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Re: [TCML] Mot Help needed



----- Original Message ----- From: "Jim Mora"

I have 2 MOTS ready to submerge in a ammo box of transformer oil. It crossed my mind that I may have a phasing issue. Clearly, on the 120/240 feed side,,
the winding on the inside needs to go to the other outer winding to series
them for 240 volt op. I plan to do a FW bridge so I believe I have to
disconnect the grounds at the cores. Do I have to take the output of one and tie it to the internal winding of the other as in the LV phasing? This will
be stressful for both windings but I can't seem to get my head around if I
can connect the two inner turns. In the least this would create a reverse
mutual inductance if not null output.. In the scenario of traditional series
both inner cores will see the full 2200v. I guess this is ok under oil?

If you're using four diodes in your bridge, leave the inner HV windings connected to the cores, and ground the cores. This will give you two HV outputs which are opposite in phase and ground referenced.

You want to connect your inputs in series; use a 12V AC step-down transformer fed from a variac (for safety and control), and feed your primaries up to 12V AC while measuring the voltage difference between the secondaries (should end up ~440VAC). If you don't get the output you are seeking, flip one of the primary connections.

Jon
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