Paul351W
Member
I have an application using an eddy current coupling to transmit torque from an AC motor to a brake module. The coupling is needed so the AC motor can be disconnected from the drive line for inertia reasons during stop tests.
Due to the eddy coupling characteristics, there will be a large speed delta between input and output when load is applied. The operator wants to maintain output speed while load is applied, so I will have to ramp up the input speed as the coupling begins to slip under load.
Question is: which would be better for this application, a ladder logic PID instruction, or the function block PIDE instruction? All I've ever used the PIDE for is some pressure control, and that was mostly feed-forward activated.
Due to the eddy coupling characteristics, there will be a large speed delta between input and output when load is applied. The operator wants to maintain output speed while load is applied, so I will have to ramp up the input speed as the coupling begins to slip under load.
Question is: which would be better for this application, a ladder logic PID instruction, or the function block PIDE instruction? All I've ever used the PIDE for is some pressure control, and that was mostly feed-forward activated.