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Kollmorgen
1.10
Regen circuit
During braking with the aid of the motor, energy is fed back to the servo amplifier. This energy is
converted into heat in the regen resistor. The regen circuit (thresholds) are adjusted to the supply
voltage with the help of the setup software.
Our customer service can help you with the calculation of the regen power which is required. A des-
cription of the interface can be found on page 39 .
Internal regen resistor
External regen resistor
Functional description
1.- Individual amplifiers, not coupled through the DC-link (DC+, DC-)
2.- Several servo amplifiers coupled through the DC-link circuit (DC+, DC-)
®
SERVOSTAR
601...620 Installation Manual
:
:
:
The circuit starts to respond at a DC-link voltage of 400V, 720V or 840V (depending on the
supply voltage). If the energy which is fed back from the motor, as an average over time or
as a peak value, is higher than the preset regen power, then the servo amplifier will output
the status "regen power exceeded" and the regen circuit will be switched off. At the next
internal check of the DC-link voltage (after a few ms) an overvoltage will be detected and the
Servo amplifier will be switched off with the error message "Overvoltage F02" (ð p.60). The
BTB/RTO contact (terminal X3/2,3) will be opened at the same time (ð p.45)
Thanks to the built-in regen circuit with its patented power distribution, several amplifiers
(even with different current ratings) can be operated off a common DC-link. This is achieved
by an automatic adjustment of the regen thresholds (which vary, because of tolerances).
The regen energy is distributed equally among all the amplifiers. The combined power of
all the amplifiers is always available, as continuous or peak power. The switch-off takes
place as described under 1. (above) for the servo amplifier with the lowest switch-off
threshold (resulting from tolerances). The RTO (BTB) contact of this amplifier (terminals
X3/2,3) will be opened at the same time (ð p.45).
Regen circuit: technical data
Supply voltage
Rated data
Upper switch-on level of regen circuit
Switch-off level of regen circuit
Overvoltage F02
Continuous power of regen circuit (R
3 x 230 V
Continuous power of regen circuit (R
Pulse power, internal (R
Pulse power, external (R
External regen resistor
Upper switch-on level of regen circuit
Switch-off level of regen circuit
Overvoltage F02
Continuous power of regen circuit (R
3 x 400 V
Continuous power of regen circuit (R
Pulse power, internal (R
Pulse power, external (R
External regen resistor
Upper switch-on level of regen circuit
Switch-off level of regen circuit
Overvoltage F02
Continuous power of regen circuit (R
3 x 480 V
Continuous power of regen circuit (R
Pulse power, internal (R
Pulse power, external (R
External regen resistor
03/04
SERVOSTAR 601/603
SERVOSTAR 606-620
SERVOSTAR 601-620
)
Bint
Bext
max. 1s)
Bint
max. 1s)
Bext
)
Bint
Bext
max. 1s)
Bint
max. 1s)
Bext
)
Bint
Bext
max. 1s)
Bint
max. 1s)
Bext
66 W
33 W
33 W
SERVOSTAR
DIM
601 - 603 606 - 620
V
400 - 430
V
380 - 410
V
W
80
) max.
kW
0.25
kW
2.5
kW
W
V
720 - 750
V
680 - 710
V
W
80
) max.
kW
0.4
kW
8
kW
W
V
840 - 870
V
800 - 830
V
W
80
) max.
kW
0.5
kW
10.5
kW
W
General
450
200
0.75
5
5
33
800
200
1.2
16
16
33
900
200
1.5
21
21
33
21
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