초록 ▼

A drive roller for a conveyor is rotated by a brushless D.C. motor without any intervening gear reducer. The drove roller has a laminated metal stator with at least three windings external to the stator core. The stator is fixed to a rigid axially extending shaft which supports a roller tube and a p

A drive roller for a conveyor is rotated by a brushless D.C. motor without any intervening gear reducer. The drove roller has a laminated metal stator with at least three windings external to the stator core. The stator is fixed to a rigid axially extending shaft which supports a roller tube and a permanent magnet rotor on bearings. The rotor is fixed to the roller tube and closely spaced from the stator. A variable frequency power supply controls the induced magnetic field in the stator to control the rotational speed of the drive roller.

대표청구항 ▼

[ I claim:] [1.] A drive roller and roller controller for a roller conveyor comprising:a shaft rigidly mounted to a conveyor support;a stator having a core and twelve windings on the core, the stator being mounted about the shaft;a roller tube surrounding the shaft and the stator, the roller tube ha

[ I claim:] [1.] A drive roller and roller controller for a roller conveyor comprising:a shaft rigidly mounted to a conveyor support;a stator having a core and twelve windings on the core, the stator being mounted about the shaft;a roller tube surrounding the shaft and the stator, the roller tube having an interior, a first end and a second end, and an exterior surface having a diameter of 1.9 inches;a first tube closure mounted to the roller tube first end, and a second tube closure mounted to the roller tube second end, the tube closures being rotatably mounted on the shaft to rotatably mount the roller tube on the shaft;a permanent magnet rotor having sixteen poles which alternate North and South, the rotor being fixedly mounted to the roller tube interior and overlying and coaxial with the stator, the rotor and the stator forming a brushless three phase motor, with the rotor and the fixedly mounted roller tube being driven by changes in induced magnetic fields in the stator; anda variable frequency controller in power supplying connection to the windings of the stator for controlling the rotation speed of the rotor.