User's Manual

Digital Servo Drivers
2.3 Configurations
MOH-A MOH-B MOH-C MOH-D U.M.
CAN - -
√ √
-
ETHERNET
MAXIMUM CURRENT 10 20 10 20 A
NOMINAL CURRENT 5 10 5 10 A
VDC 20-55 20-55 20-55 20-55 V
2.4 Specifications
2.4.1 Output power
MOH-A,C MOH-B,D U.M.
Peak current * 10 20 A
Constant current 5 10 A
Peak power * 480 960 W
* these limits are due to Molex Microfit connectors
2.4.2 Input power
MOH-A,C MOH-B,D U.M.
Input voltage 20-55 20-55 V
Peak current 10 20 A
Constant current 5 10 A
2.4.3 Digital Control
MOH-A,B,C,D
Control loops Current, speed, position. 100% digital control loops
Sampling frequency Speed and current loops at 20 kHz (50us), position loop 1kHz (1ms),
stepper/brush DC 40kHz
Commutation FOC (field-oriented control) sinusoidal, step/microstepping
Modulation Center-weighted PWM with space-vector modulation, full bridge
Minimum load
inductance
200 uH line-line
8 Sirius Electronic Systems s.r.l.