To obtain a failure detector of simple construction capable of reliably detecting any failure in a drive control system for controlling driving of an alternating-current rotary machine by a power converter.
The failure detector detects any failure in a power converter 1 that includes a plurality of switching elements 8a to 8f and converts direct-current voltage into three-phase alternating-current voltage; an alternating-current rotary machine 2; and connecting means 3a to 3c that connect together the power converter 1 and the alternating-current rotary machine 2. The detector is provided with: current detecting means 4a, 4b provided in the connecting means 3b, 3c; a switching command generating means 5 that outputs a switching command signal to the switching elements 8a to 8f to apply voltage to all the three phases of the alternating-current rotary machine 2 and generates such a specific switching command signal that of the line-to-line voltages of three-phase voltage, two line-to-line voltages have an identical sign and the remaining one line-to-line voltage is 0; and a failure detecting means 6 that detects any failure based on the currents detected by the current detecting means 4a, 4b when the specific switching command signal is outputted.
| JPS5532494 | CONVERTER CONTROLLER |
| JP6314639 | Power converter |
| JP2006067732 | ELECTRIC VEHICLE CONTROLLING DEVICE |
HATANAKA KEITA
KANEHARA YOSHIHIKO
| JPH07239359A | 1995-09-12 | |||
| JPH05328739A | 1993-12-10 | |||
| JP2006246649A | 2006-09-14 | |||
| JP2005181167A | 2005-07-07 | |||
| JP2006054943A | 2006-02-23 | |||
| JP2006296168A | 2006-10-26 | |||
| JP2002034264A | 2002-01-31 | |||
| JP2003324928A | 2003-11-14 | |||
| JPH08107699A | 1996-04-23 | |||
| JPH10191651A | 1998-07-21 |
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka
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