### Determining Electric Motor Load and Efficiency

Figure 3 Relationships Between Power Current Power Factor and Motor Load Example Input Power Calculation An existing motor is identified as a 40 hp 1800 rpm unit with an open drip proof enclosure The motor is 12 years old and has not been rewound The electrician makes the following measurements Measured Values V ab = 467V I a = 36 amps

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Jun 19 2015 The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution The following shows how the size or select the matching mill required to draw this power is calculated from known tables the old fashion way .

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For a single phase AC circuit the formula to convert kilowatts kW to amps is amps = kW 1 000 ÷ volts It is possible to find the amperage from kilowatts if you know the voltage of the circuit using Watt s law Watt s Law states that current = power ÷ voltage In Watt s Law power is measured in watts and voltage is measured in

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Power of servo motor kw 1 Min cross feed mm 0.001 Cross feed drive mode Ball screw drive Cross feed moving control mode MPG handwheel or button C axis grinding spindle Power of the grinding spindle motor kw 11 Rotation speed of the grinding spindle min 1000 2400 Grinding wheel standard mm 400 50 127 Floor space

Get Price### Formulae for Calculating Amperes Horsepower Kilowatts

Wholesale electrical supplies An electrical distributor supplying everything from light bulbs and dimmers to PLCs and Industrial Automation equipment Hundreds of electrical products and tools to select from Use the chart in this calculation guide to find the formula you need according to the measure you will calculate.

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F r Radial force lb N R Resultant force lb N Horse Power Calculation P s Horsepower at the cutting tool hp KW P m Horsepower at the motor hp KW F f Torque ft lbs N m These calculations are based upon theoretical values and are only intended for planning purposes Actual results will vary.

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Induction motors are made from fractional horsepower ratings like 1/3 hp to thousands of horsepower For a decent 2 x 72 belt grinder we re looking for ideally 1 to 3 horsepower with a preference for 1.5 to 3 horsepower The motor needs to have enough power to perform efficient knife grinding and general metal shaping tasks.

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Nov 21 2019 Drivetrain Calculations For drive you want your motor to have enough torque to spin the wheels This is determined by the weight of the bot how much of that is on a driven wheel the wheel diameter and the coefficient of friction between the floor and wheel The wheel rpm is motor rpm/gear ratio and wheel torque is motor torque gear ratio.

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Grinding Wheel Speed Calculator All Norton grinding wheels are marked with a maximum operating speed in RPM Most machines and especially CNC machines use Surface Feet Per Minute SFPM as an input which requires operators to do the conversion.

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Jul 20 2011 First we must convert from hp to kW using this formula 1 Hp = 0.746 kW After that use the formula kW to ampere For 3 phase power supply kW = I x V x 1.732 x pf For 1 phase power supply kW = I x V x pf Example 1 unit induction motor power rated 25 hp 200 VAC 3 phase 90 power factor calculated the full load ampere Calculation .

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z c Number of inserts in the cut a e /d 1 Ratio of radial width of cut to cutting diameter Calculated Required Power F t Tangential cutting force lb N T Torque at the cutter Nm in lb ft lb Nmm Machining Power P s at the cutter HPc KW P m at the motor hp KW These calculations are based upon theoretical values and are only intended

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Mar 01 2008 The percentage spindle power load for the 30 hp 22.5 kW grinding motor was typically 40–45 13.4 hp or 10 kW for the plated CBN wheel and 60–70 20 hp or 15 kW with the vitrified CBN wheel These values include the idle running power without grinding.

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Motor Load Calculator What does it cost each year to operate an electric motor With the motor load calculator you can quickly estimate annual energy use and cost for any electric motor The calculator is a versatile energy management tool which accepts measured current full load amps or

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AC single phase amps to kilowatts calculation The power P in kilowatts kW is equal to the power factor PF times the phase current I in amps A times the RMS voltage V in volts V divided by 1000 P kW = PF I A V V 1000 AC three phase amps to kilowatts calculation

Get Price### Simple motor rated current calculator with calculation steps

How to use the motor rated current calculator The above tool requires following data for calculation Motor TypeSingle phase or three phase Mandatory Motor rated power in HP or kW Mandatory Input supply voltage Mandatory Motor Efficiency as per nameplate if known .

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Motor selection is often a complicated process that takes a lot of work with various vendors and time to sort and evaluate quotes Groschopp engineers share knowledge and expertise about the motor selection process Focusing on four broad motor types care is taken to meticulously evaluate the characteristics advantages and drawbacks of each.

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Dec 10 2003 For a 45 kW motor the output is 45 kW.If the efficiency is app 82 the input is 50 kW 5 kW is the loss For identifying the actual value of the following losses testing and calculation is requred Windage friction losses No load magnetic copper loss Laod copper loss stator rotor

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Grinding wheel speeds should be maintalned with in a range of 5000 to 6500 feet per minute 1525 to 1980 meters per mm unless special conditions prevall or equipment and wheels designed for substantially higher wheel speeds are used.

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The motor full load current calculator calculates the motor full load current from the following parameters Voltage V The phase to phase voltage for a 3 phase supply or the phase to neutral voltage for a single phase supply Phase Whether its a 3 phase or single phase voltage supply Rating P The power rating of the motor in kW.

Get Price### SINGLE PHASE AND 3 PHASE LOAD CALCULATION Mike Holt s Forum

Feb 05 2005 Re SINGLE PHASE AND 3 PHASE LOAD CALCULATION You were close except you don t divide single phase loads by 3 to get a three phase equivalent You just add the single phase kw to the 3 phase kw and work with that total In your case 54 kw 544 kw = 598 kw Sizing the generator is a slightly different story.

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be motor input power less various estimates for motor drive train and bearing losses to arrive at a an estimate of the power that may be going directly into the grinding process Finally it should be noted that the phenomenon of slurry pooling is not explicitly covered in the version of the model on this website.

Get Price### IEC Motor Data Calculator Electrical Knowhow

1 Select the motor horse power rating from the drop down box the available ratings ranges from 1/6 HP to 7.5 HP 1 Select the motor voltage rating from the drop down box the available values are 200 208 V 230 240 V 460 480 V 575 600 V 2 Select the motor horse power rating from the drop down box the available ratings ranges from 0

Get Price### Determining Electric Motor Load and Efficiency

Figure 3 Relationships Between Power Current Power Factor and Motor Load Example Input Power Calculation An existing motor is identified as a 40 hp 1800 rpm unit with an open drip proof enclosure The motor is 12 years old and has not been rewound The electrician makes the following measurements Measured Values V ab = 467V I a = 36 amps

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Conveyed volume calculation for a gear pump The oil volume enclosed in the gap between teeth is conveyed from the intake to the discharge side of the pump by the turning of the gear displaced to the contact point of the wheel and forced into the pressure connection per rotation cm³ D =.

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kW to Cable Size Chart Look at the table of motor kW to cable size chart The chart is prepared based on the direct online start and star delta starting Note that using aluminium cable for low rating motor up to 1.5kW/2HP motor is not recommended Here 2R indicates Two Run cables The cable size chart is suitable for both single phase and

Get Price### How to Calculate Load Torque Motor Power

Mar 04 2006 The tractive pull multiplied by the drive pulley radius will give you the load torque There is no short cut for deciding the load torque This cannot be calculated from motor side 5 Having decided the load torque you can decide the required power at motor shaft available motor size gear ratio and

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Enter the power in Nm and speed by press calculate button you get Power in kilowatt HP Torque Nm to kW calculation Motor power P kW in kilowatt is equal to motor torque T Nm times of 0.105 times of the speed divided by 1000 The torque to kW conversion formula can be written as

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May 06 2019 kw to amps calculator three phase kw to amps 3 phase motor electrical formula in hindi #kwtoamps #ampere #electrical #formula I am Aayush Sharma w

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The ratio λ = a/Lp = a/√R.∆t is used to calculate the moment arm a λ =0.5 for hot rolling and 0.45 for cold rolling The torque is equal to the product of total rolling load and the effective moment arm Since there are two work rolls Torque Mt = 2P.a Consider two high roll mill as shown in the figure.

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Calculate 3 Phase Apparent Power kVA RLA Running Load Amps current drawn during normal operation of electric motor FLA Full Load Amps amount of current drawn when full load torque and horsepower is reached for the motor FLA is usually determined in laboratory tests Note in the calculator above FLA is RLA 25 1 hp = 0.745 kW.

Get Price### Calculating What it Costs to Run a MotorJP Motors Drives

Mar 30 2017 2 Measure the current in each of the phase wires going to the motor and average them We measure 41 42 and 43 amps giving you an average of 42 amps 3 Calculate the kVa kVa = 0.00173 x volts x amps In our example kVa = 0.00173 x 230 x 42 kVa = 16.7 4 Calculate the Kw Kw = kVa x PF Power Factor x 0.01.

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How to convert from kW to Amperes in just 3 steps Multiply the kW by 1000 For example if you have a refrigerator that consumes 1.2kW you must multiply 1 2 1000 obtaining 1200 1 2 1000 = 1200 Multiply the corresponding voltage according to the formula by the power factor and by the root of three For example if I have a 220V

Get Price### Motor Sizing CalculationsAlaa Khamis

Calculate the value for load torque load inertia speed etc at the motor drive shaft of the mechanism Refer to page 3 for calculating the speed load torque and load inertia for various mechanisms Select a motor type from AC Motors Brushless DC Motors or Stepping Motors based on

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Jan 20 2005 Motor sizing made simple The proper sizing of three phase induction motors saves energy and reduces downtime A motor driving a load is an energy balancing act On one side is

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kw to amps calculator three phase kw to amps 3 phase motor electrical formula in hindi #kwtoamps #ampere #electrical #formula I am Aayush Sharma w

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General information about the selection and calculation of rolling bearings is provided in the SKF Rolling Bearings Catalogue This publication deals with questions arising from the use of rolling bearings in electric motors and generators Data from the SKF Rolling Bearings Catalogue is only repeated here

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= 0.027 kW Shaft Pump Power The shaft powerthe power required transferred from the motor to the shaft of the pumpdepends on the efficiency of the pump and can be calculated as P s kW = P h kW η 3 where P s kW = shaft power kW η = pump efficiency Online Pump CalculatorSI units

Get Price### How much power is consumed by 10kw motor Quora

Firstly 10 KW is not a standard KW rating of a motor U can get a 10 HP or 7.5 KW motor Standard ratings of a Three phase induction Motor are provided in IS 325 U can google it Generally Motor nameplate rating indicates the maximum power a mot

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A motor or a generator is a fairly efficient means of converting electrical power to mechanical and mechanical to electrical The mechanical output of a motor is the product of rotational speed and the torque In metric units Watt the rotational

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For all other motor and non motor loads multiply the current by the voltage for watts Calculate total watts used by the largest motor and all remaining motor and non motor loads and multiply by 1000 for kilowatts Add 25 percent for reserve/surge capacity and size the generator accordingly.

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How to calculate capacitor for motor is basically a question of motor design.There is no straightforward regular relationship between capacitance and the motor size in kW When we replacing these capacitors the value of capacitance and voltage should be taken from the manufacturer s specification plate on the motor or from the old capacitor.

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