Mohd Nasir, Haslinah (2015) Low voltage amplification using self starting voltage regulator for storage system. Masters thesis, Universiti Teknikal Malaysia Melaka.
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Abstract
This thesis presents a storage system design based on energy harvesting to achieve battery-less use for low power application. This thesis basically deals with the effectiveness of DC to DC converter to boost the low input voltage of the harvested energy for energy storage system. This storage system’s function is to store the harvested energy collected from the environment surroundings such as vibration,salinity, RF energy and many more. As generally known, the output voltage of the harvested energy is insufficient for most applications and only generates extremely low power. In the case of wireless sensor network, for example, the sensor node would require energy only during transmitting and receiving data whereas during standby mode or sleep mode, the amount of energy required would be very small. Therefore, the storage system will make use of this standby time or sleep mode of the sensor node to store as much energy as possible. Moreover, a converter must be designed to boost up low input voltage harvested through vibration energy to the higher dc voltage. The method discussed in this thesis gives a promising solution to boost the low input voltage which comes from the rectified voltage of energy harvesting sources that is known to be extremely low voltage. The proposed approach is using MOSFET with the capability of fast switching to perform as the main switch and also as a switching regulator. The MOSFET will be driven by the Pulse Width Modulation (PWM) generated by oscillating circuit which is able to work even at low input voltage by using JFET component. The designed boost converter must be capable and sufficient to charge the super capacitor as an energy storage device and also provides power to energize the load application. The simulation and experimental results showed that the circuit is able to boost the input voltage as low as 0.1 V up to 0.75 V with the range of power efficiency within 82 % to 90 %. Even though the output results from the hardware experiment was lower than the simulation results where the efficiency of simulation can achieved up to 90 % but the experimental result only can achieved maximum 87 %, this is expected as there will be power losses at the component circuit especially in oscillation path, series resistance, diode and also the MOSFET.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | DC-to-DC converters, Energy storage, Low voltage amplification, Self starting voltage, Storage system |
| Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Library > Tesis > FKEKK |
| Depositing User: | Muhammad Afiz Ahmad |
| Date Deposited: | 31 Mar 2017 01:30 |
| Last Modified: | 07 Jun 2022 14:09 |
| URI: | http://eprints.utem.edu.my/id/eprint/18356 |
| Statistic Details: | View Download Statistic |
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