modulate power input with an industrial trade secret waveform.
?
What is known about triac triggering:
For a Triac regulator powered from the 50 or 60 Hertz line there are only two firing modes possible, since the Triac is somewhat similar to an inverse parallel SCR i.e. once triggered it normally remains on for the remainder of the cycle.
The two industrial standard modes that I know of are:
Zero Voltage Switched: The device is triggered on at the very beginning of the AC cycle and the number of on to off cycles are controlled to modulate power. This reduces EMI but does not have the resolution of control that phase angle firing has unless long duty cycles are used. Long duty cycles would be unsuitable for the E-CAT as it would produce visible modulations in heat output.
Phase Angle Fired: The phase angle or firing point from zero to 180 degrees is controlled for each half cycle, then the triac remains on for the remainder of the cycle. This is the type used in the lowly wall mounted lamp dimmer. It has greater resolution but produces large amounts of EMI. This mode is more likely to have been used with the E-CAT.
There is a possibility to use a blend of the two modes for greater control resolution and low EMI.
Under certain conditions it is possible to commutate a triac to the off state after it has been turned on leading to more complex modes.
There are further complex modes using FET's or IGBT's such as inverse phase angle or peak spread or it's inverse.
Most of the complex modes are well known to designers of industrial power control circuitry, there are very few secrets here using Triacs.
If there is some secret heater driving mode to the E-CAT in addition to fuel type, the project becomes exceedingly more difficult sans harmonic signatures.
Regardless of the control mode, they all produce harmonic signatures.
Input and output power was measured using devices that also recorded harmonics, so the info should be available from the signatures, in which case it is no longer secret, and we can reverse engineer the control mode from the harmonic signatures.
From the clumsy and in my opinion very poor lab test setups, I have doubts that Rossi himself is capable of designing such complex control circuitry.
"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy
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Topic: Independent lab results testing E-cat device - very impressive! (Read 36680 times)
