Patent ID: 11935719
Assignee: SILICONBRITE TECHNOLOGIES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. An AC switch system, comprising:
a latching relay coupled between a power line and a load;
a power switch controller configured to drive the latching relay and coupled with a latching relay coil via at least one coil output; and
a zero crossing detection resistor coupled between the power line and a power switch controller zero input;
a sense input of the power switch controller, sensing one or more predetermined conditions that cause the power switch controller to activate the latching relay by applying a first shaped pulse to a first coil terminal of the latching relay, and/or to deactivate the latching relay by applying a second shaped pulse to a second coil terminal of the latching relay, wherein:
the first shaped pulse and the second shaped pulse each have a duration shorter than 20 milliseconds;
the first shaped pulse and the second shaped pulse each have a maximum amplitude of at least 110% of a maximum sustained coil voltage; and
the first shaped pulse begins at least 50 milliseconds after a prior second shaped pulse has ended.