5motor control (mctrl) – Lenze 8400 motec User Manual
Page 138
5
Motor control (MCTRL)
5.9
Sensorless control for synchronous motors (SLPSM)
138
Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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How to optimise the speed controller setting by means of the ramp response:
1. Run a typical speed profile and record the ramp response of the speed using the data
logger.
• Motor control variables to be recorded:
nSpeedSetValue_a (speed setpoint)
nMotorSpeedAct_a (actual speed value)
2. Evaluate the ramp response:
• Solid line = ramp response (actual speed value)
• Dash line = speed setpoint
3. Change gain Vp in
and reset time Tn in
4. Repeat steps 1 ... 3 until the optimum ramp response is reached.
n
t
n
t
n
t
n
t
n
t
n
t
n
t
n
t
n
t
Vp < Vp opt.
Vp = Vp opt.
Vp > Vp opt.
Tn
<
T
n
opt.
Tn
=
T
n
opt.
Tn
>
T
n
opt.