Will any commonly available 240V VFDs go up to 400Hz? Need around
7.5HP.
400Hz 3-phase power
Jul 05, 2011
40 Replies
7.5HP.
my hitachi and my mitsubeshe (sp) both do 0 to 360 Hz.
Karl
Powering up your surplus Minuteman missile?
5hp motortronics does 0 to 400 Hz
At least some Yaskawas and Mitsubishis do; I've used them up in that range on high speed spindles.
If you're ebaying for used Yaskawas, be aware that in the past many were rebranded as Magnetek GPD5xx.
Close. Testing a mass of sophisticated equipment that gets crammed into a small cargo aircraft.
It seems like a 60Hz to 400Hz converter would be a common accessory in avionics shops -- or do they go for avionics prices?
ha
I suspect most provide a few watts; at best tens of same.
60 / 400 Hz motor gensets are a fairly common military surplus item these days
You might want to look at this. It's the way we tested missiles in the Army.
formatting link
I bet they'd take half the asking price.
A VFD does NOT produce 240 V sine waves. It produces 400 V square waves that are the equivalent to a MOTOR, ONLY! it will definitely fry any electronics you connect to it!
It is theoretically possible to filter the VFD output, but that would be a significant job to build.
Jon
I want to run an MG set off of it to get (a lot of) DC . ;-)
Gee, seems like a VERY round-about way to make DC. But, if you already have the MG set, then it will work.
Jon
Then why not just get a big DC power supply?
Why do they use 400 Hz for anything?
RWL
400 Hz reduces the iron needed in magnetics such as generators, motors and transformers. Weight is a big big factor in aircraft.
Also makes it easier to get the speed required for gyro instruments.
Did anyone consider that he wants to test that power supply?
Some of the Mitsubishi ones will. Possibly others. You need to go into the configuration options to enable going that high.
O.K. No knowledge about that. I have a 3 HP one which will go up to 400 Hz if properly configured.
Good Luck, DoN.
I work in the avionics industry. Just how are you going to show all the environmental compliance test requirements. The commercial world uses RTCA DO-160() as the bible. There are many test requirements that must be shown for airworthiness. The big ones are that it does not upset other equipments, and is not a fire hazard. Even if the equipment is non-essential to safe flight and landing, it can not upset equipments that are essential or critical to SFL. Radiated and conducted RF emissions are the expensive test lab tests. Even for experimental test flights, the safety of flight paperwork must show that the equipment will not cause safety problems. ignator
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required