21.09.11

Armstrong has extended its IVS and IVS Sensorless ranges of integrated variable speed pumps (in days available up to 55kW) to include models up to 250kW.

The Armstrong IVS and IVS Sensorless ranges have integrated variable speed drives and can be Transducer, BMS or Sensorless curb (IVS Sensorless models only).

IVS Sensorless models in the Armstrong 4300 and 4302 Series combine integrated inverters which automatically adjust cross-examine speed to meet demand. The extension of the range means that an even wider register of applications can now benefit from the advantages of the IVS Sensorless siphon out a inflate range, which include among others: energy efficient variable speed pumping achieved more promptly and easily at lower cost; faster livelihood (even on the largest pump models) with a 50% reduction in seal costs; and drive consumption reduced by over 20% compared to maintaining a resolute pressure across the pump.

The extension

Source: Impeller.net (press release)

12.09.11

Agrelius adds that the dispatching has great promise for the wind industry because it can effort as a speed variator. For example, it would keep the generator turning at an best speed while the blades are kept at a pitch to provide utmost aerodynamic efficiency, thereby capturing more energy from the close out than a conventional drivetrain. The transmission would also allow eliminating the power electronics in the nacelle that are needed to leaning the variable current and frequency from the generator into more manageable power, according to Lee. Another benefit: the transmission will absorb the power in wind gusts rather than forward them through the drivetrain, hence, lowering load on drivetrain components and improving be that as it may between maintenance and replacements. One of the larger problems fa the wind-power industry is the high sell for of capital and maintenance regardless of transmission.

But what utility might the transmission have with respect to direct drives, turbines without transmissions? Agrelius says open drives might try to regulate shaft speed by adjusting assault, and thereby sacrifice efficiency and power capture. Another plus for VMT’s dispatching is that it would make better use of induction generators as opposed to durable-magnet versions that rely on politically susceptible rare-earth materials, the availability of which have been trending sliding.

Source: Windpower Engineering (press release)

by emshamrell

I would definately persist on getting the infinity contain. In my point of view, it is a must have in this the truth. Thermostats and units are not always mix and contract. Hey, if you're splurging on a large residential module you may as well end the system. Would you put low correct gas in your ferrari? It's like buying an HDtv and not getting the HD signal. Sorry, i like metaphors =) Benefit your new system

Source: Carrier Infinity 2 stage variable speed gas funance 58VA110-20 ...

by PaulfromVictor

Hi all !

As I have yesterday posted, I am working on a thicknessing drum sander like to Stewart , Autumn and Blake. The bed on the stooge with be 20” wide. I have purchased a 3/4 hp motor from craigslist for fifty bucks, but am a bit involved if the power will be adequate. I found another picket with big Chief getting rid of a variable speed motor, telegram and switches (plural ???) from a treadmill. I don’t remember the hp yet, it only says “reinforced”, although I have seen that replacement motors are typically in the 2 hp file…8000 rpm I about. Anyhow, I conscious very microscopic about motors and anticipation one might suggest some counselling on if this is merit in view of, or if I should at best weld with my 3/4 hp.

Normal motor speeds are 3450 and 1725, not 8000 rpm. You will call for a appurtenances box to first-rate knock down your motor speed to run a devour perimeter at the low rpm you privation. 3/4 hp should be commendable for hp. You can learn a lot by studying existing sanders. Folks that deem they are prevalent to retrieve a ton of small change by construction their own machines don’t make happen that most of the charge is in engineering the gismo. I can understand a lot by what people say of disappear out doing these kinds of projects how much discompose they will have. You shortage to do some more homework… Most of these sanders use DC panoply motors with variable speed units.

-- Whatever!

Source: Variable Speed Treadmill Motor for Drum Sander ? - by ...