An Electromagnetically Actuated Vacuum Circuit Breaker Developed by Electromagnetic Analysis Coupled with Motion
| Autor: | Takafumi Nakagawa, Mitsuru Tsukima, Toshie Takeuchi, Tomotaka Yano, Kenichi Koyama, Nobumoto Tohya |
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| Rok vydání: | 2004 |
| Předmět: |
Engineering
Synchronous circuit business.industry Phase (waves) Electrical engineering Energy Engineering and Power Technology law.invention Control theory Electromagnetic coil law Eddy current High Energy Physics::Experiment Transient (oscillation) Electrical and Electronic Engineering business Actuator Circuit breaker Energy (signal processing) |
| Zdroj: | IEEJ Transactions on Power and Energy. 124:321-326 |
| ISSN: | 1348-8147 0385-4213 |
| DOI: | 10.1541/ieejpes.124.321 |
| Popis: | A new electromagnetically actuated vacuum circuit breaker (VCB) has been designed and developed on the basis of the transient electromagnetic analysis coupled with motion. The VCB has three advanced bi-stable electromagnetic actuators, which control each phase independently. The VCB serves as a synchronous circuit breaker as well as a standard circuit breaker. In this work, the flux delay due to the eddy current is analytically formulated using the delay time constant of the actuator coil current, thereby leading to accurate driving behavior. With this analytical method, the electromagnetic mechanism for a 24kV rated VCB has been optimized; and as a result, the driving energy is reduced to one fifth of that of a conventional VCB employing spring mechanism, and the number of parts is significantly decreased. Therefore, the developed VCB becomes compact, highly reliable and highly durable. |
| Databáze: | OpenAIRE |
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