TheEEStory.com

Polarity have added this DC-DC converter to their website

http://polarity.net/Products/3500V_to_5VDC_DC_t...

Input Voltage 3600V to 850V DC
Output Voltage 5V DC
Power 10W

Can anyone see any application for this other than with EEStor's ESU?

Has Polarity simply added this to their website to get our attention?

Likely what EEStor had ordered from Polarity to build, though it's only 10 Watts, could be used for control logic.

Looks like it would work for a laptop, almost... you need more like 9-18V and maybe about 2x-3x the wattage. hard to tell the size, anyone know what kind of power connector that is?

Notice the words 'charge' and 'discharge'. I can't think of anything that can be charged and discharged that works at 3500V except an EESU.

Could be a first version (pre-shrink) for an ipod or cell phone prototypes perhaps?

5 Volts is good for USB devices.

Well, since household current is 110-120 volt AC, no large battery I know of is rated at 5 volts, and since 10 watts is barely enough for a low-powered light bulb, I'd think that this has nothing to do with an EESU.

I also wonder about the greater than 90% efficiency. This seems a far cry from the 99.9+ % efficiency claims I've seen for charging a battery. A few percent charging losses is a big deal.

It would be kinda of odd to charge a 3500V device from a 5V source. It is somewhat of a feat if this device can do it efficiently. It is also a little funny that it seems to require a minimum of 850V to generate 5V.

This is the probably what they made for eestor...too bad there is no concrete evidence that eestor has completed anything.

http://polarity.net/Applications/Commercial

Are we sure this is new?

Oakthicket wrote:

Well, since household current is 110-120 volt AC, no large battery I know of is rated at 5 volts, and since 10 watts is barely enough for a low-powered light bulb, I'd think that this has nothing to do with an EESU.

I also wonder about the greater than 90% efficiency. This seems a far cry from the 99.9+ % efficiency claims I've seen for charging a battery. A few percent charging losses is a big deal.

Here we go already.

1 Ok what do you think it could be used for, have you seen any 3500V batteries lately?

2 90% Seems reasonable to me considering the voltage range required. The efficiency required depends on the application which we can only guess

I wonder what their minimum order is, and what it would cost to have something like that done.

ShortEE wrote:

Are we sure this is new?

No not sure at all.

I have not seen this on Polarity's website before although I have seen references to EEStor and I think the 10kW converter.

It is possible Polarity is trying to get as many patents as possible on 3500V converter designs so that they reap the benefits if the EESU materializes.

What voltage do your typical solar panels operate at? Could we be looking at this the wrong way? Is this a trickle charger for PV to EESU?

5v stabilization for computers, cars, ect. Also led flashlight.

pfujimoto wrote:

What voltage do your typical solar panels operate at? Could we be looking at this the wrong way? Is this a trickle charger for PV to EESU?

Solar Panels generally are 12V or 24V and then often connected in series for higher voltages

starm_ wrote:

It is possible Polarity is trying to get as many patents as possible on 3500V converter designs so that they reap the benefits if the EESU materializes.

Well, they aren't just getting a patent. They are designing one and at least making a prototype. They also have it on their website, suggesting they have made or have the ability to make large quantities. Sure seems like a lot of work for something that might be "just in case". This just doesn't seem like work that would be done unless they are sure they have customers.

eelect_tron wrote:

5v stabilization for computers, cars, ect. Also led flashlight.

For those more knowledgeable, is this item from a different manufacturer similar in concept/applications, just doesn't use the 3500V source (EESU?)

"Suitable for voltage stabilization of automobile electronics, special purpose UPS, etc."

Automobile electronics??? heh-heh!

http://www.powerstream.com/dda.htm

vs. the item from Polarity's website: http://polarity.net/Products/3500V_to_5VDC_DC_t...

Sure looks like "circumstantial evidence" that EESU exists and might soon be used in an automobile!

Last edited Fri, 15 Jan 2010, 12:27pm by karl

EExpired wrote:

Polarity have added this DC-DC converter to their website

http://polarity.net/Products/3500V_to_5VDC_DC_t...

Input Voltage 3600V to 850V DC
Output Voltage 5V DC
Power 10W

Can anyone see any application for this other than with EEStor's ESU?

Has Polarity simply added this to their website to get our attention?

I can't see any other application for this outside of eestor

The topic title is awesome.

Polarity is IN

From the leaked telephone interview last May, Dick Weir said that he was planning to visit with Polarity within the next week or so, to "have a long talk with them".
If he was only going to discuss the ZENN requirements, that could have been taken care of via fax and from visits from Ian C. Seems to me that Mr. Weir wanted to order a variety of inverter/converters for EESUs of all size, shape and purpose!

Oakthicket

Your post is just plain silly. Below 'Not Even Wrong' status. Now who is being delusional?

90% efficiency for a DC-DC converter is about normal. I would say it is excellent for low wattage, small size 3500 VDC to 5 VDC.

Bretspot

The connector looks like it has the size required for 3500 VDC. You need some significant spacing for 3500 VDC safety.

I agree, Polarity is still "IN"

karl wrote:

eelect_tron wrote:

5v stabilization for computers, cars, ect. Also led flashlight.

For those more knowledgeable, is this item from a different manufacturer similar in concept/applications, just doesn't use the 3500V source (EESU?)

"Suitable for voltage stabilization of automobile electronics, special purpose UPS, etc."

Automobile electronics??? heh-heh!

http://www.powerstream.com/dda.htm

vs. the item from Polarity's website: http://polarity.net/Products/3500V_to_5VDC_DC_t...

Is this thing the size of a dime or a breadbox?

starm_ wrote:

Notice the words 'charge' and 'discharge'. I can't think of anything that can be charged and discharged that works at 3500V except an EESU.

I was thinking that this could be used in conjunction with an automotive EESU, but since it provides charging, it obviously would not, since you'd never charge an automotive EESU with this.

It looks like it would have to be for some 5V, 10W max device.

Y_No wrote:

Is this thing the size of a dime or a breadbox?

Comparing to the size of wires/ connector (just guessing) but looks like the size of a paperback book?

This is way, way too small EESTOR automotive or even bicycle applications. ZENN would need something like 10KW, and this is only 10W.

On the other hand, what else but an EESU generates a DC input voltage ranging from 850V to 3500V?

Maybe this is for some other application. A desktop computer consumes around 80W -- maybe a small laptop can run on 10W, or maybe a tiny power tool.

Last edited Fri, 15 Jan 2010, 1:02pm by InWDC

karl wrote:

Comparing to the size of wires/ connector (just guessing) but looks like the size of a paperback book?

StephenB wrote:

karl wrote:

Comparing to the size of wires/ connector (just guessing) but looks like the size of a paperback book?

Looks like it; looks to be about a third bigger than an iPhone.

Maybe one third of a box of Valveeta.

Compare this one, which *might* use the same connector and is 1.5" x 4.1" x 1.3":
http://polarity.net/Products/Low_Power_HV_to_LV...