Self-propelled working machine with electrical drive system and processes for operating the same
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United States of America Patent
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Feb 3, 2015
Grant Date -
Oct 13, 2011
app pub date -
Apr 12, 2011
filing date -
Apr 12, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a self-propelled working machine, especially in the form of a surface milling machine, such as asphalt-milling machine or snow-milling machine comprising a main operating unit and/or a drive unit, which is operable in a steady-state or near steady-state operating status and is drivable by a drive device comprising at least an electrical motor, the electrical motor being associated with a start-up including a frequency converter for the limitation of starting current. The invention also relates to a process for operating such a self-propelled working machine. According to the invention an operating circuit for steady-state operation is provided, comprising a jumper for bridging the frequency converter following starting or reaching steady-state operational status. Optionally, the jumper is switchable to activate or inactivate the frequency converter of the start-up circuit, respectively.
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