Measure to Reduce the Bounce of a Movable Part in an Electromagnetic Contactor

This study considered the measure for bouncing produced on the movable part of an electromagnetic contactor during return. For this purpose, the way of thinking of a dynamic vibration absorber was applied to the collision problem. The results obtained are as follows. (1) The crossbar bounces approximately 3 mm after colliding twice against the housing. (2) Inserting pieces of urethane rubber (AC-6ME material) between the movable core and the crossbar under some conditions reduced the bounce to about one third. (3) This is due to a remarkable hysteresis characteristic of AC-6ME material seen under its compressive deformation.