Azuwa Ali
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Preferred name
Azuwa Ali
Official Name
Azuwa, Ali
Alternative Name
Ali, Azuwa Binti
Ali, A.
Ali, Azuwa
Main Affiliation
Scopus Author ID
55628589769
Researcher ID
GCY-4599-2022

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  • Publication
    Analysis of AC-DC converter circuit performance with difference piezoelectric transducer array connection
    (Penerbit UTHM, 2020)
    Nik Ahmad Zainal Abidin
    ;
    Norkharziana Mohd Nayan
    ;
    Azuwa Ali
    ;
    N. A. Azli
    ;
    N. M. Nordin
    This research presents a simulation analysis for the AC-DC converter circuit with a different configurations of the array connection of the piezoelectric sensor. The selection of AC-DC converter circuits is full wave bridge rectifier (FWBR), parallel SSHI (P-SSHI) and parallel voltage multiplier (PVM) with array configuration variation in series (S), parallel (P), series-parallel (SP) and parallel-series (PS). The system optimizes with different load configurations ranging from 10 kΩ to 1 MΩ. The best configuration of AC-DC converter with an appropriate array piezoelectric connection producing the optimum output of harvested power is presented. According to the simulation results, the harvested power produced by using P-SSHI converter connected with 3 parallel piezoelectric transducer array was 85.9% higher than for PVM and 15.88% higher than FWBR.
  • Publication
    The simulation analysis of piezoelectric transducer with multi-array configuration
    ( 2020-01-07)
    Ahmad Kamil Zainal Abidin N.
    ;
    Norkharziana Mohd Nayan
    ;
    Azizan, Muhammad Mokhzaini
    ;
    Azuwa Ali
    ;
    Nuriziani Hussin
    ;
    Azli N.A.
    ;
    Nordin N.M.
    Low frequency energy harvesting using piezoelectric is one of promising method on harvesting energy from a free source. This method offered powering low load and remote device application. However, due to its nature which is inconsistency in providing the magnitude of input, specifically in low frequency harvesting, better solution to stable up and increase the converted output is explored widely. There are a few parameter that influences in the piezoelectric output generation. These parameter includes the type of piezoelectric, piezoelectric array configuration, AC-DC converter and etc. The types of the piezoelectric used in this project are the circular piezoelectric. When there is a force (motion) exerted on the piezoelectric disk, electrical charge was produced which initiated the energy conversion. In this research, the configuration of array connection for piezoelectric were investigated. The system is tested with different load configuration in a range of 10 kΩ to 1 MΩ. The design and development of the piezoelectric array variant were series (S), parallel(P), series parallel (SP) and parallel-series (PS). The observation emphasized on finding the best types of piezoelectric array configuration in producing optimum output of the harvested power. The simulation part consists of designing, simulating and analysing the result are done by using PSIM software. For validation of the simulation result, the implementation design of the hardware prototype that supplies pressure to piezoelectric have been done. In conclusion, a proper implementation of piezoelectric array configuration will produce optimum power output which can fulfil the minimum requirement of energy for powering low load device.
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