Arduino controlled Rotary Phase Converter

hi all,

yes, new.

i have built several rotary phase converters (rpc) using industrial equipment on single phase power.  aware of dangers of working line voltages.

i have thought of way use arduino control fine tune rpc.  if not familiar rotary phase converters, capacitors used between 2 single phase lines , phantom line motor running , fine tune voltages.  able pull in , out capacitors single phase legs phantom leg.  obviously, under heavy loads , high inrush currents, voltages drop , arduino pull in capacitance when needed , drop when stable.

i use transformer 240v primary 12v secondary, rectify, add cap, , use voltage divider below 5v can use arduino's built in analog digital converter.  3 phases.  l1-l2(a0), l2-l3(a1), l3-l1(a2).  l1-l2 coming straight utility , 240vac + or - 5%.  arduino monitor these inputs , make adjustments phantom phase load changes, etc...  have no problem creating voltmeter, however, struggling figure out best way structure this.

i thinking have start capacitors controlled time delay relay aside arduino.  bring in massive amount of capacitance motor moving.   i have set amount capacitance in system.  lets needed 200uf l1-l3 , 150uf l2-l3 , phase phase voltages follows:

l1-l2: 239vac rms
l2-l3: 232vac rms
l3-l1: 230vac rms


i use arduino pull in various steps of capacitance fine tune system.

let's have 2 sets of 4 steps of 5uf, 10uf, 20uf, 35uf (one set l2-l3, , 1 set l1-l3)

i testing figure out voltage change per each of these capacitors phantom phase below rms voltage utility , create algorithm in sketch pull in these stages accordingly.  if there high inrush, of output turn on trying system balance out again.

let me know if has ideas on this.  give more details if interested.  advice appreciated.

arduinos toys, intended learning , experimentation.

they not hardened against kind of abuse or environmental insults, , software not reliable.

arduinos totally unsuitable development , operation in electrically noisy, industrial environment.

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