SEPIC converter, provides high quality input currents of a transformer isolated three phase AC DC converter. Analysis of the converter, including analysis of the three phase input current waveforms, has been performed and a design procedure developed. Results of a transformer isolated 1.0 kW/35 kHz prototype converter, utilising a single 1200 V IGBT as the active switching device and operating direct off line from a 415 V three phase mains supply, are presented to verify theoretical predictions. The measured input current waveforms, drawn from the three phase supply, approach unity power factor with little harmonic content.
author_names: Johannes Pforr

Leslie Hobson
title: Power factor correction using quasi resonant SEPIC converter with three phase input
year: 1992

abstract: The authors present the state of the art pulse density modulation (PDM) type three phase AC/DC power converter with an active voltage clamped resonant DC link (ACRDCL) network and its digital signal processor (DSP) based digital control strategy to achieve a unity power factor correction and sinewave line current shaping. The new operating principle of the zero voltage soft switched three phase AC/DC converter with a ACRDCL and its instantaneous space voltage vector based clamping voltage distributed PDM (modified PDM) strategy to improve its controllability and operating characteristics are described. Performance evaluations of this modified PDM converter are discussed using simulation results as compared with the conventional PDM converter. Experimental results for this switch mode rectifier are shown.<ETX>
author_names: Kouichi Miyagawa

Mutsuo Nakaoka

Yasumasa Ogino

Yoshishige Murakami

K Hayashi
title: Space vector controlled soft switching three phase PDM AC/DC converter with unity power factor and sinusoidal line current
venue: Proceedings of the 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation
year: 1992

abstract: This paper proposes a single phase 3.3 kW onboard battery charger for E Rickshaw with a Single stage Active Power Factor Correction (PFC) Buck Boost Converter topology. Normally, E Rickshaw battery charger is heavy and bulky in dimensions and comprises of a power factor corrector (PFC) and a DC DC converter. A traditional single phase PFC converter has three sensors namely input voltage, input current, and output voltage for measurement. The proposed converter is more compact and more flexible in terms of control and conversion stages a with new Unity Power Factor alongside a combination of a full bridge diode rectifier and a single switch Buck Boost converter by just using one output voltage sensor is presented. The suggested control technique uses only one integrator to compensate for the steady state error and is very simple to implement. The proposed battery charger accomplish Unity Power Factor at variable AC input with a small inductance. To verify the feasibility of the proposed scheme, the proposed battery charger topology is simulated in PSIM. The simulation result indicates a 95% peak efficiency at 220Vac and 93% at a variable input voltage from 170V 280V at 3.3kW. A scaled down lab prototype of 1.5kW is built and experimental results are presented to verify the suitability of the proposed converter.
author_names: Abhinandan Dixit

Karan Pande

Akshay Kumar Rathore

Rajeev Kumar Singh

Santanu Kumar Mishra
title: Design Development of On Board DC Fast Chargers for E Rickshaw
venue: 2019 IEEE Transportation Electrification Conference (ITEC India)
year: 2019

abstract: In this paper, a novel prototype of zero voltage soft switching PWM three phase AC/DC active power converter with a new transformer assisted resonant tank DC link is presented for power factor correction, sinewave line current shaping and output DC voltage regulation. The instantaneous space voltage modulated sinewave current synthesizing scheme of this active rectifier with an instantaneous output DC power feedback loop is implemented by digital signal processor based software and its related hardware. The simulation results of this soft switched active rectifier are illustrated and discussed as compared with the other resonant DC link rectifiers and the hard switched active rectifier.<ETX>
author_names: Katsutosi Yurugi

Hideto Yonemori

Kenji Hayasi

Mutsuo Nakaoka
title: Next generation space voltage vector ZVT PWM AC DC active power converter with auxiliary transformer assisted resonant DC link
venue: Proceedings of 1994 Power Electronics Specialist Conference PESC'94
year: 1994