Unimotor AC Servo - Orintation

Finned Motors - Designed for Horizontal
and Vertical Orientation

Figures 2 and 3 show charts comparing the variation between hc (heat transfer coefficient for convection) with DT for the finned motor design against traditional types. The heat transfer coefficient shows a massive 100% to 200% improvement over conventional housings.

Figure 4 compares the rated torque of a range of motors with and without radial fining. The figure takes account of the effect of any additional conductive cooling through the front flange and radiation. The additional convection cooling gives a sizeable increase in torque for the finned motor range.

Figure 2

95mm Diameter Frame

Figure 4

142mm Diameter Frame

Figure 3

190mm Diameter Frame

Key