The motor control has been optimised so that motors can also be operated with fout≥650Hz.
8400 StateLine, HighLine and TopLine: FW version ≤ 13.00.00.00
What happens?
If the output frequency on the inverter is fout≥650Hz, heavy vibrations in the motor current can be observed. An overcurrent or short-circuit current monitoring function will possibly respond.
When does the problem occur?
All motor control types are affected. Starting from an inverter output frequency of fout=650Hz, the voltage angle is set incorrectly. In the case of the SC-PSM control type, the response has not such a distinct impact, since the voltage angle is set newly and therefore correctly every 500µs with each new piece of pole position information.
Diagnostics options?
The motor current and the output frequency fout of the inverter are to be observed using PCAN or the Engineer oscilloscope. If, starting from fout =650Hz, very heavy vibrations in the motor current can be abruptly detected, this can be considered as an indicator of the response described.
Short-term measures/recommendations?
None.
Evaluation:
Operation of an ASM with f ≥ 650Hz is not possible. Operation of an SM with f ≥ 650Hz is unstable. Applications with a required output frequency fout ≥ 650Hz are rare.
C011 or the motor parameters causing a change-over in the frequency resolution are typically only altered during the configuration and commissioning. Only then the response has an effect.
