TY - GEN
T1 - Development of piezoelectric transformer-coupled solid state relay for electrical circuit control in railway systems
AU - Kuang, W.
AU - Or, Siu Wing
AU - Leung, C. M.
AU - Ho, Siu Lau
PY - 2012/2/28
Y1 - 2012/2/28
N2 - A solid state relay (SSR) is an electrical ON-OFF control device through which electrical power to the load is switched either ON or OFF by a small control signal. The device serves the same function as a classical electromechanical relay but carries no moving parts so that it has faster switching time, longer lifetime, higher reliability, no sparking, lower electrical noise, no mechanical noise, stronger tolerance to mechanical shock and vibration, smaller size, lighter weight, etc. Photo-coupled SSR (PcSSR) is regarded as the most popular type of SSR nowadays. However, the susceptibility of PcSSR to lightening or power surge often requires specific protection to ensure its normal function and performance, especially for railway systems. Recently, we have developed a novel type of SSR, called piezoelectric transformer-coupled SSR (PTcSSR), by using the high input-output isolation property of piezoelectric transformer for coupling between the input small-signal control circuit and the output load circuit. In this paper, we report the design, fabrication and performance of a 12 V dc input, 220 V, 2 A, 50 Hz ac output PTcSSR, and compare the measured performance data with those of a commercial PcSSR used for electrical circuit control in modern railway systems.
AB - A solid state relay (SSR) is an electrical ON-OFF control device through which electrical power to the load is switched either ON or OFF by a small control signal. The device serves the same function as a classical electromechanical relay but carries no moving parts so that it has faster switching time, longer lifetime, higher reliability, no sparking, lower electrical noise, no mechanical noise, stronger tolerance to mechanical shock and vibration, smaller size, lighter weight, etc. Photo-coupled SSR (PcSSR) is regarded as the most popular type of SSR nowadays. However, the susceptibility of PcSSR to lightening or power surge often requires specific protection to ensure its normal function and performance, especially for railway systems. Recently, we have developed a novel type of SSR, called piezoelectric transformer-coupled SSR (PTcSSR), by using the high input-output isolation property of piezoelectric transformer for coupling between the input small-signal control circuit and the output load circuit. In this paper, we report the design, fabrication and performance of a 12 V dc input, 220 V, 2 A, 50 Hz ac output PTcSSR, and compare the measured performance data with those of a commercial PcSSR used for electrical circuit control in modern railway systems.
KW - Electrical circuit control
KW - piezoelectric transformer
KW - railway systems
KW - safety
KW - solid state relay
UR - http://www.scopus.com/inward/record.url?scp=84857386406&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-27963-8_30
DO - 10.1007/978-3-642-27963-8_30
M3 - Conference article published in proceeding or book
SN - 9783642279621
T3 - Lecture Notes in Electrical Engineering
SP - 329
EP - 338
BT - Proceedings of the 1st International Workshop on High-Speed and Intercity Railways
T2 - 1st International Workshop on High-Speed and Intercity Railways, IWHIR 2011
Y2 - 19 July 2011 through 22 July 2011
ER -