发明名称 |
THRESHOLD-BASED ZERO-CROSSING DETECTION IN AN ELECTRICAL DIMMER |
摘要 |
Threshold-based zero-crossing detection is provided. A power phase threshold detector detects when absolute value of a voltage level of the electrical power rises above a non-zero voltage threshold and outputs a zero-crossing signal to a controller to indicate occurrence of the zero-crossing. Delaying the zero-crossing signal to the point when the absolute value of the voltage level of the electrical power rises above the non-zero voltage threshold ensures completion of the zero-crossing of the power phase prior to signaling the controller. The controller provides signals to a switching circuit for controlling switching of electrical power to a load based on the zero-crossing indications.
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申请公布号 |
CA2798962(A1) |
申请公布日期 |
2013.06.22 |
申请号 |
CA20122798962 |
申请日期 |
2012.12.14 |
申请人 |
LEVITON MANUFACTURING COMPANY, INC. |
发明人 |
GALLO, MARC |
分类号 |
H02J13/00;H05B37/02 |
主分类号 |
H02J13/00 |
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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