Title:
PROTECTION OF A THREE-PHASE MOTOR IN THE FIELD-WEAKENING RANGE
Document Type and Number:
WIPO Patent Application WO/2013/026669
Kind Code:
A3
Abstract:
The aim is to provide a drive apparatus and a method with which the problems of dangerous braking torques and overvoltages in the field-weakening mode are reduced. Therefore, the invention proposes a drive apparatus for a motor vehicle having a DC voltage source (1) which has a negative terminal (2) and a positive terminal (3), having a three-phase motor (4) of which the windings are combined at a star point (8), and having a converter (9) which is connected to the DC voltage source and to the three-phase motor and serves to convert a direct current into a three-phase alternating current. The star point (8) of the three-phase motor (4) is connected to the negative terminal (2) or the positive terminal (3) of the DC voltage source (1) by way of a switching element (10) so that the star point can be connected to the potential of one of the terminals in the event of a prespecified interruption in the drive apparatus.
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Inventors:
KOEPKEN HANS-GEORG (DE)
Application Number:
PCT/EP2012/065095
Publication Date:
December 27, 2013
Filing Date:
August 02, 2012
Export Citation:
Assignee:
SIEMENS AG (DE)
KOEPKEN HANS-GEORG (DE)
KOEPKEN HANS-GEORG (DE)
International Classes:
H02P29/02; B60L3/00; B60L11/18; H02H7/09
Foreign References:
| EP2048774A2 | 2009-04-15 | |||
| JP2007099066A | 2007-04-19 | |||
| EP2031749A2 | 2009-03-04 |
Attorney, Agent or Firm:
SIEMENS AKTIENGESELLSCHAFT (München, DE)
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