Cavitation detection device and method
First Claim
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1. A method for sensing cavitation in a pump driven by a motor, comprising:
- generating a power factor signal;
analyzing the power factor signal; and
determining the presence of cavitation based on the analysis of the power factor signal.
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Abstract
Cavitation detection systems and methods include generating a signal representing the power factor of a motor driving a pump, analyzing the power factor signal and determining the presence of cavitation based on the analysis of the power factor signal. The power factor may be estimated using various estimation schemes. Analyzing the signal includes filtering the power factor signal.
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Citations
40 Claims
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1. A method for sensing cavitation in a pump driven by a motor, comprising:
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generating a power factor signal; analyzing the power factor signal; and determining the presence of cavitation based on the analysis of the power factor signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for sensing cavitation in a pump driven by a motor, comprising:
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generating a power factor signal; analyzing the power factor signal; and determining the presence of cavitation based on the analysis of the power factor signal, wherein determining the presence of cavitation includes compensating for a loss of flow. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A pump system, comprising:
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a motor including a stator, a rotor situated relative to the stator to rotate relative to the stator, and a plurality of phase windings situated within the stator; a power source connected to the windings to output AC power thereto; and a controller connected to the power source, the controller programmed to detect cavitation by analyzing a power factor signal. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A cavitation detection system, comprising:
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a controller providing control signals to a power source for selectively energizing phase windings of a motor driving a pump; the controller analyzing a power factor signal and detecting cavitation in response thereto. - View Dependent Claims (25, 26, 27, 28)
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29. A pump system, comprising:
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a motor including a stator, a rotor situated relative to the stator to rotate relative to the stator, and a plurality of phase windings situated within the stator; a power source connected to the windings to output AC power thereto; and a controller connected to the rower source, the controller programmed to detect cavitation by analyzing a power factor signal, wherein detecting cavitation includes compensating for a loss of flow. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. A cavitation detection system, comprising:
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a controller providing control signals to a power source for selectively energizing phase windings of a motor driving a pump; the controller analyzing a power factor signal and detecting cavitation in response thereto, wherein detecting cavitation includes compensating for a loss of flow. - View Dependent Claims (37, 38, 39, 40)
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Specification