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Electroacoustic transduction system and impedance matching control method thereof

An electro-acoustic transduction and impedance matching circuit technology, applied in the field of converters, can solve the problems of low power amplifier output signal efficiency, limited power transmission, low power factor, etc. Adaptive Impedance Matching, Simple Effects

Pending Publication Date: 2021-01-12
HUNAN UNIV
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  • Abstract
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an electro-acoustic transducer system and its impedance matching control method to solve the problems of limited power transmission and To solve the problem of low power factor, realize dynamic self-adaptation and broadband impedance network matching, thereby improving the operating efficiency of the electro-acoustic transducer system
[0008] The present invention connects the impedance matching circuit between the power amplifier and the load, and the load side impedance can be matched with the output impedance of the power amplifier through the impedance matching circuit, which solves the problems of low efficiency and poor precision of the output signal of the power amplifier

Method used

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  • Electroacoustic transduction system and impedance matching control method thereof
  • Electroacoustic transduction system and impedance matching control method thereof
  • Electroacoustic transduction system and impedance matching control method thereof

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Embodiment Construction

[0040] see figure 1 , the digital power amplifier includes a fully controlled power electronic device T a , T b , (MOSFET or IGBT), providing DC voltage V dc The DC capacitance C dc , output inductance L, output capacitor C, four full-control devices form an H-bridge active inverter, and the DC side of the active inverter is connected to the DC capacitor C dc At both ends, the output side of the active inverter is connected in series with the output inductor L and the output capacitor C in sequence, and the load is connected in parallel to both ends of C to obtain the output v of the power amplifier C ; Impedance matching circuit includes 2 anti-parallel thyristors T 1 and T 2 , inductance L PF , capacitance C PF , an antiparallel thyristor with an inductor L PF Series, the series circuit composed of the two is the same as the capacitance C PF Parallel connection, the thyristors are turned on alternately, by changing the firing angle α to change the duration of it...

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Abstract

The invention discloses an electroacoustic transduction system and an impedance matching control method thereof. The electroacoustic transduction system comprises a power amplifier; the power amplifier is connected with the impedance matching circuit; and the impedance matching circuit is connected with a load. The impedance matching circuit comprises two thyristors which are reversely connected in parallel; the two antiparallel thyristors are connected with the inductor in series to form a series branch; and the series branch is connected with the capacitor in parallel. According to the invention, broadband and high-precision dynamic adaptive impedance matching can be realized under different voltage output frequencies and amplitudes of the power amplifier and different load impedance conditions, so the problems of limited power transmission and low power factor caused by inconsistent impedance of the digital power amplifier and the electroacoustic transducer are solved; the dynamic self-adaptive broadband impedance matching is realized, so the operation efficiency of the electroacoustic transduction system can be improved.

Description

technical field [0001] The invention relates to the field of variable current technology, in particular to an electroacoustic transducer system and an impedance matching control method thereof. Background technique [0002] Compared with traditional linear amplifiers, switching power electronic power amplifiers (hereinafter referred to as power amplifiers) have the characteristics of low loss and high power, and have developed rapidly in recent years. Especially in the electro-acoustic transducer system, it is used as a driving power source for electro-acoustic transducers and other equipment, and has the characteristics of high power, wide frequency band, high fidelity, and high efficiency. The electroacoustic transducer system is indispensable in the fields of marine underwater remote communication and underwater active detection. How to ensure the maximum output power and maximum conversion efficiency of the power amplifier and the electroacoustic transducer is of great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/56H03F1/02H03H11/28H04R3/00
CPCH03F1/565H03F1/0205H03H11/28H04R3/00
Inventor 王雷徐千鸣罗安何志兴
Owner HUNAN UNIV
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