Delta MS300 Series User Manual page 477

Chapter 12 Description of Parameter SettingsMS300
Adjust the setting of FOC speed observer and per-unit value of inertia (common problems)
8.
 Pr.10-25: Set up FOC bandwidth of speed observer
Situation 1. Speed command changes rapidly, but speed response cannot follow.
(Speed response is too slow→Increase the setting value)
Situation 2. The noise of the observer is too large, and causes the operation diverged.
(Speed noise is too large→Decrease)
 Pr.11-01: Set up per unit of system inertia
Situation 1. The inrush current is too high at start-up, and causes an oc error.
Situation 2. An ocn error occurs during RUN or STOP, and the motor runs randomly.
a.
b.
IMFOC Sensorless adjustment parameters

Refer to Section 12-1 Description of Parameter Settings for more details
Parameter
00-11
01-01
01-02
05-00
05-02
05-03
05-04
05-05
05-06
05-07
05-08
Check Pr.11-01 whether the JM per-unit of system inertia is too large.
Decrease Pr.10-25 FOC bandwidth for speed observer or Pr.11-05 zero-speed
bandwidth.
Description
Speed control mode
Rated frequency (Hz)
Rated voltage (V
AC
Motor parameter auto-tuning
Rated power for induction motor
1 (kW)
Rated speed for induction motor 1
(rpm)
Number of poles for induction
motor 1 (poles)
No-load current for induction
motor 1 (A)
Stator resistance (Rs) for induction
motor 1 (Ω)
Rotor resistance (Rr) for induction
motor 1 (Ω)
Magnetizing inductance (Lm) for
induction motor 1 (mH)
Unit
Hz
) V
kW
rpm
Ω
Ω
mH
468
Default Settings
0
60.00 / 50.00 0.00–599.00
Depending on
Depending on
the model
the model power
power
0 0–13
Depending on
0.00–655.35
the model
power
0–xxxx
Depending on
the motor's (Depending on
the motor's
number of
poles number of poles)
4 2–20
Depending on
0.00–Pr.05-01
the model
default
power
Depending on
0.000–65.535
the model
power
0.000 0.000–65.535
0.0 0.0–6553.5
0–7