DC UPS
Many a times one needs to extend Ethernet through LAN switches networked with each other; Installing WiFi CPE at rooftop and sharing the internet connection among friends colleagues again requires elaborate power arrangement for each of the switch or WiFi node. Using PoE increases the cost of equipment as well as cable. Convetional UPS are inefficient and expensive considering very low power requirement viz-a-viz cost
Instead of converting DC to AC through UPS and then converting it back to DC through power adopter of the equipment would waste 1 to 20% at each conversion. DC UPS solves the problem by:
- Minimizing the Conversion Loss. Inside UPS (AC to DC and then back to AC). DC power adopter (AC to DC). In DC UPS there would be only one conversion. Reminds me of Anwar Masood's poetry.
- Long backup time. In typical case it would be 6 to 12 hours.
- Cost Effective
Instead of converting DC to AC through UPS and then converting it back to DC through power adopter of the equipment would waste 1 to 20% at each conversion. DC UPS solves the problem by:
- Minimizing the Conversion Loss. Inside UPS (AC to DC and then back to AC). DC power adopter (AC to DC). In DC UPS there would be only one conversion. Reminds me of Anwar Masood's poetry.
- Long backup time. In typical case it would be 6 to 12 hours.
- Cost Effective
کوفتہ
بوٹی لئی تے ٹوکے دے نال قیمہ قیمہ کیتی
محنت کر کے اس قیمے دی فیر بنائی بوٹی
فیر بنایا قیمہ اسدا رکھ کے دنداں تھلے
شاوا بلے بلے
میں سالن کھاواں نالے ہساں تِما تِما
بوٹی قیمہ، قیمہ بوٹی، مڑ بوٹی دا قیمہ
کوفتے ورگا لگا مینوں سارا سفر اساڈا
پانی دے وچ پینڈا کچھیا کھا کھا لمے غوطے
جیہڑی تھاں توں ٹرے ساں انور،
اوتھے ای آن کھلوتے
انور مسعود
بوٹی لئی تے ٹوکے دے نال قیمہ قیمہ کیتی
محنت کر کے اس قیمے دی فیر بنائی بوٹی
فیر بنایا قیمہ اسدا رکھ کے دنداں تھلے
شاوا بلے بلے
میں سالن کھاواں نالے ہساں تِما تِما
بوٹی قیمہ، قیمہ بوٹی، مڑ بوٹی دا قیمہ
کوفتے ورگا لگا مینوں سارا سفر اساڈا
پانی دے وچ پینڈا کچھیا کھا کھا لمے غوطے
جیہڑی تھاں توں ٹرے ساں انور،
اوتھے ای آن کھلوتے
انور مسعود
Components
AC/DC Converter and charge controller. Thousands of circuits can be googled with this name. Anything can be adopted as long as it serves the purpose; Charging the battery; avoiding over/under charging; sufficient current to charge the battery as well as power the circuit.
Battery. In typical applications (explained above) 7ah sealed lead acid (SLA) used in standard UPS is good enough.
Voltage Regulator. Three legged ICs available for all required voltages will be used. Multiple regulators in parallel may be employed to drive different voltages from one battery. The only consideration is its current rating that should be as per input current requirement of the device.
Battery. In typical applications (explained above) 7ah sealed lead acid (SLA) used in standard UPS is good enough.
Voltage Regulator. Three legged ICs available for all required voltages will be used. Multiple regulators in parallel may be employed to drive different voltages from one battery. The only consideration is its current rating that should be as per input current requirement of the device.
Connections - Final Look
I think no explanation is required here.