Emerson Unidrive M100 Control User Manual page 49

Safety Product Mechanical
information information installation
VM_MOTOR1_CURRENT_LIMIT
Units %
Range of [MIN] 0.0
Range of [MAX] 0.0 to 1000.0
VM_MOTOR1_CURRENT_LIMIT[MAX] is dependent on the drive rating and motor set-up parameters.
VM_MOTOR1_CURRENT_LIMIT[MIN] = 0.0
Open-loop
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
Where:
I
MaxRef
duty).
Definition
Where:
For example, with a motor of the same rating as the drive and a power factor of 0.85, the maximum current limit is
165.2%.
The rated active and rated magnetising currents are calculated from the power factor (Pr 05.010) and motor rated
current (Pr 05.007) as:
VM_NEGATIVE_REF_CLAMP1
Units Hz
Range of [MIN] -550.00 to 0.00
Range of [MAX] 0.00 to 550.00
This variable maximum/minimum defines the range of the negative frequency clamp associated with motor map 1
(Minimum Reference Clamp (01.007)). The minimum and maximum are affected by the settings of the Negative
Reference Clamp Enable (01.008), Bipolar Reference Enable (01.010) and Maximum Reference Clamp (01.006) as
shown in the table below.
Reference Clamp
Definition
VM_POSITIVE_REF_CLAMP
Units Hz
Range of [MIN] 0.00
Range of [MAX] 550.00
VM_POSITIVE_REF_CLAMP[MAX] defines the range of the positive reference clamp, Maximum Reference Clamp
Definition
(01.006), which in turn limit the references.
Unidrive M100 / M101 Control User Guide
Issue Number: 1
Electrical Getting
installation started parameters
Range applied to current limit parameters (motor 1)
-1
I = I x cos(sin (I
Tlimit MaxRef Mrated
I = Pr 05.007 sin φ
Mrated
I = Pr 05.007 x cos φ
Trated
cos φ = Pr 05.010
is 0.7 x Pr 11.061 when the motor rated current set in Pr 05.007 is less than or equal to Pr 11.032 (i.e. Heavy
MOTOR1_CURRENT_LIMIT_MAX
Motor rated current is given by Pr 05.007
PF is motor rated power factor given by Pr 05.010
The Maximum current is (1.5 x Rated drive current) when the rated current set by Pr 05.007 is less than or equal to
the Maximum Heavy Duty current rating specified in Pr 11.032.
rated active current = power factor x motor rated current
rated magnetising current = √(1 - power factor
Limits applied to the negative frequency clamp (motor 1)
Negative Bipolar
Reference
Enable (01.008) Enable (01.010)
0 0
0 1
1 X
Limits applied to the positive frequency reference clamp
Basic Running the
Optimization
motor
/ I ) x 100 %
Tlimit Trated
/ I ))
MaxRef
Maximum current
------------------------------------------------------ -
Motor rated current
--------------------------------------------------------------------------------------------------------
=
PF
2
) x motor rated current
VM_NEGATIVE_REF_
CLAMP1[MIN]
0.00
0.00
-
VM_POSITIVE_REF_CLAMP[MAX]
Advanced
NV Media Card Diagnostics
parameters
2
2
+ ( PF ) – 1
×
100%
VM_NEGATIVE_REF_
CLAMP1[MAX]
Pr 01.006
0.00
0.00
UL Listing
49