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

ABSTRACT

In this paper, a novel high development up dc/dc converter is shown for reasonable power source applications. The proposed structure includes a coupled inductor and two voltage multiplier cells, in order to get high development up voltage gain. In addition, two capacitors are charged in the midst of the kill time frame, using the essentialness set away in the coupled inductor which assembles the voltage trade gain. The imperativeness set away in the spillage inductance is reused with the usage of an inactive catch circuit. The voltage load on the key power switch is also diminished in the proposed topology. In this manner, an essential influence switch with low restriction RDS(ON) can be used to diminish the conduction adversities. The action rule and the persevering state examinations are discussed by and large. To check the execution of the showed converter, a 300-W lab demonstrate circuit is completed. The results favor the speculative examinations and the practicability of the displayed high development up converter.

 BLOCK DIAGRAM:

image001

image002

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

CIRCUIT DIAGRAM:

image003

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:

image004

  •                                                             (a)
  • image005                                                                    (b)

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.

 image006                                                         (a)

image007

  •                                                           (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.

image008

(a)

image009

  •                                                                 (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

In this paper, a novel high advancement up dc/dc converter is appeared sensible power source applications.

The proposed structure incorporates a coupled inductor and two voltage multiplier cells, so as to get high improvement up voltage gain.

Moreover, two capacitors are charged amidst the kill time allotment, utilizing the vitality set away in the coupled inductor which collects the voltage exchange gain.

The significance set away in the spillage inductance is reused with the utilization of an inert catch circuit. The voltage stack on the key power switch is additionally reduced in the proposed topology. As such, a fundamental impact switch with low limitation RDS(ON) can be utilized to lessen the conduction misfortunes. The activity rule and the enduring state examinations are talked about all things considered. To check the execution of the indicated converter, a 300-W lab show circuit is finished. The outcomes support the theoretical examinations and the practicability of the showed high improvement up converter.

Leave a Reply

Your email address will not be published. Required fields are marked *