maxon motor control
17
maxon motor
Operating Instructions
1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
10.2.2 Supply voltage
To protect the DEC module from damage an external fuse, a TVS-diode and
a capacitor in the power supply voltage line are recommended.
+
C1
220u/63V
FU1
7A
D1
SMBJ54A
+VSupply
+Vcc Module 1
Gnd
Gnd
Fuse FU1:
To protect against reverse polarity, place a fuse at the entry of the power
supply. Together with the TVS-diode, the fuse breaks an occurring reverse
current.
Recommendation for the fuse:
–
Littlefuse 154 Series OMNI-BLOK
®
fuse holder with SMD NANO
2 ®
Fuse
installed:
154007. 7 A very fast-acting
TVS-Diode D1:
To protect against overvoltage due to supply transients or the motor braking
energy, connect a transient voltage suppressor diode to the power supply
voltage.
Recommendations for the TVS-diode:
–
Vishay SMBJ54A
U
R
=54 V, U
BR
= 60.0...66.3 V @1mA, U
C
= 87.1 V @ 6.9 A
–
Diotec P6SMBJ54A
U
R
=54 V, U
BR
= 60.0...66.6 V @1mA, U
C
= 87.1 V @ 6.9 A
Capacitor C1:
An external capacitor is not mandatory for the function of the DEC module.
To reduce the voltage ripple and to buffer the back-fed energy a electrolyte
capacitor can be connect to the power supply voltage.
Recommendations for the electrolyte capacitor:
–
Panasonic EEUFC1J221S
Rated voltage 63V, Capacitance 220
m
F, Ripple Current 1285 mA
–
Rubycon 63ZL220M10X23
Rated voltage 63V, Capacitance 220
m
F, Ripple Current 1120 mA
–
Nichicon UPM1J221MHD
Rated voltage 63V, Capacitance 220
m
F, Ripple Current 1300 mA
10.2.3 Motor phase
The DEC Module 50/5 has no built-in chokes.
For most motors and applications no additional motor chokes are neces-
sary. In case of high power supply vV
CC
and a motor with very low
inductance the current ripple will become too high. This causes unnecessary
motor heating and unstable control behavior.
