R911190000 (HVE02.2-W018N)

Although it has an internal blower, the HVE02.2-W018N’s bleeder resistor and other heat-dissipating components require at least ~300 mm above and ~40 mm to the front/sides for airflow. Without adequate clearance or supplemental cabinet ventilation or cooling units, thermal accumulation can reduce life or trigger thermal shutdown.

The HVE series dissipates regenerated energy as heat via a bleeder resistor, whereas HVR units feed it back into the mains, improving energy efficiency. For applications with frequent braking or dynamic motion, using HVR or externally handling regenerated energy can reduce energy loss and cooling burdens.

The control voltage output must power all auxiliary circuits (sensors, relays, diagnostics) in addition to the drive control electronics. If many axes are used, the sum of their control currents must stay under ~300 W; exceeding that may require a separate auxiliary supply or limiting the number of axes to ensure safe margin.

The continuous bleeder power indicates how much regenerated energy the unit can dissipate continuously (as heat) without damage. If your system experiences frequent braking or energy regeneration beyond that capacity, the cabinet will heat up quickly and you may need external heat sinks, ventilation, or even switch to a module/regulation mode that feeds back to mains (i.e. HVR).

The unit has fixed base (idle) losses plus losses proportional to output load; at full output the load-dependent losses increase. In practice, running continuously near full load increases heat dissipation substantially, which raises cooling demands; for better efficiency, operating at moderate load (e.g. 70-80%) often keeps losses and cooling manageable.