Power contractor with high mechanic shock resistance
A power contactor having an electromagnetic driving unit, a rotating armature, and a reset element. The rotating armature is switched by the electromagnetic driving unit between an open position and a closed position. The reset element exerts a reset force onto the rotating armature when in the closed position.
1. A power contactor, comprising:
an electromagnetic driving unit;
a rotating armature switched by the electromagnetic driving unit between an open position and a closed position, a rotation angle of the rotating armature in the open position is greater than a rotation angle of the rotating armature in the closed position, the rotating armature is rotatable about a rotational axis extending through a center of gravity of the rotating armature; and
a reset element exerting a reset force onto the rotating armature when in the closed position.
2. The power contactor according to claim 1 , further comprising a yoke connected to the electromagnetic driving unit.
3. The power contactor according to claim 2 , wherein the yoke includes a yoke base and a pair of yoke legs extending from opposite ends of the yoke base.
4. The power contactor according to claim 3 , wherein:
(a) each yoke leg has a pole face on an end portion thereof, and
(b) the rotating armature is between the pole faces.
5. The power contactor according to claim 4 , wherein the electromagnetic driving unit includes a coil wound about the yoke base.
6. The power contactor according to claim 4 , wherein the yoke has a switch receiving space between the end portions of the yoke legs in which the rotating armature is positioned.
7. The power contactor according to claim 6 , wherein the rotating armature includes a permanent magnet and an armature plate secured to the permanent magnet.
8. The power contactor according to claim 7 , wherein the rotating armature includes a pair of stops, one of the pair of stops abutting the rotating armature when positioned in the open position.
9. The power contactor according to claim 8 , wherein the other of the pair of stops abuts the rotating armature when positioned in the closed position.
10. The power contactor according to claim 9 , wherein the rotational axis of the rotating armature crosses the rotating armature between the pole faces.
11. The power contactor according to 10 , wherein the armature plate extends toward the pair of yoke legs.
12. The power contactor according to 11 , wherein the armature plate extends beyond the switch receiving space.
13. The power contactor according to claim 2 , further comprising a spacing element positioned between the yoke and the rotating armature.
14. The power contactor according to claim 1 , wherein the reset element exerts a reset force onto the rotating armature towards the open position when the rotating armature is an intermediate position.
15. The power contactor according to claim 1 , further including a contact bridge to which the rotating armature is hingedly connected.
16. The power contactor according to claim 15 , wherein the reset element is positioned in the contact bridge.
17. A power contactor, comprising:
an electromagnetic driving unit;
a rotating armature switched by the electromagnetic driving unit between an open position and a closed position, the rotating armature is rotatable about a rotational axis extending through a center of gravity of the rotating armature, the rotating armature includes a permanent magnet and an armature plate secured to the permanent magnet;
a reset element exerting a reset force onto the rotating armature when in the closed position;
a yoke connected to the electromagnetic driving unit, the yoke includes a yoke base and a pair of yoke legs extending from opposite ends of the yoke base, each yoke leg has a pole face on an end portion thereof the rotating armature is between the pole faces, the yoke has a switch receiving space between the end portions of the yoke legs in which the rotating armature is positioned, the rotating armature includes a pair of stops, one of the pair of stops abutting the yoke when positioned in the open position and the other of the pair of stops abuts the yoke when positioned in the closed position, the rotational axis of the rotating armature crosses the rotating armature between the pole faces, the armature plate extends toward the pair of yoke legs and beyond the switch receiving space; and
a spacing element positioned between the yoke and the rotating armature, a rotation angle of the rotating armature in the open position is greater than a rotation angle of the rotating armature in the closed position.
18. The power contactor according to claim 17 , wherein the reset element exerts a reset force onto the rotating armature towards the open position when the rotating armature is an intermediate position.
19. A power contactor, comprising:
an electromagnetic driving unit;
a rotating armature switched by the electromagnetic driving unit between an open position and a closed position, a rotation angle of the rotating armature in the open position is greater than a rotation angle of the rotating armature in the closed position;
a reset element exerting a reset force onto the rotating armature when in the closed position; and
a contact bridge to which the rotating armature is hingedly connected.
20. The power contactor according to claim 19 , wherein the reset element is positioned in the contact bridge.