Electrical contactor
AssigneeJohnson Electric S.A.
InventorRichard Anthony Connell
Life of this patent
Estimating the term…
Abstract
An electrical contactor for switching a load current having an AC waveform, has a fixed electrical contact, a movable electrical contact, an actuator arrangement having a drive coil drivable for opening and closing the movable and fixed electrical contacts, and a power supply having a controller for outputting truncated-waveform drive pulses to the electrical actuator arrangement, so as to prevent contact separation prior to peak load current.
Claims13
An electrical contactor comprising:
- a fixed electrical contact, a movable electrical contact, an electrical actuator having a drive coil drivable for opening and closing the movable and fixed electrical contacts, and a power supply having a controller for outputting truncated-waveform drive pulses to the electrical actuator arrangement, so as to prevent contact separation prior to peak load current.
A method of limiting or preventing electrical contact bounce and arc duration, the method comprising the step of driving an electrical actuator to open and close electrical contacts of an electrical contactor, a drive pulse being applied to drive the electrical actuator having a truncated-waveform.
A method of controlling electrical contact closing and opening delay, the method comprising the step of driving an electrical actuator to open and close electrical contacts of an electrical contactor, a drive pulse being applied to drive the electrical actuator having a truncated-waveform.
Dependencies are inferred from the claim text.