Lenze 8400 motec - 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 C00070/3 and reset time Tn in C00071/3 .
4. Repeat steps 1 ... 3 until the optimum ramp response is reached.
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Vp < Vp opt. Vp = Vp opt. Vp > Vp opt.
Tn
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>
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opt.