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A three-phase three-port rectifier (TPTPR), which is capable of handling an AC port, a low voltage DC port and a high voltage DC port simultaneously, is presented in this paper. To directly transfer power from the AC port to the low voltage DC port within single-stage power conversion, a modified SVPWM strategy based on asymmetric three-level vector space is analyzed and evaluated in this paper. With...
This paper introduces a single-phase matrix converter (SPMC) excited rotary transformer system to replace the slip rings of traditional wound field synchronous machine (WFSM). Compared to an inverter excited rotary transformer system, the matrix converter is compact due to the absence of a bulky DC Link capacitor. In this paper, the proposed SPMC uses a new constant volts per Hz modulation method...
An analytical approach for accurate calculation of the conduction and switching power losses associated with the switching devices in the 5-Level 3-Phase Back to Back E-Type Converter (5L3ϕ BTB E-Type Converter) has been proposed in this paper. The 5L3ϕ BTB E-Type Converter is composed by two different multilevel topologies: the 5-Level E-Type Inverter and the 5-Level E-Type Rectifier. The power losses...
The paper presents a new bridgeless buck-boost PFC with the use of the Active Virtual Ground (AVG) technique which is called Manitoba Rectifier. The proposed topology can convert the grid AC voltage to a wide range of voltage output within a single stage circuit. By using the simple structure and the bridgeless technique, an efficient system is able to be guaranteed. In addition, the proposed topology...
Current source converter (CSC) is mainly applied in high medium voltage drives. To increase the system power region and reduce the output harmonics, parallel connection is an easy-implement and practical method. There are mainly two types of parallel based topologies. The direct parallel connect of two back-to-back CSCs is the first type, the two DC links can be controlled from the rectifier side...
This paper investigates an economic and highly efficient power converter topology and its modulation scheme for 60kW buck-type rectifier system. The target system consists of three-phase three-switch buck-type rectifier topology. A new Carrier Based PWM scheme along with its simple implementation using logic gates is introduced. This PWM scheme replaces the diode rectifier equivalent switching state...
The Z-Source networks are recently being employed in the matrix converters (MCs) to overcome their main drawback, which is the low voltage transfer ratio (VTR). In spite of several Z-Source topologies introduced for the direct and indirect matrix converters, some important issues such as their modulation, operational modes, existing challenges in practical implementation, the design of an optimal...
This paper proposes the improved topology and control strategy of three-phase cascaded bridgeless rectifier (CBR) suitable to serve as the rectifier stage for a medium/high voltage multilevel converter. Compared with traditional H-bridge based multilevel rectifiers, the proposed topology adopts much fewer fully-controlled devices, which greatly reduces the control complexity, thus increasing the system...
The paper presents a dual output AC-DC converter as a suitable candidate in emerging DC distribution systems. In accordance with the need of vast range of DC loads and standard distribution levels, the proposed Dual Output PFC Rectifier has been designed to provide simultaneous boost and buck outputs. In addition, the design ensures that the rectifier operates at unity power factor while maintaining...
Vienna rectifiers are widely utilized in various industry applications due to low cost, high reliability and better EMI performance. However, the DC bus voltage balancing is always an issue to be considered due to the 3-level structure. Several DC bus balancing control methods are proposed during last decade. But these methods either require a large amount of calculations or cause inaccuracy at voltage...
In this paper, a novel three-phase rectifier based on triple line-voltage cascaded VIENNA converters has been proposed. A comprehensive analysis to the proposed converter is presented. Compared to conventional three-phase cascaded H-bridge converters, in the proposed new multilevel converters, the switch voltage stress is reduced, and fewer switches and dc capacitors are required under the similar...
In this paper, a topology of three-phase buck rectifier which is suitable for the low output voltage application and its control principle are proposed to reduce the cost and simplify the control. The proposed topology uses the phase voltage instead of the line voltage to supply power. Thus, it can decrease the rating voltage of switching devices, and save the cost. Moreover, the proposed control...
This work analyzes some possible converter switching strategies so as to achieve higher efficiency and better current waveforms in a high power and low cost three-phase and three-level active AC-DC conversion.
This paper presents an improved single phase seven-level active rectifier architecture controlled by finite control set model predictive control (FCS-MPC). The FCS-MPC is designed to enable power conversion with a unity power factor and generate seven level voltage waveform at the input. The proposed active rectifier architecture reduces harmonic contents of the rectifier input current by producing...
The paper presents a concept of seven switch power electronic topology capable of performing motoring, regeneration, plug-in charging and IC engine charging for converted plug-in hybrid topology. First, Integrated Converter act as charger reducing requirement of separate converter for charging with single phase charging functions (with the facility of three phase). Second, the same converter is used...
In this paper, concepts for an extended DC network for the main power supply of components from various manufacturers in industrial production are presented. In the first part, detailed requirements for such a network are given from the viewpoint of a customer. Based on those, different concepts for AC/DC conversion and energy management are discussed. As far as AC/DC conversion is concerned, the...
Taking two power cells cascaded as an example, a PWM algorithm is proposed for single-phase cascaded H-bridge three-level converter. Rectification operating mode of the three-level converter is described in detail in this paper. In order to lower the switching frequency and balance the capacitor voltage, the output voltage vectors are optimal selected for the rectification operating modes, and the...
The Vienna rectifier is a unidirectional boost type improved power quality ac-dc converter (IPQC). The rectifier topology is capable of providing a dc output voltage that is higher than the ac source voltage with improved power factor. The topology is compatible with the hysteresis current control (HCC) technique. It has the capacity to provide almost unity power factor with low current distortion...
The matrix converters are a promising solution in the industrial domain applications, a compact size with high performances and large scale control capability with high quality energy. The integration of MPC (model reductive control) theory based on finite number of control input into drivers led to the development of innovative technique to improve the control optimality. Through this paper, an indirect...
Increased size and capacity of individual wind turbine has posed a major challenge for high power conversions. For this scenario advanced multilevel converter topologies and parallel operation of Active Front End (AFE) rectifiers are gaining popularity. But there are issues on reliability and complicacy of control and operation of active power electronic devices at such high power. The Passive Front...
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