High power motors: Nanocrystalline cores reduce over voltage

Nanocrystalline cores are designed for use in high power inverter systems and turbine generator drives. See photo.

02/12/2009


Iron-based nanocrystalline is a soft, magnetic material that reduces build volume on ac and dc motors.

Iron-based nanocrystalline is a soft, magnetic material that reduces build volume on ac and dc motors. Source: MH&W

Mahwah , NJ –  MH&W International has introduced Magnetec Cool Blue nanocrystalline cores for use as common mode chokes to reduce the build volume of damaging motor bearing currents in high power inverter systems and turbine generator drives. Cool Blue cores also suppress asymmetrical EMI currents generated by the parasitic currents of motors and their cables. The result is increased service life of motor bearings, and reduced maintenance and stoppages, according to the company.
MH&W International Corp. provides magnetics solutions, including toroids and other products to the telecommunication and power supply industries. Cool Blue toroid cores are typically placed over the hot legs (L1-L2-L3) of a motor drive cable assembly. To serve as common mode chokes, one or more cores are placed over the connector cables in the DC-link as well as at the inverter output. Typical applications are on high power motors and wind power generating equipment. The cores are said to be easily adapted to retrofit maintenance operations, as well as to new installations.
Iron-based nanocrystalline is a soft, magnetic material that the company says provides performance superior to permalloys, ferrites and other materials when it comes to effectively reducing build volume on switched power converters and on ac and dc motors. Cool Blue cores provide a wide range of permeability, 25,000-90,000 at 10 KHz, and a saturation flux density of 1,200 mT.

MH&W’s Cool Blue nanocrystalline cores are available in a range of M-type sizes including both round and oblong shapes. The smallest core for high power motor applications has an outside diameter of 63 mm and inside diameter of 50 mm. The largest core has a 500 mm OD and 450 mm ID. The standard thickness of all Cool Blue cores is 30 mm. Prices start at $40 per piece for the 63 mm OD size in 100 piece quantities.

www.magnetec.mhw-intl.com

– Edited by Renee Robbins , senior editor
Control Engineering News Desk
Register here to select your choice of eNewsletters free.





No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
The true cost of lubrication: Three keys to consider when evaluating oils; Plant Engineering Lubrication Guide; 11 ways to protect bearing assets; Is lubrication part of your KPIs?
Contract maintenance: 5 ways to keep things humming while keeping an eye on costs; Pneumatic systems; Energy monitoring; The sixth 'S' is safety
Transport your data: Supply chain information critical to operational excellence; High-voltage faults; Portable cooling; Safety automation isn't automatic
Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.

Maintaining low data center PUE; Using eco mode in UPS systems; Commissioning electrical and power systems; Exploring dc power distribution alternatives
Synchronizing industrial Ethernet networks; Selecting protocol conversion gateways; Integrating HMIs with PLCs and PACs
Why manufacturers need to see energy in a different light: Current approaches to energy management yield quick savings, but leave plant managers searching for ways of improving on those early gains.

Annual Salary Survey

Participate in the 2013 Salary Survey

In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.

Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.

2012 Salary Survey Analysis

2012 Salary Survey Results

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.