Patent ID: 11935714
Assignee: LUTRON TECHNOLOGY COMPANY LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. An electrical load control method, comprising:
determining, by control circuitry, a first zero cross time of an AC source voltage cycle using a zero-crossing detection signal that includes a first pulse having a rising edge time and a falling-edge time, the first pulse corresponding to a zero crossing of the AC source voltage;
determining, by the control circuitry, an actuation time to transition an operatively coupled controllably conductive device between two operating states, wherein the two operating states include a conductive state and a non-conductive operating state;
determining, by the control circuitry, an actuation adjustment time period based on a frequency of the AC source and the determined actuation time such that the transition of the controllably conductive device between operating states falls coincident with a zero crossing of an immediately subsequent AC source voltage cycle;
determining, by the control circuitry, an error window extending between a falling edge time of a pulse in the zero-crossing detection signal and a rising edge of an immediately subsequent pulse in the zero-crossing detection signal; and
generating, by the control circuitry, an output signal to cause the operatively coupled controllably conductive device to transition between the operating states using the determined actuation adjustment time period.