Help:resolution Of High Voltage Dc Power (400v)applied In The Aircraft Model

[greeting]

Dc-dc Convert Module (input:12v Output:400v) Volumn:50w Or So,as It's Apllied To Pressure Sensor In The Aircraft Model

,it's Expected That The Weight Of Module As Low As Possible

I Wonder If Such Chips Are Available In The Market Or Someone Could Supply His Own Resolution In Dsp Or Mcu System

The Load Of Output Is Capacitotr-featured Pressure Sensor

[vintage1]

Take this to DIY electronics.

Its very doable, but we need to know more about how much current you need to draw off it.

Oh. 50W. Hmm.

You need to find a switched mode power supply that does European mains (400v peak) to 12v, and turn the transformer around :D ...and a bit more.

It will need a little ferrite transformer.

Mmm. Thinks. That sort of converter is pretty much what would be used in a flash gun or small transitorised IC ignition system. Pirtating one of those might be good.

[Mark Wood]

Take this to DIY electronics. Yes, sir. Done, sir.

mw

[vintage1]

Oh. Sorry. Thats sounded very authoritarian didn't it?

[jeffs555]

What pressure sensor are you using that needs 400volts at 50watts? It would probably be better to look for a low voltage, low power sensor.

[microflite]

Sounds pretty dangerous. Voltage alone won't kill u unless it has the current
capacity to do so. In this case it does, so if u do end up doing this, be
very careful.

Ashok

[greeting]

it's a project about a wing change aircraft, and the sensors installed around the wing are measurement for the deformation of the wings' material and if someone could submit a subsititute or his own experience.

[greeting]

I wonder if it's acsseible to accumulate the single cell unit to DC 400V ?

[vintage1]

what is wrong with strain gauges?

[greeting]

In Fact It's A Aaw Model,piezoelectric Actuator Is Expected ,but The Whole System Cost Too Much Including Amplifier ,about 2000 Euro,i'm Looking Around For Some Ways To Cut Down The Cost, Strain Gauge May Be A Another Thing

[C@T]

Hi greeting,

is that realy a model size aircraft, you going to put those piezoelectric aktuators in ???

To me it seems that it would be a heavy and very powerhungry application.

[greeting]

IT'S PREFERED TO INSTALL TWO OR THREE PAIR XYZ 3-AXES PEIZOELECTRIC ACTUATORS AT THE EDGES OF WINGS BUT THE TOO SHORT TRAVEL(10UM).IN MY PROJECT 1000uM IS EXPECTED,SO SINGLE AXIS PIEZOELECTRIC ACTUATOR IS THE MERE AVAILABLE , BUT IN ORDER TO GET THE EQUIVALENT DEFORMATION EFFECT,MORE ACTUATORS'LL BE INSTALLED AT MUCH MORE POINTS. IT'LL CAUSE COMPUTATIONAL AND CONTROL COMPLEXITY.

SO SOME ADVICE ABOUT THE OPTIMAL RESOLUTION IS EXPECTED.

WING SPAN:118in AREA:1890 sq in
1KG LIMITED TO THE ACTUATOR SYSTEM(INCLUDING AMPLIFIER)

[greeting]

I Managed To Diy It In Dc-ac-dc Convertor Mode

But Ripple Is The Killer To The Actuator System

Maybe Commercial One Is More Reliable

[vintage1]

Strain gauges are the way to go mate. Cheap, light, and all you need is a d to a converter with many inpit chanels, so you can sample each one.

I thnk you tend to us them in pairs as a bridge, so teh ones e.g. on top are balanced by teh ones underneah, and only teh difference in conditions between them is measured.

Its been a long time, so I may be wrong, but I distinctly recall projects in the mech. eng. labs covered in fine wires going off to data recorders...and they never had any money, so they must have been cheap. :D

[Comatose]

This could be done fairly easily. Are you SURE that you're comfortable around a 400V dc bus in your project? Just knowing it's there would give me the willies.

If you already have a working DC-AC-DC (chopper to transformer to bridge rectifier I assume you mean) then getting rid of ripple is simply a matter of one or more low pass LC filters. At what frequency are you running your chopper?

[greeting]

IN ORDER TO DRIVE THE LITTLE CAPACITOTR-FEATURED LOAD(PIEZOELECTRO ACTUATOR). IT'S EXPECTED THAT AMPLIFY THE INPUT CONTROL SIGNAL(0~12V) 35~40 TIMES TO MAX 400V(LONGEST STROKE OF PIEZOELECTRO ACTUATOR). A COMMERCIAL CUSTOM ONE SEEMS UNACCESSIBLE(BELOW 80 EURO),
AND LIMITATION OF WEIGHT,SCALE,VOLUMN(50W) ARE ALSO TROUBLESOME.
TRANSFER FUNCTION SHOWS A low pass bandwidth 1 hz, LC FILTER AND PULSE TRANFORMER WOULD HOLD TOO MUCH ROOM