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US 11,050,379 B1Granted
Circuit and method for start of single phase to three phase conversion system
AssigneeApplied Industrial Motors, LLC
InventorGlen Floreancig
Life of this patent
Estimating the term…
Abstract
A circuit for converting single phase power to three phase power and method of operation that automatically starts upon detection of a demand for three phase power from a three phase load connected to the circuit.
Claims20
A single phase to three phase converter circuit, comprising:
- a single phase power input;
- a three phase load switch with first, second, and third load switch input and output terminals and a load switch control terminal, the first, second, and third load switch input terminals coupled to the single phase power input;
- an idler motor switch with first, second, and third phase idler motor switch input terminals and output terminals and an idler motor switch control terminal, the first, second, and third phase idler motor switch input terminals coupled to the single phase power input;
- a sensor coupled to at least one of the first, second, and third load switch input and output terminals, the sensor configured to detect load power demand on at least one of the terminals;
- a first control signal that is operatively coupled to the load switch control terminal;
- a second control signal that is operatively coupled to the idler motor switch control terminal;
- wherein a three phase load is connectable to the single phase to three phase converter circuit and the first control signal controls the load switch control terminal to disconnect and connect the three phase load to the converter circuit, and an idler motor is connectable to the idler motor switch and the second control signal controls the idler motor switch to connect and disconnect the idler motor to the converter circuit.
4 more elements
A single phase to three phase converter circuit for auto-starting an idler motor, comprising:
- a single phase power input;
- a three phase load switch with first, second, and third load switch input and output terminals and a load switch control terminal, the first, second, and third load switch input terminals coupled to the single phase power input;
- an idler motor switch with first, second, and third phase idler motor switch input terminals and output terminals and an idler motor switch control terminal, the first, second, and third phase idler motor switch input terminals coupled to the single phase power input;
- a sensor coupled to at least one of the first, second, and third load switch output terminals, the sensor configured to detect load power demand on at least one of the first, second, and third load switch output terminals;
- and
- a switch control circuit operatively coupled to the sensor, the load switch control terminal, and the idler motor switch control terminal;
- wherein an idler motor has first, second, and third phase input terminals that are respectively connectible to the first, second, and third phase idler motor switch output terminals, and the switch control circuit controls the three phase load switch and the idler motor switch based on a detection of load power demand by the sensor.
4 more elements
A method of converting single phase power to three phase power, comprising:
- detecting a power demand on at least one of first, second, or third phase conductors that are connectable to a three phase load;
- disconnecting the three phase load from the first, second, and third phase conductors upon detection of the demand for power;
- starting an idler motor that is connectable to the first, second, or third phase conductors;
- and
- connecting the three phase load to the first, second, or third phase conductors.
2 more elements
Dependencies are inferred from the claim text.