I am trying to understand why electric propeller governors are not (yet) prevalent given that they offer the ability to control the RPM with high accuracy. What is the typical architecture for an electric governor or electronically controlled governor? What are their pros and con?
As far as I know, there are two types of electric governors:
The governor has an electric actuator in the propeller hub like the Airmaster Governor. This removes a lever, but adds a number of switches in the cabin.
The governor is still hydraulic, but an electric actuator controls its position. (I think the PC-12 and TBM700 work like this?)
I am assuming that option 2 is not ideal as you need a separate actuator to control the governor cable.
I guess I do not understand how airplanes like a PC-12 or TBM700 (that only have a single lever in the cabin) regulate propeller RPM.