Sorry - maybe I should be clearer:-
I am ON grid. I currently have no method of being off grid. The DC motor currently feeds a Grid Tied inverter which requires the grid (single phase) to work.
The suggested inverter drive system will require the presence of a good 3 phase supply. In the UK...
Please forget anything to do with auto alternators - speed is nowhere near right.
The system will regen back to the house 3 phase supply. It is supplying the inverter, which supplies the motor.
there are NO BATTERIES involved.
Sort of - more along the lines of runnign a 5.5kw 3 phase induction motor, using a inverter as a 'brake'.
total cost, new, 1600 pounds.
How 'efficient' is the brake?
Update - I have been informed of a new possible method of creating my power:- inverter drive running in full regen mode.
Mods - would you permit me to start another thread asking some really really dumb questions about this setup, or are you sick of thickos like me?
Silly question - if half the brushes were in use, then the current in each of the armature coils would be doubled (assuming constant total output current) thereby increasing the overall efficiency....
or is this madness? ISTR that the 12 o clock pole (N) is directly connected to the 9 o clock...
OK - I have re-done the first part - I was surprised at how much I had to move the brush holder - approx 1/2" anti-clockwise from 'upright' to achieve zero volts on the brushes.
I have a slight sparking on the trailing edge of one brush I can see - I cannot confirm the same from other brushes...
Waross - I have performed the check you suggested - I read 0.2VAc on the brushes - I assume this is within tolerance (or I might well be missing the point, and its the last 0.001V that matters ;)
Varistors arrived today to protect the end user(s) from large back emf's due to grid shutdown /...
My power readings are from the Grid Tie Inverter (GTI).
It has power in, power out, voltage in / out etc etc readings. Its made by Power-one / Magnatek, and is called a PVI-3600-UK (its based on a photovoltaic product, 3.6kw, and configured for the UK - obv an engineer came up with the name ;)...
Thank you waruss
I take it 240 VAC will be just as suitable? The brushholder carrier ring (plastic) is held by 4 bolts, and is easy to swing round for brush replacement (so you can get to the bottom ones etc) - I take it this is what you refer to?
There are marks on the edge of it - much like...
Well - that was fun. It was a friends birthday last night, so we all went to the pub. Much Cider was consumed.
At 3AM the wheel starts 'making strange noises' according to my painfully sober wife.
Still not really safe to operate heavy machinery, I attempted to investigate, but failed.
This...
I'm afraid I am at the other end of England - sunny Somerset.
I am interested in this statement
You may be able to use the interpole winding as a current shunt.
Even though there is not a lead from the interpole internal connection, the interpole winding will be connected to one set of...
Skogsgurra - power factor does exist with AC systems. The field (was) powered by the AC 240v 50Hz UK mains. This went through a rectifier (bridge). The eco meter (something similar here...
Theres no battery bank - it runs, as in the first post - to a grid tie inverter. It cannot 'motor' and as such, there are no diodes.
Yes - it speeds up when the field power is disconnected - I have seen over 1500 rpm (rated is 1100). This is due to it unloading the driver (water wheel) and...
Sorry to double post - cant see the edit button...
Right - have now disconnected the capacitors, and the field power meter is now reading 500 watts - I guess it has a very poor power factor correction system..
<scurries off and opens case to look at connection diagram>
OK - its connection version 406770-1 found here
http://www.reliance.com/pdf/pdf/dccd/406770-1.pdf
I do NOT have the optional AX1 connection to remove the 'inter-coil'
I have NOT connected A2 to S1 for series field - S1 and S2 are...
