Abstract: A dual coil inductor apparatus is disclosed that includes a core, and inner coil, and an outer coil. The core may be formed of a ferromagnetic powder material in a one-piece toroidal shape. The inner coil winding is embedded within the core. The outer coil winding is wrapped radially around the outside of the core. A three-coil inductor apparatus is also disclosed that includes a core having common origin point with a first core loop lying in a x/y plane, a second core loop lying in a y/z plane, and a third core loop lying in a x/z plane. Windings around the core loops create magnetic fields in three planes when current is provided to the windings. The magnetic fields are orthogonal to each other and provide magnetically uncoupled inductors that may be provided with current separately or combined in series or parallel to potentially provide seven levels of induction.

Abstract: An inductor includes a magnetic core having opposing first and second plates spaced apart from each other and a plurality of cooling pillars extending from the first plate to the second plate. The pillars are positioned such that a network of channels is formed between the plates and the pillars. A conductor is arranged in a plurality of coils, Each of the coils are supported by one of the pillars such that the coils are disposed between the first and second plates to be cooled by the channels.

Abstract: A power electronics switching system has a power converter including switching elements respectively disposed in parallel paths. The system also has a controller that outputs switching commands for the switching elements derived from carrier waveforms and reference waveforms corresponding to the switching elements, and generates a shape for one of the carrier waveforms according to a difference in magnitudes between the reference waveforms such that the shape is of a first type responsive to the difference being greater than a first threshold and is of a second type different than the first type responsive to the difference being less than a second threshold.

Abstract: Methods and devices for balancing voltages of capacitors in an electronic circuit are provided. The device includes a chopper circuit having a chopper inductor. Further, the chopper circuit may detect voltages across capacitors as well as an output current of the electronic circuit. In addition, the device may include a chopper control unit receiving the output current then generating a signal representing charging of the chopper inductor based on the output current. Also, the chopper control unit may receive the voltages across the capacitors and detect an imbalance between the voltages based on a polarity of the output current. Additionally, the chopper control unit may transfer of charge between the two capacitors, using the chopper inductor. Further, the chopper inductor is substantially discharged, during the transfer of charge between the capacitors.

Abstract: Methods and devices for balancing voltages of capacitors in an electronic circuit are provided. The device includes a chopper circuit having a chopper inductor. Further, the chopper circuit may detect voltages across capacitors as well as an output current of the electronic circuit. In addition, the device may include a chopper control unit receiving the output current then generating a signal representing charging of the chopper inductor based on the output current. Also, the chopper control unit may receive the voltages across the capacitors and detect an imbalance between the voltages based on a polarity of the output current. Additionally, the chopper control unit may transfer of charge between the two capacitors, using the chopper inductor. Further, the chopper inductor is substantially discharged, during the transfer of charge between the capacitors.