You can get a decent approximation by multiplying the 12V peak power by the square of the %Vin. Example with CIM at 9V: CIM peak power @ 12V = 337W. %Vin = 9V/12V = 75%
How do you calculate the power of a motor?
By taking the voltage and multiplying it by the associated current, the power can be determined. A watt (W) is a unit of power defined as one Joule per second. For a DC source the calculation is simply the voltage times the current: W = V x A.
How do you calculate the maximum power of an engine?
If maximum RPM rmax was at x=4.0 in this graph, the redline torque Tf would be y=0.5. Maximum power Pmax would then be y=2.25 at x=3.0 RPM (rpmax). Consequently, maximum torque Tmax would be at x=2.0 RPM (rtmax).
How do you calculate motor speed?
Poles and Speed
- 60 x 60 x 2 = 7,200 no-load rpm Ã· number of poles. For a 50-Hz system, the formula would be:
- 50 x 60 x 2 = 6,000 no-load rpm Ã· number of poles. Using this formula, you can see that a four-pole motor operating on the bench under no-load conditions runs at 1,800 rpm (7,200 Ã· 4 poles).
What is the formula of power in 3 phase?
P = √3 × pf × I × V
This simply states that the power is the square root of three (around 1.732) multiplied by the power factor (generally between 0.85 and 1, see Resources), the current and the voltage.
What is the formula for calculating rpm?
How to Calculate Motor RPM. To calculate RPM for an AC induction motor, you multiply the frequency in Hertz (Hz) by 60 — for the number of seconds in a minute — by two for the negative and positive pulses in a cycle. You then divide by the number of poles the motor has: (Hz x 60 x 2) / number of poles = no-load RPM.
What is the maximum power of the engine?
The power band of an internal combustion gasoline automobile engine typically starts at midrange engine speeds (around 4,000 RPM) where maximum torque is produced, and ends close to the redline after reaching maximum power between 5,000 and 6,500 RPM.
What is better to have torque or horsepower?
Torque, simply, is the ability of a vehicle to perform work — specifically, the twisting force applied by the crankshaft. Horsepower is how rapidly the vehicle can perform that work. … Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.
Why does torque drop at high rpm?
At high RPM, torque drops off primarily from intake and exhaust flow restriction. Volumetric Efficiency declines because the engine can’t breathe any faster. Mechanical efficiency also declines at higher RPM, due to increased frictional resistance. This further reduces torque at the output.
What is synchronous speed and it’s formula?
This rotating magnetic field moves with a speed called synchronous speed. The Synchronous speed can be calculated as follows: 120 times the frequency (F), divided by the number of poles (P): The synchronous speed decreases as the number of poles increases.
What is 120 in motor speed formula?
The equation for calculating synchronous speed is: S = 120 f/P speed = constant (120) times frequency of power source (60 Hz) divided by number of poles used in the motor (P). Where does the 120 come from and what units does it have? There is RPM on one side and Cycles/second divided by #of poles on the other.
How many amps is a 3 phase?
For example, a three phase circuit using 25,000 watts of power and a line voltage of 250 will have a current flow of 25,000/(250 x 1.73), which is equal to 57.80 amperes.
How many kW is an amp?
You can use this kilowatt to amperes converter. Below you will find 3 examples of a kW to Amps conversion for: 4 kW central air conditioner (220 V).
kW To Amps Calculator.Power (kW)Voltage (220 V)Amperage (A)1 kW to Amps:220 V4.55 Amps2 kW to Amps:220 V9.09 Amps4 kW to Amps:220 V18.18 Amps6 kW to Amps:220 V27.27 AmpsЕщё 5 строк
How many volts is a 3 phase line?
For three phase, you connect line 1 to line 2 and get 208 volts.