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1. 发明公开

US20240032162A1 PREDICTION AND RECOVERY OF ZERO-CROSSING INFORMATION AND SELECTIVE CONTROL SIGNAL PULSE DURATION 审中-公开
公开(公告)号：US20240032162A1
公开(公告)日：2024-01-25
申请号：US18477646
申请日：2023-09-29
申请人： Leviton Manufacturing Co., Inc.
发明人： Ankit Milan SANGHVI , Abhishek D. GOLWALA , A. M. Sarwar JAHAN
IPC分类号： H05B45/14 , H05B47/16 , H05B45/325
CPC分类号： H05B45/14 , H05B47/16 , H05B45/325
摘要： Operating an electrical load controller includes determining a firing angle at which to fire a switching circuit of the electrical load controller, the firing angle corresponding to a firing delay time. In some aspects, the operating includes selecting a control signal pulse duration between a fixed duration and a variable duration, and controlling the supply of AC power to the load based on the selected control signal pulse duration. In some aspects, the operating includes detecting whether a voltage sag is present in the AC waveform and the selecting is based on determining that voltage sag is present in the AC waveform.

2. 发明公开

US20240373522A1 PREDICTION AND RECOVERY OF ZERO-CROSSING INFORMATION AND SELECTIVE CONTROL SIGNAL PULSE DURATION 审中-公开
公开(公告)号：US20240373522A1
公开(公告)日：2024-11-07
申请号：US18768194
申请日：2024-07-10
申请人： Leviton Manufacturing Co., Inc.
发明人： Ankit Milan SANGHVI , Abhishek D. GOLWALA , A. M. Sarwar JAHAN
IPC分类号： H05B45/14 , H05B45/325 , H05B47/16
CPC分类号： H05B45/14 , H05B45/325 , H05B47/16
摘要： Operating an electrical load controller includes determining a firing angle at which to fire a switching circuit of the electrical load controller and selecting a control signal pulse duration between a fixed duration and a variable duration based on the firing angle and on whether voltage sag is present in an alternating current (AC) waveform, then controlling a supply of AC power to a load based on the selected duration. An electrical load controller and method of operating such is also provided, in which a detection window is selected for detecting zero-crossings (ZC) of an AC waveform, a ZC signal is monitored and a time of a next ZC is ascertained, and a supply of AC power to a load is controlled using the ascertained time.

3. 发明申请

US20220171355A1 LOAD CONTROL WITH INTEGRAL CONTROL INTERFACE 有权
公开(公告)号：US20220171355A1
公开(公告)日：2022-06-02
申请号：US17483992
申请日：2021-09-24
申请人： Leviton Manufacturing Co., Inc.
发明人： A.M. Sarwar JAHAN , Abhishek D. GOLWALA , Ankit Milan SANGHVI , Abrar QUAZI , Michael ROSS
IPC分类号： G05B19/042 , G08B5/22
摘要： A load control is provided which includes a wall-box mounted housing, an electrical device to control electrical power to a load, and a control assembly to control the electrical device. The control assembly includes a user-programmable control, with a saved settings data structure having multiple columns and rows of control settings, and a control interface with first and second button switches to selectively advance through the columns and rows of the settings data structure in a settings mode of the control. The button switches are selectable by a user without disassembly of the load control, and the control interface also includes one or more indicator devices to signal a column of the settings data structure to which the control has been advanced in the settings mode of the control, and to signal a row of the settings data structure to which the control has been advanced.

4. 发明公开

US20240053716A1 LOAD CONTROL WITH INTEGRAL CONTROL INTERFACE 审中-公开
公开(公告)号：US20240053716A1
公开(公告)日：2024-02-15
申请号：US18487303
申请日：2023-10-16
申请人： Leviton Manufacturing Co., Inc.
发明人： A.M. Sarwar JAHAN , Abhishek D. GOLWALA , Ankit Milan SANGHVI , Abrar QUAZI , Michael ROSS
IPC分类号： G05B19/042 , G08B5/22
CPC分类号： G05B19/042 , G08B5/22 , G05B2219/2639 , G06F3/0202
摘要： A load control is provided which includes a wall-box housing, an electrical device to control electrical power to a load, a controller to control the electrical device, and a control interface. The controller is user-programmable and includes a saved settings data structure having multiple columns and rows of control settings. The control interface has first and second button switches to respectively select a column and row of the settings data structure in a settings mode of the controller. The button switches include respective electro-mechanical devices and are selectable by a user without disassembly of the load control. The control interface also includes one or more light indicators to signal the selected column of the settings data structure in the settings mode of the control, and to differently signal the selected row of the settings data structure.

5. 发明申请

US20210368598A1 PREDICTION AND RECOVERY OF ZERO-CROSSING INFORMATION AND SELECTIVE CONTROL SIGNAL PULSE DURATION 有权
公开(公告)号：US20210368598A1
公开(公告)日：2021-11-25
申请号：US17058876
申请日：2020-11-13
申请人： Leviton Manufacturing Co., Inc.
发明人： Ankit Milan SANGHVI , Abhishek D. GOLWALA , A. M. Sarwar JAHAN
IPC分类号： H05B45/14 , H05B45/325 , H05B47/16
摘要： Operating an electrical load controller includes, in one aspect, predetermining a duration of time based at least in part on a frequency of an alternating current (AC) waveform, the alternating current (AC) waveform oscillating though full cycles, each full cycle comprising a positive half cycle and a negative half cycle; selecting a detection window of time equal in duration to the predetermined duration of time, the selected detection window extending from a selected first time to a selected second time and straddling an expected time of a next zero-crossing of the AC waveform; monitoring a zero-crossing signal for a zero-crossing indication, of the next zero-crossing, occurring within the selected detection window; ascertaining a time of the next zero-crossing based on the monitoring; and selectively controlling a supply of AC power to a load, wherein the controlling uses the ascertained time of the next zero-crossing of the AC waveform to fire a switching circuit of the electrical load controller. Additionally or alternatively, operating an electrical load controller includes, based on a desired load level setting of the electrical load controller, determining a firing angle, of an alternating current (AC) waveform, at which to fire a switching circuit of the electrical load controller to selectively control the switching circuit to conduct a supply of AC power to a load, the firing angle corresponding to a firing delay time, after zero-crossings of the AC waveform, at which to fire the switching circuit; selecting a control signal pulse duration, the control signal pulse duration being a duration of time for a control signal to be held in an ON state to latch the switching circuit to conduct the supply of AC power to the load, wherein the selecting the control signal pulse duration comprises selecting, for the control signal pulse duration, and based on the determined firing angle, between: (i) a fixed duration of time that begins at the firing delay time and ends after the fixed duration of time; and (ii) a variable duration of time that begins at the firing delay time and ends at a preset unlatch time of the AC waveform; and controlling the supply of AC power to the load based on the selected control signal pulse duration, wherein the controlling holds the control signal in the ON state for the selected control signal pulse duration in selectively controlling the switching circuit to conduct the supply of AC power to the load. Alternatively, in some aspects, operating an electrical load controller includes based on a desired load level setting of the electrical load controller, determining a firing angle, of an alternating current (AC) waveform, at which to fire a switching circuit of the electrical load controller to selectively control the switching circuit to conduct a supply of AC power to a load, the firing angle corresponding to a firing delay time, after zero-crossings of the AC waveform, at which to fire the switching circuit; detecting whether a voltage sag is present in the AC waveform; selecting a control signal pulse duration, the control signal pulse duration being a duration of time for a control signal to be held in an ON state to latch the switching circuit to conduct the supply of AC power to the load, wherein the selecting the control signal pulse duration comprises selecting, for the control signal pulse duration, and based on the determined firing angle, between: (i) a fixed duration of time that begins at the firing delay time and ends after the fixed duration of time; and (ii) a variable duration of time; wherein the selecting is based further on determining that the firing delay time is less than a first threshold delay, and on the detecting whether the voltage sag is present in the AC waveform; and controlling the supply of AC power to the load based on the selected control signal pulse duration, wherein the controlling holds the control signal in the ON state for the selected control signal pulse duration in selectively controlling the switching circuit to conduct the supply of AC power to the load.

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