Replying only to the answer and only to a part of the answer... Lenz law indeed insists the the induction is 90 degrees out of phase, however if a current is allowed to flow in the receiving coil then it's self inductance will cause the phase to be pushed as far as 180 degrees out.
If the phase were purely 180 degrees out of phase then no energy would be lost in the prinary if is didn't have resistance. This is why shorting generator coils sometimes reduces mechanical loading compared to running a load and sometimes it is even a lighter load than having the coil open circuit as this reduces core losses. However the phase will not do 180 degrees (pure reactive current) or 90 degrees (pure voltage, no current) but somewhere in between. A transformer is a little different in that unlike a generator the inductive field generally grows stronger and so if you short the secondary more current will flow through the primary to the point of destruction, however if the current into the primary is limited then it too will act in the same way and a shorted secondary could possibly pull less power from the primary that even an open secondary! On Thu, Jul 16, 2009 at 6:11 AM, Harvey Norris <[email protected]> wrote: > > 07/15/09 > Phase angle question? > This was posted this morning also on Physics and Engineering Categories, > but only one sensible response was obtained here. > Mathematics category > http://answers.yahoo.com/question/index?qid=20090715082123AAJS87o > Phase Angle Question? > I have a three phase alternator where the loads on the Delta Output should > have the effect of changing the normal 120 degree phasing inherent in the > alternators delivery. Normally three one amp currents on a delta delivery > will have 1.7 amps of current on the stator delivery lines. Here however TWO > sources of emf are present on each phase; that of the normal line > connections that dictate this 1.7/1 stator line /phase amperage ratio, and > that made by induction through the air by neighboring phases. The three > delta loads are actually three columns of coils in series resonance, where > each coil column is placed next to its neighboring phases for closest mutual > induction so that mutual induction can occur between all three columns. Thus > the second (weaker) source of emf is made by Lenz law actions of air core > induction made from the neighboring phases magnetic field action. The Lenz > law action causes currents to be induced 90 degrees out of phase with their > neighboring phases, but the stronger influence of the actual line > connections causes these currents to be delivered 120 degrees out of phase > with each other. I need to know a method whereby when the three stator line > currents are given, along with the three phase amperage currents; that the > new phase angle relationship between the three can be found from the > currents alone. I am familiar with another method of obtaining this > information by referencing each individual series resonant rise of voltage > with each other where that method also uses 6 values(phase voltage rise vs > interphasal voltage measurement), but now I want to determine the new acting > phase angles using a method where just the six different amperage values are > used to determine this information; so that it can verify the phase angle > changes noted by comparing the relative voltage rises. The three stator line > amperages are all .5A and the three phase amperages are .24 A,.24A, and .29 > A. The > voltage referencing method between phasings indicates that the sum of all > three phase angles is over 360 degrees, which would seem to be illogical, so > I want to compare the sum of the phase angles made by the amperage > comparison method. > > Answer: > I am a neighbor of harvich and can reply concerning what he is up to here. > He asked me to do this since he cannot reply to his own question. In answer > to helper, the actions of lenz law is not a 180 phased current on the > receiving coil, as would be commonly supposed, but it is 90 degrees instead > by virtue of the definition of lenz law which states that the induced > current will CONTINUALLY oppose the movement of the magnetic field that > created the induced currents. When the North pole emerges in space from the > sending coil, the receiving coil makes a North pole also to oppose that > magnetic field. But in the second quadrant of the AC cycle when the North > pole collapses through space, the receiving coil must produce an emerging > South pole instead to oppose the movement of the collapsing North pole. If > the currents of the receiving coil were 180 out of phase, they would only be > in opposition for half of the total time of the cycle, so it should be easy > to > see that for the fields to be continually in opposition in their movements > in time, the actions of the lenz law currents should instead be 90 degrees > out of phase. The coil columns are arranged in a vertical triangle as you > have imagined. The delta loads are arranged as three LC values in series > around the delta triangle, this should be sufficient to understand > schematically. > What harvich is actually doing is to make a demonstration of the conversion > of time itself into energy. He neglected to note that INSIDE this delta > triangle showing currents of .24 A, .24A,.29A; two sets of fullwave > rectifiers are placed across two of three of the internal voltage rises. The > remaining voltage rise not connected to a full wave DC rectification > conversion shows the higher amperage of .29A on its phase. The DC output is > given the load of a ferrite block of 3/8ths of an inch width. This heats up > to 240 degrees F, and also produces radio waves. Harvich has used other > alternator resonant circuits to heat the ferrite to the 800-900 degree F > range which causes a portion of the block to go into incandescence. The > input for this case is a 12 volt stator delivering .5 A on the stator lines. > The output is 48 volts DC enabling a .21 A current through the ferrite, > which is actually a non-linear resistance whose ohmic value changes in > response to the > voltage across it where here the acting resistance of the ferrite at 240 > degrees F is 48DCV/.21A= 228 ohms. At incandescence the block may only > appear to have ~ 7 ohms resistance. Here harvich is trying to show the fact > by two different measurement techniques that the input of energy to the > process is being obtained by "EXPANDED" phase angles in time. A triangle > drawn on a flat plane will have its interior angles sum to 180 degrees, but > if this same triangle is superimposed on the curved surface of a 3 > dimensional sphere, the interior angles will now sum in excess to 180 > degrees. Likewise in analogy in normal space time the phase angles on a > three phase process will sum to 360 degrees, but in the expanded space time > of 3 phase resonances placed in mutual induction, the voltage references can > show expansions of time 1/6th greater then normally possible, for a > totalling of phase angles in excess of 420 degrees. > Source(s): > harvich; Tesla Research Group; Pioneering the Applications of Interphasal > Resonances http://groups.yahoo.com/group/teslafy/ > >
