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Title:
CONTROL DEVICE AND CONTROL METHOD FOR POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/168524
Kind Code:
A1
Abstract:
Provided is a control device for a power conversion device, the control device being capable of preventing an erroneous operation due to a high voltage applied to an upper-phase-side FET and a resulting short circuit of arms in upper and lower phases. A fuse 51, a main contactor 52, and an electrolytic capacitor C21 are connected in series between positive and negative electrode terminals P and N of a battery 50. An inverter 54 in which upper-phase-side FETs (54U, 54V, 54W) and lower-phase-side FETs (54X, 54Y, 54Z) are bridge-connected is connected between positive and negative electrode terminals of the electrolytic capacitor C21. A resistor R1 for pre-charging the electrolytic capacitor C21 is connected in parallel with the main contactor 52. The resistance value of the resistor R1 is set so as to obtain such a charging voltage value of the electrolytic capacitor C21 that a gate-source voltage can be suppressed to a voltage that inhibits the upper-phase-side FETs from being turned on when the upper-phase-side FETs are controlled to an off state and the lower-phase-side FETs are controlled to an on state during a pre-charging period after the battery 50 is connected until a key switch is turned on.

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Inventors:
SUZUKI TETSUJI (JP)
KUMAMOTO YOSHIHITO (JP)
WAKAMATSU TAKANORI (JP)
Application Number:
PCT/JP2022/000247
Publication Date:
August 11, 2022
Filing Date:
January 06, 2022
Export Citation:
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Assignee:
MEIDENSHA ELECTRIC MFG CO LTD (JP)
International Classes:
H02M1/08; H02M7/48
Foreign References:
JP2005006467A2005-01-06
JP2006320176A2006-11-24
JP2010158117A2010-07-15
JP2019033621A2019-02-28
JP2010200554A2010-09-09
Other References:
See also references of EP 4290751A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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