Emerson Powerdrive F300 - Page 174

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174 Powerdrive F300 User Guide
Issue Number: 2
VM_HIGH_DC_VOLTAGE Range applied to parameters showing high DC voltage
Units V
Range of [MIN] 0
Range of [MAX] 0 to 1500
Definition
VM_HIGH_DC_VOLTAGE[MAX] is the full scale d.c. link voltage feedback for the high d.c. link voltage measurement
which can measure the voltage if it goes above the normal full scale value. This level is drive voltage rating dependent.
See Table 11-4
VM_HIGH_DC_VOLTAGE[MIN] = 0
VM_LOW_UNDER_VOLTS Range applied the low under-voltage threshold
Units V
Range of [MIN] 24
Range of [MAX] 24 to 1150
Definition
If Back-up Mode Enable (06.068) = 0:
VM_LOW_UNDER_VOLTS[MAX] = VM_STD_UNDER_VOLTS[MIN]
If Back-up Mode Enable (06.068) = 1:
VM_LOW_UNDER_VOLTS[MAX] = VM_STD_UNDER_VOLTS[MIN] / 1.1.
VM_LOW_UNDER_VOLTS[MIN] = 24.
VM_MOTOR1_CURRENT_LIMIT
Range applied to current limit parameters
VM_MOTOR2_CURRENT_LIMIT
Units %
Range of [MIN] 0.0
Range of [MAX] 0.0 to 1000.0
Definition
VM_MOTOR1_CURRENT_LIMIT[MIN] = 0.0
Open-loop
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
Tlimit
/ I
Trated
) x 100 %
Where:
I
Tlimit
= I
MaxRef
x cos(sin
-1
(I
Mrated
/ I
MaxRef
))
I
Mrated
= Pr 05.007 sin φ
I
Trated
= Pr 05.007 x cos φ
cos φ = Pr 05.010
I
MaxRef
is the lower of 0.7 x Pr 11.061 or 1.1 x Pr 11.060.
RFC-A
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
Tlimit
/ I
Trated
) x 100 %
Where:
I
Tlimit
= I
MaxRef
x cos(sin
-1
(I
Mrated
/ I
MaxRef
))
I
Mrated
= Pr 05.007 x cos φ
1
ITrated = Pr 05.007 x sin φ
1
φ
1
= cos-1 (Pr 05.010) + φ
2
. φ
1
is calculated during an autotune. See the variable minimum / maximum calculations
in the Parameter Reference Guide for more information regarding φ
2
.
I
MaxRef
is the lower of 0.9 x Pr 11.061 or 1.1 x Pr 11.060.
RFC-S and Regen
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
MaxRef
/ Pr 05.007) x 100 %
Where:
I
MaxRef
is the lower of 0.9 x Pr 11.061 or 1.1 x Pr 11.060.
For VM_MOTOR2_CURRENT_LIMIT[MAX] use Pr 21.007 instead of Pr 05.007 and Pr 21.010 instead of Pr 05.010.