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Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 42-390
Full Name: Chi Chieh Tsung
Position: Professor
Age: ON
Sex: Male
Address: No. 1, Chieh Shou N. Rd., Changhua City, Taiwan
Country: TAIWAN
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E-mail address: jih@cc.ctu.edu.tw
Other E-mails: jih@ctu.edu.tw
Title of the Paper: A Contact De-bounce Technique for an AC Permanent Magnet Contactor
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Number of paper pages: 12
Abstract: This paper presents a new low-cost electronic control circuit actuator based on a microcontroller is proposed for minimizing the bouncing duration of an AC permanent magnet (PM) contactor after two mechanical contacts closing. The proposed new actuator overcomes the past bouncing problem of an uncontrollable restrictions imposed by previously conventional AC electromagnetic (EM) contactor. Systematically choosing an optimal closing phase angle of the coil voltage, the bouncing problems produced on EM contactor during the closing process are improved. Therefore, the using life of contactor contacts is then prolonged and their operating reliability is strengthened as well. To validate the feasibility of the proposed method, some simulation and experimental procedures were performed on a prototype of the proposed AC PM contactor in the laboratory. Testing results actually showed that bouncing duration of contactor¡¦s contacts after collision was reduced.
Keywords: AC permanent magnet contactor, AC electromagnetic contactor, Contact bounce, Cosing phase angle, Using life, Microcontroller
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