Lenze i700 User Manual

Lenze · i700 servo inverter · reference manual · DMS 3.0 EN · 06/2016 · TD06 106
5 Motor control & motor settings
5.10 Synchronous motor (SM): Pole position identification
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5.10.2.1 Adapt pole position identification PPI (360°)
For drives with a high static friction, mass inertia or alternating load, an optimisation may be
required:
• The amplitude of the current vector has to be set so high that the motor can be accelerated with
a high mass inertia.
• The cyclic continued rotation of the current vector by 22.5° has to cause an equivalent angular
rotation of the motor shaft (rotor). A step function has to be achieved as displayed in the figure
[5-2]
. Here, actual positions with very low overshoots are visible.
0x2C61 | 0x3461 - Pole position identification PPI (360°)
 Stop!
If there is no temperature monitoring in the motor and/or the I²xt motor monitoring and
the maximum current monitoring are not parameterised correctly, the motor might be
damaged permanently when the current amplitude is set too high!
Monitoring of the motor utilisation (I²xt)
( 254)
Monitoring of the ultimate motor current
( 271)
Sub. Name Lenze setting Data type
1 PPI (360°): Current amplitude 100 % UNSIGNED_16
2 PPI (360°): Ramp time 40 s UNSIGNED_16
3 PPI (360°): Direction of rotation 0: Field: CW UNSIGNED_8
4 PPI (360°): Error tolerance 20 ° UNSIGNED_8
5 PPI (360°): Absolute current amplitude UNSIGNED_32
Subindex 1: PPI (360°): Current amplitude
Adjustment of the current amplitude in percent
• For large machines and high mass inertia values or for linear direct drives, the current amplitude usually has to
be increased.
• A Lenze setting of "100 %" corresponds to 141 % of the rated motor current (0x6075
or 0x6875 for axis B).
Note!
If the current amplitude is set to > 100 %, the device utilisation (Ixt) monitoring and/or one of the motor monitoring
functions may respond and cause the abort of the pole position identification.
Setting range (min. value | unit | max. value) Lenze setting
1 % 1000 100 %
 Write access  CINH  OSC  P  RX  TX UNSIGNED_16
Subindex 2: PPI (360°): Ramp time
Adjustment of the ramp time in percent
• For large machines and high mass inertia values, the ramp time usually has to be increased.
• For small machines, a reduction of the ramp time can speed up the pole position identification process.
Setting range (min. value | unit | max. value) Lenze setting
1 s 600 40 s
 Write access  CINH  OSC  P  RX  TX UNSIGNED_16

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