Nidec Digitax HD M751 Base - Page 96

Safety information Product information Mechanical installation Electrical installation Multi axis system design Technical data
96 Digitax HD M75X Series Installation and Technical Guide
Issue Number: 5
Figure 5-13 Layout output current, speed and power profile
With reference to section 2.4 Ratings on page 10, the drives listed in Table 5-7 meet the individual power and current profiles for each axis.
The total peak power demanded from the multi axis system is 9.6 kW, with reference to Table 5-1 Multi axis AC input ratings on page 86, this is within
the maximum continuous AC input power of the M753-03400160 selected for axis 4.
The total DC bus capacitance for all drives selected is 980 F, see Table 5-7 application example. The maximum frame block capacitance for an
M753-03400160 with no line reactor is 2210 F, see Table 5-1 Multi axis AC input ratings on page 86.
The M753-03400160 can therefore be used as the AC source with all drives connected as one frame block via a parallel DC bus.
As the AC input current remains within 40 A and no supplemental DC fuses are required, three 40 A LPJ fuses in the AC branch would be sufficient.
Table 5-7 Application example
Axis name
Motor current Output power Internal capacitance
AkW
F
Axis A - M753-01400042 0 to 12.6 0 to 6.69 110
Axis B - M753-01400042 0 to 12.6 -6.69 to 0 110
Axis C - M753-02400105 5 to 25 -0.8 to 8.7 290
Axis D - M753-03400160 0 to 40 0.0 to 4.28 470
Total capacitance = 980 F
3
4
5
1
2
Optional
EMC filter
Axis D
Axis C
Axis B
Axis A
0
5
10
15
20
25
30
35
40
45
0 0.5 1 1.5 2 2.5 3
Current (A)
Time (s)
Current vs Time
Axis A
Axis B
Axis C
Axis D
-60
-40
-20
0
20
40
60
0 0.5 1 1.5 2 2.5 3
Speed (Hz)
Time (s)
Speed vs Time
Axis A
Axis B
Axis C
Axis D
-8
-6
-4
-2
0
2
4
6
8
10
12
0 0.5 1 1.5 2 2.5 3
Power (kW)
Time (s)
Power vs Time
Axis A
Axis B
Axis C
Axis D
Total Power