➁
Installation
23
CAUTION
Adequately cool the external resistor. Forced air cooling may be required. Maintain resistor
temperature below its rated temperature limit.
The internal resistor is a 100
Ω
, 10% non-inductive resistor. It is intended to
dissipate no more than 10 watts. (For safety margins, a 20W resistor was designed
into the circuit.) For an external resistor, we suggest:
•
Manufacturer Name:
Dale
•
Manufacturer Part Number:
NHL-55-16N-100
Ω
(5% – 20% is suitable)
This resistor has “faston” mounting tabs, and can be mounted with two screws.
You can order this resistor, with two 18 inch (457 mm) cables, as a kit from
Compumotor. The part number is:
TQ-REGEN-KIT
Or, you may use an equivalently rated 100
Ω
55W non-inductive resistor for your
external resistor.
To connect the external resistor, follow these steps:
➀
Connect the resistor’s two terminals to
V BUS+
and
REGEN RESISTOR
, located on
the motor connector.
➁
Keep wires as short as possible, and twist them together.
The circuit will automatically dissipate half the regenerated energy in the external
resistor. Total dissipation with the external resistor installed is 2KW peak,
20W continuous.
Optional – Sharing the Power Bus
In some applications with multiple drives, one or more drives may continuously
receive regenerated power from their loads. For example, in a tensioning applica-
tion, two TQ10Xs apply tension (opposite torques) to a single moving load. In this
situation, one TQ10X could receive substantial regenerated power from its motor.
In such applications, you can connect the power buses for the TQ10Xs in parallel,
through the
V BUS+
and
V BUS-
terminals, located on the motor connector, as
shown below. (See the previous drawing, Regeneration Circuit, for an internal
schematic.)
V Bus +
Regen Resistor
V Bus -
Phase A
Phase B
Phase C
Motor Ground
123
123
Sharing the Power Bus
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