CK
Chatchaphon Ketviriyakit
LR
Lakkana Ruekkasaem
Phranakhon Rajabhat University
SJ
Supalux Jairueng
Faculty of Industrial Technology, Phranakhon Rajabhat University, Bangkok, Thailand.
PS
Phamorn Silapan
Department of Electrical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakornpathom, Thailand.