Calculating The Equivalent Capacity Of The Higher Harmonic Generator - Mitsubishi Electric MDS-E Series Instruction Manual

MDS-E/EH Series Instruction Manual
15 Appx. 6: Higher Harmonic Suppression Measure Guidelines

15.1.1 Calculating the Equivalent Capacity of the Higher Harmonic Generator

As a principle, the higher harmonic suppression measure guidelines must be followed by the customer.
(1) Calculating the total equivalent capacity (Step 1)
Calculate the total equivalent capacity with the following expression.
Unit type Rated
MDS- input
capacity
E- EH-
pi [kVA]
SP-20 - 0.97
SP-40 SP-20 2.81
SP-80 SP-40 6.77
SP-160 SP-80 13.1
SP-200 SP-100 21.8
SP-240 - 25.9
SP-320 SP-160 34.7
SP-400 SP-200 42.8
SP-640 SP-320 63.7
SP-480 86.8
SP-600 120.2
(Note) The rated capacity Pi above, is the value used to calculate whether the product corresponds to the higher
harmonic guidelines. Thus, the value will differ from the actual power facility's capacity.
(The power supply unit is not included.)
Name
Servo drive unit MDS-E/EH-V1/V2/V3 Series
Spindle drive unit MDS-E/EH-SP/SP2 Series
(Note) This applies when an AC reactor is installed on the power supply unit.
If the total equivalent capacity Po exceeds the limit value given in (Table 3), proceed to "(2) Calculating the higher
harmonic current flow".
Measures are not required if the value is not exceeded.
Total equivalent circuit: Po = Σ • Ki • Pi
Ki :Conversion coefficient (Refer to following table)
Pi :Rated input capacity of each device
(Table 1) Rated capacity of each unit
Unit type Rated
MDS- input
capacity
E- EH-
pi [kVA]
SP2-20 - 1.94
SP2-40 - 5.62
SP2-80 - 13.54
SP2-
- 15.84
16080
(Table 2) Circuit class and conversion coefficient for each unit
Model
(Table 3) Limit values for total equivalent capacity
Incoming voltage Total of 6-pulse equivalent capacity
6.6kV
22/33kV
66kV or more
Unit type Rated
MDS- input
capacity
E- EH-
pi [kVA]
V1-20 V1-10
V1-40 V1-20
V1-80 V1-40
V1-160 V1-80
V1-160W V1-80W
V1-320 V1-160
V1-320W V1-160W
V1-200
Circuit
Circuit type
class
3-phase bridge (with smoothing capacitor)
3
With AC reactor (Note 1)
3-phase bridge (with smoothing capacitor)
3
With AC reactor (Note 1)
50kVA
300kVA
2,000kVA
511
Unit type
MDS-
E- EH-
1.0 V2-20 V2-10
1.6 V2-40 V2-20
2.7 V2-80 V2-40
5.9 V2-160 V2-80
9 V2-160W V2-80W
11.5 - V2-160
13.1 V3-20 -
21.7 V3-40 -
Conversion
coefficient
Ki
K32=1.8
K32=1.8
IB-1501229-F
Rated
input
capacity
pi [kVA]
2.0
3.2
5.4
11.8
18.0
23.0
3.0
4.8