Chapter 12 Description of Parameter Settings|CFP2000 Series
12.1-06-2
load, the over-voltage won’t occur during deceleration and fulfill the setting of deceleration time.
Sometimes, it may not stop due to over-voltage during decelerating to stop when increasing the
load regenerative inertia. At this moment, the AC drive will auto add the deceleration time until
drive stop.
Pr.06-02 is set to 0: During deceleration, the DC bus voltage may exceed its maximum allowable
value due to motor regeneration in some situation, such as loading inertia is too high or decel.
Time is set too short. When traditional over-voltage stall prevention is enabled, the drive will not
decelerate further and keep the output frequency constant until the voltage drops below the
setting value again.
When Pr.06-02 is set to 1, the drive will maintain DCbus voltage when decelerating and prevent
OV.
Output
frequency
Deceleration characteristic
when Over-Voltage Stall
Prevention enabled
Frequency Held
previous deceleration time
Time
Time
High-voltage
at DC side
Over-voltage
detection
level
required time for decelerating to 0Hz when over-voltage
stall prevention is enabled.
Output Frequency
DCBUS Voltage
310Vdc
370Vdc
Time
230V Series
60Hz
0
When the over-voltage stall prevention is enabled, drive deceleration time will be larger than the
setting.
When there is any problem as using deceleration time, refer to the following items to solve it.
1. Add the suitable deceleration time.
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