All 370's ran off 415 Hz 3-phase power. The mid-sized ones had the
motor-generator set built into the back of the machine. The 415 Hz
(regulated) power was transformed to low voltage and run through an
inductor-input filter and then series pass regulated. They had a circuit
they called an "electronic capacitor" that pulled extra current through the
inductor during the voltage peaks, so the inductor carried enough current
during the voltage valleys. This reduced the ripple current on the capacitor
banks.
The 360s ran off single-phase 120 V 2500 Hz power, produced by a
"converter-inverter" unit in the back, that converted utility 3-phase power
to DC, then inverted it with an SCR inverter. This made the DC power
supplies in the machine quite small. Since they ran off regulated 2500 Hz
power, they dropped only a very small voltage across the series-pass
transistor.
Jon
Am I getting this right?
So they take AC turn it to DC then turn it back to high frequency AC
then turn it back to DC to drop the need for larger capacitors to keep
the DC clean?
Pretty wild.
Anyone run any of this stuff at home / light commercial clubhouses?
--
Ethan O'Toole
