| 摘要 |
The control appts. includes circuitry (7,8,38,40,42) for detecting an electric abnormality at the input and/ or output of the inverter. Also provided is a retry circuit (11) which is operative, when the circuitry detects an abnormality, to interrupt the output of the inverter for a period of several milliseconds and then to allow the inverter output. The retry circuit includes a latch (31) which operates if the circuitry again detects an abnormality within a preset period after interruption has been removed to prevent the retry circuit from again allowing the inverter output.
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