dedeleco wrote:I did a quick coupling test with some wires I did not have time to get the right connectors
however in low voltage 1100tr / mm with a drill I get 1,50 vol
Logic, since the voltage is proportional to the current in the excitation (in series, the same current as in the armature) and thus by measuring the empty voltage of the empty dynamo which discharges on nothing, without this current of excitement, we get almost nothing (residual field or residual) !!
I advise to apply the advice:an interresting solution is to connect the excitement on a battery: it behaves like a permanent magnet motor
with a rheostat in series to get the typical excitation current (0,14A) by measuring before the resistance of the shunt excitation and series, not to stay in the shoe polish and to understand the courses and basic links that I indicated !!! !!
that's what I say the winding exitation serie is worth nothing for a dynamo alone: there would be exitation if there is current output!
the shunt excitation winding must be used: it is powered by the voltage generated by the rotor whatever the current consumed by the load
of course without regulator the output voltage will drop when the current will increase, we can use in addition the series winding so that the increase of the output current makes an additional exitation: it is old principle that allowed to dispense with electronic regulator
1 rheostat in series with shunt winding to regulate voltage
1 rheostat in parallel with the series winding to regulate the efficiency of the current compensation
but for a test does not break the head puts the shunt winding in parallel on the rotor is it will go off thoroughly and make trouble the drill that rotates
tries the 2 sense of branching, only one of 2 agrees with remanent induction
in the exceptional case where it is completely demagnetized plugs any source of direct current su excitement shunt: battery or charger of battery
that without