[Milsurplus] instrument inverter

[Ray Fantini]

Q: My 618S1 requires 115 volts at 400 cycles, not a lot of current just
running couple servo motors, the fans been replaced with DC model. Am
planing on using small motor generator ( instrument inverter ) to supply
this. The motor part requires 28 volts at ten amps and was wondering how
important input DC voltage regulation is? know that output frequency is
a function of speed ( RPM ) but have no idea what regulates the output
of a instrument inverter? is it controlled by load or a function of
input voltage?
Ray Fantini KA3EKH