View source for Deriving Power Electronics from Transistors and Microcontrollers

=Introduction=
With the principle of [[Part Count Reduction]] within OSE's [[Module Based Design]] approach - we are interested in using this principle to facilitate the design of electronic circuits, and in particular, power electronic circuits.
 
With low cost microcontrollers (700 Mhz Pi Zero is $5) and transistors (IGBTs are $1/kW of power handling) - we can design low cost power electronics. Let's look at how this can be done for simple learning circuits which can serve as a basis of robust industrial applications. These examples show the limits of power for various devices.

=Inverter=
*10kW direct solar power inverter case using Arduino and IGBTs for $25. Inverter at 120V for regular loads such as power tools. 
*Start with 1kW of PV for test, then move to 10kW.
*10kW case is scalable to 100kW
*Slide 12 of [[Open_Source_PV_System#Initial]] shows max power point - current at about 9A and voltage at 31V - for PV panels.

==1kW==
*4 PV panels in series at 120VDC. 9A.
*Arduino produces a square wave at 60 Hz at 50% duty cycle
*Inversion occurs through an H bridge
*Cost: [4] $4 for IGBTs (18kW continuous) [https://www.mouser.com/ProductDetail/STMicroelectronics/STGW30NC60WD/?qs=bbdZqDPQhEUJJb0Z4VAXWQ%3D%3D&gclid=EAIaIQobChMI9d-S0sOc2QIViEJpCh2FggE1EAQYAyABEgJjc_D_BwE]
*Gate drivers - Arduino doesn't have enough juice to power IGBT gate efficiently -  [4] $1 - [https://www.mouser.com/productdetail/?qs=r%2FVmNO8Tjq5kfT%2FCttKvgw%3D%3D]

==10kW==
*Let's see cost of 54kW - 
*At 240V - need strings of 8 solar panels in series
*Protection - 225 amp circuit breaker - $75[https://www.menards.com/main/electrical/circuit-protection-distribution/circuit-breakers/c-1489583170892.htm?Spec_MaximumAmperage_facet=225&ipp=36]
*54kW for the above
*Inversion - Just scale the IGBTs above. Use 3 instead of 1 for

=Induction Furnace=

=Welder=