Power transformer active noise reduction system

The utility model discloses a power transformer active noise reduction system, include: the microphone, the microphone is connected with leading power amplifier, leading power amplifier and data collection card's collection path connection, data collection card carries out sending to the contro...

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Bibliographic Details
Main Authors LI PENG, LI SHANGZHEN, WANG XIAOJUN, ZHANG ZEHUI, NI GUANGKUI, PEI XIUGAO, ZHAO QUANFU, HAN TAO, ZHAO BAOGUANG, LIANG YUANBIN
Format Patent
LanguageEnglish
Published 11.11.2015
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:The utility model discloses a power transformer active noise reduction system, include: the microphone, the microphone is connected with leading power amplifier, leading power amplifier and data collection card's collection path connection, data collection card carries out sending to the controller to data after AD changes, the output of controller passes through data collection card's the rearmounted power amplifier of output channel connection, the audio amplifier is connected to rearmounted power amplifier's output. Gather elementary noise through the reference signal microphone, in sending the signal to controller after power amplification and the AD conversion, the controller is accomplished noise signal's analysis processes, data storage and is produced control signal, passes through output signal the DA conversion and enlarge the back by audio amplifier output, can gather the secondary sound source that the audio amplifier produced through the error signal microphone to the controller is fed back to, the noise reduction effect well can be reached through feedback control like this.
Bibliography:Application Number: CN20152443497U