High-power DALI
A digital addressable lighting interface (DALI) controlled device is arranged to communicate information according to a DALI protocol and powered by electrically coupling the controlled device to a DALI bus. The DALI bus is monitored for initiation of a DALI communication sequence. During a period of non-communication on the DALI bus, a high-current power supply is electrically coupled to the controlled device via the DALI bus. The high-current power supply provides a first high-current power signal to the controlled device. Upon detection of any DALI communication sequence on the DALI bus, the high-current power supply is electrically de-coupled from the controlled device for a determined time period. During the determined time period, a storage element is electrically coupled to the controlled device. The storage element provides a second high-current power signal to the controlled device.
1. A method for powering a device that is controlled through a digital addressable lighting interface (DALI), the method comprising:
detecting a period of non-communication on a DALI bus to which the device is coupled;
responsive detecting the period of non-communication, electrically coupling a power supply to the device;
subsequent to coupling the power supply to the device, detecting a communication sequence on the DALI bus;
responsive to detecting the communication sequence, de-coupling the power supply from the device for a period of time; and
during the period of time, electrically coupling a storage element to the device, the storage element arranged to provide power to the device.
2. The method of claim 1 , wherein the period of time is between two (2) seconds and sixty (60) seconds.
3. The method of claim 1 , wherein the period of time is based on a detection of non-communication on the DALI bus.
4. The method of claim 1 , wherein the device is an air quality sensor, an environmental sensor, a pollution sensor, a carbon monoxide sensor, a carbon dioxide sensor, a particulate sensor, a toxin sensor, a smoke detector, a fire detector, a lightning detector, a thermometer, a tilt sensor, a vibration sensor, a pressure sensor, a crash detection device, a microphone, a speaker, a horn, a light source, a light sensor, a LED driver, a light group controller, a light-ballast device, an alarm, a wind speed measurement device, a humidity sensor, a flood detector, a freezing condition detector, a communication device, an infrared detection sensor, a mobile device transceiver detector, a riot sensor, a crowd sensor, a pedestrian sensor, a child sensor, a disabled-person sensor, a vehicle sensor, a wildlife sensor, a geophysical sensor, or a weather sensor.
5. The method of claim 1 , wherein current supplied by at least one of the power supply and the storage element is at least two hundred fifty milliamps (250 mA).
6. The method of claim 1 , further comprising:
charging the storage element via the DALI bus during the period of non-communication.
7. The method of claim 6 , wherein charging current for the storage element is less than current supplied by the power supply.
8. A system comprising:
a first device that includes a digital addressable lighting interface (DALI) controller, the first device being electrically coupled to a DALI bus; and
a second device electrically coupled to the first device via the DALI bus, wherein the second device is arranged to:
receive power from a power supply that is electrically coupled to the DALI bus during a period of non-communication on the DALI bus, and
receive power from a storage element that is electrically de-coupled from the DALI bus during a period of communication on the DALI bus.
9. The system of claim 8 , wherein the first device is a streetlight controller, a small cell, a camera device, or a public WiFi device.
10. The system of claim 8 , wherein the second device is an environmental sensor device.
11. The system of claim 8 , wherein current supplied by the power supply exceeds, at least some of the time, two hundred fifty milliamps (250 mA).
12. The system of claim 8 , wherein the first device is electromechanically coupled to a streetlight.
13. A smart device comprising:
a controller electrically coupled to a digital addressable lighting interface (DALI) bus to which a controlled device is also electrically coupled;
a power supply;
a storage element; and
a switching circuit electrically coupled to the power supply and the storage element, the switching circuit being operable to electrically couple the power supply to the controlled device during a period of non-communication on the DALI bus and being further operable to electrically couple the storage element to the controlled device during a period of communication on the DALI bus.
14. The smart device of claim 13 , wherein the power supply is a DC-DC power supply.
15. The smart device of claim 14 , wherein the DC-DC power supply is arranged as a buck-boost power supply.
16. The smart device of claim 13 , further comprising:
a power interface that is compatible with a roadway area lighting standard, wherein power for the smart device is derived from power present on the power interface.
17. The smart device of claim 16 , wherein the controller electrically couples to the DALI bus through at least two electrical contacts of the power interface.
18. The smart device of claim 16 , wherein the power interface is arranged to pass an alternating current power signal between 120 VAC and 600 VAC.
19. The smart device of claim 13 , further comprising:
a power interface that includes a set of primary contacts and a set of secondary contacts, the set of primary contacts being arranged to carry a Line voltage signal, a Load voltage signal, and a Neutral voltage signal, and the set of secondary contacts being arranged to provide electrical coupling to the DALI bus.