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Author Topic: 1-phase to 3-phase inverter  (Read 39211 times)

d3adp00l

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Re: 1-phase to 3-phase inverter
« Reply #15 on: October 19, 2009, 06:26:01 AM »
http://cgi.ebay.com/25-HP-ROTARY-PHASE-CONVERTER-CNC-air-compressor-saw_W0QQitemZ390098532173QQcmdZViewItemQQptZBI_Electrical_Equipment_Tools?hash=item5ad3af374d

Although I am not sure why you would want such a large phase converter. Its easier to buy a single phase motor, and swap it out for the 3 phase motor. But thats just the electrical contractor that I am talking.
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rkahler

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Re: 1-phase to 3-phase inverter
« Reply #16 on: October 19, 2009, 06:45:40 PM »
I'm not expecting that somebody else will do work or research for me.
I was hoping to find somebody who worked with such devices to point on some of them.
Local engineers had nothing for me, no device, no idea.
So, thanks for all ideas.
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the_big_m_in_ok

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Re: 1-phase to 3-phase inverter
« Reply #17 on: October 19, 2009, 09:03:34 PM »
rkahler said:
Quote

Local engineers had nothing for me, no device, no idea.
So, thanks for all ideas.
I had an idea for a regeneratively cooled(using its own fuel; typically liquid ammonia, xenon, etc) ion/plasma thruster and I got some free advice from a business owner who did custom prototyping:  Get a patent or your idea will probably be stolen.

That was the only time I got free advice.  I suspect all others---especially nowadays---will require payment.  Probably in advance with a signed contract.
My Dad was an engineer for 30 years and he never worked for free.

All Members and informal forum guests might want to keep this FYI experience in mind for the future, if they don't know now.

--Lee
« Last Edit: October 20, 2009, 01:14:47 AM by the_big_m_in_ok »
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MrMag

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Re: 1-phase to 3-phase inverter
« Reply #18 on: February 08, 2010, 05:56:48 PM »
Not sure if you already found something but:


http://www.ronkelectrical.com/add_a_phase.html
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pese

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    • Freie Energie und mehr ... Free energy and more ...
Re: 1-phase to 3-phase inverter
« Reply #19 on: February 09, 2010, 10:48:08 AM »
Quote from: Staffman on October 15, 2009, 04:48:45 PM
Check out http://en.wikipedia.org/wiki/Inverter_(electrical)....

Look at the section marked 'Three phase inverters' for a simple circuit. The only problem is that it is missing the triggering circuit.

A different way to make 3 phase energy is to modify a distributor.
You must no do this work.
The resistance of 3 heaters in the boiler ist done TO SPLIT THE NEEDED POWER in 3 pases of YOUR LINE.

Because it is to mucht to suck 20Kilowatt from 1 Phase.

: so approx 3 time 7 KW are split to  3 phases.


IF YOU will invert 1 pase to 3.  You must alse have in ONE Phase 20KW

and this ist to much.


IF THIS IST possibel,
You acan connect all 3 phases-wires (from the boiler) to ONE Phase of your line-source.

BUT the 20KW (will not hold by the fuse and hous installations)

What you cabnn do ...
IS.

Conect only 1 phase of the boiler to your Line-supply.

AND WAIT

3 time longer to heat the water.

No problem , if all was installed - use this way.

G Pese


---
For other appication. (if the 3 phase (with each 120 degrees shifting ist necessary)  to drive motors enz.

The cheapes way ist to use am motor-generator.

1 phase motor coupled with an 3 phase generator (dynamo) .



c
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sparks

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Re: 1-phase to 3-phase inverter
« Reply #20 on: February 09, 2010, 02:12:28 PM »
@Pese

    Imagine the power you could get down a single wire using ground as the return wire if you made the single conductor carry 5000 phase. 
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mscoffman

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Re: 1-phase to 3-phase inverter
« Reply #21 on: February 09, 2010, 05:30:59 PM »
Quote from: sparks on February 09, 2010, 02:12:28 PM
@Pese

Imagine the power you could get down a single wire using
ground as the return wire if you made the single conductor
carry 5000 phase.


Three phase uses three wires and 5000 phase would use 5000 wires.
If the total power in the system is sent down a single wire it will
be 3 or 5000 times as much as in each individual wire. It's all about
on-average using smaller current wires traded off with many more
connections.

Usually only some part of a machine will operate on 3 phase and the
controls will operate on only one...because 3 phase uses many more
components to perform the same function. So only where there is
a payoff, in the heater or in the motor will 3 phase really be used.
So, study the machines schematics and remove and replace just
the three phase components with single phase ones.

:S:MarkSCoffman
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sparks

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Re: 1-phase to 3-phase inverter
« Reply #22 on: February 09, 2010, 10:19:01 PM »
mscoffman

    The single phase output can be at very high frequency.  This allows for very little current while transmitting alot of power.  The voltage drop of the transmitting line very little because the currents are minimal while the change in charge state along the conductor is maximal.
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