Method and system for power conversion
AssigneeGeneral Electric Company
InventorsAllen Michael Ritter, Robert Allen Seymour, Rajib Datta, John Douglas D'Atre
Life of this patent
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Abstract
A method and system for a commutation control circuit are provided. The system includes an integrating voltage counter electrically coupled to an electrical power bus, wherein the integrating voltage counter is configured to integrate over time a voltage signal received from the power bus and to generate a trigger signal when the integrated voltage signal equals a predetermined count. The system also includes a plurality of transistor pairs configured to receive a trigger signal generated by the integrating voltage counter and electrically coupled to respective windings of a motor.
Claims17
A commutation control circuit comprising:
- an integrating voltage counter electrically coupled to an electrical power bus, said integrating voltage counter configured to integrate over time a voltage signal received from the power bus;
- a comparator configured to compare the integrated voltage signal to a predetermined threshold and to generate a trigger signal when the integrated voltage signal equals the predetermined threshold;
- and
- a plurality of transistor pairs configured to receive a trigger signal generated by said comparator and electrically coupled to respective electrical windings.
A method of commutating a power converter, said method comprising:
- integrating a voltage signal of at least one of a DC link of the power converter, an input of the power converter, and an output of the power converter that includes a direct current component and a disturbance component to generate an integrated voltage value;
- comparing the integrated voltage value to a predetermined threshold;
- and
- triggering a commutation of the power converter when the integrated voltage value equals the predetermined threshold.
A power converter system comprising:
- an input assembly including at least one converter;
- an output assembly including a plurality of transistor pairs electrically coupled to respective motor windings;
- and
- a direct current (DC) link electrically coupled between said input assembly and said output assembly;
- a control unit comprising an integrating voltage counter and configured to:
- receive a voltage signal from at least one of the DC link and an output of the output assembly;
- integrate the voltage signal with respect to time to produce a pulse train;
- increment a counter responsive to the pulse train;
- and
- trigger a change of state of said output assembly using the incrementing of the counter.
Dependencies are inferred from the claim text.