Electric machine
AssigneeGE Energy Power Conversion Technology Limited
InventorStephane Mouty
Life of this patent
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Abstract
An electric machine, including a set of at least six windings, voltage supply devices capable of supplying an electrical phase, and a circuit for controlling the voltage supply devices controlling phase shifts between the phases supplied by the voltage supply devices, each voltage supply device supplying a phase at the end common to two windings, the other end of the two windings being supplied by one of the two voltage supply devices supplying a phase of which the phase shift with the phase supplied by the voltage supply device is one of the two lowest, in terms of absolute value, among the phase shifts supplied by the voltage supply devices and the phase supplied by the voltage supply device.
Claims17
A electrical machine, comprising:
- a set of at least six windings, each of the at least six windings comprising two ends, the windings being in a series configuration;
- voltage supply devices configured to supply electrical phases, the voltage supply devices being distributed in arrangements of at least three voltage supply devices;
- and
- a control circuit for the voltage supply devices, the control circuit configured to control phase shifts between the electrical phases supplied by the voltage supply devices,
- wherein each voltage supply device supplying a phase at an end common to two windings, another end of the two windings being supplied by one of the other voltage supply devices supplying a phase, of which the phase shift with the phase supplied by the voltage supply device is one of the two lowest, in terms of absolute value, among the phase shifts between the phases supplied by the other voltage supply devices and the phase supplied by the voltage supply device,
- wherein the voltage supply devices are configured to deliver a sinusoidal electrical signal with harmonic distortion rate less than or equal to 5%,
- wherein the control circuit comprises one control unit per each of the arrangements, each control unit is configured to impose a control law on the voltage supply devices of the arrangement controlled by the control unit, and
- wherein the control law is such that the phase shift between the phase supplied by a voltage supply device of an arrangement and the phase supplied by a voltage supply device having the phase shift that is the closest in the same arrangement is equal to 2π/n, where n is the number of the voltage supply devices of the arrangement.
Dependencies are inferred from the claim text.