Hi, all
I`m now designing a dc motor controller for turntable.
I decided to use tachometer feedback and apply LM2917 frequency-to-voltage converter. In application notes I got three circuits: first circuit gives something like PWM and is not suitable for turntable.
Second gives proportional regulation, but it has "poor load regulation".
About third circuit I know only that it employs IC acting like shunt mode regulator.
So can you tell me what does mean here "poor load regulation" and which circuit (2,3) will be more suitable for turntable rpms controller? (My turntable is Polish UNITRA G-602)
Here is a link to app.notes:
http://www.ti.com/lit/an/snaa088/snaa088.pdf
Thanks in advance,
and sorry for my English
Michael.
I`m now designing a dc motor controller for turntable.
I decided to use tachometer feedback and apply LM2917 frequency-to-voltage converter. In application notes I got three circuits: first circuit gives something like PWM and is not suitable for turntable.
Second gives proportional regulation, but it has "poor load regulation".
About third circuit I know only that it employs IC acting like shunt mode regulator.
So can you tell me what does mean here "poor load regulation" and which circuit (2,3) will be more suitable for turntable rpms controller? (My turntable is Polish UNITRA G-602)
Here is a link to app.notes:
http://www.ti.com/lit/an/snaa088/snaa088.pdf
Thanks in advance,
and sorry for my English
Michael.