Hiwin D1 - Page 48

Wiring D1 Servo Drive User Manual
4-6 HIWIN MIKROSYSTEM CORP.
MD20UE01-2109
I
B
= (ΣI
n
-I
nMAX
)×K＋C
MAX
I
nMAX
While using two or more servo drives, and power on at the same time:
I
B
= C1×I
n1
＋C2×I
n2
＋‧‧‧‧＋CN×I
nN
Note:
I
B
: The rated current of no-fuse breaker
I
n
: The rated current of servo drive
I
nMAX
: The largest rated current of servo drive while using servo drives of different specifications
C: The multiple of rated current (Note: The multiple is usually 1.5 to 2.5. If user is not sure about the multiple,
please use 1.5.)
C
MAX
: The multiple of the largest rated current of servo drive
K: Demand rate (Note: If user is not sure about the demand rate, please use 1.)
◼ Example
If three D1-36 servo drives are used:
We assume C and C
MAX
are 2.
Do not power on at the same time: I
B
= (3×12-12)×1+12×2 = 48 A_rms
Power on at the same time: I
B
= 2×12+2×12+2×12 = 72 A_rms
Table4.2.1 The rated current of D1 servo drive
Model
Rated Current
D1-36
12 A_rms
◼ The inrush current of main power of D1 series servo drive
When selecting breaker, the inrush current as power is supplied to the servo drive in the first 100 ms
must be considered. If several servo drives share the same breaker, please add up the inrush
currents of all the used servo drives to select a suitable breaker which can withstand the total inrush
current.
Table4.2.2 The inrush current of D1 servo drive
Model
Inrush Current
D1-36
15.5 A_rms