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A power amplifier power supply voltage control method and system

A voltage control method and technology for a control system, applied in control/regulation systems, improving amplifiers to reduce temperature/power supply voltage changes, electrical components, etc., can solve problems such as large bus voltage fluctuations, reduce bus voltage fluctuations, reduce Small energy storage capacitor, the effect of improving performance

Active Publication Date: 2021-06-29
宜宾听点科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of large fluctuations in the bus voltage of the input power amplifier in the prior art, and to provide a method and system for controlling the power supply voltage of the power amplifier

Method used

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  • A power amplifier power supply voltage control method and system
  • A power amplifier power supply voltage control method and system
  • A power amplifier power supply voltage control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In Embodiment 1, a power amplifier power supply voltage control method specifically includes the following steps:

[0039] S01: Use voltage loop and current loop dual-loop control to adjust the output voltage of the power supply; specifically, the voltage loop is the outer loop, and the current loop is the inner loop. The error signal obtained by the proportional integral adjustment can be used as the given current signal of the current loop, and the difference between the given current signal and the real-time output current signal of the power supply can be used to obtain the error signal used to generate the modulation signal, and then adjust the output voltage of the power supply.

[0040] S02: superimpose the audio signal to the reference signal of the current loop control current, and then generate a modulation signal to adjust the output voltage of the power supply. Specifically, the power amplifier in this embodiment is specifically a Class D power amplifier, and ...

Embodiment 2

[0062] This embodiment has the same inventive concept as Embodiment 1. On the basis of Embodiment 1, a power amplifier power supply voltage control system is provided, such as image 3 As shown, the control system includes a loop control module, a voltage stabilizing module, a first signal acquisition module, and a second signal acquisition module. The first signal acquisition module is used to acquire the voltage signal and current signal of the voltage stabilizing module, and the second signal acquisition module It is used to collect the audio signal of the input power amplifier; the output end of the first signal acquisition module and the output end of the second signal acquisition module are connected to the loop control module, the output end of the loop control module is connected to the voltage stabilizing module, and the output end of the voltage stabilizing module is connected to the power amplifier , The first signal acquisition module is connected.

[0063] Specifi...

Embodiment 3

[0071] This embodiment has the same inventive concept as Embodiment 1. On the basis of Embodiment 1, a storage medium is provided, on which computer instructions are stored. When the computer instructions are running, a power amplifier power supply voltage control in Embodiment 1 is executed. method steps.

[0072] Based on this understanding, the technical solution of this embodiment is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. Several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM...

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Abstract

The invention discloses a power amplifier power supply voltage control method and system, belonging to the technical field of power supply voltage control. The method includes: adopting voltage loop and current loop dual-loop control to adjust the output voltage of the power supply; superimposing the audio signal into the reference signal of the current loop control current , and then generate a modulation signal to adjust the output voltage of the power supply. In the present invention, the audio signal is superimposed on the reference signal for controlling the current, which is equivalent to feeding back the output power of the power amplifier to the control link of the power supply in advance, so that the voltage loop and the current loop can perceive the output power of the power amplifier in advance, and output modulation on this basis The signal adjusts the output voltage of the power supply, so that the power supply can effectively respond to the change of the output power of the power amplifier, achieve the purpose of reducing the bus voltage fluctuation, improve the dynamic response of the power supply, effectively improve the performance of the power amplifier, and effectively reduce the energy storage capacitor of the power amplifier bus , reduce volume and cost.

Description

technical field [0001] The invention relates to the technical field of power supply voltage control, in particular to a power amplifier power supply voltage control method and system. Background technique [0002] At present, the switching power supply used in class D power amplifier (hereinafter referred to as power amplifier) ​​generally adopts a DC-DC topology after rectification and isolation. The switching power supply outputs the voltage and current required by the power amplifier, and the control between the switching power supply and the power amplifier is relatively independent. Since the output load of the power amplifier is a dynamic load that changes with the audio signal, the switching power supply is required to have a faster dynamic response to meet the requirement of less fluctuation in the bus voltage. There are generally two control methods for existing switching power supplies: one is open-loop control, the output voltage is determined by the grid voltage ...

Claims

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Application Information

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IPC IPC(8): H02M3/00H02M1/14H02M1/32H03F1/30
Inventor 徐远灿陈万垒
Owner 宜宾听点科技有限公司
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