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Title:
DISCHARGING CONTROL DEVICE FOR ELECTRIC POWER CONVERSION SYSTEM
Document Type and Number:
Japanese Patent JP2011188712
Kind Code:
A
Abstract:

To solve a problem wherein it cannot be guaranteed that discharge control in an abnormality to discharge a capacitor 16 by shorting both electrodes of the capacitor 16 by turning a switching element Swp on the high potential side and a switching element Swn on the low potential side of an inverter IV into an on-state is surely performed when an error actually occurs.

A relay SMR1 is opened to cause a reactive current to flow into a motor generator 10 to reduce the voltage of the capacitor 16 to a voltage Vdg for diagnosis. Thereafter, the discharge command 'dis' in an abnormality is output to perform a discharge control in an abnormality to discharge the capacitor 16 by shorting both electrodes of the capacitor 16 by turning the switching element Swp on the high potential side and the switching element Swn on the low potential side into an on-state. In this case, whether or not the capacitor 16 is discharged is determined based on a detection value of a voltage sensor 32.


Inventors:
Maehara, Tsuneo
Hamanaka, Yoshiyuki
Application Number:
JP2010000054415
Publication Date:
September 22, 2011
Filing Date:
March 11, 2010
Export Citation:
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Assignee:
DENSO CORP
International Classes:
H02M7/48
Domestic Patent References:
JP2000278802A2000-10-06
JP2008061300A2008-03-13
Attorney, Agent or Firm:
山田 強
栗田 恭成
日野 京子
安藤 悟
松田 洋