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US 11,387,764 B2Granted
Multi-inverter system for electric machine
AssigneeZunum Aero, Inc.
InventorsWaleed Said, Chenggang Mei
Life of this patent
Estimating the term…
Abstract
An electric motor may comprise a rotor and a stator. One or more first cables connected to a first power converter circuit of are wrapped adjacent to at least some stator teeth of a stator core to form at least a first portion of one or more coil windings. One or more second cables connected to a second power converter circuit of the plurality of power converter circuit also may be wrapped adjacent to at least some of the stator teeth to form at least a second portion of the one or more coil windings.
Claims17
A device comprising:
- a power bus;
- a stator core;
- a rotor disposed within the stator core;
- a plurality of power converter circuits coupled to the power bus;
- and
- a plurality of first cables coupled to a first power converter circuit of the plurality of power converter circuits and wrapped to a first portion of the stator core to form at least a first portion of one or more coil windings;
- a plurality of second cables coupled to a second power converter circuit of the plurality of power converter circuits and wrapped to a second portion of the stator core to form at least a second portion of the one or more coil windings, the first portion of the stator core and the second portion of the stator core overlapping on a first overlapped portion of the stator core;
- and
- a plurality of third cables coupled to a third power converter circuit of the plurality of power converter circuits, wherein:
- at least one of the first cables and at least one of the second cables are wrapped adjacently together in intimate proximity over the first overlapped portion of the stator core and in a same winding path over one or more stator teeth of the stator core;
- the first power converter circuit is adaptable to provide a first voltage waveform signal to the at least one of the first cables and the second power converter circuit is adaptable to provide a second voltage waveform signal to the at least one of the second cables, the first and second voltage waveform signals being substantially identical so as to constructively induce a first combined magnetic flux to at least a first one of the one or more stator teeth;
- the at least one of the third cables is wrapped to a third portion of the stator core, the second portion of the stator core and the third portion of the stator core overlapping on a second overlapped portion of the stator core, wherein the at least one of the second cables and the at least one of the third cables are wrapped adjacently together in intimate proximity over the second overlapped portion of the stator core;
- and
- the third power converter circuit is adaptable to provide a third voltage waveform signal to the at least one of the third cables that is substantially identical to the first and second voltage waveform signals such that currents in the at least one of the second cables and the at least one of the third cables constructively induce a second combined magnetic flux to at least a second one of the one or more stator teeth.
11 more elements
A method comprising:
- applying a first voltage waveform signal, from a first power converter circuit, to at least one cable of a plurality of first cables connected to the first power converter circuit, the at least one cable of the first cables being wrapped to a first portion of a stator core to form at least a first portion of one or more coil windings;
- applying a second voltage waveform signal, from a second power converter circuit, to at least one cable of a plurality of second cables connected to the second power converter circuit, the at least one of the second cables being wrapped to a second portion of the stator core to form at least a second portion of the one or more coil windings, the first and second portions of the stator core overlapping on a first overlapped portion of the stator core;
- and
- applying a third voltage waveform signal, from a third power converter circuit,
- wherein:
- the at least one of the first cables and the at least one of the second cables are wrapped adjacently together in intimate proximity over the first overlapped portion of the stator core and in a same winding path over one or more stator teeth of the stator core;
- the first and second voltage waveform signals are substantially identical so as to constructively induce a first combined magnetic flux to at least a first one of the one or more stator teeth;
- at least one of a plurality of third cables is wrapped to a third portion of the stator core, the second portion of the stator core and the third portion of the stator core overlapping on a second overlapped portion of the stator core, wherein the at least one of the plurality of second cables and the at least one of the third cables are wrapped adjacently together in intimate proximity over the second overlapped portion of the stator core;
- and
- the third voltage waveform signal is substantially identical to the first and second voltage waveform signals such that currents in the at least one of the second plurality of cables and the at least one of the third cables constructively induce a second combined magnetic flux to at least a second one of the one or more stator teeth.
7 more elements
Dependencies are inferred from the claim text.