Baldor 23H Series, Installation & Operating Manual

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Appendix B
Control Watts Loss for Enclosure Sizing
All motor controls using power transistors to control voltage and current output to a motor generate
some heat. This heat is a normal part of switching the power devices "on" and "off". The amount of
heat generated by each must be taken into account when installing them in an enclosure. Table B.1
provides the watts loss for 230 VAC and 460 VAC model controls.
Table B.1 Series 23H Servo Control Power Losses
Constant VAC Switching Watts/Amp of
Torque Frequency Rated Output
HP Rating (Khz) Currents
1-10 230 2.5 14
1-10 230 8 17
15-50 230 2.5 12
15-50 230 8 15
1-10 460 2.5 17
1-10 460 8 26
15-200 460 2.5 15
15-200 460 8 23
5-2 APPENDIX B
MN723H-10/95 11/28/95 1:14 AM Page 102 (Black plate)