Title:
ELECTRIC DRIVE SOURCE FOR A MOTOR-DRIVE AND VEHICLE WITH SAID DRIVE SOURCE
Document Type and Number:
WIPO Patent Application WO2004014685
Kind Code:
A3
Abstract:
An electric drive source for an electric motor drive, e.g. a stacker truck, containing a parallel circuit consisting of a fuel cell unit (2), an ultracapacitor unit (4) and an electric drive (M1, M2). The ultracapacitor unit is operated by means of a pre-charge circuit (6) having a limited current intensity for reception purposes when the ultracapacitor unit (4) is initially operated. The pre-charge circuit (6) contains a PWM control element and a MOSFET (T1). Once the ultracapacitor unit (4) is charged to a specific voltage, a main protection device (SW) is closed and the pre-charge circuit (6) is deactivated. It is possible to dispense with DC-DC converters used in prior art provided the operating parameters are kept within respective limits,.e.g. the clamping voltage available at the fuel cell unit and ultracapacitor unit (4), the energy content of the ultracapacitor unit and the power discharged by the drive.
Inventors:
WALLNER STEFAN (DE)
HINZ MATTHIAS (DE)
HINZ MATTHIAS (DE)
Application Number:
PCT/EP2003/008545
Publication Date:
March 18, 2004
Filing Date:
August 01, 2003
Export Citation:
Assignee:
PROTON MOTOR FUEL CELL GMBH (DE)
WALLNER STEFAN (DE)
HINZ MATTHIAS (DE)
WALLNER STEFAN (DE)
HINZ MATTHIAS (DE)
International Classes:
B60L11/18; B60L15/20; H02J7/34; (IPC1-7): B60L11/18; B60L15/20; H02J7/34
Foreign References:
| US20010053465A1 | 2001-12-20 | |||
| US20020177021A1 | 2002-11-28 | |||
| US6344985B1 | 2002-02-05 | |||
| US5710699A | 1998-01-20 | |||
| US6323626B1 | 2001-11-27 |
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