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Full wave rectifier01:22

Full wave rectifier

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A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
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The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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Analytical Optimal Load Calculation of RF Energy Rectifiers Based on a Simplified Rectifying Model.

Lichen Yao1,2, Guido Dolmans1,2, Jac Romme2

  • 1Electronics System, Department of Electrical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.

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|December 10, 2021
PubMed
Summary

This study introduces an efficient numerical method to optimize rectifier load for wireless power transfer systems. The technique maximizes energy rectifier efficiency without complex simulations, crucial for wireless powered communication networks.

Keywords:
RFWPTanalyticalclosed-formhalf waveload resistancerectifiervoltage multiplier

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Area of Science:

  • Electrical Engineering
  • Wireless Communication
  • Energy Harvesting

Background:

  • Wireless power transfer (WPT) is vital for wireless powered communication networks (WPCNs).
  • Energy rectifier efficiency depends heavily on input power and load conditions.
  • Optimizing rectifier performance is key for efficient WPT systems.

Purpose of the Study:

  • To present a low-complexity numerical method for calculating the optimal load to maximize rectifier efficiency.
  • To avoid time-consuming simulations by using an analytical rectifier model.
  • To provide closed-form solutions for low-input power scenarios.

Main Methods:

  • Developed a numerical method based on a simplified analytical rectifier model, including parasitic parameters.
  • Utilized the Lambert-W function and perturbation method for closed-form solutions in low-power cases.
  • Validated the method using extensive transient simulations and experimental measurements across various diodes and frequencies.

Main Results:

  • The proposed numerical method accurately calculates optimal loads for different rectifier topologies (half-wave, voltage-multipliers).
  • Validation confirmed high accuracy with single sinewave and multisine input signals, provided low output voltage ripple.
  • Experimental results from fabricated 400 MHz voltage multipliers corroborated the method's effectiveness.

Conclusions:

  • The presented numerical method offers an efficient and accurate approach to optimize energy rectifier efficiency in WPT systems.
  • This technique is applicable to various rectifier designs and input signal types, enhancing WPCN performance.
  • The method simplifies the optimization process, enabling faster design cycles for wireless power applications.