# The compact servo drive and controller cooling issues robot developers easily overlook

- Source: Robotics & Automation News
- Published: 2026-10-19T20:07:20.000Z
- RoboHot: https://robohot.news/en/items/wgp5e8xx25yf48jwbbg8a3brd
- Original: https://roboticsandautomationnews.com/2026/10/19/what-robot-builders-overlook-about-cooling-compact-servo-drives-and-controllers/106070/

## Summary

Cooling for compact servo drives and controllers must be evaluated at the system level, not by looking at individual components alone. Thermal design should start with a heat budget: for example, with 45 W of heat dissipation, 35°C air temperature, and a 65°C baseplate limit, the allowable thermal resistance is about 0.67°C/W, and the heatsink should be selected accordingly. Once a fan is installed inside an enclosure, airflow resistance increases, creating a tradeoff between fin density and airflow, while natural convection depends more on fin orientation and spacing.