Universal Power Supply/Bill of Materials

Funtions

The Universal Power Supply should provide these functions:

• Inverter
• Solid state transformer - 1200V, short range transmission lines - $60 cost of 45 kW transformer. [1]
• Induction furnace
• Plasma cutter
• Welder
• Laser cutter
• Charge controller to batteries
• Power conditioning from a windmill
• Induction heater
• Contactor
• Electric motor speed contoller
• Stepper motor controller

Part Reduction

What is the minimum number of electronic parts required to build the Universal Power Supply?

• Arduino for control. Arduino can also measure frequency to 50kHz for feedback - [2]
• IGBTs - choose one that can be scaled extensively, 10kW range (20A x5, 100V)
• Resistors
• Capacitors (filters)
• Small transformers
• Current sensors - Hall Effect Sensors
• Terminal blocks, 50A [3]
• Wire (8 ga, 55A, 600V) [4]
• Switches. Small switches, with IGBT serving as larger switch or contactor
• 200A contactor relay - 48DC - [5]
• Go for 600V on components, at 50A for wires, need 7 wires for 210kW - manageable as a modular system

Pulse Width Modulation

BOM for high frequency up to 65kHz is done with Arduino.

• Arduino has 500hz pulse width modulation - [6]. And 1000hz modulation - [7]. Up to 62.5 kHz - [8]

Inverter

Needs Arduino, 4 gate drivers, and 4 transistors as a minimum set.

• Modified Sinusoidal pulse width modulation - http://www.theorycircuit.com/arduino-inverter-circuit/

• Sample inverter using a transformer

• Transformerless - [9]