Electromagnetic relay
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYosuke Shimizu, Masakazu Kobayashi, Shinya Kimoto, Riichi Uotome
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Abstract
An electromagnetic relay includes an electromagnet device, a contact device, and a trip device. The electromagnet device includes a first stator, a movable element, and a first exciting coil. The contact device includes a movable contact and a fixed contact. A trip device includes a second exciting coil. The electromagnet device moves the movable element from a first position to a second position. The trip device moves the movable element to a third position. An open state is reached when the movable element is in the first position and the third position. A closed state is reached when the movable element is in the movable element is in the second position.
Claims27
An electromagnetic relay comprising:
- an electromagnet device including:
- a first stator;
- a movable element disposed facing the first stator;
- and
- a first exciting coil wound around at least a part of the first stator,
- wherein when the first exciting coil is energized, the electromagnet device attracts the movable element to the first stator by first magnetic flux generated by the first exciting coil, and moves the movable element from a first position to a second position;
- a contact device including:
- a movable contact disposed on an opposite side to the movable element with respect to the first stator, and linked to the movable element;
- and
- a fixed contact disposed facing the movable contact;
- and
- a trip device including a second exciting coil coupled to the contact device, and disposed on an opposite side to the contact device with respect to the electromagnet device,
- wherein when not less than a prescribed value of electric current flows in the contact device in a state in which the movable element is in the second position, the trip device moves the movable element to a third position by a second magnetic flux generated by the second exciting coil,
- wherein when the movable element is in the first position and the third position, the movable contact and the fixed contact are away from each other to form an open state, and
- when the movable element is in the second position, the movable contact and the fixed contact are brought into contact with each other to form a closed state.
Dependencies are inferred from the claim text.