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Microfabrication and integration of a sol-gel PZT folded spring energy harvester.

Lueke J, Badr A, Lou E, Moussa WA - Sensors (Basel) (2015)

Bottom Line: A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit.The efficiency and charging current must be balanced to achieve a high output and a reasonable output current.The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, University of Alberta, University of Alberta, Edmonton, AB T6G 2G8, Canada. lueke@ualberta.ca.

ABSTRACT
This paper presents the methodology and challenges experienced in the microfabrication, packaging, and integration of a fixed-fixed folded spring piezoelectric energy harvester. A variety of challenges were overcome in the fabrication of the energy harvesters, such as the diagnosis and rectification of sol-gel PZT film quality and adhesion issues. A packaging and integration methodology was developed to allow for the characterizing the harvesters under a base vibration. The conditioning circuitry developed allowed for a complete energy harvesting system, consisting a harvester, a voltage doubler, a voltage regulator and a NiMH battery. A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit. It was found that the maximum efficiency does not correlate to the maximum charging current supplied to the battery. The efficiency and charging current must be balanced to achieve a high output and a reasonable output current. The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

No MeSH data available.


Related in: MedlinePlus

The simulated and experimental efficiency of the conditioning circuit for varying input voltage, for three input frequency cases (100 Hz, 200 Hz, and 300 Hz).
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sensors-15-12218-f020: The simulated and experimental efficiency of the conditioning circuit for varying input voltage, for three input frequency cases (100 Hz, 200 Hz, and 300 Hz).

Mentions: From the consistency of the efficiency behavior of the circuit for a variety of input frequency and input voltage cases in Figure 18 and Figure 19 for varying battery voltage, it can be concluded that at a specific battery voltage, lower input frequency and voltage will lead to a higher circuit efficiency. To understand the interdependency of input frequency and voltage on the efficiency of the conditioning circuit, the efficiency of the circuit will be examined for varying input voltages and frequencies at a fixed battery voltage. The efficiency behavior for varying input voltage and frequency, at a fixed nominal battery voltage of 1.2 V can be seen in Figure 20 and Figure 21, respectively.


Microfabrication and integration of a sol-gel PZT folded spring energy harvester.

Lueke J, Badr A, Lou E, Moussa WA - Sensors (Basel) (2015)

The simulated and experimental efficiency of the conditioning circuit for varying input voltage, for three input frequency cases (100 Hz, 200 Hz, and 300 Hz).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507646&req=5

sensors-15-12218-f020: The simulated and experimental efficiency of the conditioning circuit for varying input voltage, for three input frequency cases (100 Hz, 200 Hz, and 300 Hz).
Mentions: From the consistency of the efficiency behavior of the circuit for a variety of input frequency and input voltage cases in Figure 18 and Figure 19 for varying battery voltage, it can be concluded that at a specific battery voltage, lower input frequency and voltage will lead to a higher circuit efficiency. To understand the interdependency of input frequency and voltage on the efficiency of the conditioning circuit, the efficiency of the circuit will be examined for varying input voltages and frequencies at a fixed battery voltage. The efficiency behavior for varying input voltage and frequency, at a fixed nominal battery voltage of 1.2 V can be seen in Figure 20 and Figure 21, respectively.

Bottom Line: A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit.The efficiency and charging current must be balanced to achieve a high output and a reasonable output current.The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, University of Alberta, University of Alberta, Edmonton, AB T6G 2G8, Canada. lueke@ualberta.ca.

ABSTRACT
This paper presents the methodology and challenges experienced in the microfabrication, packaging, and integration of a fixed-fixed folded spring piezoelectric energy harvester. A variety of challenges were overcome in the fabrication of the energy harvesters, such as the diagnosis and rectification of sol-gel PZT film quality and adhesion issues. A packaging and integration methodology was developed to allow for the characterizing the harvesters under a base vibration. The conditioning circuitry developed allowed for a complete energy harvesting system, consisting a harvester, a voltage doubler, a voltage regulator and a NiMH battery. A feasibility study was undertaken with the designed conditioning circuitry to determine the effect of the input parameters on the overall performance of the circuit. It was found that the maximum efficiency does not correlate to the maximum charging current supplied to the battery. The efficiency and charging current must be balanced to achieve a high output and a reasonable output current. The development of the complete energy harvesting system allows for the direct integration of the energy harvesting technology into existing power management schemes for wireless sensing.

No MeSH data available.


Related in: MedlinePlus