SEMICONDUCTOR DRIVE DEVICE AND POWER CONVERSION DEVICE

WIPO Patent Application WO/2011/018835

A1

Provided is a small-size and high-performance semiconductor drive device for electric power which can assure a high reliability against a noise or trouble in a circuit.  Provided is also a small-size power conversion device having a high reliability realized by using the semiconductor drive device. In an instruction signal drive unit (1), a continuous pulse generation unit (6) generates a continuous pulse voltage (Va) of a predetermined cycle corresponding to the ON period of a drive instruction IN, and a drive unit (7) applies a pulse voltage to the transmission side of an insulating communication unit (2) in accordance with the pulse voltage (Va).  In an output unit (3), a determination unit (8) outputs a pulse voltage (Vb) in accordance with the pulse voltage generated at the reception side of the insulating communication unit (2), and an output pulse generation unit (9) outputs one pulse of a drive voltage (Vout) having a constant width longer than the period of the pulse voltage (Va) in accordance with the inputted pulse voltage (Vb).  The drive voltage (Vout) turns ON the gate of a semiconductor switching element (Q1).

SAKANO JUNICHI (JP)
YUKUTAKE SEIGO (JP)
HIRAO TAKASHI (JP)
KONO YASUHIKO (JP)

PCT/JP2009/064136

February 17, 2011

August 10, 2009

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HITACHI LTD (JP)
SAKANO JUNICHI (JP)
YUKUTAKE SEIGO (JP)
HIRAO TAKASHI (JP)
KONO YASUHIKO (JP)

H02M7/48; H02M1/08

JP2006074372A

2006-03-16

ISONO Michizo (JP)
Michizo Isono (JP)

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