By diverting harmful VFD-induced shaft voltages safely to ground, AEGIS® PRO Series Rings protect large AC and DC motors from bearing damage. Available for motor shafts to 30-in diameter, AEGIS® PRO Series Rings are specially designed for high-current applications such as generators, turbines, and medium-voltage motors.
JVL says its new MIS23 QuickStep is a series of versatile, compact, economical integrated stepper motors. Integrated stepper motors in the MIS23 series have NEMA 23 flange dimensions of 57 mm by 57 mm and are available in three models with rated torques of: 1.1 Nm (MIS231), 1.6 Nm (MIS232), 2.5 Nm (MIS234) (1000 RPM @ 48VDC). To reduce cost and protect against electrical noise many of the control and communication functions have been integrated with the motor in a housing designed to provide IP42, IP55 or IP65 protection, and eliminating the need for running control and communication cables. Different PCB’s (modules) can be mounted within the housing to create an automation/motion control system that is easy to incorporate into new and existing applications, according to the company.
Beginning with whether or not a drive is even needed, the article moves on to help you clear hurdles involved with motor compatibility, existing starters, drive reliability, controls integration, and more.
In an effort to meet the need for optimum efficiency and energy savings across all building loads, Armstrong Fluid Technology says that its Design Envelope pumps are now also available with single-phase motors. Ideal for light commercial, residential, and industrial applications using single phase power, the company claims the new pumps allow designers, contractors, project managers, and building owners to choose the best pumping solution for their specific needs.
One of the worst things you can do is note the capacity and replace the chiller. Have the building loads and usage changed? What about motors and cooling towers? Consider these and your part-load realities to create real long-term improvements.
Baldor Electric Co. introduced a new line of energy efficient electric motors. The Large AC – GPM induction motor is available up to 1,500 hp. Large AC – GPM motors are available in stock ratings of 250 – 1,000 hp, 2300/4000 Volt, totally enclosed fan cooled (TEFC), foot mounted designs.
Baldor Electric Co. introduced a new line of electric motors – Super-E motors with Baldor Shaft Grounding Brush. Stock ratings available include 1 through 50 hp in Totally Enclosed Fan Cooled (TEFC) or Open Drip Proof (ODP) Foot Mounted designs along with .5 through 5 hp in TEFC, C-Face Foot Mounted designs. The new Super-E Motor with Baldor Shaft Grounding Brush is designed with a carbon brush mounted internally to divert shaft currents away from motor bearings, thus increasing the life of the bearings.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.