
B-65222EN/03 HANDLING, DESIGN, AND ASSEMBLY 2.MECHANICAL DESIGN
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2.8.3 Cooling Plate Addition
The coil sliders of 1500A/4 and higher models have a built-in cooling
tube. An optional cooling plate is available with the coil sliders of
900D/4 and lower models. For further cooling, improved continuous
rated force, or higher-level heat shielding, the customer is to prepare
an additional cooling plate (cooling mechanism). A relatively higher
effect can be expected from the use of a cooling plate with a higher
cooling capability or from the installation of a cooling tube on the
sides of the coil slider.
NOTE
1 Be careful not to cause condensation on the coil
slider by excessive cooling.
2 The rated force cannot be improved beyond the
specified value of the driven amplifier by any highly
efficient cooling.
2.8.4 Cooling Water
Water is used for water cooling. However, tap water may contain
metallic ions. If tap water is used for a long time, scales (contaminant
layers and lumps) build up, and can degrade heat exchange efficiency
and can clog the cooling tube. So, use ion exchange water.
Copper is employed for a cooling tube used with the linear motor. So,
as an anti-corrosive agent to be added to cooling water, use an agent
that does not corrode copper. Moreover, do not use a strong alkaline
anti-corrosive agent.
Cooling oil may be used instead of cooling water. When cooling oil is
used, however, a degraded cooling efficiency results due to a
characteristic difference between water and oil, and the continuous
rated force decreases accordingly. So, when using cooling oil,
consider an output margin of ten percent to several tens percent.
NOTE
On cooling water, an anti-corrosive agent, and
cooling oil, a restriction may be imposed not only
from the motor but also from the chiller. So, consult
with a chiller supplier as well to select a cooling
medium that does not adversely affect the motor
and chiller.