Unidrive M400 User Guide
93
Issue Number: 2
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 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 duty).
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 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.
Heavy duty).
For VM_MOTOR2_CURRENT_LIMIT[MAX] use Pr
21.007
instead of Pr
05.007
and Pr
21.010
instead of Pr
05.010
.
VM_NEGATIVE_REF_CLAMP1
Limits applied to the negative frequency or speed clamp
VM_NEGATIVE_REF_CLAMP2
Units
Hz
Range of [MIN]
Open-loop: -550.00 to 0.00
RFC-A: -550.00 to 0.00
Range of [MAX]
Open-loop: 0.00 to 550.00
RFC-A: 0.00 to 50000.00
Definition
VM_NEGATIVE_REF_CLAMP2 is defined in the same way except that Pr
21.001
is used instead of Pr
01.006
Negative Reference
Clamp Enable
(01.008)
Bipolar
Reference
Enable
(01.010)
VM_NEGATIVE_REF_CLAMP1[MIN]
VM_NEGATIVE_REF_CLA
MP1[MAX]
0
0
0.00
Pr
01.006
0
1
0.00
0.00
1
X
-VM_POSITIVE_REF_CLAMP[MAX]
0.00
VM_POSITIVE_REF_CLAMP
Limits applied to the positive frequency or speed reference clamp
Units
Hz
Range of [MIN]
Open-loop: 0.00
RFC-A: 0.00
Range of [MAX]
Open-loop: 550.00
RFC-A: 550.00
Definition
In all modes VM_POSITIVE_REF_CLAMP[MAX] is fixed at 550.00
In all modes VM_POSITIVE_REF_CLAMP[MIN] is fixed at 0.0
Summary of Contents for Unidrive M400
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