公开(公告)号：US20180286613A1

公开(公告)日：2018-10-04

申请号：US15997328

申请日：2018-06-04

Applicant: Lutron Electronics Co., Inc.

Inventor： Robert W. Lenig ,  Michael Sizemore ,  Joshua W. Thaler ,  Russell L. MacAdam

IPC: H01H47/18

CPC classification number: H01H47/18 ,  H01H9/56

Abstract: A load control device may control power delivered to an electrical load from an AC power source. The load control device may include a controllably conductive device adapted to be coupled in series electrical connection between the AC power source and the electrical load, a zero-cross detect circuit configured to generate a zero-cross signal representative of the zero-crossings of an AC voltage. The zero-cross signal may be characterized by pulses occurring in time with the zero-crossings of the AC voltage. The load control device may include a control circuit operatively coupled to the controllably conductive device and the zero cross detect circuit. The control circuit may be configured to identify a rising-edge time and a falling-edge time of one of the pulses of the zero-cross signal, and may control a conductive state of the controllably conductive device based on the rising-edge time and the falling-edge time of the pulse.

公开(公告)号：US10424451B2

公开(公告)日：2019-09-24

申请号：US15997328

申请日：2018-06-04

Applicant: Lutron Electronics Co., Inc.

Inventor： Robert W. Lenig ,  Michael Sizemore ,  Joshua W. Thaler ,  Russell L. MacAdam

IPC: H01H47/18 ,  H01H9/56

Abstract: A load control device may control power delivered to an electrical load from an AC power source. The load control device may include a controllably conductive device adapted to be coupled in series electrical connection between the AC power source and the electrical load, a zero-cross detect circuit configured to generate a zero-cross signal representative of the zero-crossings of an AC voltage. The zero-cross signal may be characterized by pulses occurring in time with the zero-crossings of the AC voltage. The load control device may include a control circuit operatively coupled to the controllably conductive device and the zero cross detect circuit. The control circuit may be configured to identify a rising-edge time and a falling-edge time of one of the pulses of the zero-cross signal, and may control a conductive state of the controllably conductive device based on the rising-edge time and the falling-edge time of the pulse.