maxon motor
1-Q-EC Amplifier DEC 50/5
Operating Instructions
4 Operating
Instructions
4.1 Power supply layout
Any available power supply can be used, as long as it meets the minimum re-
quirements set out below.
During set up and adjustment phases, we recommend separating the motor
mechanically from the machine to prevent damage from uncontrolled motion.
Power supply requirements
Output voltage
V
CC
min. 10 VDC; V
CC
max. 50 VDC
Ripple
< 5 %
Output current
depending on load,
continuous max. 5 A
acceleration, short-time max. 10 A
The required voltage can be calculated as follows:
Known values
Ö
Operating torque M
B
[mNm]
Ö
Operating speed n
B
[rpm]
Ö
Nominal motor voltage U
N
[V]
Ö
Motor no-load speed at U
N
, n
0
[rpm]
Ö
Speed/torque gradient of motor
∆
n/
∆
M [rpm/mNm]
Sought values
Ö
Supply voltage V
CC
[V]
Solution
V
M
M
n
n
n
U
V
B
B
N
CC
1
95
.
0
1
)
(
0
+
⋅
⋅
∆
∆
+
⋅
=
Choose a power supply capable of supplying this calculated voltage under load.
The formula takes into account a max. PWM cycle of 95 % and a 1 volt max.
voltage drop at DEC 50/5.
Note
Please note
chapter 5.1.5, “/Brake” function
when using the “/brake” input!
6
maxon motor control
October 2008 Edition / Doc.No. 544910-06 / subject to change
