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Loss minimization of electric drive systems using a DC/DC converter and an optimized battery voltage in automotive applications

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3 Author(s)
Tenner, S. ; Inst. of Electr. Power Eng., Dresden Univ. of Technol., Dresden, Germany ; Gunther, S. ; Hofmann, W.

Voltage source inverters generally feed the traction motor from a battery in automotive applications. By implementing a DC/DC converter between battery and inverter, the DC-link voltage is adjustable. This paper discusses the benefits of the variable DC-link voltage as an additional degree of freedom for a loss minimized control of electric drives in battery supplied vehicles. Inverter systems with and without DC/DC converter are compared and operating areas of improved efficiency are identified. Energy saving potentials resulting from an optimized battery voltage are discussed for different driving cycles.

Published in:

Vehicle Power and Propulsion Conference (VPPC), 2011 IEEE

Date of Conference:

6-9 Sept. 2011