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DETAILED PARAMETER DESCRIPTION
P0151 - DC Link voltage regulation actuation level
Adjustable range: 106 to 1200 V Factory setting: 1118 V
Acesso: Menu → Configurations → Control
Description: Scalar mode (P0202 = 0, 1 or 2):
P0151 sets the voltage regulation level of the DC link to prevent overvoltage. This parameter, together with
P0152, allows two operation types to regulate the DC link voltage.
Regulation type of the DC link when P0152 = 0.00 and P0151 different from the maximum value:
Ramp holding - When the voltage of the DC link reaches the regulation level during deceleration, the deceleration
ramp time is extended and the speed is maintained at a constant value until the DC link voltage leaves the actuation
level. See Figure 5.16 on page 5-23. This voltage regulation of the DC link (ramp holding) tries to avoid the locking
of the inverter due to errors related to overvoltage on the DC link when the deceleration occurs with high inertia
loads or with short deceleration times.
P0151
DC link rated voltage
Output speed
Time
Overvoltage
DC link regulation level
Time
Figure 5.16: Deceleration with ramp holding
With this function, an optimized (minimum) deceleration time is obtained for the driven load.
This function is useful in medium inertia applications that require short deceleration ramps.
In case the supply line is permanently with overvoltage (DC link voltag > P0151), the inverter may not decelerate.
In this case, reduce the line voltage or increment P0151.
Regulation type of the DC link voltage when
P0152 > 0.00 and P0151 different from the maximum value:
When the DC link voltage reaches the regulation level during deceleration, the deceleration time is extended and
the motor is accelerate until the DC link leaves the actuation level. See Figure 5.16 on page 5-23 and Figure 5.17
on page 5-24.
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NOTE!
In case locking for overvoltage still occurs during deceleration, the valu of parameter P0152 must be
gradually increased or the deceleration ramp time (P0101 and/or P0103) must be increased. In case
the line is permanently with overvoltage (DC link voltage > P0151) the inverter may not decelerate.
Reduce the line voltage or increment P0151.
MVW3000 | 5-23
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