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Patent Searching and Data


Title:
ELECTRIC VEHICLE POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/064846
Kind Code:
A1
Abstract:
An electric vehicle power conversion device comprises: a power converter (2) for driving an induction machine (1) according to arbitrary dq-axis voltage commands (Vd*, Vq*); and a control unit (40) for controlling the power converter (2) according to a powering command (P) and a brake command (B) which are input from the outside. The control unit (40) includes: a dq/three-phase conversion unit (10) for converting phase current information (iu, iv, iw) detected in the induction machine (1) to dq-axis current detection values (id, iq) on an orthogonal rotating coordinate; a speed determination unit (4) for calculating the dq-axis voltage commands (Vd*, Vq*) for the power converter (2) on the basis of the powering command (P), brake command (B), and dq-axis current detection values (id, iq) and determining that the speed of the induction machine (1) is zero; and a resistance calculation unit (5) for, when the brake command (B) is changed to the powering command (P) and the speed determination unit (4) determines that the speed of the induction machine (1) is zero, calculating the resistance value of the induction machine (1) on the basis of the powering command (P), d-axis current detection value (id), and d-axis voltage command (Vd*).

Inventors:
KONO MASAKI (JP)
HATANAKA KEITA (JP)
Application Number:
JP2009/069854
Publication Date:
June 03, 2011
Filing Date:
November 25, 2009
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
KONO MASAKI (JP)
HATANAKA KEITA (JP)
International Classes:
H02P27/04; B60L7/14; B60L9/18; H02P21/00; H02P21/14; H02P21/16; H02P21/18; H02P21/22; H02P21/24; H02P23/07; H02P23/14; H02P27/06
Foreign References:
JP2007189897A2007-07-26
JPH05297079A1993-11-12
JPH11262102A1999-09-24
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
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