Hollow motors available as two-phase stepper or three-phasebrushless motors

Hollow Series Motors from Empire Magnetics are available on a custom basis in large bore or hollow shaft configurations for vacuum, radiation and other harsh environments.

These pancake-style motors come in a power range of 25 to 2,500 watts and in sizes ranging from 8 to 60-in. in diameter, with maximum bore size of 20% — 25% of the motor diameter. Comprehensive design services are available.

Magnetic and other computer modeling methods allow the envelope and performance to be accurately predicted in advance of fabrication. This allows the engineer to customize the design with a high-degree of confidence.

Hollow motors are useful in beam-line applications where a clearance hole at the centerline is vital to proper machine operation. Raster scanning, hologram generating, laser scanning, filter adjustments and instrument insertions for X-ray, electron, proton, and optical light beams have been deployed. In addition, hollow motors are also useful in cable, fiber optics and other continuous process manufacturing equipment where high strength and light weight glass or graphic fibers are wound into complex coverings as the core passes through the center of the motor.

Manipulator and robot arm designers benefit because a linear actuator can pass through the motor to perform mechanical functions in a very compact space. Alternatively, small parts can transfer through the motor, which is often useful in clean room environments.

Empire Magnetics Inc.
Rohnert Park, CA
empiremagnetics.com