Magnetic circuit system with enhanced initial electromagnetic attraction and high-voltage DC relay

A magnetic circuit system with enhanced initial electromagnetic attraction, comprising:

• a movable magnetizer and a stationary magnetizer;
• the movable magnetizer and the stationary magnetizer being respectively provided at a suitable position, so that a magnetic pole surface of the movable magnetizer and a magnetic pole surface of the stationary magnetizer are in opposite positions with preset magnetic gaps, two magnetic pole surfaces correspondingly matched with each other are respectively in a ring shape and respectively has an inner ring and an outer ring;
• a coil, being provided at an adaptive position, so that the movable magnetizer moves towards the stationary magnetizer when the coil is energized;
• a reset spring, the reset spring is adapted between an intermediate portion of the movable magnetizer and an intermediate portion of the stationary magnetizer;
• wherein one of the two magnetic pole surfaces correspondingly matched with each other is provided with a protrusion protruding to the other magnetic pole surface, and a recess is provided in the other magnetic pole surface at a position corresponding to the protrusion, where the protrusion can be embedded into the recess when the movable magnetizer and the stationary magnetizer are attracted with each other;
• each of the protrusion and the recess has distances from the inner ring and the outer ring of corresponding magnetic pole surfaces;
• when the coil is energized, a direction of a resultant force of attractive forces between the protrusion and the recess generated on both sides of a vertical section in which the protrusion and the recess are matched with each other is always along a direction in which the movable magnetizer moves to the stationary magnetizer, and the protrusion is utilized to reduce a magnetic gap between the two magnetic pole surfaces at the protrusion, thereby reducing magnetic resistance and increasing initial electromagnetic attraction.