Lenze i700 User Manual

Lenze · i700 servo inverter · reference manual · DMS 3.0 EN · 06/2016 · TD06 82
5 Motor control & motor settings
5.8 Setting the motor parameters for the servo control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5.8.2.3 Determine motor parameters automatically via "motor parameter identification"
Functional description
The motor parameters listed in the table below can be determined automatically via the motor
parameter identification function if they are not known. The resistance values are converted via the
actual motor temperature into values that correspond to a temperature of 20°C. If a thermal
detector is not connected, a temperature value of 90°C is assumed.
Sequence of the motor parameter identification
The apparent resistance of the plant is determined for approx. 30 different frequencies. Then a
mathematical procedure is used to extract the electrical parameters of the motor.
• Since the procedure starts with very low frequencies and always considers several complete
periods, the whole process takes approx. 3 minutes.
• During the procedure, the motor is energised with a current, the r.m.s. value of which
corresponds to the lower of the following two values:
 Tip!
If an asynchronous motor is to be identified, the identification should be executed with half
the rated motor current in order to achieve an optimal result. For this purpose, the rated
device current has to be higher than half the rated motor current. In case of a synchronous
motor, this is irrelevant.
 Danger!
This procedure may only be carried out during commissioning, not during operation!
• During the procedure the motor is energised so that:
• it cannot be excluded that the connected mechanical components may move!
• the windings heat up.
If you repeat the procedure, ensure that the motor is not thermally overloaded
(particularly if no temperature feedback is used).
Object Name Required for
Axis A Axis B
SM ASM
0x2C01:2
0x3401:2 Motor: Stator resistance (value at 20°C) 
0x2C01:3
0x3401:3 Motor: Stator leakage inductance (L
ss
) 
0x2C02:1
0x3402:1 Motor (ASM): Rotor resistance (value at 20 °C) 
0x2C02:2
0x3402:2 Motor (ASM): Mutual inductance (L
h
) 
0x2C02:3
0x3402:3 Motor (ASM): Magnetising current 
or
Rated device current
1
2
---
Rated motor current⋅

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