发明名称 |
Method and apparatus for detecting current delay angle from motor terminal voltage |
摘要 |
A method and apparatus to be used with an inverter based motor controller for determining current phase angles for the current on a single phase of a three phase AC motor from an inverter generated high frequency phase voltage sequence. The invention detects turn on delay periods and compares phase voltages during consecutive turn on delay periods to determine phase current zero crossing times which can be used along with phase voltage zero crossing times to derive current phase angle information.
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申请公布号 |
US5627447(A) |
申请公布日期 |
1997.05.06 |
申请号 |
US19950536728 |
申请日期 |
1995.09.29 |
申请人 |
ALLEN-BRADLEY COMPANY, INC. |
发明人 |
UNSWORTH, PETER J.;TAO, JINGHAN |
分类号 |
H02P23/00;(IPC1-7):H02P5/40 |
主分类号 |
H02P23/00 |
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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