Power conditioning circuit utilizing high oersted rating inductors
A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over conductors in a polyphase system includes first and second phase conductors. First and second inductors are connected in series between the first and second phase conductors and first and second phase output lines, wherein all of the power supplied by the power source to the first and second phase output lines flows through the first and second inductors. An inductance of each of the first and second inductors increases when power at frequencies greater than the nominal frequency flows through the first and second phase conductors, thereby blocking power at frequencies greater than the nominal frequency from reaching the first and second phase output lines.
1. A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over conductors in a polyphase system, comprising:
a first phase conductor;
a second phase conductor;
a first inductor connected in series between the first phase conductor and a first output line, wherein power supplied by the power source to the first output line flows through the first inductor; and
a second inductor connected in series between the second phase conductor and a second output line, wherein power supplied by the power source to the second output line flows through the second inductor;
wherein an inductance of each of the first inductor and the second inductor increases when power at frequencies greater than the nominal frequency flows through the first phase conductor and the second phase conductor, thereby blocking power at frequencies greater than the nominal frequency from reaching the first output line and the second output line.
2. The power conditioning circuit of claim 1 , comprising:
a neutral conductor;
a ground conductor;
a third inductor connected in series between the neutral conductor and a third output line; and
a fourth inductor connected in series between the ground conductor and a fourth output line.
3. The power conditioning circuit of claim 2 , comprising:
a first metal oxide varistor connected across the first phase conductor and the ground conductor to create a resistance between the first phase conductor and the ground conductor, wherein the resistance varies inversely with the magnitude of the voltage between the first phase conductor and the ground conductor; and
a second metal oxide varistor connected across the second phase conductor and the ground conductor.
4. The power conditioning circuit of claim 3 , comprising:
a third metal oxide varistor connected across the first phase input conductors and the neutral conductor; and
a fourth metal oxide varistor connected across the second phase input conductor and the neutral conductor.
5. The power conditioning circuit of claim 4 , comprising:
a fifth metal oxide varistor connected across the neutral conductor and the ground conductor.
6. The power conditioning circuit of claim 1 , wherein the inductors each have an Oersted rating that is higher than a magnetic field driven by a maximum rated alternating current of the inductors.
7. The power conditioning circuit of claim 6 , wherein the inductors having the high Oersted rating avoid saturation when driven by the maximum rated alternating current.
8. The power conditioning circuit of claim 1 , comprising:
a capacitor connected across the first output line and the second output line.
9. A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over conductors in a polyphase system, comprising:
a first phase conductor;
a second phase conductor;
a first inductor connected in series between the first phase conductor and a first output line, wherein power supplied by the power source to the first output line flows through the first inductor;
a second inductor connected in series between the second phase conductor and a second output line, wherein power supplied by the power source to the second output line flows through the second inductor; and
a first metal oxide varistor connected across the first output line and the second output line;
wherein the first inductor and the second inductor have an increasing inductance with an increasing applied frequency and an oersted rating that is high enough to avoid saturation when driven by the maximum rated alternating current.
10. The power conditioning circuit of claim 9 , comprising:
a second metal oxide varistor connected across the first phase conductor and the second phase conductor.
11. The power conditioning circuit of claim 10 , comprising:
a third metal oxide varistor, wherein the second metal oxide varistor is connected across the first phase conductor and a ground conductor.
12. The power conditioning circuit of claim 11 , comprising:
a fourth metal oxide varistor, wherein the third metal oxide varistor is connected across the second phase conductor and the ground conductor.
13. The power conditioning circuit of claim 9 , comprising:
a third inductor connected in series with a ground conductor, wherein power supplied by the power source to the ground conductor flows through the third conductor.
14. The power conditioning circuit of claim 13 , wherein the third inductor has an increasing inductance with an increasing applied frequency and an Oersted rating that is high enough to avoid saturation when driven by the maximum rated alternating current.
15. The power conditioning circuit of claim 9 , comprising:
a second metal oxide varistor connected across the first output line and a ground conductor.
16. The power conditioning circuit of claim 15 , comprising:
a third metal oxide varistor connected across the second output line and the ground conductor.
17. A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over conductors in a polyphase system, comprising:
a plurality of phase conductor inputs;
a plurality of phase conductor outputs;
a plurality of inductors, wherein each inductor, in the plurality of inductors, has an inductance that increases with frequency and each inductor is connected in series between a phase conductor input, in the plurality of phase conductor inputs, and a phase conductor output, in the plurality of phase conductor outputs; and
at least a first metal oxide varistor connected across two phase conductor inputs, in the plurality of phase conductor inputs;
wherein the first inductor and the second inductor have an increasing inductance with an increasing applied frequency.
18. The power conditioning circuit of claim 17 , comprising:
at least a second metal oxide varistor connected across two phase conductor outputs, in the plurality of phase conductor outputs.
19. The power conditioning circuit of claim 17 , comprising:
a ground line input;
a ground line output;
a ground line inductor connected in series between the ground line input and the ground line output; and
at least a second metal oxide varistor connected across the ground line input and a phase conductor input, in the plurality of phase conductor inputs.
20. The power conditioning circuit of claim 17 , comprising:
a neutral line input;
a neutral line output;
a neutral line inductor connected in series between the neutral line input and the neutral line output; and
at least a second metal oxide varistor connected across the neutral line input and a phase conductor input, in the plurality of phase conductor inputs.