Housing Requirements; Mounting; Stator - Tecnotion QTR 65 Series Manual

Air gap
The correct air gap will be ensured by installing the Tecnotion torque motor
according the instructions in this manual.
Thermal conduction
Tecnotion torque motors dissipate heat through the lamination stack. Most
heat dissipates through the larger stack surface, though the lamination
stack shoulders also have an important function. Proper clamping of the
shoulders helps dissipate the heat. Cooling is needed when the motor is
operated at continuous or stall torque.
For smaller motors (17 mm and 25 mm height) shoulder clamping can be
sufficient (see Figure 5). For larger motors it is needed for the motor to lose
its heat through the lamination stack. This can be done by a cooled housing
or heat sink.
For catalogue performance the lamination stack surface needs to be in full
contact with a body or heat sink kept at a maximum of 20°C. When only the
shoulders of the lamination stack are in contact with a cooling/clamping
surface, the available continuous torque is affected. The available continu-
ous torque can be reduced by up to 75%. This reduction is affected by the
motor size, clamping force and various changes in the environment.
Figure 5: Cooling surface indicated in orange
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3.3

Housing requirements

Pay attention to the different housing/connection requirements for the var-
ious torque series. When clamping the stator all specifications apply. When
a bonding-connection is used, the angularity does not apply. Always use
the correct concentricity and centering of the rotor in the stator. Centering
of the stator is done on the lamination stack. Rotor centering can be done
on the inside of the rotor.
3.4

Mounting

There are a number of factors to consider when mounting a torque motor.
Most importantly the method of mounting of the stator can affect perfor-
mance. A tradeoff has to be made between thermal conduction, cost of
infrastructure (housing) and ease of (de)installation.
When designing a mounting/housing, these questions can help:
■
Does the application use a high continuous load (that requires good
thermal conductivity) or short peak loads (with sufficient downtime for
cooling)?
■
What clamping force or shear strength is to be expected to keep the
stator in place?
■
Is a quick (de)installation of the motor required?

3.4.1 Stator

Do not clamp the stator on the black polyurethane casting, this can
damage the coils.
Do not center the stator on the black polyurethane casting.
MOTOR CONFIGURATION
11