Pongswatd, Sawai
Loading...
Preferred name
Pongswatd, Sawai
Alternative Name
Pongswatd, S.
Main Affiliation
Email
sawai.po@kmitl.ac.th
37 results
Now showing 1 - 10 of 37
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, The technique to generate firing signal of converter for linear DC output(2008-12-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Foundation fieldbus-based laboratory: A case study of Harmonas-DEO system(2011-01-01); ; ; Julsereewong, PrasitThis paper presents a Foundation Fieldbus-based laboratory for education of automation infrastructure. Design and implementation of a level-control plant model using multi-vendor field devices is proposed. Harmonas-DEO fieldbus system is described as an illustrative case study for configuring and commissioning fieldbus segment, defining control strategy, designing human machine interface (HMI) screen, and troubleshooting. Fieldbus control valve diagnostics based on the use of Valstaff are also included. © 2011 SICE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Parallel 5x step-up SC DC-DC converter for power efficiency improvement(2011-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Digital fieldbus-Analog system integration for revamping projectsThis paper presents a system integration of modern digital fieldbus and traditional analog devices for revamping projects. Using temperature transmitter with Foundation Fieldbus technology and power regulator with 4-20 mA control input for temperature control based on a PID instruction of programmable logic controller (PLC) is examined as an illustrative case study. A portable plant model was designed and implemented for real hands-on training. In addition, basic network and device configurations as well as ladder logic program and graphical user interface creations are discussed. Experimental results of temperature control in the range of 40-60 °C verifying the proposed concept are also included. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Isolated current feedback control for buck converter(2005-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Automatic SPRT module calibration using automated low thermal matrix scanners(2011-08-12); ; Masuchun, RuedeeIn general, the process of the SPRT module calibration takes long time and requires all employees participation in the calibration process, and it also requires an expert for calculation of results and measurement uncertainty. All of these waste a vast amount of working time. Therefore, this paper provides the automatic SPRT module calibration process which can reduce the steps of calibration, resulting in process time reduction and the automatic process doesn't require the expert to calculate results and measurement uncertainty. © 2011 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Parallel-connected high voltage multiplier with symmetrical structure(2014-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Application of GD3 in value engineering for plastic-part design(2008-12-01); ; Ukakimaparn, PrapartThis paper presents the technique in way engineering value that comes to apply for designing of product plastic. The technique analyzes the data of designing by GD<sup>3</sup> and measures defensive problem in advance of engineering value. Consequently, the technique can prevent the problem and control the designing relate to engineering value before build a mold for product. For acquire knowledge give with the work and can design the product that can have picture stability. Moreover, This technique can decrease material loss, time operation and inventory. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Applying radar chart for process control behavior(2018-06-08); This paper presents the technique to show the controller parameters value that can support decision making of controller action and instruments, actuator operation. In addition, energy consumption is detected of any points of process operation. The paper describes method to detect and collect the assigned process control parameters from process components then display their parameters by radar chart. All of assigned parameters are used to construct the plotted of radar figure. The paper designs background and foreground by representation with rectangular array and length of each spoke in radar chart is proportional to magnitude of set value(SV), manipulate value(MV), process value(PV) of PID controller parameters. In addition, watt power (W) of energy consumption in the process is detected and stored. Each spoke of radar chart represents each parameter that converts to scale as 0-100%. The script functions are developed at the SCADA (Supervisory Control and Data Acquisition) station to detect, collect and scale, then store detected parameters in database. The experiments perform in case study of level loop control of water tank processes by using a proportion-integral-derivative (PID) function in the Programmable Logic Controller (PLC) and Wonderware InTouch SCADA software. The technique can apply for exiting SCADA to create the radar chart. Nevertheless, the new version of SCADA software can support the feature but it depends on cost license fee. Moreover, the technique can support the operators and engineers to make decision of process devices performance (instrument, actuator, controller), process operation and condition. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of a switched-capacitor-based serial DC-DC converter using clean energy power supplies(2010-07-30); ; Tirasesth, KittiFor mobile back-lighting applications, a switched-capacitor-based serial DC-DC converter using solar power supplies is proposed in this paper. Unlike conventional switched-capacitor DC-DC converters, the proposed converter pushes up the output voltage of a switched-capacitor-based circuit by the voltage of solar cells. For this reason, the proposed converter can realize not only long battery runtime but also small hardware-cost and wide input-range. Concretely, in comparison with the conventional parallel converter using 1.5× step-up SC converters, the proposed converter can achieve 20% reduction of hardware cost and 16% extension of input range. The characteristics of the proposed converter are clarified by theoretical analyses. Furthermore, SPICE simulations and experiments show the validity of circuit design, where theoretical results correspond well with simulation results.