Voltage Quadrupler Rectifier Research Articles

Voltage Multiplier with High Input/Output Voltage Gain from Center-Tap Rectifier-Voltage Tripler and Quadrupler

This paper proposes new rectifiers in the center-tap transformer to provide higher input/output (I/O) voltage gain with an equal transformer turns-ratio in the LLC resonant converter: a voltage tripler rectifier and a voltage quadrupler rectifier, which have simple structures with one capacitor and two diodes, and three and four times higher I/O voltage gain than a center-tap rectifier, respectively. Each rectifier is compared in terms of the transformer turns-ratio and the magnetizing offset current, and the voltage and current stresses in the capacitors and diodes. The validity of these proposed rectifiers in the half-bridge (HB) LLC resonant converter is confirmed by the experimental results from a 100 V/200 W output prototype.

A Fe–Ga alloy cantilever film vibration harvester with a double-stage signal processing circuit and its main performance testing

With the power consumption of sensor nodes and wireless communication system have been significantly reduced from mW to μW, a new and interesting research field emerges, which is, the power generation technology through harvesting vibration energy from ambient vibration. It might represent a new way to overcome the unsatisfactory battery issue in low-power electronic devices. The aim of this study is on outlining, the basic behavior of a Fe87Ga13 based cantilever harvesting systems. Based on the previous research results in this field, we proposed a cantilever film vibration harvester using Fe–Ga alloy and a double-stage signal processing interface circuit. It was a composite beam structure as a whole in which the Fe–Ga alloy layer and basal layer were closely wound with a pickup coil of wire. The coupling correlation relationship of multi-fields, including mechanical, magnetic and electrical, occurring in the harvester, were analyzed utilizing a distributed-parameter model. Experimental testing were conducted to thoroughly research the main working performance of the harvester which was under the base excitation or transient free excitation, and the main working performances of Fe–Ga alloy based cantilever harvester were obtained clearly. The DC output from the double-stage interface circuit reached to 17.7 V which was far greater than 1.6 V only amplified through a voltage quadrupler rectifier circuit. The prototype succeeded to keep lighting up multi-LEDs, which validated the power generation capability of the prototype and the feasibility of the interface circuit and allowed us to imagine such harvester to supply LED indicators, wireless sensor nodes and other devices with low power consumption.

A Voltage Quadrupler Rectifier Based Pulsewidth Modulated LLC Converter With Wide Output Range

LLC resonant converter is a soft switching frequency modulated dc–dc topology with its switching frequency near the resonant frequency. However, in applications where a wide output voltage is desired, it is extremely difficult to tune its operation close to the resonant frequency. In this paper, a novel pulsewidth modulated LLC type resonant converter based on voltage quadrupler rectifier is proposed. The proposed converter always operates at the resonant frequency and is able to achieve a wide output voltage range by modulating the duty cycle of the secondary side auxiliary mosfet . This brings the benefits of the decreased circulating current and corresponding conduction loss, as well as the simplification of the parameters selection and magnetic component design. Zero-voltage-switching and zero-current-switching are realized among all power mosfet s and all power diodes, respectively. Detailed circuit operation principles and modeling method are presented. A 1.3-kW converter prototype, generating 250–420 V output from 390-V dc-link is designed. Both the circuit functionality and the theoretical analysis are verified in the experimental results.

Time‐division‐multiplex control scheme for voltage multiplier rectifiers

A voltage multiplier rectifier with a novel time-division-multiplexing (TDM) control scheme for high step-up converters is proposed in this study. In the proposed TDM control scheme, two full-wave voltage doubler rectifiers can be combined to realise a voltage quadrupler rectifier. The proposed voltage quadrupler rectifier can reduce transformer turn ratio and transformer size for high step-up converters and also reduce voltage stress for the output capacitors and rectifier diodes. An N -times voltage rectifier can be straightforwardly produced by extending the concepts from the proposed TDM control scheme. A phase-shift full-bridge (PSFB) converter is adopted in the primary side of the proposed voltage quadrupler rectifier to construct a PSFB quadrupler converter. Experimental results for the PSFB quadrupler converter demonstrate the performance of the proposed TDM control scheme for voltage quadrupler rectifiers. An 8-times voltage rectifier is simulated to determine the validity of extending the proposed TDM control scheme to realise an N -times voltage rectifier. Experimental and simulation results show that the proposed TDM control scheme has great potential to be used in high step-up converters.

LLC Resonant Converter With Semiactive Variable-Structure Rectifier (SA-VSR) for Wide Output Voltage Range Application

A semiactive variable-structure rectifier (SA-VSR) is proposed for the LLC resonant converter to achieve wide output voltage range power conversion. The SA-VSR is composed of two active switches and two diodes. The SA-VSR is operated as a voltage-doubler rectifier when the duty cycle of the active switches is 0.25, whereas it is a voltage-quadrupler rectifier when the duty cycle of the active switches is 0.5. Hence, the output voltage range is extended by adaptively changing the operation mode of the rectifier, which results in reduced switching frequency range, circulating current, and conduction losses of the LLC resonant converter. The switches’ switching frequency of the SA-VSR is halved in comparison with the switches on the primary side of the LLC resonant converter, and zero voltage switching and zero current switching are achieved for all the active switches and diodes, respectively, to reduce the switching losses. The operation principles are analyzed and a 1.5-kW prototype with 400-V input voltage and 100–500-V output voltage is built and tested to verify the feasibility of the proposed method.

High step‐up isolated resonant converter with voltage quadrupler rectifier and dual‐phase‐shift control

An isolated resonant converter with voltage-quadrupler rectifier (VQR) and dual-phase-shift (DPS) control strategy is proposed for high step-up and wide voltage range applications. The VQR is composed of a resonant-type voltage doubler and a conventional voltage doubler. The output voltage is improved and the voltage stresses of the secondary-side devices are reduced significantly. Hence, low voltage-rated switches and diodes with better switching and conduction performances can be applied to improve the efficiency. The DPS modulation strategy is adopted to implement the boost and buck modes operation, and to achieve wide voltage gain range. With the DPS control strategy, zero-voltage switching performance is achieved for both the primary and secondary sides power devices, and zero-current switching is achieved for all of the diodes within the entire voltage and load ranges. The operational principles and characteristics of the proposed converter are presented in detail. The analysis and performance have been fully validated experimentally on a 400 V/400 W output hardware prototype.

Advanced Symmetrical Voltage Quadrupler Rectifiers for High Step-Up and High Output-Voltage Converters

An advanced symmetrical voltage quadrupler rectifier (SVQR) is derived in this paper to serve as the secondary rectification topology, which helps to extend the converter voltage gain and reduce the output diode voltage stresses. The output voltage is four times of the conventional full-bridge voltage rectifier with the same transformer ratio, which benefits to reduce the turns ratio of the transformer and decrease the parasitic parameters. Also, low voltage-rated diodes with high switching performance can be applied to improve the efficiency. Meanwhile, all the diodes in SVQR have the same voltage and current stresses, which simplifies the thermal design. Furthermore, two output electrolytic capacitors are connected in series to share the high output voltage, and the voltage balance can be realized naturally without any additional voltage-sharing scheme. A clear picture is made in this paper to give a general framework and universal applications for the derived SVQRs for high step-up and high output voltage conversion systems. A dual boost converter is used as an example to demonstrate the clear advantages of the derived SVQRs.

Single-Phase Voltage-Quadrupler Rectifier Using Only One Dual-Switch Power Module

A single-phase voltage-quadrupler rectifier using only one dual-switch power module is presented. This is based on the half-bridge converter and the higher output voltage can easily be obtained by introducing the pumping action. The prototype, employing a power module with two insulated-gate bipolar transistors, is implemented. The experimental results under the current-mode control confirm that the input current can be wave-shaped sinusoidally with a near-unity power factor.

Single-Phase Voltage-Quadrupler Rectifier With Sinusoidal Input Current

A single-phase voltage-quadrupler rectifier with sinusoidal input current is presented. This has the circuit configuration that is based on the combination of a half-bridge rectifier and pump circuits. The circuit can be operated in the switching states for pumping action to pump twice the peak supply voltage onto each of the output capacitor and for forcing the input current to follow its sinusoidal reference in the vicinity of a zero crossing of the supply. The prototype tested, using the insulated gate bipolar transistors and a controller for the output voltage regulation, is implemented to investigate the operation. The experimental and the simulated results confirm that the input current can be waveshaped sinusoidally with a near-unity power factor.