Polyphase ferroresonant voltage stabilizer having input chokes with non-linear impedance characteristic

Apparatus for use with an a.c. source of variable voltage level and waveshape, and having a given frequency for providing a regulated a.c. output to a load having a variable current demand, comprising:

• input choke means coupled with said a.c. source for deriving an energy input substantially immune from said variable waveshape and voltage level, said input choke means having a varying gap core for deriving a non-linear impedance characteristic corresponding with said load variable current demand wherein substantially high impedance is exhibited in the presence of low said load demands and lower impedance is exhibited in the presence of higher said load demands;
• synthesizer network means for normally generating a predetermined output waveshape, providing that externally generated transient phenomena are not imposed thereupon, including polyphase pulse saturable reactor means coupled across said a.c. output, capacitor means coupled across said a.c. output for effecting the oscillatory saturation of said reactor means at said given frequency, and primary winding means coupled with said input choke means and magnetically associated with said reactor means for transferring said input energy thereto;
• and
• trap means including a frequency selective trap tuned to resonate at a selected value intermediate second and third harmonic energy levels and coupled with said synthesizer network means at a location affecting the said predetermined output waveshape for returning transient phenomena induced second and third harmonics to fundamental.

Apparatus for use with an a.c. source of variable voltage level and waveshape, and having a given frequency for providing a regulated a.c. output to a load having a variable current demand, comprising:

• input choke means coupled with said a.c. source for deriving an energy input substantially immune from said variable waveshape and voltage level, said input choke means having a varying gap core for deriving a non-linear impedance characteristic corresponding with said load variable current demand wherein substantially high impedance is exhibited in the presence of low said load demands and lower impedance is exhibited in the presence of higher said load demands;
• synthesizer network means for normally generating a predetermined output waveshape, providing that externally generated transient phenomena are not imposed thereupon, including polyphase pulse saturable reactor means coupled across said a.c. output, capacitor means coupled across said a.c. output for effecting the oscillatory saturation of said reactor means at said given frequency, and primary winding means coupled with said input choke means and magnetically associated with said reactor means for transferring said input energy thereto;
• first frequency selective trap means coupled with said synthesizer network means at a location affecting the said predetermined output waveshape and configured to return a certain even harmonic of said output waveshape generated by said transient phenomena to fundamental;
• and
• second frequency selective trap means coupled with said synthesizer network means at a location affecting the said predetermined output waveshape configured to return a certain odd harmonic energy of said output waveshape generated by said transient phenomena to fundamental.

Apparatus for use with an a.c. source of variable voltage level and waveshape, and having a given frequency for providing a regulated a.c. output to a load having a variable current demand, comprising:

• input choke means coupled with said a.c. source for deriving an energy input substantially immune from said variable waveshape and voltage level, said input choke means having a varying gap core for deriving a non-linear impedance characteristic corresponding with said load variable current demand wherein substantially high impedance is exhibited in the presence of low said load demands and lower impedance is exhibited in the presence of higher said load demands;
• synthesizer network means for normally generating a predetermined output waveshape, providing that externally generated transient phenomena are not imposed thereupon, including polyphase pulse saturable reactor means coupled across said a.c. output, capacitor means coupled across said a.c. output for effecting the oscillatory saturation of said reactor means at said given frequency, and primary winding means coupled with said input choke means and magnetically associated with said reactor means for transferring said input energy thereto;
• and
• means coupled with said synthesizer network at a location affecting the said predetermined waveshape for forcing energy representing at least odd and even harmonics substantially near the second and third harmonics generated by said transient phenomena to fundamental as a form of energy reflection.