发明授权
- 专利标题： Automatic power factor correction using power measurement chip
- 专利标题（中）： 使用功率测量芯片自动功率因数校正
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申请号： US10789253申请日： 2004-02-27
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公开(公告)号： US07002321B2公开(公告)日： 2006-02-21
- 发明人: William D. McDaniel , Gail A. McDaniel , Timothy J. McDaniel
- 申请人： William D. McDaniel , Gail A. McDaniel , Timothy J. McDaniel
- 代理机构： Shughart Thomson & Kilroy, P.C
- 代理商 Dennis A. Crawford; Marcia J. Rodgers
- 主分类号： G05F1/70
- IPC分类号： G05F1/70
摘要：
An automatic power factor correction system, for an electrical power installation drawing varying levels of reactive power, measures an electrical parameter of the power drawn by a load of a power installation using a power measurement integrated circuit, the parameter being capable of indicating a level of reactive power drawn by the load, and couples a combination of capacitors to the power line to compensate for the level of reactive power indicated by the electrical parameter measured. In a first embodiment of the invention, the combination of power factor compensating capacitors is calculated from a signed value of reactive power drawn by the load. In a second embodiment, the compensating capacitor combination is calculated from a value of power factor for the load which is calculated from a ratio of an active power value to an apparent power value.
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