Inovance MD500T75G - Page 154

7. Description of Parameters MD500 User Manual
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Function Code Parameter Name Setting Range Default
F3-18 Overcurrent stall prevention level 50% to 200% 150%
) Overcurrent stall
prevention selection
0: Disabled
1: Enabled
1
F3-20 Overcurrent stall prevention gain 0 to 100 20
F3-21 Speed multiplying overcurrent
stall prevention level
compensation factor
50% to 200% 0
In the high frequency area, the motor drive current is small and bigger motor speed drop is caused by stall current compared with
below the rated frequency. To improve the motor running characteristic, you can lower the overcurrent stall prevention level above
the rated frequency.
The overcurrent stall prevention function above the rated frequency helps to improve the acceleration performance in the
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inertia is large.
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ƕ fs: running frequency
ƕ fn: rated motor frequency
ƕ k: speed multiplying overcurrent stall prevention level compensation factor (F3-21)
ƕ LimitCur: Overcurrent stall prevention level (F3-18)
Figure 7-42 Overcurrent stall prevention above the rated frequency
Rated frequency
Twice of rated
fruquency
Overcurrent stall
prevention level above
the rated frequency
Note
ƕ The overcurrent stall prevention level 150% indicates 1.5 times of the rated current of the AC drive.
ƕ For high-power motor with carrier frequency below 2 kHz, lower the overcurrent stall prevention level.
This is because the fast current limit function is enabled in advance of the overcurrent stall prevention
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