Dynamic Characteristic Analysis of Electric Actuator for 1 kV/3.2 kA Air Circuit Breaker Based on the Three-link Structure

Abstract

-In the present paper, a new type of electrical actuator, an electromagnetic force driving actuator (EMFA), applicable to air circuit breaker is developed and analyzed. Transient analysis is performed to obtain the dynamic characteristics of EMFA. The distribution of static magnetic flux is obtained using the finite element method. The coupled problems of electrics and mechanics governing equations are solved using the time-difference method. According to the interception rate of each contactor, investigation of the contactor spring load condition is conducted and applied to the threelink system. Comparisons of the dynamic characteristics of the three-link simulation and experimental data are performed.

Characteristic analysis and design of a novel permanent magnetic actuator for a vacuum circuit breaker

“…The current and the time can be calculated by (15) and 16I n = I n−1 + dI n (15) time n = time n−1 + dt (16) The capacitor voltage will drop, as shown in (17). Directly after the power of the capacitor is turned off, the capacitor voltage will be maintained as (12)…”

“…The opening and closing holding forces of this PMA also could not be designed independently. We proposed the electromagnetic force driving actuator (EMFA) in the previous research as referred to [17, 18]. As the mover of EMFA is the coil and the Lorenz's force is used for the operation, the stroke of EMFA is not limited.…”

Optimal Design of a Novel Permanent Magnetic Actuator using Evolutionary Strategy Algorithm and Kriging Meta-model

“…Hence, the PMA has received much attention lately for the application of a circuit breaker [1][2][3][4]9]. Many researchers have been conducted the research on the PMA as reported in [1,2,[5][6][7][10][11][12][13][14][15][16][17] for several decades. The PMA requires a rare earth permanent magnet for high efficiency.…”