KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Access type: UnknownAuthor: search.filters.author.Singhasivanon, Jakawan

Search Results

Now showing 1 - 4 of 4
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Investigation on Current Ripple and Electromagnetic Interference in High Voltage Powertrain Systems for Electric Vehicles by Using Crosslinked Polyolefin Insulation Shielded Cable
    (2022-01-01)
    Singhasivanon, Jakawan
    ;
    Jirasuwankul, Nirudh
    ;
    Kiddee, Kunagone
    At this moment, the powertrain system of Electric Vehicles (EVs) tends to use high voltages and high currents when the EVs operate at High Power (HP) mode. The Electromagnetic Interference (EMI) is caused by Electromagnetic Field (EF), high voltage, and current ripple. EMI affects EVs, whereas the Shielding Effectiveness (SE), and the proportional inverse of the transfer impedance prevent the effect of EMI. This research aims to investigate the current ripple the EMI in high voltage powertrain systems for EVs by using the developed crosslinked polyolefin insulation shielded cable, 50 mm<sup>2</sup> single-core HP XLPO shielded cable with 0.15 mm annealed tinned-copper wire braid material. The experiment consists of three parts. The first one investigates the tendency of SE and current ripple. The second part shows the analysis of the effect of HP mode to the cable. The third part is an additional study that compares and analyzes the transfer impedance. The results indicate that the cable operates properly in the frequency above 200 Hz, transfer impedance decreasing between 11.5% to 15.25%, induces the SE and reduces the current ripple in the higher frequency range. The results obtained from this research represent a preliminary investigation guideline in decreasing the effect of EMI in EVs by using 50mm<sup>2</sup> single-core HP XLPO shielded cable with 0.15 mm annealed tinned-copper wire braid material in a high-power range.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    The preliminary study of partial discharge behavior of crosslinked polyolefin (XLPO) unshielded cable insulation under temperature variations
    (2021-05-19)
    Singhasivanon, Jakawan
    ;
    Jirasuwankul, Nirudh
    An emerging of new material, XLPO, has now been widely used as power cable insulation and it is necessary and compulsory to perform compliant standard test. According to the IEC 60270, partial discharge (PD) test is the promised and nonintrusive method to determine quality of insulation. In this paper, XLPO insulation of the unshielded cable has been preliminary tested by measuring its PD behavior under different temperature exposure. The experimental results illustrate that occurrence of partial discharge inception voltage (PDIV) forms as parabola with a convex trend under temperature variations. It is also found that XLPO is less susceptible to PDIV when compared to PVC insulation under the same conditions.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    An experimental study on dielectric response of the crosslinked polyolefin (XLPO) insulation of the unshielded cable under electric field and heat flux
    (2021-05-19)
    Singhasivanon, Jakawan
    ;
    Jirasuwankul, Nirudh
    Nowadays, crosslinked polyolefin cables (XLPO cables) are more popular and more famous for electrical insulation. In order to study and analyze the characteristics of insulation. The polarization and depolarization of current measurements (PDC measurement) is one of the advance methods that can compute and provide dielectric reaction parameters. In this paper, aim to study dielectric response of the XLPO insulation of unshielded cables under electric fields and heat fluctuations by measuring permittivity (ϵ′, r), conductivity (σ) and dissipation factors (Tan δ). The experimental results indicate permittivity is rather constant at different field strengths and temperatures and are similarly to XLPE insulation. It is also found that the activation energy of XLPO insulation is 0.77 eV. Future more, action energy in this research can excite electrons or ions in valent band within insulations to change the state from non-conductivity to conductivity.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Comparative Testing of Breakdown Voltage Versus Polarization Current of 0.6/1kV XLPE Cables with Different Defects
    (2018-07-02)
    Singhasivanon, Jakawan
    ;
    Jirasuwankul, Nirudh
    ;
    Pattanadech, Norasage
    In this paper, a study of breakdown voltage versus polarization current was performed comparatively to explore whether there was an existing of relationship between the two phenomena. The experiment was performed on low voltage \pmb{(0.6/1\mathrm{kV})} XLPE cables with three different cases of defect, case 1: conductor cladded with small and thin copper strip, case 2: conductor cladded with thin plastic ring, and case3: conductor cladded with plane paper strip. The results illustrated that breakdown voltage tends adversely to polarization current in all test cases. When the polarization current was increasing, the breakdown voltage was decreasing. Whereas the polarization current was decreasing, the breakdown voltage was increasing. It was also found that defective cable with thin copper strip has the lowest breakdown voltage whereas one with plane paper strip has the highest breakdown voltage.