ELECTRIC MOTOR DRIVE DEVICE - MITSUBISHI ELECTRIC CORP

Title:

ELECTRIC MOTOR DRIVE DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/217036

Kind Code:

A1

Abstract:

An electric motor drive device (100) is provided with a smoothing capacitor (4) and an inverter (1), and also provided with an overvoltage protection unit (6) for protecting the smoothing capacitor (4) from overvoltage, and a phase short-circuit control unit (12). The overvoltage protection unit (6) is provided with: a discharge circuit (20) in which a discharge resistor (7) and an IGBT (9) are connected in series; and a first determination circuit (21) for determining with a determination delay that a smoothing capacitor voltage exceeds a first set voltage and turning on the IGBT (9). The phase short-circuit control unit (12) is provided with a second determination circuit (13) provided in a control device (5) for drive-controlling the inverter (1) and determining with a determination time longer than the determination delay of the first determination circuit (21) that the smoothing capacitor voltage exceeds a second set voltage lower than the first set voltage, thereby performing a phase short-circuit control on the inverter (1).

Inventors:

ONDA KOHEI (JP)
TAKESHIMA YOSHIHIRO (JP)
IWABUKI HIROYASU (JP)
IEZAWA MASAHIRO (JP)
SHINOHARA RYO (JP)
SUGITA HIDEKI (JP)

Application Number:

PCT/JP2017/009162

Publication Date:

December 21, 2017

Filing Date:

March 08, 2017

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H02M7/48

Foreign References:

JP2015050825A	2015-03-16
JP2014135827A	2014-07-24
JP2012196143A	2012-10-11
JP2010110099A	2010-05-13

Other References: