5motor control (mctrl) – Lenze 8400 User Manual
Page 137
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
137
5
Motor control (MCTRL)
5.1
Motor selection/Motor data
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Preconditions
The motor parameters listed in the table below are excluded from automatic identification and
must therefore be adapted to the used motor before motor parameter identification is carried out
(see motor nameplate).
Furthermore, the available motor cable must be specified in terms of length and cross-section:
Sequence of the motor parameter identification
1. The motor stator resistance (
) is measured.
2. The inverter error characteristic is measured.
3. The motor stator leakage inductance (
) is measured.
4. The V/f base frequency (
) is calculated.
5. The slip compensation (
) is calculated.
6. The V
min
) is detected.
7. Only for asynchronous motors: The motor magnetising inductance (
) and the motor
rotor resistance (
) are measured.
8. Only for asynchronous motors: The motor magnetising current (
) is measured.
Parameter
Info
Rated motor power
Rated motor speed
Rated motor current
Rated motor frequency
Rated motor voltage
Motor cos ϕ
Note!
If the motor nameplate data are entered in the »Engineer« motor catalogue instead of
selecting a motor, it is recommendable to use the extended motor parameter
identification (
= "2: extended identification").
Especially for third-party motors, it is also recommendable to carry out the slip
calculation with the motor equivalent circuit diagram data (
). If the slip
calculation is derived from the motor nameplate data, this can negatively affect the
stability and accuracy of the drive behaviour because the rated speed specified on the
motor nameplate often is rather inaccurate.
Parameter
Info
Motor cable length
Motor cable cross-section