Title:
RECTIFYING CIRCUIT DEVICE
Document Type and Number:
Japanese Patent JPS5694970
Kind Code:
A
Abstract:
To provide a power rectifier for connection to an a-c power network which has low ripple at the d-c output, and low harmonic content at the a-c side, particularly for feeding a d-c - a-c inverter frequency generator providing output in the audio or low supersonic range for supply of gas discharge or fluorescent lamps, a wave-shaping network is connected to the a-c side of a standard bridge rectifier unit such that the a-c power applied to the rectifier is of approximately trapezoidal or rectangular or square-wave shape; a suitable network is the combination of an inductance (D) and a storage capacitor(C1) in a T-network or in a series resonant circuit, in which the quadrature VA of the choke (D), at network frequency, is about 60% of the power to be supplied by the rectifier, with a capacitor (C1) in a T-network configuration of such value that the resonant frequency of the L/C circuit is about 2.2 to 2.6 times network frequency or equal to network frequency, when in a series resonant circuit. Splitting the inductance (D) into two winding portions, one in each one of the supply lines substantially reduces radio interference from a connected gas discharge lamp.
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Inventors:
FURIITOYOOFU BURUUMU
Application Number:
JP17331580A
Publication Date:
July 31, 1981
Filing Date:
December 10, 1980
Export Citation:
Assignee:
PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH
International Classes:
H02M1/00; H02M7/06; H02M1/12; H02M1/14; H02M1/42; (IPC1-7): H02M7/06
Domestic Patent References:
| JPS539372A | 1978-01-27 | |||
| JPS5112630A | 1976-01-31 |