In-line buck/boost voltage-regulation systems and apparatus

An in-line voltage-regulation transformer comprising:

• a main winding having an input terminal for connection in circuit with an AC source of electrical power and having an output terminal for connection in circuit with an electrical load for positioning said main winding in circuit in-line between said AC source and said electrical load;
• at least first, second and third ferromagnetic transformer cores;
• said first, second and third cores having first, second and third cross-sectional areas;
• said first, second and third cross-sectional areas being progressively relatively larger in size;
• said main winding being electromagnetically coupled to all of said first, second and third cores;
• first, second and third regulator windings being electromagnetically individually coupled essentially solely to said first, second and third cores, respectively;
• said first, second and third regulator windings having first, second and third numbers of turns, respectively;
• said first, second and third numbers of turns of regulator windings being progressively smaller;
• and
• said first, second and third numbers of turns being substantially inversely proportional to relative sizes of said first, second and third cross-sectional areas.

A transformer for alternating current comprising at least first, second and third ferromagnetic transformer cores;

• said transformer cores having substantially the same heights and widths;
• said first, second and third transformer cores having progressively greater thicknesses;
• said first, second and third transformer cores having first, second and third winding windows, respectively;
• said windows having substantially the same heights and widths;
• said first, second and third transformer cores being positioned in aligned spaced parallel relationship with said windows being aligned with each other;
• a main winding having a plurality of turns passing through said first, second and third windows and passing around portions of all of said cores;
• first, second and third regulator windings;
• said first regulator winding having a first number of turns passing through said first window and passing around a portion of said first core;
• said second regulator winding having a second number of turns passing through said second window and passing around a portion of said second core;
• and
• said third regulator winding having a third number of turns passing through said third window and passing around a portion of said third core.

A three-phase transformer for three-phase alternating current comprising:

• at least first, second and third ferromagnetic transformer cores;
• said transformer cores having substantially the same heights and widths;
• said first, second and third transformer cores being progressively greater in relative thickness;
• said first, second and third transformer cores having a pair of first, a pair of second and a pair of third winding windows, respectively;
• said windows having substantially the same heights and widths;
• said first, second and third transformer cores being positioned in aligned spaced parallel relationship with said pair of first windows being aligned with said pair of second windows being aligned with said pair of third windows;
• an "A" phase main winding having a number of turns;
• said "A" phase main winding passing through at least one of each of said first, second and third windows and passing around portions of said first, second and third cores and being electromagnetically coupled to said first, second and third cores;
• a "B" phase main winding having a number of turns equal to the number of turns in said "A" phase main winding;
• said "B" phase main winding passing through at least one of each of said first, second and third windows and passing around portions of said first, second and third cores and being electromagnetically coupled to said first, second and third cores;
• a "C" phase main winding having a number of turns equal to the number of turns in said "A" phase main winding and also equal to the number of turns in said "B" phase main winding;
• said "C" phase main winding passing through at least one of each of said first, second and third windows and passing around portions of said first, second and third cores and being electromagnetically coupled to said first, second and third cores;
• first, second and third "A" phase regulator windings having first, second and third numbers of turns, respectively;
• said first, second and third numbers of turns of said "A" phase regulator windings having relative values of N1, N2 and N3, respectively;
• first, second and third "B" phase regulator windings having first, second and third numbers of turns, respectively;
• said first, second and third numbers of turns of said "B" phase regulator windings having relative values of N1, N2 and N3, respectively;
• first, second and third "C" phase regulator windings having first, second and third numbers of turns, respectively;
• said first, second and third numbers of turns of said "C" phase regulator windings having relative values of N1, N2 and N3, respectively;
• said first, second and third "A" phase regulator windings passing respectively through a first, a second and a third window and passing respectively around portions of said first, second and third cores and electromagnetically individually coupling essentially solely to said first, second and third cores, respectively;
• said first, second and third "B" phase regulator windings passing respectively through a first, a second and a third window and passing respectively around portions of said first, second and third cores and electromagnetically individually coupling essentially solely to said first, second and third cores, respectively;
• said first, second and third "C" phase regulator windings passing respectively through a first, a second and a third window and passing respectively around portions of said first, second and third cores and electromagnetically individually coupling essentially solely to said first, second and third cores, respectively;
• and
• N1, N2 and N3 being substantially inversely proportional to the relative thicknesses of said first, second and third cores.