Why Use Transorbs Instead of Diodes in a Generator Rotor Circuit?

[OddBod]

is there some special reason why transorbs would be inserted into the rotor circuit of a capacitor controlled generator, rather than diodes? And since I have no way of determining the value of the existing transorbs, could I simply substitute diodes.
Diodes are the "normally" expected component in this position, with a shunt resistor across them.

 

[Baluncore]

Commutator or brush noise interrupts the inductive circuit and generates high voltage spikes that can break down the rotor winding insulation. A transorb will limit the voltage of those noise spikes and so increase reliability. The voltage rating of the transorb should be greater than the rotor voltage.

 

[zoki85]

The solution with brushes and commutator is old and requires more maintenance than other methods used today. The brushes generate HVHF spikes, especially after being in longer service, but breakdowns of the winding insulation are/were rare due to such stress

 

[OddBod]

Neither of the answers have any relevance to the question in that capacitor controlled generators do not have brushes or commutators

 

[Baluncore]

Neither of the answers have any relevance to the question in that capacitor controlled generators do not have brushes or commutators

If only the world was that simple.
“Capacitor controlled generator” is an insufficient description.
I'm sorry but my mind reading is still not fully functional.

Is it an induction generator that uses capacitors to excite and set the output frequency?
Is it a brushless marine generator that has two armatures, normally with diodes between the armatures?
Does it generate AC or DC?
Please give us a link to the type of generator you ask about.

 

[zoki85]

Neither of the answers have any relevance to the question in that capacitor controlled generators do not have brushes or commutators

Never heard of "capacitor controlled generators"... Do they grow in the woods?
Anyway, if you're just interested in application of DC TVS and AC TVS , the basics are explained here
Have a nice day.