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US 2019/0165566 A1Published application
Circuit for loss of phase detection
AssigneeRegal Beloit America, Inc.
InventorsZachary Joseph Stauffer, Luis D. Morales, Maung Saw Eddison
Life of this patent
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Abstract
A circuit for detecting loss of phase in three-phase power systems. The circuit includes a current sensor and a microprocessor. The current sensors are coupled to respective phases of a three-phase power source configured to supply power to a load. The microprocessor is coupled to the current sensors to process current measurements and detect loss of phase in the three-phase power source.
Claims20
A circuit comprising:
- a plurality of current sensors coupled to respective phases of a three-phase power source configured to supply power to a load;
- and
- a microprocessor coupled to said plurality of current sensors and configured to:
- receive current measurements from said plurality of current sensors;
- and
- detect a loss of at least one of the respective phases based on the current measurements.
3 more elements
A circuit comprising:
- a plurality of alternating current (AC) buses configured to be coupled to a three-phase power source;
- a direct current (DC) bus;
- an AC to DC converter coupled to said plurality of AC buses and said DC bus, said AC to DC converter configured to convert AC power to DC power;
- a current sensor coupled to said DC bus;
- and
- a microprocessor coupled to said current sensor and configured to:
- receive current measurements from said current sensor;
- and
- detect a loss of at least one phase of the three-phase power source by comparing current measurements from said current sensor to a predetermined expected current value for a loss of phase condition.
6 more elements
A method for detecting a loss of phase in three-phase equipment, the method comprising:
- measuring amplitudes of a plurality of current measurements from a plurality of current sensors coupled to respective phases of the three-phase power source;
- receiving, at a microprocessor, current measurements from the plurality of current sensors coupled to respective phases of the three-phase power source;
- comparing the plurality of current measurements from the plurality of current sensors to one another;
- and
- detecting a loss of phase of at least one of the respective phases based on the current measurements from the plurality of current sensors.
2 more elements
Dependencies are inferred from the claim text.