Nidec H300 - Vm_Min_Switching_Frequency; Vm_Motor1_Current_Limit; Vm_Motor2_Current_Limit; Vm_Negative_Ref_Clamp1; Vm_Negative_Ref_Clamp2

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200 HVAC Drive H300
Issue Number: 3
VM_MIN_SWITCHING_FREQUENCY Range applied to the minimum switching frequency parameter
Units User units
Range of [MIN] 0
Range of [MAX] 0 to 6
Definition
VM_MIN_SWITCHING_FREQUENCY[MAX] = Maximum Switching Frequency (05.018)
VM_MIN_SWITCHING_FREQUENCY[MIN] = 0 for motor control modes, or 1 for Regen mode (subject to the
maximum)
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 the lower of 0.7 x Pr 11.061 or 1.1 x Pr
11.060 (i.e. Normal 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 sin φ
1
ITrated = Pr 05.007 x cos 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 the lower of 0.9 x Pr 11.061 or 1.1 x Pr
11.060 (i.e. Normal duty).
RFC-S and Regen
VM_MOTOR1_CURRENT_LIMIT[MAX] = (I
MaxRef
/ Pr 05.007) x 100 %
Where:
I
MaxRef
is 0.9 x Pr 11.061 when the motor rated current set in Pr 05.007 is the lower of 0.9 x Pr 11.061 or 1.1 x Pr
11.060 (i.e. Normal duty).
VM_NEGATIVE_REF_CLAMP1
Limits applied to the negative frequency or speed clamp
VM_NEGATIVE_REF_CLAMP2
Units
Open-loop: Hz
RFC-A, RFC-S: rpm or mm/s
Range of [MIN]
Open-loop: -550.0 to 0.0
RFC-A, RFC-S: -50000.0 to 0.0
Range of [MAX]
Open-loop: 0.0 to 550.0
RFC-A, RFC-S: 0.0 to 50000.0
Definition
Negative Reference
Clamp Enable (01.008)
Bipolar Reference
Enable (01.010)
VM_NEGATIVE_REF_
CLAMP1[MIN]
VM_NEGATIVE_REF_
CLAMP1[MAX]
00 0.0 Pr 01.006
01 0.0 0.0
1 X -VM_POSITIVE_REF_CLAMP[MAX] 0.0