Kruger Ecowatt K320 Series Operation Manual page 130

Ecowatt Drive K320 series
®
Step 5: Closed-loop vector pilot-run
Set P00.00=3, and carry out closed-loop vector control, adjust P00.10 and speed loop and
current loop PI parameter in P03 group to make it run stably in the whole range.
Step 6: Flux-weakening control
Set flux-weakening regulator gain P03.26=0–8000, and observe the flux-weakening control
effect. P03.22–P03.24 can be adjusted as needed.
2. Commissioning procedures for closed-loop vector control of synchronous motor
Step 1: Set P00.18=1, restore to default value
Step 2: Set P00.00=3 (FVC), set P00.03, P00.04, and motor nameplate parameters in P02 group.
Step 3: Set P20.01 encoder parameter.
When the encoder is resolver-type encoder, set the encoder pulse count value to
(resolver pole pair number × 1024), e.g., if pole pair number is 4, set P20.01 to 4096.
Step 4: Ensure the encoder is installed and set correctly
When motor stops, observe whether P18.21 (resolver angle) fluctuates, if it fluctuates
sharply, check the wiring and grounding. Rotates the motor slowly, observe whether
P18.21 changes accordingly. If yes, it indicates motor is connected correctly; if the value
of P18.02 keeps constant at a non-zero value after rotating for multiple circles, it
indicates encoder Z signal is correct.
Step 5: Autotuning of initial position of magnetic pole
Set P20.11=2 or 3 (3: rotary autotuning; 2: static autotuning), press RUN key to run the
VFD.
a) Rotary autotuning (P20.11 = 3)
Detect the position of current magnetic pole when autotuning starts, and then accelerates to
10Hz, autotuning corresponding magnetic pole position of encoder Z pulse, and decelerate to
stop.
During running, if ENC1O or ENC1D fault occurred, set P20.02=1 and carry out autotuning again.
After autotuning is done, the angle obtained from autotuning will be saved in P20.09 and
P20.10 automatically.
b) Static autotuning
In cases where the load can be disconnected, it is recommended to adopt rotary autotuning
(P20.11=3) as it has high angle precision. If the load cannot be disconnected, users can adopt
static autotuning (P20.11=2). The magnetic pole position obtained from autotuning will be
saved in P20.09 and P20.10.
Step 6: Closed-loop vector pilot-run
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Basic operation guidelines