Electromagnetic relay with decreasing hold power requirement
AssigneeOMRON Corporation
InventorKeisuke Murata
Life of this patent
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Abstract
An electromagnet device includes an electromagnetic coil and a capacitor. The electromagnetic coil includes a first coil and a second coil connected in parallel to the first coil. The capacitor is connected to the second coil and configured to be charged by a voltage applied to the electromagnetic coil. Upon application of the voltage to the electromagnetic coil, the first coil and the second coil are turned from a non-conducting state to a conducting state. Upon completion of a charging of the capacitor by the application of the voltage to the electromagnetic coil, a current flow into the second coil will have ceased, and the second coil will have changed from the conducting state into the non-conducting state.
Claims11
An electromagnetic relay comprising:
- a contact device;
- and
- an electromagnet device configured to drive the contact device by electromagnetic force, the electromagnet device comprising,
- an electromagnetic coil assembly including a first coil and a second coil connected in parallel to the first coil;
- and
- a capacitor connected to the second coil and arranged to be charged by a voltage applied to the electromagnetic coil assembly, wherein
- upon application of the voltage to the electromagnetic coil assembly, the first coil and the second coil are turned from a non-conducting state to a conducting state,
- upon completion of a charging of the capacitor by the application of the voltage to the electromagnetic coil assembly, a current flow into the second coil ceases and the second coil will have changed from the conducting state into the non-conducting state, and
- a power consumption of the first coil is lower than a power consumption of the second coil.
Dependencies are inferred from the claim text.