Nidec Unidrive M200 User Manual page 73

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), otherwise it is the lower of 0.7 x Pr 11.061 or 1.1 x Pr 11.060 (i.e. Normal 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:
RFC-A
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
Where:
Unidrive M200 / M201 Control User Guide
Issue Number: 2
Electrical Getting Basic
installation started parameters
Range applied to current limit parameters (motor 1)
I
Tlimit
I
Trated
-1
I = I x cos(sin (I
Tlimit MaxRef Mrated
= Pr 05.007 sin 
I
Mrated
= Pr 05.007 x cos 
I
Trated
cos  = 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
(MOTOR2_CURRENT_LIMIT_MAX is calculated from the motor map 2 parameters)
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, otherwise it is (1.1 x Maximum motor rated current).
rated active current = power factor x motor rated current
rated magnetising current = (1 - power factor
-1
I = I x cos(sin (I
Tlimit MaxRef Mrated
= Pr 05.007 x sin 
I
Mrated 1
= Pr 05.007 x cos 
I
Trated 1
-1
 (Pr 05.010) +  . 
= cos
1 2 1
in the Parameter Reference Guide for more information regarding 
I is 0.9 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.
MaxRef
Heavy duty), otherwise it is the lower of 0.9 x Pr 11.061 or 1.1 x Pr 11.060 (i.e. Normal Duty).
Running the
Optimization
motor
I
Mrated
/ I ) x 100 %
Tlimit Trated
/ I ))
MaxRef
Maximum current
------------------------------------------------------ -
Motor rated current
--------------------------------------------------------------------------------------------------------
=
PF
2
) x motor rated current
/ I ) x 100 %
Tlimit Trated
/ I ))
MaxRef
is calculated during an autotune. See the variable minimum / maximum calculations
NV Media Onboard Advanced
Card PLC parameters
I
maxref
I
Rated
2
2
 
+ PF – 1

100%
.
2
Diagnostics UL Listing
73