Optimization of the Switch Mechanism in a Circuit Breaker Using MBD Based Simulation.
A circuit breaker is widely used to protect electric power system from fault currents or system errors; in particular, the opening mechanism in a circuit breaker is important to protect current overflow in the electric system. In this paper, multibody dynamic model of a circuit breaker including switch mechanism was developed including the electromagnetic actuator system. Since the opening mechanism operates sequentially, optimization of the switch mechanism was carried out to improve the current breaking time. In the optimization process, design parameters were selected from length and shape of each latch, which changes pivot points of bearings to shorten the breaking time. To validate optimization results, computational results were compared to physical tests with a high speed camera. Opening time of the optimized mechanism was decreased by 2.3 ms, which was proved by experiments. Switch mechanism design process can be improved including contact-latch system by using this process.
School of Mechanical Engineering, Pusan National University, Busan 609-735, Republic of Korea.
Jin-Seok
JS
Jang
School of Mechanical Engineering, Pusan National University, Busan 609-735, Republic of Korea.
Chang-Gyu
CG
Yoon
Agency for Defense Development, P.O. Box 126, Changwon, Gyeongnam 641-836, Republic of Korea.
Chi-Young
CY
Ryu
Hyosung Corporation, Changwon 641-712, Republic of Korea.
Hyun-Woo
HW
Kim
Hyosung Corporation, Changwon 641-712, Republic of Korea.
Byung-Tae
BT
Bae
Faculty of Mechanical Engineering, Pusan National University, Busan 609-735, Republic of Korea.
Wan-Suk
WS
Yoo