| 摘要 |
An electronic device which, fed from a sinusoidal or randomly variable network, makes it possible to supply the input of a converter with which it is equipped with a DC voltage, a load connected at the output also being fed with a DC voltage envelope, whereas the power factor of the current taken from the mains is kept at unitary value and said current is the image of the voltage which produces it. The high frequency output circuit of the converter loads the series circuit formed by the load 13 associated with an impedance 16. The voltage developed across the terminals of the impedance 16 is rectified by a rectifier bridge 15 mounted in series with a mains rectifier bridge 10 so that these voltages, added to the input of the converter 12, affect the envelope of a DC voltage, this also resulting in supplying a DC voltage envelope to receiver the load 13. The current taken from the mains has a unitary power factor and is proportional to the input voltage. This device is applicable to the majority of electronic converters used as ballasts, transformers, stabilized power supplies, and so on.
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