Items Tagged with 'VFD'

ARTICLES

Electro Static Technology: Bearing Protection Ring Mounting Kit

No Comments
The split universal mounting kit version, Split uKIT, of the AEGIS® SGR bearing protection ring protects the bearings of variable-frequency drive motors from electrical damage, and allows quick and easy retrofitting of the ring on virtually any ac motor shaft without decoupling attached equipment.


Read More

NovaTorque Inc.: Brushless Permanent Magnet Motors

No Comments
Driven by variable-frequency drives, the Gen2.0 PremiumPlus+™ brushless permanent magnet motors have motor-only rated point efficiencies of 93 percent and 92 percent for 3- and 5-hp versions respectively. They are packaged in standard NEMA frame sizes and mounting dimensions for easy substitution.


Read More

AHRI Publishes VFD Standard

No Comments
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) recently published an industry-first standard for variable frequency drives (VFDs).


Read More

Feb. 3, 2012: AHRI Publishes Industry Standard for Variable Frequency Drives

No Comments
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) has announced the publication of an industry-first standard for variable frequency drives (VFDs). As with all AHRI Standards, 1210 (I-P)-2011 & 1211 (SI)-2011, Performance Rating of Variable Frequency Drives, are available free of charge on AHRI’s website at www.ahrinet.org.


Read More

More Fans or Fewer: Optimizing VFD Control

By Brian Dolin
No Comments
This article compares three schemes of fan control used on large air conditioning and refrigeration condensers. The first scheme is step control; the second is a hybrid with a VFD on only one bank of fans, while the rest remain step controlled. The final, and most efficient, scheme is VFD control of all fans, at all times.


Read More

Sept. 20, 2011: GE Energy Completes Deal to Acquire Converteam

No Comments
GE has announced the successful completion of GE Energy’s $3.2 billion acquisition of Converteam, a leading provider of power conversion and automation systems and high-efficiency power electronics, motors, and generators.


Read More

Shaft Grounding Rings Improve Sustainability of HVAC Motors

No Comments
Shaft currents induced by VFDs can wreak havoc with bearings, so a reliable method of shaft grounding is essential.


Read More

Facility Energy Audit Leads to Huge Savings

No Comments
Last year, the Evansville ARC (EARC), a nonprofit adult disability rehab and child daycare facility located in Indiana, was feeling the recession’s effects in decreased revenues from fundraising.


Read More

College Gives Compressors A-plus for Energy Savings

No Comments
As part of a renovation plan, Florida State College at Jacksonville researched a number of upgrade scenarios for its chiller plant. Initial recommendations for a conventional chiller failed to meet budget and energy-savings requirements. During the re-evaluation process, the college team visited Flagler College to see a chiller actually using the compressors.
Read More

Troubleshooting Power Problems on HVAC Equipment

By Wade Thompson
No Comments
A variable frequency drive (VFD) fails to vary the discharge-air fan speed. A motor overheats and fails prematurely. While each troubleshooting problem in an HVAC system presents its own unique set of circumstances, HVAC professionals may recognize such problems as possible power quality issues.
Read More

Multimedia

Videos

Image Galleries

2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

Podcasts

NEWSMakers: Mark Satterfield

Mark Satterfield, founder and CEO of Gentle Rain Marketing Inc. and author of “The One Week Marketing Plan” talks about his book and the importance of HVAC blogging. Posted on Sept. 19.

More Podcasts

ACHRNEWS

NEWS 09-22-14 cover

2014 September 22

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Venting R-22

The NEWS reported that a man received prison time for venting R-22. Should EPA step up enforcement?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con