Industrial Yaskawa New AC Servo Motor 3.0A 2.84N.m SGMG-03ASBC Made in Japan

Recommendation: Considerable heat will be generated when overhauling. This heat must be removed from the machine room in order to keep the controller cabinet temperature below 104F degrees. MOST GEARLESS APPLICATIONS – DC is still the best choice. Unless the DC motor is damaged or defective, replacing it with an AC motor will not result in improved performance. Furthermore, see comments regarding delay on start under performance on page fourteen. In gearless applications, since motors operate at low RPM, brush life and commutator maintenance are not significant issues. There are two major concerns with AC gearless applications that will drive your decision making process.

HEAT The primary concern is generation of very high heat output when overhauling which must be dissipated. For example, a 40 HP, 2:1 gearless AC with 50% counterweighting would produce 22KW of regenerated power in the form of heat.

COST The alternative is to use a regenerative AC drive, which avoids the heat problem, but will cost one-and-one-half to two-and-one-half times as much as a non- regenerative drive (standard flux vector drive).