Robust Design for Parts of Induction Bolt Heating System 


Vol. 36,  No. 2, pp. 10-17, Apr.  2021
10.14346/JKOSOS.2021.36.2.10


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  Abstract

This paper presents the robust design of each component used in the development of an induction bolt heating system for dismantling the high-temperature high-pressure casing heating bolts of turbines in power plants. The induction bolt heating system comprises seven assemblies, namely AC breaker, AC filter, inverter, transformer, work coil, cable, and CT/PT. For each of these assemblies, the various failure modes are identified by the failure mode and effects analysis (FMEA) method, and the causes and effects of these failure modes are presented. In addition, the risk priority numbers are deduced for the individual parts. To ensure robust design, the insulated-gate bipolar transistor (IGBT), switched-mode power supply (SMPS), C/T (adjusting current), capacitor, and coupling are selected. The IGBT is changed to a field-effect transistor (FET) to enhance the voltage applied to the induction heating system, and a dual-safety device is added to the SMPS. For C/T (adjusting current), the turns ratio is adjusted to ensure an appropriate amount of induced current. The capacitor is replaced by a product with heat resistance and durability; further, coupling with a water-resistant structure is improved such that the connecting parts are not easily destroyed. The ground connection is chosen for management priority.

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  Cite this article

[IEEE Style]

김두현, 김성철, 이종호, 강문수, 정천기, "Robust Design for Parts of Induction Bolt Heating System," Journal of the Korean Society of Safety, vol. 36, no. 2, pp. 10-17, 2021. DOI: 10.14346/JKOSOS.2021.36.2.10.

[ACM Style]

김두현, 김성철, 이종호, 강문수, and 정천기. 2021. Robust Design for Parts of Induction Bolt Heating System. Journal of the Korean Society of Safety, 36, 2, (2021), 10-17. DOI: 10.14346/JKOSOS.2021.36.2.10.

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