Circuit and fault tolerant assembly including such circuit
A circuit is provided that provides for the same power characteristics to an assembly of electrical resistive elements wired in parallel as to the assembly as wired in series. An input power source provides electrical resistive power to a plurality of load elements, wherein the plurality of load elements are connected in parallel to each other. A plurality of power splitters divide the power source into separate and equal power subsources such that there is one power splitter and one power subsource for each load element, wherein the power provided to each of the plurality of load elements is equal to the power of the electrical power source. Redundancy and fault tolerance is provided to the circuitry by permitting remaining load elements to continue to operate should one or more load elements fail.
1. A method for proportioning power to a load, comprising:
dividing an electrical resistive load among a plurality of load elements, the plurality of load elements electrically connected in parallel; and
dividing an AC power source into a plurality of separate and equal power subsources by repeatedly:
(a) time proportioning the AC power source, and
(b) applying a half-cycle of the time-proportioned AC power source sequentially to each of the plurality of load elements,
wherein a sum of the power provided to the plurality of load elements is equal to the power of the AC power source.
2. The method according to claim 1 , including proportioning the electrical power with time to match the electrical power to each power subsource with its respective load element.
3. The method according to claim 1 , wherein a Unity Power Factor is realized at the AC power source.
4. The method according to claim 1 , wherein any one of the plurality of load elements has redundancy with a second of the plurality of load elements.
5. The method according to claim 4 , wherein a failure of any one of the plurality of load elements results in a non-zero reduction in the sum of the power.
6. The method according to claim 4 , comprising providing an indicator of a failure condition.
7. The method according to claim 1 , comprising regulating the AC power source prior to the step of time proportioning.
8. The method according to claim 7 , wherein regulating controls a phase angle of the AC power source.
9. A method for proportioning power to a load, comprising:
dividing an electrical resistive load among a plurality of load elements, the plurality of load elements electrically connected in parallel; and
dividing an AC power source into a plurality of separate and equal power subsources by repeatedly:
(a) phase-angle controlling the AC power source, and
(b) applying a half-cycle of the phase-angle controlled AC power source sequentially to each of the plurality of load elements,
wherein a sum of the power provided to the plurality of load elements is equal to the power of the AC power source.