Drives and Control Solutions

Motors, Control Solutions, Power Transmission and Advanced Motion Technology                                                                 

November 2, 2018

Maximizing Gearmotor Speed Range is SEW-EURODRIVE'S technical white paper that shows how to operate VFDs above 60Hz to widen gearmotor speed range, improve system stability, and reduce cost. In fact, operating VFDs as high as 120Hz may significantly enhance gearmotor performance.

Many engineers assume that the inverter and gearmotor must operate within the 60Hz threshold. Some think that going to a high speed above 60Hz may cause the motor to overheat. But in reality, stopping at 60Hz may actually cause the motor to overheat at a low speed.

With a carefully designed drive system and correct ratio, pushing the operating frequency above 60Hz is possible using one of two proven control methods - field weakening or supercharging. Both methods are discussed in detail, along with technical charts and formulas. Through a common conveying example, the paper demonstrates how to properly select a gearmotor that will significantly enhance performance in the following ways:

• Increase stability by reducing inertia mismatch

• Widen the available speed range

• Eliminate a costly ventilator fan at low speed

• Eliminate motor overheating at low speed

• Enable the use of a smaller motor

Visit www.sewwhitepapers.com/vfd to download the PDF.


Editor's Pick: Featured Article


DCS-23-Invertek-ForestCarbon-400.jpg

New woodlands are being created in the UK with the help of Mid Wales-based Invertek Drives through the Forest Carbon project to offset its carbon footprint. The company, which manufactures variable frequency drives (VFD) at its global headquarters at Welshpool, Powys, has worked with a local printing company to purchase ‘carbon balancing’ paper for all of its in-house printers, including the printing of its products’ handbooks.

Forest Carbon plants woodlands for companies wanting to mitigate the impact of their greenhouse emissions, as well as making a contribution to wider environmental benefits. It is the only UK-based carbon standard and is supported by the government.

The woodlands are planted at locations where they would not otherwise be commercially viable. The paper purchased by Invertek Drives is currently helping plant trees on land near Carlisle, Cumbria.

The new woodlands will not only help capture CO2, but also provide benefits for local biodiversity, landscape, flood management, water quality and recreation.

Referring to companies like Invertek Drives, Carbon Forest states: “These are companies who already avoid and reduce their emissions as far as they can and want to finish the job by capturing the remaining balance.”

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Allied Motor MaintenanceSmall motors – both AC and DC – serve as critical points in industrial operations. They may be integral to automation and equipment control and serve multiple purposes to mechanically drive and actuate systems and equipment, but are often replaced rather than repaired or reconditioned.

Larger motors may be repaired, rewound, and sent into a motor rewind pool.  However, many motors will simply be replaced when imminent signs of failure are detected using smart equipment, instrumentation, and tools discussed below.

 

 

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New Product

POW-R-Line CS Switchboards by EatonIntroducing Eaton’s Pow-R-Line CS switchboard, the most compact, expandable, service entrance and distribution solution in Canada. This versatile design allows for top or bottom service entrance cables, and expansion sections to the main structure to suit any design requirement. Eaton’s Pow-R-Line CS switchboard provides a space-saving design advantage with a smaller footprint than any comparable switchboard in the market.

Key features and benefits include:

Expanded offering
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