Summing transformer for star-delta inverter having a single secondary winding for each group of primary windings
OwnerP. John Dhyanchand, Richard A. Arbanella +1inventors
InventorsP. John Dhyanchand, Richard A. Arbanella, Raghunath G. Mokadam
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Abstract
A summing transformer for a star-delta inverter having a single secondary winding for each group of primary windings for use in inverting variable frequency AC power into constant frequency AC power, the transformer comprising a plurality of core elements having principal legs on which primary windings are wound and secondary legs extending from said principal legs establishing flux paths, the legs of each core element defining apertures through which a single winding is magnetically linked to a group of primary windings.
Claims14
A summing transformer comprising:
- a plurality of spaced core elements, each core element comprising first, second, and third principal legs;
- a separate set of primary windings associated with each core element, each of the sets of primary windings consisting only of first, second, and third primary windings wrapped about the periphery of the first, second, and third principal legs, respectively, the primary windings in each set being connected directly to windings only from the associated core element and not directly to windings from other sets or other core elements;
- a first secondary winding wound about the first principal legs of the core elements;
- a second secondary winding wound about the second principal legs of the core elements;
- and
- a third secondary winding wound about the third principal legs of the core elements.
A summing transformer comprising:
- a plurality of spaced core elements, each core element comprising first, second, and third principal legs that are aligned linearly
- and two secondary legs that are aligned in parallel with said principal legs;
- a set of primary windings for each core element, each of the sets of primary windings consisting of first, second, and third primary windings wrapped about the periphery of the first, second, and third principal legs, respectively, the primary windings being connected directly to one another and not directly to other windings;
- a first secondary winding wound about the first principal legs of the core elements;
- a second secondary winding wound about the second principal legs of the core elements;
- and
- a third secondary winding wound about the third principal legs of the core elements.
A summing transformer comprising:
- a plurality of spaced core elements, each of the core elements comprising first, second, and third principal legs that are aligned linearly, connection points between the linearly-aligned principal legs;
- two secondary legs that are disposed at right angles to the principal legs at each of the connection points,
- and a secondary leg that is aligned in parallel with each of the principal legs;
- a set of primary windings for each core element, each of the sets of primary windings consisting of first, second, and third primary windings wrapped about the periphery of the first, second and third principal legs, respectively, the primary windings being connected directly to one another and not directly to other windings;
- a first secondary winding wound about the first principal legs of the core elements;
- a second secondary winding wound about the second principal legs of the cores elements;
- and
- a third secondary winding wound about the third principal legs of the core elements.
Dependencies are inferred from the claim text.