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

ABSTRACT

Bridgeless Resonant AC-DC converter in this paper, a novel high development up dc/dc converter is shown for reasonable power source function. The proposed structure contain a coupled inductor and two voltage multiplier cells, in order to get high grown up voltage gain.

COUPLED INDUCTOR

In addition, two capacitors are charged in the midst of the kill time frame, using the essentiality set away in the coupled inductor which gather the voltage trade gain.

AC-DC CONVERTER

Bridgeless Resonant AC-DC converter the exigency set away in the spillage inductance is restate with the usage of an inactive catch circuit. The voltage load on the key power switch is also reduce in the proposed topology. In this manner, an important power switch with low limit RDS(ON) can be used to decrease the conduction adversities.

BRIDGELESS

Bridgeless Resonant AC-DC converter the action rule and the persistent state examinations are explain by and large. To check the execution of the showed converter, a 300-W lab demonstrate circuit is achieved. The results favor the analytical examinations and the possibility of the displayed high development 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

Bridgeless Resonant AC-DC converter in this paper, a novel high progress up dc/dc converter is appeared sensible power source use.

VOLTAGE

Bridgeless Resonant AC-DC converter the proposed structure include a coupled inductor and two voltage multiplier cells, so as to get high growth up voltage gain.

INDUCTOR

Bridgeless Resonant AC-DC  converter moreover, two capacitors are charged between the kill time allocation, utilizing the energy set away in the coupled inductor which collects the voltage exchange gain.

RESONANT

Bridgeless Resonant AC-DC converter the meaning set away in the spillage inductance is reused with the usage of an inactive catch circuit. The voltage stack on the key power switch is additionally reduced in the proposed topology.

RESONANT AC-DC CONVERTER

As such, a fundamental impact switch with low limitation RDS(ON) can be apply to lessen the conduction misfortunes. Bridgeless Resonant AC-DC converter the activity rule and the lasting state examinations are talked about all things considered.

CIRCUIT

To check the execution of the indicated converter, a 300-W lab show circuit is finished .The outcomes support the theoretical examinations and the possibility of the showed high improvement up converter.

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