mechanical equilibrium
Take a drive motor shown in Figure 1 for an internal combustion engine to be more real corresponds to a FORD FALCON SP221 (221pulgadas cubic, or even 3 , 62 liters). The curve torque at wide open throttle the carburetor is represented by the red line identified M, yy suppose driven machine is a centrifugal pump whose curve of load torque is identified as M B .
imagine that the engine is started and the pump begins to rotate. With the rotor stopped only need to overcome the friction, but as that increases the speed of the rotor will begin to exert some resistance. However, as M is greater than M B there Δ M ; torque boost positive , which will continue to accelerate until the motor curve intersects with the tough, point from which, as M - M B be negative [Δ M (-)] the pump necessarily be obliged to turn to the number of rpm for the crossing. Note that , although the balance is achieved at that point, the maximum power 221 is much greater even if the pump motor will prevent the further packing. At 3120 rpm, but we try to accelerate (and is wide open throttle) will not exceed this power, 110 HP, although have something left to give almost 140 HP.
To achieve the 140 HP, or should:
a) use another bomb
b ) modify the flow
c) modify the conjunction as coupling with the pump.
The three alternatives must allow the pump curve change to reach the cutting point M , for example, bringing the 3900 even though the pair is smaller, the power will be 130 HP.
a) use another bomb
b ) modify the flow
c) modify the conjunction as coupling with the pump.
The three alternatives must allow the pump curve change to reach the cutting point M , for example, bringing the 3900 even though the pair is smaller, the power will be 130 HP.
We also added the actual curves of torque / speed of an electric induction motor with three pairs of poles, MEZ, 220/380, 50Hz 4HP-950 rpm, with characteristics very different from a motor internal combustion pump operating the same as above and that in itself explains the operating point as we did with the comment 221.Como note that in this case the operation is more "hard" which means that operating point away from the difference between the torque and resistance, for the same increase or decrease in speed is greater in the electric motor which is more abrupt response.
explained Understanding the dynamic balance means to draw attention to the pair, conversely to what happens with many publications to confuse the equilibrium point, or equivalently, equal action reaction with the available power that has nothing to do with balance. To make it simple and serious conceptual confusion as well as the maximum the balance with which we weigh an object with the weight of the object itself. It seems a truism, but this confusion is so common that it should review this talk several times to fully understand the basics. A lover of the "irons", known as "nut" among athletes known to increase the diameter of the tires not conducive to increasing the maximum speed of the car but on the contrary, is reduced unless the amendment is accompanied by a change in the relationship differ, even though the engine and gearbox are the same. In my possession, as a credible witness to this erroneous interpretation, a copy of "Wind characteristics "published by The University of Texas in 1994, (West Texas A & M University). 235 pages with over 270 citations where they commit this unforgivable error.
take to complete the concept of the real case of a car alternator characteristic curve as shown in the chart. Note that, from the ... ... ... low rpm torque. The curve of the motor impulse almost constant and thus from the peak torque of alternator operation becomes unstable, processed without control, unless a speed restriction on the fuel inlet of the carburetor and the engine runs a quarter or half butterfly.
Now imagine the torque corresponding to a wind turbine blades with variable pitch curve as we have seen for a wind of 6 m / sec and a NACA 6712 profile. As we have taken a tough couple asynchronous induction motor as is used in 100% of the cases of systems "grid connection" (see * coupled systems)
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Mr. Enrique O. Nielsen
recommend access to Google search by entering the search word followed by enrique nielsen. Eg energy enrique nielsen
Mr. Enrique O. Nielsen
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