This article presents a 100-kW switched tank converter (STC) using SiC mosfet s for transportation power electronic systems. This bidirectional dc–dc converter targets 300–600 V voltage conversion. Total semiconductor loss index has been proposed to evaluate topology and device technologies. The boost converter and one-cell STC have been fairly compared by utilizing this index. The STC design procedures, including SiC mosfet , heat sink, resonant tank components, and dc capacitors, are explained in detail. The simulation results of a 100-kW one-cell STC working at zero-current switching mode have been provided. A 100-kW first-generation hardware prototype using 1200 V, 600 A SiC power module has been built and tested. The power density of the main circuit is about 42 kW/L. The desirable thermal performance of the hardware prototype is demonstrated, which is consistent with the theoretical design. The measured efficiency reaches peak 98.7% at around 30 kW, about 98.5% at 50 kW, and 97.4% at 100 kW full load.

/pdf/a-100-kw-sic-switched-tank-converter-for-transportation-24anc937vm.pdf

A 100-kW SiC Switched Tank Converter for Transportation Electrification

A hybrid-electric vehicle method of controlling a hybrid electric vehicle is provided. The vehicle includes a traction battery, at least two electric-machines, and a controller. The controller is configured to, in response to a faulted condition one of the electric-machines during a drive cycle, command the other of the electric-machines to function in a mode in which torque output is restricted to a threshold value that depends on a voltage of the battery to maintain vehicle propulsion during the drive cycle.

Control strategy for an electric machine in a vehicle

A vehicle powertrain includes a bypass diode and a controller. The bypass diode is configured to clamp an inverter DC terminal voltage to a battery voltage. The controller is configured to, while the terminal voltage is within a predetermined range of the battery voltage, maintain off a lower IGBT of a DC-DC converter while in a propulsion mode, and modulate the lower IGBT to increase the terminal voltage to maintain the bypass diode reverse biased while in a regenerative mode.

Variable voltage convert system with reduced bypass diode conduction

This application relates to methods, apparatus, and systems for throttling a subsystem of a computing device, when a current demanded by the subsystem exceeds a threshold value, in order to protect a power supply providing the current to the subsystem By reducing the current demanded by the subsystem, the subsystem can be powered by a power supply having a smaller dynamic current range than the subsystem, thereby removing the need to provide a larger power supply for the subsystem The demand current is measured before the current provided by the power supply significantly increases and a transient current source providing current to the subsystem is depleted In this way, the subsystem can be throttled before the power supply is aware of an increase in the current demand

Peak current management

This paper compares three different dc-dc topologies, i.e. boost converter, three-level flying capacitor multilevel converter (FCMC)and one-cell switching tank converter (STC)for a 100 kW electric vehicle power electronic system. This bidirectional dc-dc converter targets 300 V-600 V voltage conversion. Total semiconductor loss index (TSLI)has been proposed to evaluate topologies and device technologies. The boost converter and one-cell STC have been fairly compared by utilizing this index. The simulation results of a 100 kW one-cell STC working at zero current switching (ZCS)mode have been provided. A 100 kW hardware prototype using 1200 V 600 A SiC power module has been built. The estimated efficiency is about 99.2% at 30 kW, 99.13% at half load, and 98.64% at full load. The power density of the main circuits is about 42 kW/L.

A Comparison of 100 kW SiC DC-DC Converters for Electric Vehicles

A power conversion circuit includes a variable voltage converter (VVC) with a stabilizing means for stabilizing its output voltage. The stabilizing means can be in the form of a diode that clamps the VVC output voltage to the VVC input voltage so that the output voltage does not drop below the input voltage when a load imposes a sudden power demand. The stabilizing means also enables a bypass mode in which transient power can be provided from a power source to an inverter without current flow through the VVC inductor or switches. When embodied as a diode, the stabilizing means can increase the maximum power that can be transferred by the power conversion circuit, improve the power response of the circuit, minimize control instability, and reduce power losses.

Variable Voltage Converter with Direct Output Voltage Clamping

Variable voltage converter with stabilized output voltage

Variable voltage converter with direct output voltage clamping for inverter system controller

Eine Leistungswandler-Schaltung weist einen variablen Spannungswandler (VVC) auf mit einem Mittel zum Stabilisieren zum Stabilisieren der Ausgangsspannung desselben. Das Mittel zum Stabilisieren kann die Form einer Diode aufweisen, welche die VVC-Ausgangsspannung an die VVC-Eingangsspannung derart klemmt, dass die Ausgangsspannung nicht unter die Eingangsspannung abfallt, wenn eine Last einen plotzlichen Leistungsbedarf verursacht. Das Mittel zum Stabilisieren ermoglicht auch einen Umgehungsmodus, in dem durchgeleitete Leistung von einer Stromquelle zu einem Inverter bereitgestellt werden kann, ohne ein Fliesen von Strom durch die Induktionsspule oder die Schalter des VVC. Wenn als Diode ausgefuhrt, kann das Mittel zum Stabilisieren die maximale Leistung erhohen, welche durch die Leistungswandler-Schaltung ubertragen werden kann, das Ubertragungsverhalten der Schaltung verbessern, Instabilitat der Steuerung minimieren und Energieverluste reduzieren.

Variabler spannungswandler mit direkter klemmung der ausgangsspannung

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Variable Voltage Converter with Direct Output Voltage Clamping

Variable voltage converter with stabilized output voltage

Variable voltage converter with direct output voltage clamping for inverter system controller

Variabler spannungswandler mit direkter klemmung der ausgangsspannung