Lenze i700 User Manual

Lenze · i700 servo inverter · reference manual · DMS 3.0 EN · 06/2016 · TD06 142
5 Motor control & motor settings
5.13 Parameterising filter elements in the setpoint path
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5.13 Parameterising filter elements in the setpoint path
5.13.1 Jerk limitation
Max. acceleration change
0x2945 | 0x3145 - Torque: Setpoint jerk limitation
5.13.2 Notch filters (band-stop filters)
Due to the high dynamic performance or the high limit frequency of the closed current control loop,
mechanical natural frequencies can be excited, which can result in resonance and thus cause the
speed control loop to become unstable.
In order to suppress or damp these resonant frequencies, two notch filters are integrated in the
speed control loop of the controller, which can be parameterised. In the Lenze setting, these filters
are switched off:
[5-9] Optional notch filters (filter cascade) in the speed control loop
Use of the notch filters depending on the resonant frequency
Setting range (min. value | unit | max. value) Lenze setting
0.1 % 400.0 400.0 %
 Write access  CINH  OSC  P  RX  TX Scaling: 1/10 UNSIGNED_16
Axis A Axis B
m = Output of the jerk limitation
0x2944:3
0x2944:2
0x2944:1
Filter 1
0x2944:6
0x2944:5
0x2944:4
Filter 2
mm*
Frequency [Hz]
Width [Hz]
Depth [dB]
Frequency [Hz]
Width [Hz]
Depth [dB]
0x3144:3
0x3144:2
0x3144:1
Filter 1
0x3144:6
0x3144:5
0x3144:4
Filter 2
mm*
Frequency [Hz]
Width [Hz]
Depth [dB]
Frequency [Hz]
Width [Hz]
Depth [dB]
 Stop!
Improperly set notch filters have a negative effect on the response and disturbance
behaviour of the speed control:
• Increased overshoot of the motor speed in case of response behaviour
• Higher speed deviations (extreme case: Complete instability of the drive) in case of
disturbance behaviour
In the case of impairment,
• the drive that is still running must either be coasted down by activating the controller
inhibit or immediately be brought to a standstill via a brake.
• the speed controller must be optimised again afterwards.
• the test procedure must be repeated. Setting the notch filters

Lenze i700 Specifications

General

Control Type	Vector control, V/f control
Safety	STO (Safe Torque Off)
Protection Class	IP20
Frequency	50/60 Hz
Communication Interfaces	CANopen
Cooling	Air cooled
Protection Features	Overvoltage, Undervoltage
Ambient Temperature	-10°C to +45°C
Frequency Range	0 Hz to 300 Hz
Supply Voltage	3-phase AC