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TQ10X User Guide
Optional – Connect an External Regeneration Resistor
The TQ10X Drive can dissipate regenerated energy in its internal regeneration
resistor. If your system regenerates more energy than the internal resistor can
dissipate, you can connect an external resistor between two terminals called
V Bus+ and Regen Resistor, located on the motor connector. The external resistor
doubles the TQ10X’s dissipation capabilities.
WARNING
Potentially hazardous voltages are present on V Bus+ and
Regen Resistor
terminals when
power is applied to the drive.
The next drawing shows the internal regeneration resistor, terminals for an external
regeneration resistor, and the DC power bus.
TQ10X
Internal Connections
Motor
Connector
1
AC Input
Connector
Rectifier
170VDC
+
–
+
–
Regen
Control
Logic
2
External
Regeneration
Resistor
(100
Ω
minimum)
3
V Bus –
Line
Neutral
Earth
1600
µ
F
Internal
Regen
Resistor
100
Ω,
20W
V Bus +
170VDC to
Internal
Power Amp
–
+
Regen Resistor
Regeneration Circuit
The TQ10X’s regeneration circuit works automatically—there are no adjustments
to make. The circuit monitors the voltage on the power bus. If regenerated energy
from the motor causes the bus voltage to rise above a threshold value, the circuit
closes a switch, thus connecting the regeneration resistor between the positive and
negative sides of the power bus,
V Bus+
and
V Bus–
. The energy is then dissipated
in the resistor—its power capacity is 1KW for one second, or 10 watts on a con-
tinuous basis. During the regeneration event, the bicolor LED labeled
REGEN/
OVERVOLTAGE
will be illuminated green.
The TQ10X also has an overvoltage circuit; it protects the drive from excessive
regeneration. If the motor regenerates more energy than the internal resistor can
dissipate, voltage on the power bus will rise and trigger an overvoltage fault. The
drive will shut down power output to the motor. The bicolor LED labeled
REGEN/
OVERVOLTAGE
will be illuminated red. This is a latched fault—cycle power to
resume operations.
If excessive regeneration causes overvoltage faults in your system, you can install
an external regeneration resistor. Ensure that the external resistor is adequately
mounted and cooled. Excessive heating can cause the resistor to fail.
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