Reversible-polarity wiring system
A system to control an electrical device, such as a lighting component or set of components. The system includes a set of connection lines, a power control module and a load interface component. The power control module is responsive to an alternating current source being connected to one of a first connection line and a second connection line to provide a regulated voltage signal output. A load interface component receives the regulated voltage signal output to control the electrical device.
1. A system to control an electrical device, the system comprising:
a set of connection lines, including a first connection line and a second connection line, either the first connection line or the second connection line being connectable to an alternating current source;
a power control module that is responsive to the alternating current source being connected to one of the first connection line and the second connection line to provide a regulated voltage signal output; and
a load interface component to receive the regulated voltage signal output, the load interface component being operable to control the electrical device.
2. The system of claim 1 , wherein the first connection line and the second connection line, when connected, have a reverse polarity.
3. The system of claim 2 , wherein the load interface component includes a dimmer circuit, and the electrical device is a light that is dimmable by the dimmer circuit.
4. The system of claim 3 , wherein the load interface component provides zero-crossing timing with an output to control the light.
5. The system of claim 1 , wherein the system is implemented as a light switch.
6. The system of claim 5 , further comprising a microcontroller to provide a programmable user-interface for the light switch.
7. The system of claim 6 , wherein the microcontroller drives the load interface component.
8. The system of claim 6 , wherein the microcontroller performs circuit power measurements for the load interface component.
9. The system of claim 1 , wherein the power control module rectifies the alternating current source provided to the one of the first or second connection lines.
10. The system of claim 9 , wherein the power control module includes a flyback transformer to generate an output signal on one or more rails.
11. The system of claim 1 , wherein the power control module includes:
a diode bridge for each of the first connection line and the second connection line;
a bulk capacitor;
a switching component; and
a flyback transformer;
wherein the bulk capacitor and the switching component are connected to receive an output of the diode bridge of the first or second connection line, and the switching component drives the flyback transformer to provide the regulated voltage output.
12. The system of claim 1 , wherein the load interface component includes a first field effect transistor (FET) and a second FET, a source of the first FET being connected to the first connection line, and a source of the second FET being connected to the second connection line, wherein a drain of each of the first and second FETs are tied together and driven by a gate driver.
13. The system of claim 12 , wherein the gate driver of each of the first FET and the second FET is driven by a microcontroller that is also connected to a corresponding zero-crossing detector circuit, each of the corresponding zero-crossing detector circuits generating a respective zero cross signal that enables the microcontroller to switch the corresponding first or second FET on and off in phase relative to a cycle of the alternating current source.
14. A power control system for controlling power to an electrical device, the power control system comprising:
a set of connection lines, including a first connection line and a second connection line, either the first connection line or the second connection line being connectable to an alternating current source; and
a power control module that is responsive to the alternating current source being connected to one of the first connection line and the second connection line to provide a regulated voltage signal output for a load interface component of the electrical device.
15. The power control system of claim 14 , wherein the first connection line and the second connection line, when connected, have a reverse polarity.
16. The power control system of claim 14 , wherein the power control module rectifies the alternating current source provided to the one of the first or second connection lines.
17. The power control system of claim 16 , wherein the power control module includes a flyback transformer to generate an output signal on one or more rails.
18. The power control system of claim 17 , wherein the power control module includes:
a diode bridge for each of the first connection line and the second connection line;
a bulk capacitor;
a switching component; and
a flyback transformer;
wherein the bulk capacitor and the switching component are connected to receive an output of the diode bridge of the first or second connection line, and the switching component drives the flyback transformer to provide the regulated voltage output.
19. The power control system of claim 17 , wherein the load interface component includes a first field effect transistor (FET) and a second FET, a source of the first FET being connected to the first connection line, and a source of the second FET being connected to the second connection line, wherein a drain of each of the first and second FETs are tied together and driven by a gate driver.
20. The power control system of claim 19 , wherein each gate driver of the first FET and the second FET is driven by a microcontroller that is also connected to a corresponding zero-crossing detector circuit, each of the corresponding zero-crossing detector circuits generating a respective zero cross signal that enables the microcontroller to switch the corresponding first or second FET on and off in phase relative to a cycle of the alternating current source.