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Patent History
- ApplicationCN 20021042057 2002-08-24
- PublicationCN 1201469 2005-05-11
Patent Family
- CN 1407702 (A) 2003-04-02
- CN 1201469 (C) 2005-05-11
- CN 1871761 (A) 2006-11-29
- EP 1289108 (A2) 2003-03-05
- EP 1658669 (A1) 2006-05-24
- HK 1054628 (A1) 2005-12-23
- US 6490181 (B1) 2002-12-03
- US 2004032753 (A1) 2004-02-19
- US 6879500 (B2) 2005-04-12
- US 2003231515 (A1) 2003-12-18
- WO 2005018077 (A1) 2005-02-24
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- Appears in Collections:
published patent: Device for reducing noise current in power adaptor
Title | Device for reducing noise current in power adaptor |
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Priority Date | 2001-08-24 US 09/939068 |
Inventors | |
Issue Date | 2005 |
Citation | China Published Patent Application CN 1201469. Beijing, PRC: State Intellectual Property Office (SIPO) of the P.R.C., 2005 How to Cite? |
Abstract | An apparatus for reducing electromagnetic interference due to common mode current in power converters is disclosed. Common mode current flowing through high parasitic capacitance on the load side typically contributes significantly to the electromagnetic interference. In order to reduce the electromagnetic interference the common mode current is reduced by reducing the voltage driving a current through the high parasitic capacitance. A counter-acting voltage source produces a voltage out of phase with the voltage driving the common mode current. Such a counter-acting voltage is obtained with the aid of a winding coupled to the magnetic component in the power converter or by one or more active components. The counter-acting voltage source is connected in series with a capacitance element connected between the input and output sides of the converter-input terminal and output terminal when electrical isolation between the input and the output is desired. |
Persistent Identifier | http://hdl.handle.net/10722/176647 |
DC Field | Value | Language |
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dc.date.accessioned | 2012-11-30T08:38:18Z | - |
dc.date.available | 2012-11-30T08:38:18Z | - |
dc.date.issued | 2005 | - |
dc.identifier.citation | China Published Patent Application CN 1201469. Beijing, PRC: State Intellectual Property Office (SIPO) of the P.R.C., 2005 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/176647 | - |
dc.description.abstract | An apparatus for reducing electromagnetic interference due to common mode current in power converters is disclosed. Common mode current flowing through high parasitic capacitance on the load side typically contributes significantly to the electromagnetic interference. In order to reduce the electromagnetic interference the common mode current is reduced by reducing the voltage driving a current through the high parasitic capacitance. A counter-acting voltage source produces a voltage out of phase with the voltage driving the common mode current. Such a counter-acting voltage is obtained with the aid of a winding coupled to the magnetic component in the power converter or by one or more active components. The counter-acting voltage source is connected in series with a capacitance element connected between the input and output sides of the converter-input terminal and output terminal when electrical isolation between the input and the output is desired. | en_HK |
dc.title | Device for reducing noise current in power adaptor | en_HK |
dc.type | Patent | en_US |
dc.description.nature | published_or_final_version | - |
dc.contributor.inventor | Liao Zhubang | en_HK |
dc.contributor.inventor | Pang Yijie | en_HK |
dc.contributor.inventor | Pong MH | en_HK |
patents.identifier.application | CN 20021042057 | en_HK |
patents.description.assignee | HONGKONG UNIV [CN] | en_HK |
patents.description.country | China, PRC | en_HK |
patents.date.publication | 2005-05-11 | en_HK |
patents.identifier.hkutechid | EEE-2001-00050 | - |
patents.date.application | 2002-08-24 | en_HK |
patents.date.priority | 2001-08-24 US 09/939068 | en_HK |
patents.description.cc | CN | en_HK |
patents.identifier.publication | CN 1201469 | en_HK |
patents.relation.family | CN 1407702 (A) 2003-04-02 | en_HK |
patents.relation.family | CN 1201469 (C) 2005-05-11 | en_HK |
patents.relation.family | CN 1871761 (A) 2006-11-29 | en_HK |
patents.relation.family | EP 1289108 (A2) 2003-03-05 | en_HK |
patents.relation.family | EP 1658669 (A1) 2006-05-24 | en_HK |
patents.relation.family | HK 1054628 (A1) 2005-12-23 | en_HK |
patents.relation.family | US 6490181 (B1) 2002-12-03 | en_HK |
patents.relation.family | US 2004032753 (A1) 2004-02-19 | en_HK |
patents.relation.family | US 6879500 (B2) 2005-04-12 | en_HK |
patents.relation.family | US 2003231515 (A1) 2003-12-18 | en_HK |
patents.relation.family | WO 2005018077 (A1) 2005-02-24 | en_HK |
patents.description.kind | C | en_HK |
patents.type | Patent_published | en_HK |