Posted to News on 25th Apr 2007, 18:56
Stainless steel motors now available in IEC frame sizes
In a move likely to prove popular with equipment manufacturers serving European and allied markets, Baldor is adding IEC-frame models to its range of all-stainless-steel washdown-duty AC motors. Offering exceptional energy efficiency and special construction features to deliver extended life and reliability, the new SSE motors are suitable for applications involving exposure to caustic chemicals.
Designed for maximum corrosion resistance, Baldor's stainless steel motors are excellent for use in food and dairy product processing, as well as pharmaceutical and brewing industries - which frequently utilise caustic solutions and high-pressure jets for cleaning. The motors are equally applicable in chemical processing and manufacturing plants, plus outdoor applications - especially in hostile environments involving corrosive agents such as salt spray.
Baldor's stainless steel SSE motors operate from standard 50Hz, three-phase supplies and are available initially in IEC D80, 90, 100 and 112 frame sizes, spanning a power range from 0.37-4kW - with higher power versions to follow. Motors with ratings up to 0.75kW employ TENV (totally enclosed, non-ventilated) housings, while higher output models use TEFC (totally enclosed, fan-cooled) enclosures. Users can choose from different mounting options to suit their application.
High operating efficiency
Premium electrical materials are used throughout the SSE motor range to ensure very high operating efficiencies. As a result, all motors exceed EFF1 levels with efficiencies as high as 89.9 per cent for the higher power ratings - providing users with significant energy savings in applications involving extended or continuous motor operation.
SSE motors additionally employ specialised design and construction techniques to maximise performance and reliability in hostile environments. A key feature of the external construction is a welded and lip-sealed conduit box. In combination with an innovative hydrophobic aspiration system, this ensures that moisture cannot build up and short-circuit the electrical connections (it also eliminates the need for a drain plug and the mounting issues that this imposes).
All external surfaces - including the casing, mounting feet and flanges, cable conduit box and drive shaft - are constructed from stainless steel, making them highly corrosion-resistant. And labyrinth seals are used at either end of the drive shaft to prevent the ingress of moisture and help protect the motor bearings by rotating and expelling contaminants.
Encapsulated windings
Equal attention has been paid to internal construction. A prime feature is encapsulation of the windings using Baldor's advanced new E3 process (effusion epoxy encapsulation). This provides additional protection against moisture, whether from ingress or condensation. In addition, the stator windings employ special inverter-spike-resistant (ISR) magnet wire to maximise reliability and thermal performance, which is especially advantageous when the motors are used with variable frequency inverter drives.
The motors can also be supplied with stainless steel gearboxes, and in custom versions to suit specific applications. Furthermore, Baldor also manufactures servomotors and gearmotors, plus DC motors and gearmotors, in all stainless steel frames.
A PDF brochure for the new SSE motors can be downloaded from the Baldor website.
