Design and Analysis of a New Permanent Magnet Actuator for Medium Voltage Vacuum Circuit Breakers

Abstract

This paper proposes a bi-stable permanent magnetic actuator (PMA) for medium voltage vacuum circuit breaker. The structure of the proposed PMA is discussed and the optimization of the structure is carried out. The model of finite element analysis (FEA) is constructed where the flux distributions, electromagnetic force under different structure parameters are analyzed. The feasibility and correctness of the PMA are verified by the FEA simulation results and the optimal size for movable plunger and stationary iron ring is obtained.

Ultra‐fast moving coil actuator for power switches in medium‐voltage grids

“…Another actuation principle uses electrodynamic drives with moving magnets, e.g. tubular PM actuators [6] or rotatory motors [7]. Those actuators reach times <10 ms.…”

Comparison Study of Tubular Linear Surface-Mounted Permanent Magnet Actuator with Different Fractional Slot Winding

“…Recently, more and more attentions are focused on linear motors due to their characteristics that they can directly transform electricity energy into linear motion, among them tubular linear motors are widely used as launchers for space-use, and used in industry robots [1][2][3]. In another occasion, they are also applied as the high voltage breaker actuators for their direct thrust force and high reliability [4][5]. To design a tubular linear surface-mounted motors (TLSPM) used as actuators fitting for this application, a suitable slot/pole combination where certain winding type related should be considered to achieve good performance, such as low detent force, low cost, low power loss, high force density and so on [6][7][8][9][10].…”

Challenges of Dynamic Simulation of High-Speed Electromagnetic Valves of Gas Distribution Devices

“…The basis of such techniques is mathematical computer codes aimed at solving the problems of electromagnetic fields calculations. In gas distribution valves, armor electromagnets with penetrating armature are usually used, which with a high degree of adequacy can be considered as 2D axisymmetrical objects in a cylindrical coordinate system [5,6], which greatly simplifies the technique and speeds up the calculation.…”

“…A(r , z)| t = 0 = A(r , z, 0) = 0. (6) To obtain a solution to the system of equations (3)- (5), it is also necessary to formulate conditions at the boundaries of the calculation domain. A natural geometric boundary is the axis of symmetry, at which the magnetic vector potential is zero.…”

“…When solving the system of equations (2)-(4), (7), taking into account dependence (8), zero boundary conditions (initial conditions (5) and conditions (6) on the boundary of the calculation domain) are used for the azimuthal component of the magnetic vector potential, and for the current i in the winding zero initial condition should be set:…”