Formulas for Quick Calculation Power
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INDUSTRIAL PROCESS INSTRUMENTS AND CONTROLS Tel: 1-925-706-7433 Fax: 1-925-706-2583 QUICK ESTIMATE FORMULAS • Horsepower Formulas • Torque Formulas • AC Motor Formulas • 3-Phase Electrical Formulas HORSEPOWER FORMULAS For Rotating Objects HP = Where T = Torque (lbft) N = Speed (rpm) Objects in Linear Motion HP = Where F = Force (lbs) V = Velocity (ft/min) For Pumps HP = HP = Where GPM = Gallons per Minute Head = Height of Water (ft) Efficiency of Pump = %/100 PSI = Pounds per Inch Specific Gravity of Water = 1.0 1 CuFt per Sec. = 448 GPM 1 PSI = A Head of 2.309 ft (water weight) 62.36 lbs per CuFt at 62°F For Fans and Blowers HP = HP = HP = Where CFM = Cubic Feet per Minute PSF = Pounds per Square Foot PIW = Inches of Water Gauge PSI = Pounds per Square Inch Efficiency of Fan = %/100 Home Request Quote Go Shopping Search Products Basket Contents Track Order Company Information Terms & Conditions Your Privacy Manufacturers Contact Us! Technical Library Chemical Compatibility Cleanroom Standards Light Color Codes Conversion Charts Electrical Safety Electrical Symbols FCC Rules Heater Selection Humidity Motors Gears, Drives Ohm's Law Particle Contamination Power Equations Pressure Help Quick Formulas Research Links Temperature Conv t/c Reference RTD Reference Time Standards 3-Phase Equations LonWorks Carbon Dioxide SEARCH INVENTORY Temperature Level Pressure Flow Sensors Pumps Filters Valves Formulas for quick calculation of horsepower and power http://www.iprocessmart.com/techsmart/formulas.htm 1 of 3 4/23/2014 3:58 PM
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Transcript of Formulas for Quick Calculation Power
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INDUSTRIAL PROCESS INSTRUMENTS AND CONTROLSTel: 1-925-706-7433Fax: 1-925-706-2583
QUICK ESTIMATE FORMULAS Horsepower Formulas Torque Formulas AC Motor Formulas 3-Phase Electrical Formulas
HORSEPOWER FORMULAS
For Rotating Objects
HP =
Where T = Torque (lbft)N = Speed (rpm)
Objects in LinearMotion
HP =
Where F = Force (lbs)V = Velocity (ft/min)
For Pumps HP =
HP =
Where
GPM = Gallons per MinuteHead = Height of Water (ft)Efficiency of Pump = %/100PSI = Pounds per Inch
Specific Gravity of Water = 1.01 CuFt per Sec. = 448 GPM1 PSI = A Head of 2.309 ft (water weight)62.36 lbs per CuFt at 62F
For Fans and Blowers HP =
HP =
HP =
Where
CFM = Cubic Feet per MinutePSF = Pounds per Square FootPIW = Inches of Water GaugePSI = Pounds per Square InchEfficiency of Fan = %/100
HomeRequest Quote
Go ShoppingSearch ProductsBasket ContentsTrack Order
Company InformationTerms & ConditionsYour PrivacyManufacturersContact Us!
Technical LibraryChemical CompatibilityCleanroom StandardsLight Color CodesConversion ChartsElectrical SafetyElectrical SymbolsFCC RulesHeater SelectionHumidityMotors Gears, DrivesOhm's LawParticle ContaminationPower EquationsPressure HelpQuick FormulasResearch LinksTemperature Convt/c ReferenceRTD ReferenceTime Standards3-Phase EquationsLonWorksCarbon Dioxide
SEARCH INVENTORY
Temperature Level Pressure Flow Sensors Pumps Filters Valves
Formulas for quick calculation of horsepower and power http://www.iprocessmart.com/techsmart/formulas.htm
1 of 3 4/23/2014 3:58 PM
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For Conveyors HP (verticle)
HP (horizontal)
Where
F = Force (lbs)V = Velocity (ft/min)
Coef. of Friction Ball or Roller Slide = 0.02 Dovetail Slide = 0.20 Hydrostatic Ways = 0.01 Rectangle Ways with Gib = 0.01 to 0.25
TORQUE FORMULAS
T = HP x 5252
N
WhereT = Torque (LbFt)HP = HorsepowerN = Speed (rpm)
T = F x R
WhereT = Torque (LbFt)F = Force (Lbs)R = Radius (Ft)
Ta (accelerating) WK2 x Change in RPM
308 x t (Sec)
Where
Ta = Torque (LbFt)WK2 = Inertia at Motor Shaft (LbFt)2t = Time to Accelerate (Sec)
Note:To change LbFt2 to InLbSec2, Divide by 2.68To change InLbSec2 to LbFt2, Mult. by 2.68
AC MOTOR FORMULAS
Sync Speed = Freq x 120
Number of Poles
Where Sync Speed = Synchronous Speed (Rpm)Freq = Frequency (Hz)
% Slip = (Sync Speed - FL Speed) x 100
Formulas for quick calculation of horsepower and power http://www.iprocessmart.com/techsmart/formulas.htm
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Sync Speed
Where FL Speed = Full Load Speed (Rpm)Sync Speed = Synchronous Speed (Rpm)
Reflected WK2= WK2 of Load
(Reduction Ratio)2
Formulas for quick calculation of horsepower and power http://www.iprocessmart.com/techsmart/formulas.htm
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