Cable configured to reduce a radiated electromagnetic field
A transmission cable to reduce radiated electromagnetic radiation includes a first conductor with current flowing in a positive direction, a second conductor with a current flowing in a negative direction, where the negative direction is opposite the positive direction and the current in the first conductor equal to the current in the second conductor, a third conductor with current flowing in the positive direction and a fourth conductor with a current flowing in the negative direction. The current in the third conductor is equal to the current in the fourth conductor. The first conductor, the second conductor, the third conductor, and the fourth conductor are arranged in a symmetrical square pattern and the conductors are each on a corner of the square pattern. The first conductor is opposite the third conductor and adjacent to the second conductor and the fourth conductor.
1. A transmission cable comprising:
a first conductor with current flowing in a positive direction;
a second conductor with a current flowing in a negative direction, the negative direction opposite the positive direction, the current in the first conductor equal to the current in the second conductor;
a third conductor with current flowing in the positive direction;
a fourth conductor with a current flowing in the negative direction, the current in the third conductor equal to the current in the fourth conductor, wherein the first conductor, the second conductor, the third conductor, and the fourth conductor are arranged in a symmetrical square pattern from a beginning to an end of the cable, the conductors each on a corner of the square pattern, the first conductor opposite the third conductor and adjacent to the second conductor and the fourth conductor; and
one or more signal conductors located in a center of the square pattern, wherein the first, second, third and fourth conductors are alternating current (“AC”) power transmission conductors and the one or more signal conductors transmit data associated with power transmission of the first, second, third and fourth conductors.
2. The transmission cable of claim 1 , further comprising grounded conductors surrounding the one or more signal conductors.
3. The transmission cable of claim 2 , further comprising insulation between the one or more signal conductors and the grounded conductors and insulation between the grounded conductors and the first, second, third and fourth conductors.
4. The transmission cable of claim 1 , wherein each of the first conductor, the second conductor, the third conductor, and the fourth conductor comprise litz wire.
5. The transmission cable of claim 1 , wherein the first conductor and the second conductor are part of a first circuit, and the third conductor and the fourth conductor are part of a second circuit.
6. The transmission cable of claim 1 , wherein the current in the first and second conductors is equal to the current in the third and fourth conductors.
7. The transmission cable of claim 1 , wherein the first, second, third and fourth conductors each comprise an insulating sheath and further comprising an outer sheath surrounding the conductors in the square pattern, the outer sheath rated for underground installation.
8. The transmission cable of claim 7 , wherein the outer sheath is watertight.
9. The transmission cable of claim 7 , wherein the transmission cable transmits power between a wireless power transmission (“WPT”) pad and a converter within a WPT system.
10. A transmission cable comprising:
a first conductor with current flowing in a positive direction;
a second conductor with a current flowing in a negative direction, the negative direction opposite the positive direction, the current in the first conductor equal to the current in the second conductor;
a third conductor with current flowing in the positive direction;
a fourth conductor with a current flowing in the negative direction, the current in the third conductor equal to the current in the fourth conductor, wherein the first conductor, the second conductor, the third conductor, and the fourth conductor are alternating current (“AC”) power transmission conductors and are arranged in a symmetrical square pattern from a beginning to an end of the cable, the conductors each on a corner of the square pattern, the first conductor opposite the third conductor and adjacent to the second conductor and the fourth conductor;
a signal conductor located in a center of the square pattern, wherein the signal conductor transmits data associated with power transmission of the first, second, third and fourth conductors;
grounded conductors surrounding the signal conductor; and
insulation between the signal conductor and the grounded conductors and insulation between the grounded conductors and the first, second, third and fourth conductors.
11. The transmission cable of claim 10 , wherein each of the first conductor, the second conductor, the third conductor, and the fourth conductor comprise litz wire.
12. The transmission cable of claim 10 , wherein the first conductor and the second conductor are part of a first circuit, and the third conductor and the fourth conductor are part of a second circuit.
13. The transmission cable of claim 10 , wherein the current in the first and second conductors is equal to the current in the third and fourth conductors.
14. The transmission cable of claim 10 , wherein the first, second, third and fourth conductors each comprise an insulating sheath and further comprising an outer sheath surrounding the conductors in the square pattern, the outer sheath rated for underground installation.
15. The transmission cable of claim 14 , wherein the outer sheath is watertight.
16. The transmission cable of claim 14 , wherein the transmission cable transmits power between a wireless power transmission (“WPT”) pad and a converter within a WPT system.
17. A transmission cable comprising:
a first conductor with current flowing in a positive direction;
a second conductor with a current flowing in a negative direction, the negative direction opposite the positive direction, the current in the first conductor equal to the current in the second conductor;
a third conductor with current flowing in the positive direction;
a fourth conductor with a current flowing in the negative direction, the current in the third conductor equal to the current in the fourth conductor, wherein the first conductor, the second conductor, the third conductor, and the fourth conductor each comprise litz wire, each comprise an outer sheath, are alternating current (“AC”) power transmission conductors and are arranged in a symmetrical square pattern from a beginning to an end of the cable, the conductors each on a corner of the square pattern, the first conductor opposite the third conductor and adjacent to the second conductor and the fourth conductor;
a signal conductor located in a center of the square pattern, wherein the signal conductor transmits data associated with power transmission of the first, second, third and fourth conductors;
grounded conductors surrounding the signal conductor;
insulation between the signal conductor and the grounded conductors and insulation between the grounded conductors and the first, second, third and fourth conductors;
an outer sheath surrounding the conductors in the square pattern, the outer sheath rated for underground installation,
wherein the current in the first and second conductors is equal to the current in the third and fourth conductors.