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I have a Turnigy Rotomax 50cc engine and I am trying to rectify it. I don't know whether it has delta or a wye winding style but I suspect that it is delta(Left Picture). enter image description here

This is what I have so far:

enter image description here

In my spice simulation I set the schematic up like this:enter image description here

OUTPUT:enter image description here

In my spice schematic I have 3 separate voltage sources set as sine waves with there negative terminals connected together. So I am trying to figure out how to hook up my rectifiers to an actual motor. My question is have I set it up right in my schematic? Do each of the motor phases attach to every other rectifier input?

Thanks for the help!

EDIT: Also the load is 50A nominal

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    \$\begingroup\$ What's wrong with using a regular 3 phase diode rectifier? Why all the drama of a mosfet solution? \$\endgroup\$ – Andy aka Jul 24 '14 at 23:42
  • \$\begingroup\$ Diode rectification is extremely inefficient compared to a mosfet solution and has the benefit of reduced voltage drop. \$\endgroup\$ – Axis Jul 25 '14 at 0:35
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    \$\begingroup\$ What ac voltage are you using. \$\endgroup\$ – Andy aka Jul 25 '14 at 9:36
  • \$\begingroup\$ Also, why are you connecting a motor to the input - do you mean generator? \$\endgroup\$ – Andy aka Jul 25 '14 at 11:31
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    \$\begingroup\$ What sort of frequencies are coming from the generator? \$\endgroup\$ – Andy aka Jul 25 '14 at 17:59
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It looks to me like your have tried to replicate three full-bridges (3 x 4 rectifying elements) when you only really needed to add one branch for a total of 6 rectifying elements like so:

Three-phase rectifier

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  • \$\begingroup\$ Diode rectification is extremely inefficient compared to a mosfet solution and has the benefit of reduced voltage drop. \$\endgroup\$ – Axis Jul 25 '14 at 0:34
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    \$\begingroup\$ Yes, this figure was meant to show the topology, in which you can replace diodes by MOSFETs, but then you have to control them with the proper sequence to rectify properly. I guess the OP was looking for a passive solution which would explain his more complicated topology. \$\endgroup\$ – gsimard Jul 25 '14 at 1:41
  • \$\begingroup\$ I guess I could always build an active solution but I would prefer a passive solution which I think I have working hence the simulation but my question is about how to hook up a delta winding to my current schematic. BTW Thanks for the help so far! \$\endgroup\$ – Axis Jul 25 '14 at 17:39

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