传感技术学报
傳感技術學報
전감기술학보
Journal of Transduction Technology
2014年
8期
1065-1069
,共5页
陈士广%陈华宾%程恩%袁飞
陳士廣%陳華賓%程恩%袁飛
진사엄%진화빈%정은%원비
换能器%D类功放%匹配电路%谐振
換能器%D類功放%匹配電路%諧振
환능기%D류공방%필배전로%해진
transducer%D-class power amplifier%matching circuit%resonant
是针对20 k~30 k频段的水声换能器设计D类功率放大器和匹配电路,PWM电路相对线性电路具有效率高、尺寸小等优点,所以D类功放一般选用PWM调制,D类功放由三角波发生器、比较器、功率管以及保护模块组成,实现高效率、低失真的功率放大。 D类功放的输出一般都要通过一个低通滤波器来滤除高频信号,来还原低频信号。由于水声换能器是容性负载,会产生很大的无功功率,因此需要设计匹配电路,匹配包括调谐和阻抗匹配。匹配电路的加入能大大减少水声换能器的无功功率,进而提高功放的效率,使水声换能器在工作频段内能稳定工作。
是針對20 k~30 k頻段的水聲換能器設計D類功率放大器和匹配電路,PWM電路相對線性電路具有效率高、呎吋小等優點,所以D類功放一般選用PWM調製,D類功放由三角波髮生器、比較器、功率管以及保護模塊組成,實現高效率、低失真的功率放大。 D類功放的輸齣一般都要通過一箇低通濾波器來濾除高頻信號,來還原低頻信號。由于水聲換能器是容性負載,會產生很大的無功功率,因此需要設計匹配電路,匹配包括調諧和阻抗匹配。匹配電路的加入能大大減少水聲換能器的無功功率,進而提高功放的效率,使水聲換能器在工作頻段內能穩定工作。
시침대20 k~30 k빈단적수성환능기설계D류공솔방대기화필배전로,PWM전로상대선성전로구유효솔고、척촌소등우점,소이D류공방일반선용PWM조제,D류공방유삼각파발생기、비교기、공솔관이급보호모괴조성,실현고효솔、저실진적공솔방대。 D류공방적수출일반도요통과일개저통려파기래려제고빈신호,래환원저빈신호。유우수성환능기시용성부재,회산생흔대적무공공솔,인차수요설계필배전로,필배포괄조해화조항필배。필배전로적가입능대대감소수성환능기적무공공솔,진이제고공방적효솔,사수성환능기재공작빈단내능은정공작。
The article is about D-class power amplifier and matching circuit designed for 20~30 k spectrum underwater sound transducer.PWM circuit is more efficient and smaller than linear circuit,so we choose PWM modulation in D-class power amplifier.D-class power amplifier is composed of triangle wave generator,comparator,power tube and protection module,realizes high efficiency and low distortion power amplification.The output of D-class power amplifier typically fil-ters out high-frequency signals through a low-pass filter,restores low-frequency signals. Underwater sound transducer is capacitive load,and it will produce large reactive power.You should design the matching circuit,including tuning and im-pedance matching.The matching circuit greatly reduces reactive power of underwater sound transducer,and enhances effi-ciency of power amplifier,ensuring underwater sound transducer in good working condition.