JPE 13-1-5 Novel Zero-Voltage-Switching Bridgeless PFC Converter (original) (raw)
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Novel Zero-Voltage-Switching Bridgeless PFC Converter
Journal of power electronics
In this paper, a new zero-voltage-switching, high power-factor, bridgeless rectifier is introduced. In this topology, an auxiliary circuit provides soft switching for all of the power semiconductor devices. Thus the switching losses are reduced and the highest efficiency can be achieved. The proposed converter has been analyzed and a design procedure has been introduced. The control circuit for the converter has also been developed. Based on the given approach, a 250 W, 400 Vdc prototype converters has been designed at 100 kHz for universal input voltage (90-264 Vrms) applications. A maximum efficiency of 94.6% and a power factor correction over 0.99 has been achieved. The simulation and experimental results confirm the design procedure and highlight the advantages of the proposed topology.
A New High Efficiency High Power Factor ZVT Bridgeless PFC Converter
Hamid Torkkhah, 2016
In this paper, a new zero voltage transition (ZVT) bridgeless PFC converter with high power factor and high efficiency is presented. The proposed converter has not any extra voltage stresses on semiconductor elements. Main switches of converter are switched under zero voltage (ZV) condition. Also the auxiliary switch is turned on under zero current (ZC) and turned off under zero voltage and current (ZVZC) condition. Due to use of bridgeless topology and soft switching technique simultaneously the converter's efficiency is higher than conventional counterpart. Also the proposed converter does not need the float gate driver. The operation of proposed converter is analyzed theoretically and the operation modes are presented. The design considerations are explained by a design example. The proposed converter is simulated by PSIM software to show the validity of theoretical analysis. The simulation results are compared with theoretical waveforms. The efficiency simulation in ORCAD software shows 2% efficiency improvement in comparison with conventional PFC boost converter.
Zero-Current-Transition Bridgeless PFC Without Extra Voltage and Current Stress
IEEE Transactions on Industrial Electronics, 2009
In this paper, a new zero-current-switching highpower-factor (PF) rectifier with pulsewidth-modulation control is introduced. The auxiliary circuit provides soft switching for all semiconductor devices without any extra current and voltage stress on the main switches. The proposed converter is bridgeless, and all semiconductor devices are soft switched. In addition, there is no extra stress on the switches. Thus, the conduction and switching losses are reduced and maximum efficiency is achieved. The converter is designed and simulated, and a prototype is implemented to verify the system performance. The experimental results exhibit high PF and efficiency of the proposed converter.
New zero-voltage-switching bridgeless PFC, using an improved auxiliary circuit
This study presents a new zero-voltage-switching (ZVS) single-phase bridgeless PFC, using an improved auxiliary circuit to achieve ZVS for all main switches and diodes. Compared to other ZVS bridgeless PFC converters with no extra voltage and/or current stresses, the converter presented here uses lower component count. Since the presented PFC uses a bridgeless rectifier, there are only two semiconductor components in the main current path instead of three in conventional single-switch configurations. This property decreases the conduction losses, significantly. Moreover, ZVS removes switching loss of all main switches and diodes. Furthermore, since resonant current passes only through the auxiliary circuit, there is no extra current and/or voltage stress on the main switches and diodes. The auxiliary switch operates in zero-current conditions; therefore it does not introduce any switching loss. The presented converter just needs a simple non-isolated gate drive circuitry to drive all switches. Nine stages are explained for each ZVS switching period. Design considerations and a control strategy are also explained. Finally, the converter operation is verified by simulation and experimental results.
IEEE International Conference ICIT-2006 at IIT-Bombay, Mumbai, Maharashtra, INDIA, 2006
These A novel Power Factor Correction (PFC) Converter employing Zero Voltage Transition (ZVT) technique based boost topology is proposed in this paper. It operates at a fixed frequency while achieving zero voltage turn-on of the main switch and zero current turn-off of the boost diode. This is accomplished by employing resonant operation only during switch transitions. During the rest of the cycle, the resonant network is essentially removed from the circuit and converter operation is identical to its non-resonant counterpart. This technique increases the efficiency to 95% and power factor to 0.99. Soft switching of the diode also reduces EMI, an important system consideration.The principle of operation, theoretical analysis, simulation results and experimental results are presented. A prototype of 1000W is built to test the proposed topology. The input voltage is from 170 Vrms to 250 Vrms. The output voltage is 400V. The operation frequency is 250 KHz.
A New Zero-Voltage-Switching Bridgeless PFC, Using an Active Clamp
Journal of Power Electronics, 2012
This paper presents a new ZVS single phase bridgeless (Power Factor Correction) PFC, using an active clamp to achieve zero-voltage-switching for all main switches and diodes. Since the presented PFC uses a bridgeless rectifier, most of the time, only two semiconductor components are in the main current path, instead of three in conventional single-switch configurations. This property significantly reduces the conduction losses,. Moreover, zero voltage switching removes switching loss of all main switches and diodes. Also, auxiliary switch turns on zero current condition. The presented converter needs just a simple non-isolated gate drive circuitry to drive all switches. The eight stages of each switching period and the design considerations and a control strategy are explained. Finally, the converter operation is verified by simulation and experimental results.
This paper presents a new ZVS single phase bridgeless (Power Factor Correction) PFC, using an active clamp to achieve zero-voltage-switching for all main switches and diodes. Since the presented PFC uses a bridgeless rectifier, most of the time, only two semiconductor components are in the main current path, instead of three in conventional single-switch configurations. This property significantly reduces the conduction losses,. Moreover, zero voltage switching removes switching loss of all main switches and diodes. Also, auxiliary switch turns on zero current condition. The presented converter needs just a simple non-isolated gate drive circuitry to drive all switches. The eight stages of each switching period and the design considerations and a control strategy are explained. Finally, the converter operation is verified by simulation and experimental results.
Soft Switching Bridgeless PFC Buck Converters
Journal of Power Electronics, 2012
Based on the standards that limit the harmonic pollution of electronic systems, the use of PFC converters is mandatory. In this paper, a new resonant bridgeless PFC converter is introduced. By eliminating the input bridge diodes, the efficiency is improved. Moreover, soft switching conditions for all of the semiconductor elements are achieved without adding any extra switches. As a result, high efficiency is attained. The proposed converter is analyzed and the theoretical and simulation results of the proposed converter are presented. In order to verify the validity of the analysis, a 40 w prototype converter is implemented and experimental results are presented. The experimental results show that high efficiency is attained while achieving a high power factor.
Turn-on turn-off zero-current-switching converter in power factor correction (PFC) application
2011 IEEE International Symposium on Industrial Electronics, 2011
This paper presents a turn-on turn-off zerocurrent-switching (ZCS) converter in a PFC boost application. The applied soft-commutation cell is capable of providing ZCS operation keeping the main switch current equal to the input current. Substituting the typical PWM cell found in classics power converter structures by the presented ZCS cell with three switches and taking to account the invariance principle, zero current switching of all active switches is achieved without additional current stress of the main switch. The operation of this converter as power factor pre-regulator (PFP) and main properties are also included. Design guidelines with a design example are described and verified by simulation results.
A New Single Switch Bridgeless SEPIC PFC Converter with Low Cost, Low THD and High PF
In this paper, a new single switch bridgeless AC/DC power factor correction PFC converter topology to achieve high PF and low THD is proposed. The proposed converter is based on the single ended primary inductance converter SEPIC topology. The SEPIC converters can operating from an input voltage that is greater or less than the output voltage. The proposed PFC uses only one active switch to PFC process together hoping higher PF and low THD. Besides the application cost is less than conventional bridgeless SEPIC PFC, in where two active switching devices are necessary. In order to verify the performance comparison between the proposed and the conventional SEPIC PFC, simulation circuit with 100W is install in PSIM. The simulation results are presented to demonstrate the feasibility of the proposed converters. The results show that the proposed bridgeless SEPIC PFC perfectly succeeds PFC operation using a single active switch.