Check out this new 400hz, 230-volt variable frequency motor drive for aviation-based application from Invention House. 
Model #: 3PD-25230 AviationDrive
- 3PD Input/Output Configuration: 3-phase input, 3 phase output.
- 230VAC - 65Amps rms (20hp) (10hp also possible)
- 50/60/400hz Output
- Flange for bulkhead mounting.
- Minimal cooling required - just 5 cfm across the heat sink fins.
- -40C to +55C temperature operating range
- 40g shock, 2grms vibration
- 10lbs total weight
400Hz Aviation Motor Drive Applications 
- Helicopter-based winches
- Aviation-based motors driving pumps, fans, mechanisms
