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18-06-08 PVD3668_GB_GVM_June_2018
3.1.5. Current limitation at stall conditions (i.e. speed < 3 rpm)
Recommended reduced current at speed < 3 rpm:
Warning: The current must be limited to the prescribed values. If the nominal
torque has to be maintained at stop or low speed (< 3 rpm), the current must
not exceed 70% of I
0
(permanent current at low speed), in order to avoid any
excessive overheating of the motor.
Please refer to the inverter technical documentation for any further
information and to choose functions to program the drive.
3.1.6. Peak current limitations
It is possible to use the GVM motors with a current higher than the permanent current (In).
But, to avoid any overheating, the following rules must be respected.
1) The peak currents and peak torques given in the data sheet must never be exceeded
2) The thermal equivalent torque must be respected (§3.1.3)
Mrms=<Mn or Irms=<In
If 1) and 2) are achieved (it can limit the peak current value or duration), the peak current
duration (tp) might be limited, in order to maintain the copper heating below the nominal
heating value.
0
0.5
1
1.5
2
2.5
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