Automation Equipment and Robot Controller Cooling

Industrial automation equipment — servo drives, robot controllers, motion control hubs, vision system processors, and collaborative robot (cobot) joint electronics — combines high power density with demanding mechanical and environmental requirements. A six-axis robot controller may pack 6–12 servo drive axes into a cabinet that must operate reliably for 15+ years on a production line with minimal downtime. The cooling system must deliver consistent thermal performance across the full duty cycle of the production process, including peak loads during high-acceleration move sequences.

Cooling requirements specific to automation equipment and robot controller applications:

• Shock and vibration resistance — robot controllers and automation cabinets mounted near production machinery experience continuous mechanical vibration. Fan bearings and motor windings must be specified for IEC 60068-2-6 vibration environments. Ball bearings outperform sleeve bearings significantly in vibration-prone installations.
• 24V DC operation — industrial automation uses 24V DC as the universal control power standard. Fans operating directly off the 24V control bus eliminate converter cost and failure risk, and simplify integration with the machine safety power architecture.
• IP-rated options for machine-mounted cooling — robot arms and cobot joint electronics mounted outside the control cabinet are exposed to coolants, mist, and contamination from the production process. Fan assemblies in these locations require IP54 or higher to prevent motor winding contamination.
• Duty cycle thermal management — servo drives dissipate heat proportional to RMS current, which varies with the motion profile. A fan sized for peak RMS current may over-cool during idle or low-speed segments; PWM speed control matching fan speed to thermal load reduces noise and extends bearing life without compromising peak thermal protection.
• Long MTBF for planned maintenance alignment — automation equipment is typically maintained on 6-month or annual preventive maintenance cycles. Fan MTBF at operating temperature should exceed 50,000 hours to ensure fans remain within design life between PM intervals with margin.
• Compact form factor for dense controller packaging — cobot controllers and compact automation panels use 60–80 mm fans in areas where 120 mm standard industrial fans do not fit. Herays supplies compact format fans for these applications on request.