Abstract: In order to solve the problem of frequency vibration in the dynamic and static iron core of the contactor, the contactor AC electromagnetic system usually adds a short circuit ring to the core. In this paper, the role and working principle of the core short-circuit ring of the contactor AC electromagnetic system are introduced, and the influence of the structural parameters of the short-circuit ring on the minimum and average suction of the core is analyzed. The influence of the phase difference between the internal and external magnetic flux of the short circuit ring on the performance of the short circuit ring is emphatically expounded, and the method of determining the comprehensive parameters of the short circuit ring based on the magnetic flux phase difference is given, and the theoretical demonstration is carried out through numerical calculation, and the effectiveness of the design method is proved by the actual development and application of contactor.

    Key words: short circuit ring; noise; minimal suction; magnetic flux phase difference; short circuit ring comprehensive factor; lag superposition