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Title:
METHOD AND APPARATUS FOR CONTROL OF AN AC ELECTRIC MOTOR WITH FIELD WEAKENING
Document Type and Number:
WIPO Patent Application WO/2009/138821
Kind Code:
A3
Abstract:
A method and apparatus for control of an alternating current electric motor with field weakening, including setting a required operating point (Ud REQ) for a motor field voltage component as a function of a difference between actual (ld FBCK) and required (ld REQ) motor field current components, and setting a required operating point (Uq REQ) for a motor torque voltage component as a function of a difference between actual (lq FBCK) and required (|q LIM_REQ) motor torque current components. The method also includes setting a field weakening constituent (ld REQ_FW) for the required operating point (Ud REQ) for the motor field voltage component as a function of a difference between a required operating point (Uq REQ) and an available value (Uq LIM) of the motor torque voltage component and as a function of a difference between actual (lq FBCK) and required (|q LIM_REQ) motor torque current components.

Inventors:
FILKA ROMAN (CZ)
BALAZOVIC PETER (CZ)
Application Number:
PCT/IB2008/051933
Publication Date:
August 26, 2010
Filing Date:
May 16, 2008
Export Citation:
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Assignee:
FREESCALE SEMICONDUCTOR INC (US)
FILKA ROMAN (CZ)
BALAZOVIC PETER (CZ)
International Classes:
H02P6/00; H02P21/00
Foreign References:
US20040036434A12004-02-26
US6288515B12001-09-11
US20070222406A12007-09-27
EP1672780A22006-06-21
JPH0946809A1997-02-14
US5739664A1998-04-14
EP0877474A21998-11-11
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