Zapi ACE3, Руководство пользователя

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AFFZP0BB – ACE3 – User Manual Page – 71/139
7.4.1 Sin/cos-sensored case
Sin/Cos sensors have a sinusoidal output voltage, with variable amplitude and
offset, and normally sin/cos wave has an arbitrary shift with respect to magnetic field
“0” position. Offset, amplitude and angle must be set before starting a PM for the
first time.
Preliminary settings are the same described above. Plus, an automatic procedure,
embedded in the inverter software, must be activated only one time at
commissioning, to let the inverter acquire the values.
Before starting the procedure, please be sure that the motor is free to spin, with a
minimum load on the shaft.
- In OPTIONS, select ABS SENS. ACQUIRE.
- Select NO at the request of saving data (otherwise the main coil will be
opened).
- A message ACQUIRING ABS indicates that the acquisition procedure is
ready to start.
- Use the TESTER function to monitor the motor speed for the further steps.
- Activate the TILLER and FW (or BW) microswitches. Motor starts running in
open-loop mode.
- Because of the open-loop mode, it is normal if the reported speed is not
perfectly stable, but value on display must be, in any case, quite fixed.
- If the motor does not spin, it vibrates or speed on display oscillates too
much, stop the acquisition procedure releasing the FW or BW command
(see troubleshooting at the paragraph end).
- The first phase, where motor is spinning at low speed (something like 5Hz),
allows the Inverter to acquire signal offset and amplitude for both channels.
- After the previous steps are completed, rotor is aligned to the magnetic field
origin, and the angle between sin/cos zero value is acquired and stored.
- The next part is a sort of verification when motor is accelerated up to 50 Hz
in closed-loop mode.
- Because of the closed loop, the speed reported on display must be stable.
- If something has gone wrong (rotor is not correctly aligned because of
friction on the shaft or any other problem), it is possible that rotor starts
spinning at uncontrolled speed with high current absorption. The only way to
stop it is by switching the inverter off using the key switch.
- When the procedure is correctly completed, the main contactor opens and
display shows ACQUIRE END.
- Turn off and then on again the key switch; verify that motor can run
according to the accelerator input in both direction.
Inverter goes down the procedure automatically, every phase is marked by a
different message on display.
In case of problems, mainly in the first phase, please:
- Check that PM motor pole pairs is set correctly.