Method and system for detecting faults in a brushless exciter
First Claim
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1. A method of operating an electrical machine comprising:
- providing a brushless excitation system including a diode rectifier having at least one diode;
sensing heat energy generated by at least one resistor connected in parallel with the at least one diode;
wirelessly transmitting a signal representative of the heat energy;
detecting a deviation of generated heat energy from the at least one resistor, andgenerating a signal indicating an error if the deviation in generated heat energy exceeds a predetermined threshold.
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Abstract
A method of operating an electrical machine is provided. The method includes the steps of providing a brushless excitation system including a diode rectifier having at least one diode, sensing heat energy generated by at least one resistor connected in parallel with the at least one diode, wirelessly transmitting a signal representative of the heat energy, detecting a deviation of generated heat energy from the at least one resistor, and generating a signal indicating an error if the deviation in generated heat energy exceeds a predetermined threshold.
11 Citations
20 Claims
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1. A method of operating an electrical machine comprising:
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providing a brushless excitation system including a diode rectifier having at least one diode; sensing heat energy generated by at least one resistor connected in parallel with the at least one diode; wirelessly transmitting a signal representative of the heat energy; detecting a deviation of generated heat energy from the at least one resistor, and generating a signal indicating an error if the deviation in generated heat energy exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A brushless excitation system for an electrical machine comprising:
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a diode rectifier configured to be electrically coupled to a source of alternating current, the diode rectifier having a plurality of diodes configured to produce direct current applied to field windings of a rotor of the electrical machine; a plurality of resistors, a resistor in the plurality of resistors connected in parallel with a diode in the diode rectifier; a plurality of wireless temperature sensors proximate to the plurality of resistors, wherein one wireless temperature sensor of the plurality of wireless temperature sensors is configured to sense temperature from one resistor in the plurality of resistors; and a controller receiving temperature data indicative of temperature signals from the plurality of resistors, wherein the controller detects whether one or more diodes in the diode rectifier is faulty based on the temperature data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification