A Multi-Input Bridgeless Resonant AC-DC Converter for Electromagnetic Energy Harvesting

ABSTRACT

In this paper, a novel high advance up dc/dc converter is displayed for sustainable power source applications. The proposed structure comprises of a coupled inductor and two voltage multiplier cells, so as to get high advance up voltage gain. What’s more, two capacitors are charged amid the turn off period, utilizing the vitality put away in the coupled inductor which builds the voltage exchange gain. The vitality put away in the spillage inductance is reused with the utilization of a latent clasp circuit. The voltage weight on the fundamental power switch is additionally decreased in the proposed topology. Subsequently, a fundamental power switch with low opposition RDS(ON) can be utilized to decrease the conduction misfortunes. The activity guideline and the relentless state examinations are talked about altogether. To check the execution of the exhibited converter, a 300-W lab model circuit is actualized. The outcomes approve the hypothetical examinations and the practicability of the exhibited high advance up converter.

 BLOCK DIAGRAM:

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Fig. 1. Multi-channel EMR generators and PEI system: (a) conventional PEI; and (b) proposed multi-input PEI.

CIRCUIT DIAGRAM:

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Fig. 2. Illustrative scheme of the proposed multi-input converter (v(i)emf: EMF of #i reed; r(i)EMR: coil resistance; L(i)EMR: self-inductance; i(i)EMR: reed terminal current; v(i)EMR: reed terminal voltage; C(i)r1= C(i)r2: resonant capacitors; Lr: resonant inductor; Q(i)r1, Q(i)r2: MOSFETs; Dr: output diode; Co: output capacitor).

EXPERIMENTAL RESULTS:

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  •                                                             (a)
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Fig. 3. Experimental waveforms of power amplifiers: fin = 20 Hz; X-axis: 10 ms/div; Y-axis: (a) vemf = 3 Vrms; Ch1 = output voltage (Vo), 2.5 V/div; Ch2 = terminal voltage (vEMR) of reed #1, 10 V/div; Ch3 = input current (iEMR) of six reeds, 50 mA/div; and (b) vemf = 0.5 Vrms; Ch1 = output voltage (Vo), 0.5 V/div; Ch2 = terminal voltage (vEMR) of reed #1, 5 V/div; Ch3 = sum of the input currents (iEMR) of six reeds, 10 mA/div.

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  •                                                           (b)

Fig. 4. Experimental waveforms of power amplifiers with step change: X-axis: 40 ms/div; Y-axis: (a) vemf = from 1 Vrms to 2 Vrms; Ch1 = output voltage (Vo), 1 V/div; Ch2 = terminal voltage (vEMR) of reed #1, 5 V/div; Ch3 = input current (iEMR) of six reeds, 50 mA/div; and (b) fin = from 20 Hz to 50 Hz; Ch1 = output voltage (Vo), 0.5 V/div; Ch2 = terminal voltage (vEMR) of reed #1, 5 V/div; Ch3 = input current (iEMR) of six reeds, 50 mA/div.

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(a)

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  •                                                                 (b)

Fig. 5. Experimental waveforms of EMR generators: X-axis: (a) 20 ms/div; (b) 100 ms/div; Y-axis: (a) constant wind speed; (b) wind speed step change; Ch1 = terminal voltage (vEMR) of reed #2, 5 V/div; Ch2 = output voltage (Vo), 1 V/div; Ch3 = terminal voltage (vEMR) of reed #1, 10 V/div; Ch4 = input current (iEMR) of reed #1, 10 mA/div.

 CONCLUSION

This paper shows another high-advance up dc/dc converter for sustainable power source applications. The recommended converter is appropriate for DG frameworks dependent on sustainable power sources, which require high-advance up voltage exchange gain. The vitality put away in the spillage inductance is reused to enhance the execution of the exhibited converter. Besides, voltage weight on the primary power switch is decreased. Accordingly, a switch with a low on-state obstruction can be picked. The enduring state task of the converter has been dissected in detail. Additionally, the limit condition has been acquired. At long last, an equipment model is executed which changes over the 40-V input voltage into 400-V yield voltage. The outcomes demonstrate the plausibility of the introduced converter.

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