Title:
能動コモンモードEMIフィルタ
Document Type and Number:
Japanese Patent JP4236634
Kind Code:
B2
Abstract:
An active EMI filter for reducing common mode noise current in a circuits, comprising: a transistor stage having two transistors coupled in series, a current sensor for sensing the common mode noise current, the current sensor having an output driving the transistor stage, whereby each of the transistors is driven in response to the common mode noise current, a capacitor coupling the transistor stage and the ground return line, the capacitor providing a cancellation current to cancel the common mode noise current, the current sensor comprising a current transformer having a primary coupled with the circuit having the common mode noise. The current sensor and the transistor stage may be coupled in a feed forward arrangement wherein the transistor stage and the current sensor have an amplitude gain of approximately unity; or in a feedback arrangement wherein the transistor stage and current sensor provide high gain.
More Like This:
| JP4231769 | Filter device and power conversion device to which the filter device is connected |
| WO/2022/235868 | POWER FILTRATION SYSTEM |
| JP2019100579 | AIR CONDITIONER |
Inventors:
Toshio Takahashi
Brian perry
Brian perry
Application Number:
JP2004502448A
Publication Date:
March 11, 2009
Filing Date:
April 29, 2003
Export Citation:
Assignee:
INTERNATIONAL RECTIFIER CORPORATION
International Classes:
H02M1/12; H02M1/14; H02M1/15; H02M1/44; H02M5/458; H03H11/04
Domestic Patent References:
| JP2000184737A | ||||
| JP11122910A | ||||
| JP10094244A | ||||
| JP200210650A |
Attorney, Agent or Firm:
Soichi Takezawa
Noritsugu Nakama
Noritsugu Nakama
Previous Patent: サブダクトおよびケーブル配設の方法およびシステム
Next Patent: IDENTIFICATION NAME RETRIEVAL PROCESSING SYSTEM
Next Patent: IDENTIFICATION NAME RETRIEVAL PROCESSING SYSTEM