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The formula for RPM is, RPM = Hz x 60 x 2/# of poles the motor has. To answer this question more information needs to be stated.
The standard rotation of a generator engine is 1800 revolutions per minute. This standard speed is brought about by the number of poles that the generator portion of a generator has in its stator.
As most turbine generators are large enough to be connected to a grid, they will operate at a speed that is predetermined by the grid frequency and the generator's electrical configuration (mainly the number of 'poles' the generator has.) A generator will always run at some multiple of the grid frequency. Most steam turbines on 60 Hz systems operate at either 1800 or 3600 RPM. Hydroelectric turbines run much slower and have a large number of poles. The turbines at Parker Dam, CA, for example, run at a speed of 94.7 RPM. A generator may run at a faster or slower speed if it is disconnected from the grid, but once synchronized it runs at a constant speed. Under certain circumstances a generator may experience a 'slipped pole' (where, for instance, more input force than designed forces it to jump ahead a fraction of a turn), which creates a great deal of physical stress and is something that is considered undesirable operation.
945 rpm
If you're trying to determine the speed of your car by looking at the RPM, you can't do that without knowing the gear ratio that exists between the engine and the wheels. What you can do is to drive in different gears and see what the speed is for various engine RPMs.
Relationship between motor rpm and no of poles
The formula for RPM is ; RPM = Hz x (120 (constant)) divided by the # of poles. Number of poles a motor has; # of poles = Hz x (120 (constant)) / RPM.
The two main factors are the frequency and the number of poles of the motor. A formula for RPM is HZ x 60 x 2/ number of poles the motor has.
All motors have a set number of poles for the speed they are designed to run at. 3600 rpm are 2 pole,1800 rpm are 4 pole, 1200 rpm are 6 pole, ect.
Name plate data should indicate the number of poles / RPM. For speed N= (120 x Frequency) / Number of poles Using this formula you can find out the number of poles, provided you have other parameters available. If no data is available, run the motor on no load, and measure the rpm, know the frequency, calculate the poles.
Feed Rate = No of Cutting teeth x RPM x Feed per tooth.
N=120f/P where N - number of rotations in rpm f - frequency in Hz and P - number of poles
Speed (RPM) = 120 x f / p f = frequency p = number of poles. 2 poles, speed = 3600 RPM 4 poles, speed = 1800 RPM
voltage depend on current and resistance r.p.m depend on no of pole
It is based on the RPM of the motor. Use the following formulas for 50 and 60 Hertz. The mathematical formula is Frequency in Hertz times 60 (for seconds in a minute) times two (for the positive and negative pulses in the cycle) divided by the number of poles. For 60 hertz, the formula would be, 60 x 60 x 2 = 7,200 no load RPM divided by the number of poles will give you the nameplate RPM of the motor. eg from above formula 7200/2 pole = 3600 RPM, 7200/4 = 1800 RPM, 7200/6 = 1200 RPM
power = torque * rpm
Assuming the number of poles is the same, you need the same RPM to maintain phase. Otherwise, voltage and phase are not really the same.