Deere & Company

David Michael Loken

Long Wu

Tianjun Fu

Sumit Dutta

Shuvam Gupta

Eric R Linn

Erich Joel Drees

Thomas J Roan

Christopher J Schmit

Robert B Shaw

Lav Thyagarajan

Neal D Clements

Richard E Wainwright

Christopher John Tremel

Yuheng Wu

Clement Vanden Godbold

Danielle Li

Jeffrey Scott Duppong

Morgan E Schlichtmann

Erich J Drees

A capacitor has a known capacitance value for filtering the ripple current of the DC voltage bus. A first modulation index estimator is configured to estimate a first modulation index of the first inverter. A second modulation index estimator configured to estimate a second modulation index of the second inverter. A current estimator is configured to estimate an interleaving phase shift angle associated with a respective one of a set of inverters based on the known capacitance value of the capacitor, the estimated first modulation index, the estimated second modulation index, the first control input and the second control input.

System and method for controlling parallel inverters coupled to common DC bus capacitor

In an example embodiment, a system includes a plurality of inverters configured to operate in at least one of a charging mode or a drive mode, a plurality of motors and at least one controller configured to selectively couple the plurality of inverters to the plurality of motors during a drive mode, and selectively couple at least one of the inverters to an alternating current (AC) source during the charging mode and decouple the at least one of the inverters from the plurality of motors during the charging mode.

Dual-purpose drive and charger systems and methods thereof

Each one of the secondary converters has a corresponding transformer having a primary winding associated with a primary alternating current (AC) signal and a secondary winding associated with a secondary alternating current (AC) signal. A secondary controller provides secondary control signals to the secondary semiconductor switches of the secondary converters with one or more time-synchronized, target phase offsets with respect to an observed phase of the alternating current signal (e.g., primary alternating current signal or the secondary alternating current signal) to provide the target phase offset (or targeted phase offsets) commensurate with or sufficient to support a required electrical energy transfer from the primary controller to the corresponding secondary controller (or secondary controllers).

System for controlling a direct-current-to-direct-current converter to provide electrical energy to a vehicle implement

A system for providing resonance damping is disclosed. The system comprises a power generation circuit arranged to supply power to a direct current (DC) bus. The DC bus comprises a first link conductor and a second link conductor arranged such that a current induced in either of the conductors generates a magnetic field having a plurality of magnetic flux lines that extend in a direction generally perpendicular to a first direction of current flow. At least one electronic circuit is coupled to the DC bus. A damping element is coupled to or arranged proximate the first link conductor and the second link conductor of the DC bus, and is arranged such that the plurality of magnetic flux lines induces a plurality of eddy currents having a second direction of current flow in at least one surface of the damping element to provide resonance damping of the system.

System and method for providing resonance damping

The first wall has a first inbound cavity for receiving a coolant from an inlet port. The first wall has a first outbound cavity for directing the coolant from the inbound cavity to the input of the transition passage. The second wall has a second inbound cavity for receiving a coolant from the output of the transition passage. The second wall has a second outbound cavity for directing the coolant from the inbound cavity to the outlet port. The transition passage comprises a transverse hollow volume for interconnecting the first outbound cavity of the first wall to the second inbound cavity of a second wall. At least one heat-generating component (e.g., inductor) in the interior of the housing generates heat that is dissipated.

Electrical assembly having cavities for coolant

A temperature estimation module estimates each junction temperature of a corresponding semiconductor device, among a plurality of semiconductor devices, for each phase of an inverter. The temperature estimation module or the data processing system determines a hottest device with a highest junction temperature among the semiconductor devices. A thermal adjustment module or data processing system determines if the highest junction temperature parameter is less than maximum junction temperature parameter for the respective semiconductor device or deciding whether or not to adjust a duty cycle of the semiconductor devices.

Method and inverter with thermal management for controlling an electric machine

A power electronics inverter includes a housing which forms a cold plate with coolant passages. The housing encloses an insulated gate bipolar transistor (IGBT), and a DC Link capacitor. The capacitor comprises a bus-bar which exits from a bottom side of the capacitor, and the bus-bar is positioned adjacent to the cold plate. The cold plate forms a cooling passage which underlies the IGBT and the capacitor bus-bar. Thermally conductive gap pads are located between the capacitor bus-bar and the cold plate.

Power electronics inverter with capacitor cooling

Growing community of inventors

West Fargo, ND, United States of America

David Michael Loken