CONVERTER CONTROL DEVICE

WIPO Patent Application WO/2010/150338

A1

Provided is a converter control device which can detect an ON-failure of an auxiliary switch constituting an auxiliary circuit of a soft switching converter so as to prevent an element damage. A current sensor (Si1) for detecting current (L1 current) flowing in a coil (L1) is arranged between a fuel cell (110) and the coil (L1).  A controller successively detects the L1 current by the current sensor (Si1) and checks whether the detected L1 current exceeds an overcurrent threshold value (Ith) stored in a memory (not depicted).  If Yes, the controller determines that a second switching element (S2) has caused ON-failure and stops drive of a converter (250) (such as a U-phase converter) of an auxiliary circuit (22b) having a second switching element (S2), thereby performing a fail-safe operation.

HASEGAWA, Takahiko (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
長谷川　貴彦 (〒71 愛知県豊田市トヨタ町１番地　トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
KITAMURA, Nobuyuki (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
北村　伸之 (〒71 愛知県豊田市トヨタ町１番地　トヨタ自動車株式会社内 Aichi, 〒4718571, JP)

JP2009/061314

December 29, 2010

June 22, 2009

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TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 〒4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町１番地 Aichi, 〒4718571, JP)
HASEGAWA, Takahiko (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)
長谷川　貴彦 (〒71 愛知県豊田市トヨタ町１番地　トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
KITAMURA, Nobuyuki (1 Toyota-cho, Toyota-sh, Aichi 71, 〒4718571, JP)

H02M3/155; B60L11/18

INABA, Yoshiyuki et al. (TMI ASSOCIATES 23rd Floor, Roppongi Hills Mori Tower 6-10-1, Roppongi, Minato-k, Tokyo 23, 〒1066123, JP)

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