Yaskawa Sigma-5 User Manual: Setup for Rotary Motors - Manual (Page 26)

2.2 Servomotor Installation
2-5
2
Installation
2.2
Servomotor Installation
2.2.1 Orientation
Servomotors can be installed either horizontally or vertically.
Servomotors with gears can be installed only horizontally, depending on gear lubrica-
tion conditions. Refer to
Σ -V Series Product Catalog (KAEP S800000 42) for details.
2.2.2 Installation Standards
The motor rated specifications (rated output, rated torque, and rated speed) are the
continuous allowable values at an ambient temperature of 40
°C when servomotors
are installed with heat sinks.
For more information on heat sinks, refer to
Σ -V Series Product Catalog (KAEP
S800000 42).
When a motor is mounted on a small surface, the motor temperature may rise consid-
erably because of the limited heat radiating abilities of the surface. To restrict the
temperature rise, you should either mount a heat sink or limit the electrical, thermal,
and mechanical stress on the motor (derating). Refer to
Σ -V Series Product Catalog
(KAEP S800000 42) for the relation between heat sink size and derating. The data in
the catalog is given only for reference, as the actual temperature rise depends on how
the heat sink (motor mounting section) is fixed on the installation surface and what
material is used for the motor mounting section. Always check the actual motor tem-
perature.
If the servomotor is covered, or if a heating element is installed near the servomotor,
the motor temperature may rise considerably. In this case, take following counter-
measures.
• Reduce the load ratio.
• Reconsider the motor heating conditions.
• Install a cooling fan to forcedly cool the motor.