The advent of a 42 V bus system for future automobile designs allows a key advantage over existing 14V systems - ease of integration of the starter motor and alternator into one machine. A principle component of the 42V ISA (integrated starter alternator) system will be a three-phase inverter/rectifier, responsible for supplying power to the 42 V loads and charging the 36 V battery (rectifier), and supplying power to the starter motor during starting (inverter). A demonstration inverter for a 42 V ISA system has been realized. The inverter FETs were shown to operate constantly at 416 A peak at 1.5 kHz. Measurements are in reasonable agreement with an analytical model. The model was used to predict operation at higher frequencies. It is concluded that operation at higher frequencies will require a liquid cooled heat sink. Feasibility to design an inverter/rectifier for a 10 kW, 42 V ISA system, with high power discrete semiconductor components, has been demonstrated. With careful layout and design, this could be a viable alternative to a module solution with the same number of FETs per switch.
A 42V inverter/rectifier for ISA using discrete semiconductor components
Eine 42-V-Leistungselektronik für einen Integrierten Starter-Generator, aufgebaut mit diskreten Halbleiter-Baulelementen
2001
5 Seiten, 5 Bilder, 2 Tabellen, 4 Quellen
Conference paper
English
A 42V Inverter/Rectifier for ISA using Discrete Semiconductor Components
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