Title:
LOAD DRIVE DEVICE AND VEHICLE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2008/007723
Kind Code:
A1
Abstract:
A surge voltage generated by a switching operation of an IGBT element and a voltage
fluctuation generated by an equivalent DC resistor of capacitor (C2) are superimposed
on an input voltage Vm of an inverter (14). The equivalent DC resistor has such
a temperature dependency that the resistance value is increased as the capacitor
temperature Tc is lowered. Moreover, the IGBT element has such a temperature
dependency that the voltage resistance of the element is lowered as the inverter
temperature Tiv is lowered.When the capacitor temperature Tc is lower than a
predetermined threshold value, a control device (30) reducers the upper limit
of the input voltage Vm by an amount corresponding to the voltage fluctuation
from the upper limit value at a high temperature. Thus, the control device (30)
controls a target voltage of a boosting converter (12) so that the output voltage
will not exceed its upper limit value. As a result, it is possible to assure the
allowance range of the surge voltage.
Inventors:
HAMATANI TAKASHI (JP)
Application Number:
PCT/JP2007/063873
Publication Date:
January 17, 2008
Filing Date:
July 05, 2007
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
HAMATANI TAKASHI (JP)
HAMATANI TAKASHI (JP)
International Classes:
H02M3/155; B60L9/18; H02M7/757; H02P6/12; H03K17/14
Foreign References:
| JP2005198406A | 2005-07-21 | |||
| JP2005045927A | 2005-02-17 | |||
| JP2006067692A | 2006-03-09 | |||
| JP2005354763A | 2005-12-22 | |||
| JP2006006073A | 2006-01-05 | |||
| JP2005348510A | 2005-12-15 | |||
| JP2005312160A | 2005-11-04 |
Attorney, Agent or Firm:
FUKAMI, Hisao et al. (Nakanoshima Central Tower 22nd Floor, 2-7, Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, JP)
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