Maxon EPOS4 Disk 60/12 - Page 27

Setup
Connections
EPOS4 Disk 60/12 Hardware Reference
CCMC | 2022-05 | rel10685
3-27
Table 3-15 Power supply requirements
1) Use the following formula to calculate the required voltage under load.
2) Choose a power supply according to the calculated voltage. Thereby consider:
a) During braking of the load, the power supply must be capable of buffering the recovered
kinetic energy (for example, in a capacitor).
b) If you are using an electronically stabilized power supply, make sure that the overcurrent pro-
tection circuit is configured inoperative within the operating range.
c) The maximal power supply voltage +V
CC
must be equal or greater than the holding brake
supply voltage.
The formula already takes the following into account:
• Maximum PWM duty cycle of 90%
• Controller’s max. voltage drop of 1 V @ 12 A
KNOWN VALUES:
• Operating torque M [mNm]
• Operating speed n [rpm]
• Nominal motor voltage U
N
[Volt]
• Motor no-load speed at U
N
; n
O
[rpm]
• Speed/torque gradient of the motor n/M [rpm/mNm]
SOUGHT VALUE:
• Supply voltage +V
CC
[Volt]
SOLUTION:
Power supply requirements
Output voltage
+V
CC
12…60 VDC
Absolute output voltage min. 10 VDC; max. 61 VDC
Output current
Depending on load
• continuous max. 12 A
• short-time (acceleration, <5 s) max. 36 A
V
CC
U
N
n
O
-------
n
n
M
---------
M+
 
 
1
0.9
-------
  1 V +