Jetter JM-105, User Manual, Page: 44 / 106

7 Description of Connections
44 Jetter AG
7.1.1 Recommendations on the power supply
circuit bVmot
If the +V
MOT
power supply is energized abruptly, the inrush current might reach a
value high enough to destroy the servo amplifier. We recommend to place the circuit
breaker for the motor power supply at the INPUT of the power supply unit (see Fig.
8), and NOT at its output, i.e. between power supply unit and servo amplifier. This
way, the current-limiting circuitry of the power supply is used to limit the inrush
current of the JetMove 105.
Fig. 8: Terminal X1 - Recommended inrush current limitation
By the energy fed back into the JetMove 105, the voltage at the output
of the power supply unit can be increased to 60 V. See
"Recommendations on preventing overvoltage at braking or lowering a
vertical load" on page 46.
Between amplifier and power supply unit, significant pulse-like currents
of short rise-times are flowing.
In each supply cable, there is an ohmic and an inductive component. If
the values are too high, the efficiency of the power supply unit buffer is
questionable.
– Blocking capacitors will be thermally overloaded.
– Peak voltages can lead to destruction of the controller board.
From this, the following requirements to the supply cable result:
• Make sure, the cross-section is sufficient.
• decrease the inductance by twisting.
Install an external charging capacitor close to the JetMove 105, if the
distance the between power supply unit and the JetMove 105 is greater
than 20 m.
The charging capacitor must stand a high AC load. Electrolytic
capacitors meet this requirement. For more information refer to Fig. 9.
In order to prevent EMI, the 0 V potential that is close to the power
supply unit for motor operation voltage should be connected to earth.
Power supply unit
In
put
Output
-
+
JetMove 105
X1
+Vmot
0V
Circuit
breaker