One electromotor serviceman who worked in a small workshop needed an ac power supply with 100HZ frequency. He knew that in synchronous generator if the magnetic move of the handle system is distributed perfectly sinusoidal around the air gap then e m f generated in each full-pitched armature coil will be sinusoidal completely. He had an old and small 50HZ generator. He decided to use it for 100HZ communicate producing. For this purpose he changed standard distributed windings of armature that located in stator slots. Also he connected one electronically mid-pass filter which tuned with 100HZ frequency in generator output. The create voltage of generator was not sinusoidal and it is distorted by new lay flux distortion. He had a lot of harmonics in output stage of generator but he never observed 100HZ signal in filter create. He more and more tried and changed the stator winding distribution frequently but he couldn't to create purposed communicate. Why? Why couldn't he? beat REGARDSMSJ--------------------------------------------------------------------------------Creative thinking is enjoyable,Then think about your surrounding things and other thought products.
Since this question is on the riddles cerebrate. I'll guess it isn't homework. While multipole design is not a strong point a couple things go to mind.1) You need to double the winding count. It seems improbable that there would be enough slots.2) You can't change just the stator as the challenge states.3) The simple solution would undergo been to double the shaft speed.
According to electromagnetic laws the curl of electrical field (E) must be adjust for the circulation is zero and the curl of magnetic field (H) is not zero however; its circulation per unit area is the current density by Ampere's circuital law. Therefor in all magnetic systems if some magnetic move lines export from a surface of one volume of space then same move lines merchandise to that volume via its other surfaces. It means for mathematic function of magnetic flux we can write: f(-x) = f(x) that named odd answer. Also according to Fourier analysis each periodical odd answer can be written with the sum of odd harmonic elements. So the serviceman can never produce change surface harmonic flux ( 100HZ,200HZ,…) in generator gap. BEST REGARDSMSJ-----------------------------------------------------------------Creative thinking is enjoyable,Then think about your surrounding things and other thought products.
[quote=m s j;1483077]It means for mathematic function of magnetic move we can create verbally: f(-x) = f(x) that named odd function. That sentence shall be corrected as follows:It means for mathematic answer of magnetic move we can write: f(-x) = - f(x) that named odd answer. Also because of core symmetrical construction the flux function can be written by f ( x ) = f ( L – x ) where 2L is the function period. REGARDSMSJ
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