Manop, Chalermchat
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Manop, Chalermchat
Alternative Name
Manop, C.
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chalermchat.ma@kmitl.ac.th
12 results
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Item type:Publication, Design and Testing of Low Loss Distribution Transformer for Non-Linear Loading Current(2018-07-02); Jirasuwankul, N.Distribution transformers are typically designed to operate under linear loading current. Nowadays, an emerging of modern electric loads that equipped with power conversion devices, it is inevitable that, the transformers are subjected to supply non-linear current. Those are resulting in a considerable increment of heat loss, temperature rising and shortening of insulation lifespan. In case of planning for retrofit or new utility system design, replacing conventional transformer with the low loss one is introduced. This paper therefore proposes a design and testing of low loss transformer using K-Factor and modified winding eddy current loss (WEC). Test results show that efficiency and temperature rise of the new design outperforms conventional one under standard testing of linear and non-linear loads. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A lab-scale heliostat positioning control using fuzzy logic based stepper motor drive with micro step and multi-frequency mode(2017-08-23) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Air-gap power and rotor loss estimation for induction motor efficiency monitoring based on Kalman filtering(2013-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fault detection and protection of three-phase induction motor using Eigen based analysis(2016-10-24) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A study of performance and comparison of VSI with improved current waveshape for three-phase rectifier(2008-10-30); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Laboratory digital signal analysis with virtual spectrum analyzer(2005-12-01); Senavongse, WongwitThis paper present laboratory digital signal analysis with virtual spectrum analyzer which is created using LabVIEW program on digital oscilloscope TDS 5054. This research aims to develop a knowledge-base on digital signal analysis and the working of virtual instrumentation, a topic which is currently attracting wide interest due to its many good attributes including flexibility, modularity, and low cost. It also aims to make a good use of expensive digital oscilloscope TDS 5054. In this study, laboratory spectrum analysis is performed with variable sampling rate, effect of windows filter etc. The results are displayed by both time domain and frequency domain. There are samples of signal waveforms such as Sinusoidal Waveform, Square waveform, Six-step waveform, and PWM (pulse width modulation) waveform. These waveforms are important in the study of power electronics. The data are obtained using special module program to extract information from the digital oscilloscope. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A low cost prototype for testing stator winding shorted turns in 3-phase induction motors(2005-12-01); ; Tangsiriworakul, ChanwitThis paper presents a prototype of stator winding shorted turns detector for three-phase induction motors. The focus condition is turn-to-turn short circuit, because this condition is the initial problem. The diagnosis technique is detectable from the voltage sum of the three instantaneous line to star-point voltage. In the testing, the supply is sinusoidal waveform and the motor must be star connected with floating neutral. Before diagnosis, this instrument will also determine the level of supply voltage imbalance, if it is over the limit, the test instrument will not diagnose shorted turns. From experimental results, 3-hp and 5-hp induction motors were used for testing this equipment which is capable of accurately identifying percentage of stator winding shorted turns. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Investigation of modulation index on iron losses in soft magnetic materials supplied by DMPWM inverter(2009-12-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The classification of regular and defected low voltage XLPE cable by using polarization and depolarization current method(2017-10-19); ; Jirasuwankul, N.Electric cable is an important part of utility power and distribution system. In order to keep the system operation safely and reliable, acceptance testing for cable is necessary not only inservice but also manufacturing process. This paper proposes a novel testing technique which is able to classify the difference between normal and defective low voltage XLPE cable, namely polarization and depolarization current technique (PDC). In this study, PDC testing of low voltage XLPE cable was performed comparatively among five different cases: cable contaminated with a piece of paper, case 2 : cable contaminated with a piece of plastic, case 3 : cable contaminated with grease, case 4 : cable contaminated with a piece of copper, and case 5 : Eccentric conductor cable. With environmental control of the testing process, the test results show the polarization current of the defective contaminated cable with copper is higher than that of the regular one, whereas it is lower than that of the defective one with paper, plastic and grease. It is also found that there was indistinctive of PDC in case of copper contaminated and eccentric conductor cable. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Open-Source IoT-Integrated SCADA System for Biomass Power Plant Monitoring(2024-01-01)