tacho generator

hello everyone.

does anyone know why the tachogenerator voltage has to be less than input voltage ?

Maybe.
It depends.

What tacho? What motor? Input voltage to what?

Are you perhaps talking about using the motor itself as a tacho between drive pulses?

You need to explain your question in full.

Russell.

engineer-999:
hello everyone.

does anyone know why the tachogenerator voltage has to be less than input voltage ?

Read the sticky thread on how to post a question here, please...