IPS v1.1 : New tests results by JL Naudin

IPS v1.1 : New interesting tests results
Tests by Jean-Louis Naudin
Created on February 19, 2004 - JLN Labs - Last update February 20, 2004
Toutes les informations et schémas sont publiés gratuitement ( freeware ) et sont destinés à un usage personnel et non commercial
All informations and diagrams are published freely (freeware) and are intended for a private use and a non commercial use.

Below, the IPS diagram that I have tested, it is fully based on Ossie Callanan's original diagram.

Clock frequency : 100Hz square wave DTC 50%
Current flow from B1, B2 set to about 1A with R1 and R3

The clock input is connected to a function generator Centrad GF-763AF used as a square wave generator.
Below the IPS circuit v1.1 during the test :

The power output is indeniable, a small humming noise can be heard while the light bulb brights at full power...

Above : The voltage curves of the batteries B1 and B2 during the IPS test ( the old battery B1 seems damaged ).

( 02-20-04 ) Tests results : In this new test, the previous 15 Watts light bulb has been replaced with a 11 Watts Eco lamp which gives about 60 Watts of apparent light. The two analog ammeters have been removed from the circuit.

Its seems interesting to notice that :

during at least one hour, at the begining of the test, the voltage of the two batteries remains very stable,
during the whole test the voltage of the batterie B2 has only dropped of 0.17 Volts ( -1.3% ) while one ampere is drawn from each battery and the light bulb brights fully at the IPS output.
I have used old car batteries and the voltage drops of the batterie B1 is probably due to the failure of this old batterie.

This new IPS test is more encouraging than the previous one and more tests need to be soon conducted with a new batterie B1...