Brushed Motor
Posted on | May 2, 2009 | Comments Off
Brushed Motor
How to calculate input power and output power of a DC motor?
For a brushed dc motor, what formula should i use?
The input power calculation is relatively easy.
Just use P=VI in watts. This is ELECTRICAL power input.
The output power measurement is a little harder. The easiest if you have a clutch, you can measure the output torque and speed it runs at, then calculate the horsepower, then convert to watts.
If you don't have the clutch and associated readouts and software....
then it may be done with a little math, a tachometer(prefer a stoboscope) a DMM and another DC motor.
What you are trying to achieve is finding the BEMF, which is Ke.
Then use that value, multiply it by 1.3524. This will tell you how much torque is put out per amp of input current.
Then you can equate speed with current since they are proportional, then you can calculate the watts. It's rather a round about way of doing it, with minimal equipment.
You can use the below websites to help crank out the numbers. Otherwise, you are left with just getting the data sheet from the motor mfg.
How to Break in a R/C car brushed motor--The Water Method.
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Skyartec Cessna Brushed Motor CE1-017 USA Stock |  |
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Virtuoso Coffee Grinder List Price: $220.00 Sale Price: $199.00 Used From: $175.00 Average Rating:   |
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585 -Black body with brushed-satin metal top and base -Italian-made 40 mm conical burrs -40 grind settings from Espresso to French Press -Innovative calibration performed during manufacture -Can be user calibrated -480 Watt DC motor -Special gear reduction with unique speed control between 405 to 495 RPMs -60 second timers switch -pulse button manually controls on/off function -Front-mounted pulse button makes it easy to grind directly into a brew basket -5 ounce grounds bin -8 ounce bean hopper -Easy to clean -Dimensions: 14''H x 5''W x 7''D -Weight: 8 lbs The Virtuoso has many of the winning features of the Maestro Plus along with commercial grade components, higher performance and sleeker style... |
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Monte Carlo 8ATR44BSD Airlift, 44-Inch 8-Blade Ceiling Fan, Up Light and Reversable remote, Brushed Steel Motor Finish and Clear Frost ABS Blades List Price: $761.20 Sale Price: $599.00 Average Rating:  |
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The Monte Carlo Fan 8ATR44BSD is an Airlift Ceiling Fan with the CT150 - Combo Wall/Hand Held Transmitter w/ Up-Down Light & Reverse Controls in the Brushed Steel motor finish. When imagination, design and engineering combines forces? a feast for the eyes... |
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A truly unique design offering an unsurpassed level of comfort. Gyro's ability to precisely control the direction and intensity of the cooling breeze, efficiently circulates air in any size or shape room.
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Litex TIT52SCH5LKRC Titan 52-Inch Five-Blade Ceiling Fan with Remote Control, Satin Chrome with Opal Glass Light List Price: $329.40 Sale Price: $219.60 |
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The Ellington Fan TIT52SCH5LKRCX is a Titan Ceiling Fan with the RC104 - LCD Remote Control in the Satin Chrome motor finish. This Ceiling Fan is from the Titan Collection and is UL Indoor rated. The Titan Includes 6" Downrod. |
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The World Famous Zippo® Guarantee Any Zippo metal product, when returned to our factory will be put in first class condition free of charge, for we have yet to charge a cent for the repair of a Zippo metal product, regardless of age or condition... |
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The World Famous Zippo® Guarantee Any Zippo metal product, when returned to our factory will be put in first class condition free of charge, for we have yet to charge a cent for the repair of a Zippo metal product, regardless of age or condition... |
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Brushed Chrome, Harley-Davidson Motor List Price: $24.95 Sale Price: $14.22 |
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ATTRIBUTES Finish/Material: Brushed Chrome Fuel: Lighter Fluid Graphic: Harley-Davidson Motor Special Features: Windproof |
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1/16 Slash 4WD RTRw/Brushed Motor, 2-CH Radio Sys List Price: $300.00 Sale Price: $177.55 Average Rating: |
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The 1/16 Slash 4WD is built on the proven innovation of the Revo® and E-Revo models, and includes exclusive rocker-actuated, long-travel inboard suspension; full ball bearings; 2mm hex hardware; oil-filled shocks; and sealed, silicone-filled differentials... |
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370 Motor & Gearbox (V2) ,6.6:1 .4 Module List Price: $23.99 Sale Price: $17.99 |
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370 Motor & Gearbox (V2)6.6:1 .4 Module |
How can I rewire an old 12 volt car generator to run as a 12 volt motor? It has 2 brushes.?
I tried hooking it to a 12 volt car battery last night and it won't start turning. This generator has windings instead of permanent magnets, does that change things.
Thanks
Rob
You just need to hook it up to a battery charger and turn it up on engine cranking and it should do. The older it is the more volts it may take but make sure it is dc volts. Then if it doesn't work try turning it a little to get it started then if doesn't work throw it away it doesn't work.
Tags: brushed > brushed motor > brushed motor break in > brushed motor controller > brushed motor maintenance > brushed motor vs brushless motor > brushed motors > control > dc > electronics > motor very
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