Universal Power Supply

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Universal Power Supply
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Universal Power Supply

Main > Energy > Power quality


A Universal Power Supply forms the backbone of an off-grid electrical system for powering machines and power electronic devices such as the induction furnace.



This is a combination inverter, converter, pulse-width modulation current controller, and high frequency power supply for applications from off-grid power, charge controllers, to power supplies for welders, induction furnaces, and plasma cutters.

A large range of power electronic devices is desirable within the infrastructure of communities. Having an individual power supply for each is redundant and expensive. A modular UPS construction kit is desirable as an analogue to the 'industrial-strength Lego' that we have already demonstrated for heavy mechanical hardware infrastructures.


Rectifier power dissipation as a function of current

Rectification is the conversion of AC to DC. A universal power supply would require one or two rectifying stages: one at the AC input to provide DC for the voltage converter, and another if the voltage converter is a proper Active PFC converter, which produces PWM shaped output.

Rectifiers can be either passive schottky diode bridges, or active (IC-controlled) MOSFET H-bridges. Passive ones are cheaper, and ultimately more efficient for very high currents, while active ones are superior for low-medium-and-maybe-high currents yet more expensive. This design choice affects price, producability and simplicity.

In either case a rectifier stage requires power packaged components and a heat sink. The size of the heat sink is a function of the current, which is higher at low voltages for a given output power. Questions for the specification is how much power the device should be able to deliver from a 12V source (first rectifier in the case of voltage up-conversion) and to a load at 12V DC output (second rectifier if present).

Voltage Converters


An inverter is an electrical device that converts DC voltage from batteries to AC voltage for off-shelf electrical tools and appliances.

Off-the-shelf inverters have about a 2 year lifetime, and 5-10 year lifetime for higher quality models. Lifetime design inverters with plug-in replacement components are required for sustainable communities which use battery storage as a component of their electricity infrastructure. One of the few other feasible, non-battery, non-fuel energy storage may be via heat storage coupled to thermoelectric generators, or possibly thermal storage via phase-change salts and heat engines.

Product Ecology

Product Ecology
Universal Power Supply Universal Power Supply
From Uses Creates Enables



OSE is recruiting subject matter experts with experience in inverter design. Those with relevant experience are encouraged to Contact Us

Adjustable Power Supply v18.08 is in development

See Also

The Global Village Construction Set
Habitat CEB Press Cement Mixer Sawmill Bulldozer Backhoe
Agriculture Tractor Seeder Hay Rake Well-Drilling Rig
Microtractor Soil Pulverizer Spader Hay Cutter Trencher
Bakery Oven Dairy Milker Microcombine Baler
Industry Multimachine Ironworker Laser Cutter Welder Plasma Cutter
CNC Torch Table Metal Roller Rod and Wire Mill Press Forge Universal Rotor
3D Printer 3D Scanner CNC Circuit Mill Industrial Robot Chipper Hammermill
Drill Press Induction Furnace
Energy Power Cube Gasifier Burner Solar Concentrator Electric Motor Generator Hydraulic Motor
Steam Engine Heat Exchanger Wind Turbine Pelletizer Universal Power Supply
Nickel-Iron Battery
Materials Aluminum Extractor Bioplastic Extruder
Transportation Car Truck

Imprimante 3D Scanner 3D Extracteur d'Aluminum Pelleteuse Four à Pain Presse à balles de paille Extrudeuse à bioplastiques Bulldozer Voiture Presse BTC Betonnière Broyeur à marteaux Imprimante de circuits électroniques Table de découpe numérique Trayeuse Perçeuse à colonne Moteur électrique Gazogène Faucheuse Râteau à foin Moteur hydraulique Fourneau à induction Bras robotisé Poinçonneuse Découpeur Laser Laminoir à plaques Microcombine Microtracteur Multimachine Batterie Ni-Fe Machine à granulés Torche plasma Power Cube Presse hydraulique Laminoir à barres et fils de fer Pulvérisateur de terre Scierie Semoir Concentrateur solaire Roto-bêche Moteur à vapeur Echangeur de chaleur Tracteur Fraiseuse de tranchée Camion Alimentation électrique universelle Rotor universel Poste de soudure à l'arc Plateforme de forage de puits Eolienne

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