Patent ID: 10355631

Abstract:
A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator is configurable to operate in a first configuration or a second configuration depending on a synchronous speed of the electric machine. A controller can configure an operational mode of the current regulator by selecting, based on the synchronous speed of the electric machine, either the first configuration of the current regulator or the second configuration of the current regulator as a currently active configuration, and can then execute the current regulator in accordance with the currently active configuration. The first configuration of the current regulator comprises a first set of elements and cross-coupling gain blocks, whereas the second configuration of the current regulator can include the first set of elements without the cross-coupling gain blocks. The first set elements can vary depending on the implementation, but can generally include: summing junctions, integrators, and gain blocks. In one embodiment, the current regulator is configured to operate as a complex vector current regulator when configured in the first configuration, and is configured to operate as a state feedback decoupling (SFbD) current regulator when configured in the second configuration.