using a 320W flash with a 150W inverter - Electronic Circuits Projects Diagrams Free

denoise · 18th February 2006, 04:40 AM

Hi All!

this is my first post and I need some help.
I have a 150W sinus inverter I want to use with a 320W flash strobe... ok, ok, I know it sounds stupid, but wait.

The strobe demands 320W in one second and then stops. I can use my 150W inverter only if I raise slowly the flash power slider, otherwise the security system in the inverter stops the unit.

The flash manufacturer sell a unit for external power using this 150W inverter, but this one works with no problems even with several lights up to 5120W!. How do they do that ?.. they say it's a special inverter but I doubt it is something so special. The trick is that the this special inverter makes recycle time longer.

So, lets say that normally the 320W flash unit recycles to full power in 1 sec. , using the "special" 150W inverter the recycle time doubles to 2 sec. Using two 320 flashes, the recycle time is now 4 seconds, and so on.

So I guess this inverter can provide 150W constantly to much higher cosumption units without triggering the security circuit.

Is there a way I can limit the flash consumption in order to work with my normal 150W sinus inverter !?

Thanks!

Russlk · 18th February 2006, 07:22 PM

When you ramp up the power to the flash, you are limiting the peak current which allows the inverter to work. What you need is an automatic current limit for AC. I have never seen one, so can't help you there. It is going to increase the recycle time, no way to get around that.

denoise · 18th February 2006, 08:01 PM

Quote:

Originally Posted by Russlk

When you ramp up the power to the flash, you are limiting the peak current which allows the inverter to work. What you need is an automatic current limit for AC. I have never seen one, so can't help you there. It is going to increase the recycle time, no way to get around that.

thanks.

perhaps something like this would work?
http://www.maxim-ic.com/appnotes.cfm...te_number/2044

Russlk · 19th February 2006, 02:35 AM

No, that is a DC current limiter. I tried to make it into an AC limiter but could not fine good parts.

denoise · 19th February 2006, 04:52 AM

Quote:

Originally Posted by Russlk

No, that is a DC current limiter. I tried to make it into an AC limiter but could not fine good parts.

thanks for your information!

perhaps something like this can work :roll: ?
http://cgi.ebay.com/ws/eBayISAPI.dll..._BIN_Stores_IT

Russlk · 19th February 2006, 03:44 PM

Yes, that appears to be ideal.

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18th February 2006, 04:40 AM	(permalink)
denoise	using a 320W flash with a 150W inverter Hi All! this is my first post and I need some help. I have a 150W sinus inverter I want to use with a 320W flash strobe... ok, ok, I know it sounds stupid, but wait. The strobe demands 320W in one second and then stops. I can use my 150W inverter only if I raise slowly the flash power slider, otherwise the security system in the inverter stops the unit. The flash manufacturer sell a unit for external power using this 150W inverter, but this one works with no problems even with several lights up to 5120W!. How do they do that ?.. they say it's a special inverter but I doubt it is something so special. The trick is that the this special inverter makes recycle time longer. So, lets say that normally the 320W flash unit recycles to full power in 1 sec. , using the "special" 150W inverter the recycle time doubles to 2 sec. Using two 320 flashes, the recycle time is now 4 seconds, and so on. So I guess this inverter can provide 150W constantly to much higher cosumption units without triggering the security circuit. Is there a way I can limit the flash consumption in order to work with my normal 150W sinus inverter !? Thanks!

18th February 2006, 07:22 PM	(permalink)
Russlk	When you ramp up the power to the flash, you are limiting the peak current which allows the inverter to work. What you need is an automatic current limit for AC. I have never seen one, so can't help you there. It is going to increase the recycle time, no way to get around that. __________________ see my website: www.geocities.com/russlk

19th February 2006, 02:35 AM	(permalink)
Russlk	No, that is a DC current limiter. I tried to make it into an AC limiter but could not fine good parts. __________________ see my website: www.geocities.com/russlk

19th February 2006, 03:44 PM	(permalink)
Russlk	Yes, that appears to be ideal. __________________ see my website: www.geocities.com/russlk