发明名称 |
SYSTEMS, METHODS, AND DEVICES FOR DEMODULATING INDUCTION MOTOR INSTANTANEOUS ROTOR SLOT HARMONIC FREQUENCY |
摘要 |
A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator. |
申请公布号 |
CA2814360(C) |
申请公布日期 |
2016.06.14 |
申请号 |
CA20112814360 |
申请日期 |
2011.10.15 |
申请人 |
SCHNEIDER ELECTRIC USA, INC. |
发明人 |
GAO, ZHI;TURNER, LARRY A.;LEPRETTRE, BENOIT;COLBY, ROY S. |
分类号 |
H02P23/14;H02P25/02 |
主分类号 |
H02P23/14 |
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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