YASKAWA CIMR-DC4A0040AAA Technical Manual page 15

◆ General Application Precautions
■ Total Load Capacity
Select a converter with a capacity (P
Selecting the Capacity
Use the following flowchart to select the converter capacity.
Figure i.1
Motor 1 output (kW)
P
=
1
Motor 1 efficiency<2>
Motor 1 output (kW)
P
=
2
Motor 1 efficiency<2>
P
P
– (Motor 1 efficiency
=
2
3
P
= 1/3 of total drive capacity (kW)
4
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
) greater than the value of P
out
START
Only one drive connected?
No (more than one, "N" )
Are all of the motors in the
operating cycle ever in a driven or
regenerative state <1>
simultaneously?
No (The driven and
regenerative states
can occur simultaneously.)
Is P the larger of P and P
3 3
No (P
4
Select a capacity of P
or higher.
4
END
Figure i.1 Selecting the Converter Capacity
×
Drive 1 efficiency<2>
+
×
Drive 1 efficiency<2> Motor 2
Total drive capacity<1>(or regenerative capacity <1>) (kW)
× ×
<2> <2>
Drive 1 efficiency Motor 1 output (kW) + ... + Motor N efficiency
Total regenerative capacity
, P , or P
1 2
Yes (only one)
Select a capacity of P
END
Yes (All of the motors are in either a driven or
in a regenerative state
Select a capacity of P
<1>
END
Yes (P is larger.)
3
?
4
Select a capacity of P
is larger.)
END
Motor 2 output (kW)
×
efficiency<2> Drive 2 efficiency<2>
<1>
(kW)
i.2 General Safety
shown in Figure i.1.
3
or higher.
1
<1> at any one time.)
or higher.
2
or higher.
3
Motor N output (kW)
+･･･+
×
Motor N efficiency<2>
× ×
<2> <2>
Drive N efficiency Motor N output (kW))
Drive N efficiency<2>
15