Combined power filter with both active and passive parts
Title：
Combined power filter with both active and passive parts
Application Number：
 00109624
Application Date：
 2000/06/16
Announcement Date：
 2000/11/29
Pub. Date：
Publication Number：
 1274977
Announcement Number：
 1086256
Grant Date：
Granted Pub. Date：
 2002-6-12
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H02J 3/01
Applicant(s)：
 Qinghua Univ.
Inventor(s)：
 Zhu Dongqi, Jiang Xinjian, Deng Zhanfeng
Key Words：
 Combined, power filter, active, passive parts
Abstract：
 The combined power filter consists of an active filter, a passive filter, a transformer and a control circuit, and its control circuit includes a current sensor, a harmonic wave detector cirucit, a regulator, a pulse width modulation and control circuit and a driver circuit. The current sensor converts the current data of power network into voltage signal to the harmonic wave detector to obtain harmonic current signal, the harmonic control signal is fed to the regulator to obtain the current controlling command signal, and the output of the active filter is controlled according to the command signal to realize filtering. The device of the present invention is low in cost, economic and practical.
Claim：
Priority：
PCT：
LegalStatus：

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