GROUND LEAKAGE POWER SUPPLY FOR DIMMING APPLICATIONS
First Claim
Patent Images
1. A dimmer for controlling power to a load, the dimmer comprising:
- a phase input terminal configured to couple to an AC power source for powering the load;
a ground terminal configured to couple to a ground connection;
a load output terminal configured to couple to the load for supplying power thereto;
a controller for controlling a switching circuit electrically coupled between the line input terminal and the load output terminal to control supply of power to the load; and
a power supply comprising a ground leakage power supply configured to derive power from a connection of the dimmer to the ground terminal, the ground leakage power supply comprising a switching-mode power supply, wherein the ground leakage power supply is configured to power operation of the dimmer including operation of the controller.
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Abstract
A dimmer is provided for controlling power to a load, the dimmer having a ground leakage power supply deriving power from a connection of the dimmer to ground. The power supply may be a switching-mode power supply that can be the sole or primary power supply to power operation of the dimmer, including operation of the controller.
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Citations
17 Claims
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1. A dimmer for controlling power to a load, the dimmer comprising:
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a phase input terminal configured to couple to an AC power source for powering the load; a ground terminal configured to couple to a ground connection; a load output terminal configured to couple to the load for supplying power thereto; a controller for controlling a switching circuit electrically coupled between the line input terminal and the load output terminal to control supply of power to the load; and a power supply comprising a ground leakage power supply configured to derive power from a connection of the dimmer to the ground terminal, the ground leakage power supply comprising a switching-mode power supply, wherein the ground leakage power supply is configured to power operation of the dimmer including operation of the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A dimmer for controlling power to a load, the dimmer comprising:
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a phase input terminal configured to couple to an AC power source for powering the load; a ground terminal configured to couple to a ground connection; a load output terminal configured to couple to the load for supplying power thereto; a controller for controlling a switching circuit electrically coupled between the line input terminal and the load output terminal to control supply of power to the load, wherein the controller is configured to provide a signal to the switching circuit to provide power to the load, the signal provided starting at a firing angle of a half-cycle of the AC power source, and the signal comprising a plurality of pulses provided during the half-cycle of the AC power source; and a power supply comprising a ground leakage power supply configured to derive power from a connection of the dimmer to the ground terminal, the ground leakage power supply comprising a switching-mode power supply, wherein the ground leakage power supply is configured to power operation of the dimmer including operation of the controller to provide the signal. - View Dependent Claims (15, 16)
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17. A dimmer for controlling power to a load, the dimmer comprising:
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a phase input terminal configured to couple to an AC power source for powering the load; a ground terminal configured to couple to a ground connection; a load output terminal configured to couple to the load for supplying power thereto; a controller for controlling a switching circuit electrically coupled between the line input terminal and the load output terminal to control supply of power to the load, wherein the controller is configured to provide a signal to the switching circuit to provide power to the load, the signal comprising a plurality of pulses provided during the half-cycle of the AC power source, and the plurality of pulses having a duration of 8-12 microseconds and having a duration therebetween of 8-12 microseconds; and a power supply comprising a ground leakage power supply configured to derive power from a connection of the dimmer to the ground terminal, the ground leakage power supply comprising a switching-mode power supply, wherein the ground leakage power supply is configured to power operation of the dimmer including operation of the controller to provide the signal.
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Specification