1. According to the classification of motor mainly has the following categories.
(l) ac (including with brake) motor, a three-phase ac motor (12 ow a 30 kw) and the single phase ac motor (o2w IW a 1).
(2) : dc motor (including with brake) with electromagnetic (several to dozens of kw) and permanent magnet dc motor (several watts to several kilowatts).
(3) (straight) flow servo motor.
(4) all kinds of motor and special motor control.
2. According to gear transmission methods of classification basically has the following categories.
(l) gear: including helical gear, worm gear and worm, cone gear (umbrella), the planetary gear. Gear transmission is a classic, single stage transmission efficiency is as high as 98% above, simple structure, high reliability, long service life (design life of 20 years), power range (up to 30 kw).
(2) the cycloidal needle wheel: the planetary transmission principle, cycloid gear and pin gear meshing, implements the more tooth meshing transmission at the same time, to avoid the possibility of a broken tooth. Its compact structure, small size, large transmission ratio, tier 1 ratio can reach 1:11 9, single stage drive the average efficiency of more than 9 o %.
(3) harmonic drive, is a mechanical wave produced by harmonic oscillator, and then through the flexible deformation of gear, transmission produce relative displacement between the tooth and to achieve. Advantages for the single stage transmission ratio can reach 1:50, meshing teeth, high bearing capacity, small volume, light quality, single stage transmission efficiency of printing a 9 o % %. But soft round thin-walled structure, work under repeated strain state, high heat treatment requirements. At present, the commonly used in medium and small power transmission, motor power below 10 kw.