Winding fault detection system
First Claim
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1. A control system, comprising:
- an electric machine coupled to provide power to or receive power from a DC bus;
a controller in communication with the electric machine and the DC bus, the controller being configured to;
receive an indication of a measured voltage of the DC bus;
average the measured voltage of the DC bus over a period of time;
determine a difference between the average voltage of the DC bus and the measured voltage of the DC bus;
determine, based on the difference between the average voltage of the DC bus and the measured voltage of the DC bus, whether to indicate a fault of at least one winding of the electric machine; and
when it is determined to indicate a fault of at least one winding of the electric machine, generate a signal to initiate a precaution.
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Abstract
A control system is disclosed. The control system has an electric machine coupled to provide power to or receive power from a DC bus and a controller in communication with the electric machine and the DC bus. The controller is configured to receive a voltage from the DC bus, compare the voltage from the DC bus to a characteristic indicative of a fault of at least one winding of the electric machine, and take a precaution based on the comparison.
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Citations
17 Claims
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1. A control system, comprising:
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an electric machine coupled to provide power to or receive power from a DC bus; a controller in communication with the electric machine and the DC bus, the controller being configured to; receive an indication of a measured voltage of the DC bus; average the measured voltage of the DC bus over a period of time; determine a difference between the average voltage of the DC bus and the measured voltage of the DC bus; determine, based on the difference between the average voltage of the DC bus and the measured voltage of the DC bus, whether to indicate a fault of at least one winding of the electric machine; and when it is determined to indicate a fault of at least one winding of the electric machine, generate a signal to initiate a precaution. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting a winding fault, comprising:
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providing power to or receiving power from an electric machine via a DC bus; receiving an indication of a measured voltage of the DC bus; averaging the measured voltage of the DC bus over a period of time; determining a difference between the average voltage of the DC bus and the measured voltage of the DC bus; indicating a fault of at least one winding of the electric machine based on the determined difference between the average voltage of the DC bus and the measured voltage of the DC bus; and responsive to an indication of a fault of at least one winding of the electric machine, generating a signal to initiate a precaution. - View Dependent Claims (7, 8, 9, 10)
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11. A machine, comprising:
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a combustion engine configured to power operations of the machine; a motor arranged to move the machine; a generator coupled to receive a mechanical power input from the combustion engine, and provide electrical power output through a DC bus to the motor; and a controller in communication with the generator, the motor, and the DC bus, the controller being configured to; receive an indication of a measured voltage of the DC bus; average the measured voltage of the DC bus over a period of time; determine a difference between the average voltage of the DC bus and the measured voltage of the DC bus; determine whether to indicate a winding fault of at least one of the motor and the generator based on the determined difference between the average voltage of the DC bus and the measured voltage of the DC bus; and generate a signal to initiate a precaution responsive to a determination to indicate a winding fault of at least one of the motor and the generator. - View Dependent Claims (12, 13, 14)
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15. A method for detecting a winding fault, comprising:
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providing power to or receiving power from an electric machine via a DC bus; receiving an indication of a measured voltage of the DC bus; averaging the measured voltage of the DC bus over a period of time; identifying a fault of at least one winding of the electric machine based on; (1) the measured voltage of the DC bus, and (2) the average voltage of the DC bus; and generating a signal to initiate a precaution when a fault of at least one winding of the electric machine is identified.
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16. A fault detection system for detecting a winding fault in an electric machine providing power to or receiving power from a DC bus, the system comprising:
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an averaging unit configured to receive a measured voltage of the DC bus, and to determine an average of the measured voltage of the DC bus over a period of time; a threshold detector configured to provide a threshold signal indicating when a difference between the average voltage of the DC bus and the measured voltage of the DC bus is greater than a threshold voltage; and a signal processor configured to identify a fault in the winding of the electric machine based on the threshold signal, and to initiate a precaution when a fault in the winding of the electric machine is identified. - View Dependent Claims (17)
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Specification