Power supply for a two-wire smart switch and lighting loads thereof
First Claim
1. A power supply powered by main electricity for a two-wire or three-wire smart switch, connected to at least one lighting load, to control the power on and power off of the at least one lighting load, the power supply comprises:
- a first low power module;
a second low power module;
a third low power module;
a high power module;
a current sensing module;
a low power lighting load adapter;
wherein;
if the smart switch has a two-wire configuration and a first one of the least one lighting load is a low power lighting load, the low power lighting load adapter is connected in parallel to the first one of the at least one lighting load and AC power from the main electricity will flow from the first one of the at least one lighting load and the low power lighting load adapter to the low power module when the first one of the least one lighting load is in an off state;
if the smart switch has a two-wire configuration and the first one of the at least one lighting load is not a low power lighting load, the low power lighting load adapter is not connected to the first one of the at least one lighting load and the AC power will flow from the first one of the at least one lighting load to the low power module when the first one of the at least one lighting load is in an off state,if the smart switch has a three-wire configuration, the AC power will flow from a neutral and a phase wires to the first low power module;
the first low power module converts the AC power from the main electricity into a first level DC voltage and outputs the first level DC voltage to the second low power module;
the second low power module converts the first level DC voltage from the first low power module into a second level DC voltage when the first one of the at least one lighting load is in an off state;
the high power module turns on the at least one lighting load, when a respective one of at least one activation signal is received from an external controller module that is powered by the second low level DC voltage, and a shunt current flows out of the high power module when the at least one lighting load is in an on state;
the third low power module receives the shunt current and uses it to output the first level DC voltage to the second low power module when the first one of the at least one lighting load is in an on state;
the second low power module converts the first level DC voltage from the third low power module into a second level DC voltage when the first one of the at least one lighting load is in an on state;
the current sensing module is powered by the second level DC voltage and converts the shunt current from the high power module into a current-voltage signal to be outputted to the external controller module.
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Accused Products
Abstract
The present invention refers to an Electrical Power System (EPS) or Power Supply for a smart switch for controlling up to three independent lighting loads (3 gang) within an electrical installation that has two or three wires in the switch box (two-wire and three-wire switches). The smart switch is able to operate in a conventional switch box without access to the neutral wire. If the lighting device is a low power lighting device, only one adapter is used to avoid flickering or unintentional lighting. The Power Supply also provides a voltage signal indicating the current consumed by the lighting loads.
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Citations
21 Claims
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1. A power supply powered by main electricity for a two-wire or three-wire smart switch, connected to at least one lighting load, to control the power on and power off of the at least one lighting load, the power supply comprises:
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a first low power module; a second low power module; a third low power module; a high power module; a current sensing module; a low power lighting load adapter; wherein; if the smart switch has a two-wire configuration and a first one of the least one lighting load is a low power lighting load, the low power lighting load adapter is connected in parallel to the first one of the at least one lighting load and AC power from the main electricity will flow from the first one of the at least one lighting load and the low power lighting load adapter to the low power module when the first one of the least one lighting load is in an off state; if the smart switch has a two-wire configuration and the first one of the at least one lighting load is not a low power lighting load, the low power lighting load adapter is not connected to the first one of the at least one lighting load and the AC power will flow from the first one of the at least one lighting load to the low power module when the first one of the at least one lighting load is in an off state, if the smart switch has a three-wire configuration, the AC power will flow from a neutral and a phase wires to the first low power module; the first low power module converts the AC power from the main electricity into a first level DC voltage and outputs the first level DC voltage to the second low power module; the second low power module converts the first level DC voltage from the first low power module into a second level DC voltage when the first one of the at least one lighting load is in an off state; the high power module turns on the at least one lighting load, when a respective one of at least one activation signal is received from an external controller module that is powered by the second low level DC voltage, and a shunt current flows out of the high power module when the at least one lighting load is in an on state; the third low power module receives the shunt current and uses it to output the first level DC voltage to the second low power module when the first one of the at least one lighting load is in an on state; the second low power module converts the first level DC voltage from the third low power module into a second level DC voltage when the first one of the at least one lighting load is in an on state; the current sensing module is powered by the second level DC voltage and converts the shunt current from the high power module into a current-voltage signal to be outputted to the external controller module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power supply powered by main electricity for a two-wire or three-wire smart switch, connected to at least one lighting load, to control the power on and power off of the at least one lighting load, the power supply comprises:
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a low power module; a high power module; a current sensing module; a low power lighting load adapter; a zero detection crossing module; wherein; if the smart switch has a two-wire configuration and a first one of the least one lighting load is a low power lighting load, the low power lighting load adapter is connected in parallel to the first one of the at least one lighting load and AC power from the main electricity will flow from the first one of the at least one lighting load and the low power lighting load adapter to the low power module when the first one of the least one lighting load is in an off state; if the smart switch has a two-wire configuration and the first one of the at least one lighting load is not a low power lighting load, the low power lighting load adapter is not connected to the first one of the at least one lighting load and the AC power will flow from the first one of the at least one lighting load to the low power module when the first one of the at least one lighting load is in an off state; if the smart switch has a three-wire configuration, the AC power will flow from a neutral and a phase wire of the main electricity to the low power module; the low power module converts the AC power from the main electricity into a low level DC voltage; the high power module turns on the at least one lighting load for less than a half cycle of the main electricity, when a respective one of at least one activation signal is received from an external controller module that is powered by the low level DC voltage, and a shunt current flows out of the high power module when the at least one lighting load is in an on state; the zero crossing module outputs a zero crossing signal to the external controller module when a wave of the AC main voltage crosses zero volts, for the external controller module to synchronize the timing and delay of the activation signal with the phase of the main electricity; the current sensing module is powered by the low level DC voltage and converts the shunt current from the high power module into a current-voltage signal to be outputted to the external controller module; and the low power module, the high power module, the current sensing module and the zero crossing detecting module are galvanically isolated from the main electricity. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification