发明名称 |
System for detecting incorrect phase rotation |
摘要 |
A system for automatically detecting whether a power converter or inverter is correctly connected to a three-phase AC power source consisting of first, second, and third phases, the system comprising: a zero-crossing comparator (1) for determining whether the phase of the first-phase voltage (current) is in a positive half cycle or a negative half cycle and generating a first discrimination signal (CU); a zero-crossing comparator (2, 3) for determining whether the phase of the second- or third-phase voltages (current) is in a positive half cycle or a negative half cycle and generating a second discrimination signal (CV or CW); and a D-type flip-flop (5) which detects, in response to the first discrimination signal, that the second discrimination signal is in a predetermined half cycle.
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申请公布号 |
US5680040(A) |
申请公布日期 |
1997.10.21 |
申请号 |
US19960598114 |
申请日期 |
1996.02.07 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
KAWAI, JYOJI;YAMAMOTO, YUUSHIN |
分类号 |
G01R29/18;H02M1/084;(IPC1-7):G01R25/00 |
主分类号 |
G01R29/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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