I needed a vacuum cleaner motor for use in experiments involving high speeds (RPMs). can typically do 10,000 RPM with plenty of torque. So I purchased one brand new ($150 CDN). an AMETEK Lamb Electric Division part number 315923. It is a 120 volt motor, 50/60Hz AC or it can be 120 volt DC (since it can do either AC or DC it is refered to as a universal motor). At maximum speed (and hense maximum voltage) the motor pulls 11.X amps (I don't recall theI could have gone with a smaller, cheaper one but I wanted the longer shaft that this one has. The really nice thing is that the shaft is threaded at the end, making it easy to attach things to it. It is variable speed if controlled by a variac or speed control. This vacumm cleaner motors sucks air in from the shaft area and down through the body of the motor. That's how it cools itself. experiments this is an issue as this airflow can distort results. This can be solved by putting the motor and device under test completely

in an airtight box. That box then becomes the thing you put on a scaleSince no flowing air can get out, this airflow will not be Vacuum cleaner motors have a lot of torque so you'll want to slowly bring it up to speed. This can be done using a variac or speed control. Working with high rotation speeds is dangerous! parts come off of your device they will fly at deadly speeds. be completely behind a protective barrier or in another room altogether (maybe with a camera and TV monitor setup) when the motor is spinning something at high speed. To expose more of the shaft I had to remove some of the fan layers on top (pictures below). This motor had three fan layers for The layer closest to the end of the shaft was a rotating. was a nonrotating one. And the last layer was a rotating one. the first and second fan layers so that I could expose more of the shaftAs of this writing I still have the third, rotating fan layer so that it can cool the motor.

I may or may not take it off later and either always run the motor for short enough periods of time so that it does not heat up or have a separate cooling fan. I needed a strong but lightweight supporting structure for my vacuum cleaner motor so I built one. The following is the first supporting structure I made. It is all metal. The problem with this was that some experiments involved high voltages or had moving magnetic fields that could induce eddy currents so I made the above one with less metal. March 2005, Volume 19, Issue 3, pp 894–904Experimental analysis of flow fields inside intake heads of a vacuum cleanerAuthorsArticleReceived: 26 August 2004Revised: 10 January 2005DOI: 10.1007/BF02916138Cite this article as: Daichin & Lee, S. J Mech Sci Technol (2005) 19: 894. AbstractThe flow structure inside the intake head greatly affects the working efficiency of a vacuum cleaner such as suction power and aero-acoustic noise In this study, the flow inside intake heads of a vacuum cleaner was investigated using qualitative flow visualization and quantitative PIV (Particle Image Velocimetry) techniques The aerodynamic power, suction efficiency and noise level of the intake heads were also measured In order to improve the performance of the vacuum cleaner

, inner structure of the flow paths of the intake head, such as trench height and shape of connection chamber were modified. No Hoa Homes For Sale Mesa AzThe flow structures of modified intake heads were compared with that of the original intake head The aero-acoustic noise caused by flow separation was reduced and the suction efficiency was also changed due to flow path modification of intake head In this paper, the variations of flow fields for different intake heads are presented and discussed together with results of aerodynamic powerBagless Vacuum Cleaners Pets, suction efficiency and noise levelKey WordsCopyright information8 Foot Venetian BlindsDyson, the UK-based home appliance manufacturer, has agreed to acquire Sakti3, a seven-year-old Michigan startup working on an experimental solid-state approach to advanced batteries.

Dyson will pay $90 million cash for the company, according to a merger document seen by Quartz, which specifies the deal will close today after being approved by both company boards on Sept. 25. Neither Dyson nor Sakti3 responded to requests for comment. General Motors and Silicon Valley venture capitalist Vinod Khosla are also investors in Sakti3; GM declined to comment, and Khosla did not respond to several requests for comment. The acquisition marks Dyson as a potentially serious player in the race to create an advanced energy storage device. And the deal comes just seven weeks after Bosch bought Seeo, another solid-state battery startup, in a significant validation of the new technology. Many experts say solid-state batteries—which eliminates liquid electrolyte, the lithium-ion substance that can cause fires, and replaces it with a solid, such as a polymer—are the leading candidate to succeed current lithium-ion batteries. Perfecting the technology could be a huge boost to the nascent electric car industry.

But the method must overcome serious challenges before it is ready for the market, in particular how to produce solid-state batteries at a competitive price. The first indication of a tie-up between Dyson and Sakti3 came last March, when James Dyson, the UK billionaire entrepreneur who founded Dyson, invested $15 million in the start-up (paywall). He said at the time that he planned to install the batteries in a host of new electrified gadgets. In August, Sakti3 CEO Ann Marie Sastry attracted attention when she introduced her technology (video) to US president Barack Obama at “White House Demo Day” (pictured above). Since starting Sakti3, Sastry has been ultra-secretive about her work, but also skilled at maintaining a flow of funding while numerous rivals went bankrupt.Show All Items For enginering or workers who working on a desk with a computer, Sometimes we're perturbed with dust or small pieces of our work. Sometimes they are strewn on the table to even get into the sidelines computer keyboard and more, and we always forget to buy mini vacuum cleaner or just simply want to downsize.