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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 52-287
Full Name: Chi Chieh Tsung
Position: Professor
Age: ON
Sex: Male
Address: No. 1, Chieh Shou N. Rd., Changhua City 500, Taiwan, R.O.C
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: Dynamic Stability Evaluation for an Electromagnetic Contactor
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Number of paper pages: 11
Abstract: This paper aims at researching the relationship between the dynamic stability of an electromagnetic contactor (abbreviated as contactor below) and the magnetic energy stored in the contactor. Explored contactors are in terms of an equivalent nonlinear and time-varying inductor and the basic characteristics of the contactor. Some special feature during closing phase and voltage sag events occurred through the definitions of passivity conditions theorem are found. By means of magnetic circuit analyzing method, a mathematic model and its numerical computer program of a contactor are first established in our laboratory. Some important experiments such as the dynamic stability of contactor during closing process and voltage-sag events are carried out by using this model. These simulation results are compared with the experimental results for validating the correctness of this contactor model. The final comparing results are in agreement with well. For purpose of further!
to know the voltage sensitivity of the experimental contactor, the CBEMA curves are used and obtained as well. Finally, the dynamic stability of the contactor during closing process and voltage sags is examined in terms of the energy stored by means of the simulation model to simulate and there are some very valuable results are obtained.
Keywords: CBEMA curve, passivity energy, contactor, voltage sag, dynamic stability
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