ElmoMC SimplIQ Servo Drives Composer User Manual - Manual (Page 98)

Transfer function A mathematical expression or a graph that expresses
the relationship between the outgoing and the
incoming signals of a process or control element. An
important property of motors is that their response to a
pure sinusoidal current signal is also sinusoidal at the
same frequency. Suppose a pure sinusoidal current
signal at frequency
ω
and amplitude A is injected
into a motor, and the motor speed is sinusoidal with an
amplitude
B and phase
ϕ
relative to the current
signal. The transfer function of the motor at the
frequency
ω
therefore has an amplitude and
phase
A B /
ϕ
(Figure G-4).
Figure G-4: A Transfer Function with 1.66
Amplitude and -90º phase
Trigger logic A pulse that activates a function (either high or low).
Elmo Composer User Manual Glossary
MAN-COMPUM (Ver. 1.9)
G-6