Re: Alten A. van Kaick generator

Jan Kandziora schrieb:

The purpose of both resitors is output voltage control: The A..D resitor
controls the off-load voltage. The J' resistor controls the voltage shift
under electrical(!) load.


As the induction voltage is controlled by the exciting current, you can
control the off-load voltage with the A..D resistor. The lower the
resistance, the higher the off-load voltage.
Set it up so you get ~230V when the machine is at 1500rpm. If you aren't
fixed to 50Hz, you may choose the A..D resistor value == 0 and change the
engine speed instead.


The current in the J' line is conntrolled by the generator main current (See
the datasheet without the regulator) and the J' resistor. This, too, is a
part of the exciting current. Higher than zero main current through the
generator will let the voltage at it's main terminals drop. With the
resistor in J' line, you can control the load-depending exciting current
and such, the compensating voltage.
Set it up that way the output voltage is roughly the same under load and
without it. If the shift doesn't matter, choose the J' resitor value == 0.


If you choose the both the resitors values == 0, you get the highest
possible torque the machine accepts. This is

M=P/(2pi*n)=12kW/(2pi*25/s)=76Nm (for *both* A..D and J' resistor == 0 Ohm)

The drawback of this "high" torque (and current) is the the high voltage
shift under load. So you may want to make the J' resistor R>0. You may do
this but remember the resitors are limiting the minimum exciting current of
the generator. If the resistance of both this and the J' line resistor
value is *too high* for the torque you apply to the generator, the
generator will go out of sync ("topple") and therefore, your machines may
be damaged.

The safe value for both resistors is ZERO.

Thanks a lot to Jan and all the others' comments too. Now I have a fairly good understanding how this works and what to test under various loads.

Excellent newsgroup attitude. Thanks for understanding that I had to use English ;-)

best regards

Tor
.

Relevant Pages

  • Re: Phase splitter with capacitance load.
    ... have the same output voltage, EL, as they stand, if a further load is ... The IEEE Dictionary of electrical terms defines impedance, ... Consider the following resistor network. ... Now let's apply some additional load at nodes 2 ...
    (rec.audio.tubes)
  • Re: Voltage Regulator
    ... At first I thought a simple resistor divider would be ... And what kind of voltage regulation ... How much does your load current vary? ...
    (sci.electronics.basics)
  • Re: Flyback transformer design confusion!!
    ... When applying a constant DC voltage across a resistive ... load, just *how* can I increase the power into that load, other than by ... Iout is to change the resistor. ...
    (sci.electronics.design)
  • Re: Flyback transformer design confusion!!
    ... When applying a constant DC voltage across a resistive ... load, just *how* can I increase the power into that load, other than by ... Iout is to change the resistor. ...
    (sci.electronics.design)
  • Re: P2B-DS and generic slotkets
    ... The slockets are labeled "Cpu Card ... processors are requesting 2.0 volts instead of 1.65 volts. ... If R3 is a 56 ohm resistor, ... With regard to the voltage being requested, ...
    (alt.comp.periphs.mainboard.asus)