(2)whentheformulacisused,thecapacityunitiskW,the voltageunitiskV,andthecurrentunitisA,whichmustbe noted. (3)thecoefficient0.76intheformulacisthecomprehensive valueofthecalculationofmotorpowerfactorandefficiency. Thepowerfactoris0.85andtheefficiencyisnot0.9.Thetwo ...
tothepowersource,alsoneedtoreactivepower,bothofwhich areindispensable. Inthepowertriangle,theratio of the active power P to the apparent power S is called the power factor cos phi, and the formula is: Cos phi =P/S=P/[(P2+Q2) ^ (1/2)] ...
Power factor is a measure of how effectively electrical power is being used. It is the ratio of the electrical power that the motor uses (also called real power) compared to the overall amount of power supplied to the circuit (also called apparent power). The electric power input formula be...
Since power is equal to torque multiplied by speed, horsepower is a measure of a motor's torque and speed capability; e.g., a 1 HP motor will produce 36 lb-in. at 1,750 rpm. Formula: HP = Torque (lb-in.) x Speed (RPM)/63,025 or HP = Torque (lb-ft.) x Speed (...
三相异步电动机转速公式(Speed formula of three phase asynchronous motor) 三相异步电动机转速公式(Speed formula of three phase asynchronous motor) Cascade speed regulation can be divided into motor cascade speed regulation, mechanical cascade speed regulation and thyristor cascade speed control form, and th...
- Power factor is the measure of a particular motor’s requirements for magnetizing amperage. The formula “watts = amps x volts” must be altered when inductance is introduced to the load to include anew term called power factor. Thus, the new formula for single phase loads becomes “watts...
(HP) is used as a baseline measure of its capabilities in the field. HP is a combination of torque and speed (RPM), with 1 HP equal to 550 foot pounds per second, or 33,000 foot pounds per minute. A motor’s torque can be calculated using its horsepower using this formula, which ...
Induction Motor control. Information on motor starting, energy saving technology, power factor correction and support software for induction motor control.
When torque, in foot-pounds, is multiplied by the speed in revolution per minute, it may be divided by the constant 5,250 to find horsepower, using this formula: horsepower=footpoundstorquexrevolutionsperminuted5,250 In terms of a minute, one horsepower is the power required to lift 33,00...
Stator size can be calculated using the volume of a cylinder formula: volume = pi * radius^2 * height For example, a 2207 motor’s stator volume is: pi x (22/2)^2 x 7 = 2660.93 The larger the stator volume, the more torque a motor can generate. Comparing a 2306 motor with a ...