Power supply for a two-wire smart dimmer and lighting loads thereof
The present invention refers to an Electrical Power System (EPS) or Power Supply for a smart dimmer for controlling the intensity of illumination of a dimmable lighting load within an electrical installation that has two or three wires in the switch box (two-wire and three-wire switches). The Power Supply is able to detect and control different types of lighting technologies, such as incandescent or LED bulbs. The Power Supply also provides a voltage signal indicating the current consumed by the lighting loads.
1. A power supply for a two-wire or three-wire smart dimmer, to control the intensity of illumination of a lighting load powered by main electricity, the power supply comprises:
a first low power module;
a second low power module;
a high power module;
a current sensing module;
a zero crossing detecting module;
a controller module; and
a low power lighting load adapter;
wherein:
if the dimmer has a two-wire configuration and the lighting load is a low power lighting load, the low power lighting load adapter is connected in parallel to the lighting load and AC power flows from the low power lighting load and the low power lighting load adapter to the first low power module when the low power lighting load is in an off state;
if the dimmer has a two-wire configuration and the lighting load is not a low power lighting load, the low power lighting load adapter is not connected to the lighting load and the AC power flows from the lighting load to the first low power module when the low power lighting load is in an off state;
if the dimmer has a three-wire configuration, the AC power flows from a neutral and a phase wire to the first low power module;
the high power module turns on the lighting load for less than a half cycle of the main electricity, when an activation signal is received from the controller module, and a shunt current flows out of the high power module when the lighting load is in an on state that is fed 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;
the controller module performs forward phase or reverse phase control via the activation signal based on a dimming value inputted from a user and a zero crossing signal;
the zero crossing module outputs the zero crossing signal to the controller module when a wave of the AC main voltage crosses zero volts, in order to synchronize the timing and delay of the activation signal with the phase of the main electricity;
the first level DC voltage is inputted to the second low power module, wherein the first level DC voltage is converted to a second level DC voltage that powers components that allow for the functioning of the smart dimmer; and
the current sensing module is powered by the second level DC voltage and converts the shunt current from the lighting load into a current-voltage signal to be outputted to the controller module.
2. The power supply of claim 1 , wherein a power consumption of the lighting load is calculated based on the current-voltage signal.
3. The power supply of claim 1 , wherein a type of the lighting load is calculated based on the current-voltage signal.
4. The power supply of claim 1 , wherein a functioning anomaly of the lighting load is calculated based on the current-voltage signal.
5. The power supply of claim 1 , wherein the turning on of the lighting load for less than a half cycle of the main electricity is performed by a bidirectional semiconductor device.
6. The power supply of claim 1 , wherein the two-wire configuration consists of a phase wire and a wire from the lighting load.
7. The power supply of claim 1 , wherein the three-wire configuration consists of a phase wire, a neutral wire and a wire from the lighting load.
8. The power supply of claim 1 , wherein the first low power module comprises a selector switch to select between the two-wire or three-wire configurations.
9. The power supply of claim 1 , wherein the two-wire or three-wire configuration is automatically selected based on the current-voltage signal.
10. The power supply of claim 1 , wherein the lighting load is a resistive lighting load or an LED lighting load.
11. The power supply of claim 1 , wherein the low power lighting load adapter comprises one of a resistive adapter, a capacitive adapter, an inductive adapter or a combination thereof.
12. A power supply for a two-wire or three-wire smart dimmer, to control the intensity of illumination of a lighting load powered by main electricity, the power supply comprises:
a low power module;
a high power module;
a current sensing module;
a zero crossing detecting module;
a controller module; and
a low power lighting load adapter;
wherein:
if the dimmer has a two-wire configuration and the lighting load is a low power lighting load, the low power lighting load adapter is connected in parallel to the lighting load and AC power from the main electricity flows from the low power lighting load and the low power lighting load adapter to the first low power module when the low power lighting load is in an off state;
if the dimmer has a two-wire configuration and the lighting load is not a low power lighting load, the low power lighting load adapter is not connected to the lighting load and the AC power flows from the lighting load to the first low power module when the low power lighting load is in an off state;
if the dimmer has a three-wire configuration, the AC power flows from a neutral and a phase wire of the main electricity to the first low power module;
the high power module turns on the lighting load for less than a half cycle of the main electricity, when an activation signal is received from the controller module, and a load current flows out of the high power module when the lighting load is in an on state;
the first low power module converts the AC power from the main electricity into a low level DC voltage that powers the controller module, the current sensing module and the zero crossing detection module;
the controller module performs forward phase or reverse phase control via the activation signal based on a dimming value inputted from a user and a zero crossing signal;
the zero crossing module outputs the zero crossing signal to the controller module when a wave of the AC main voltage crosses zero volts, in order to synchronize the timing and delay of the activation signal with the phase of the main electricity;
the current sensing module converts the load current from the high power module into a current-voltage signal to be outputted to the controller module; and
the low power module, the high power module, the current sensing module, the zero crossing detecting module and the controller module are galvanically isolated from the main electricity.
13. The power supply of claim 12 , wherein a power consumption of the lighting load is calculated based on the current-voltage signal.
14. The power supply of claim 12 , wherein a type of the lighting load is calculated based on the current-voltage signal.
15. The power supply of claim 12 , wherein a functioning anomaly of the lighting load is calculated based on the current-voltage signal.
16. The power supply of claim 12 , wherein the turning on of the lighting load for less than a half cycle of the main electricity is performed by a bidirectional semiconductor device.
17. The power supply of claim 12 , wherein the two-wire configuration consists of a phase wire and a wire from the lighting load.
18. The power supply of claim 12 , wherein the three-wire configuration consists of a phase wire, a neutral wire and a wire from the lighting load.
19. The power supply of claim 17 , wherein an input selector automatically selects between the two-wire or three-wire configurations.
20. The power supply of claim 19 , wherein the two-wire or three-wire configuration is automatically selected based on the current-voltage signal.
21. The power supply of claim 12 , wherein the lighting load is a resistive lighting load or an LED lighting load.
22. The power supply of claim 12 , wherein the low power lighting load adapter comprises one of a resistive adapter, a capacitive adapter, an inductive adapter or a combination thereof.