Title:
VOLTAGE TYPE MULTILEVEL CONVERTER
Document Type and Number:
Japanese Patent JP2015042044
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a voltage type multilevel converter that performs a protection process against a short circuit fault without requiring a higher communication speed between a common controller and a controller in a phase module and in a simple configuration.SOLUTION: Flying capacitors C3, C4 disposed for each phase and charged with a different voltage from capacitors C1, C2 are provided with voltage change rate detection sections 2a, 2b for detecting rates of change in voltage across the flying capacitors C3, C4, and if the rates of change in voltage across the flying capacitors C3, C4 exceed a threshold, a short circuit is detected. A short circuit anomaly signal is then transmitted to a controller section 6 of each phase, and a drive circuit 7 for each switching element interrupts a gate signal.
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Inventors:
KONDO TAKESHI
Application Number:
JP2013170939A
Publication Date:
March 02, 2015
Filing Date:
August 21, 2013
Export Citation:
Assignee:
MEIDENSHA ELECTRIC MFG CO LTD
International Classes:
H02M7/487; H02M7/48
Domestic Patent References:
| JP2013146117A | 2013-07-25 | |||
| JP2008154420A | 2008-07-03 | |||
| JP2007184999A | 2007-07-19 | |||
| JPH09205779A | 1997-08-05 | |||
| JPH07231674A | 1995-08-29 | |||
| JP2009159259A | 2009-07-16 | |||
| JP2004112916A | 2004-04-08 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Hidehisa Uzawa
Hashimoto 剛
Hidehisa Uzawa
Hashimoto 剛