发明名称 |
Multilevel phase unbalance compressor motor protection system |
摘要 |
A method of protecting the compressor motor of a refrigeration system using a multiphase AC power source. The method comprises the steps of monitoring each phase of the power supply to the compressor motor; calculating the average phase for the phases of the AC power supply; determining a maximum phase unbalance deviation from the average phase; determining if a first level of phase unbalance protection is active; setting a system protection level as the first level of phase unbalance protection if the first level is active; setting the system protection level as a second higher level of phase unbalance protection if the first level is not active; and initiating a compressor motor shutdown if the system protection level is exceeded by the maximum unbalanced phase deviation.
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申请公布号 |
US5058031(A) |
申请公布日期 |
1991.10.15 |
申请号 |
US19900502355 |
申请日期 |
1990.03.30 |
申请人 |
AMERICAN STANDARD INC. |
发明人 |
SWANSON, ROBERT M.;RENTMEESTER, PAUL C.;FOYE, DAVID M. |
分类号 |
H02H7/09 |
主分类号 |
H02H7/09 |
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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