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Intelligent processing method for driving signal of all-digital power amplifier

A technology for driving signals and processing methods, applied in the fields of signal processing, electronics and communications, can solve the problems of insufficient overload capacity, insufficient power reserve capacity, and poor output signal quality in analog mode, and achieve fine input signal, reduce output distortion, The effect of increasing the output power

Active Publication Date: 2021-09-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the PA2000 series power amplifier adopts soft-switching resonance control technology, and the peak power of a single unit can reach 20kVA. Errors generated, but the overload capacity of the analog method is insufficient, the power reserve capacity is insufficient, and crossover distortion and mismatch distortion are prone to occur
The peak power of a single HVA60 series power amplifier can reach 60kVA, and the drive module is fully digitalized, but the output signal quality is poor, and the waveform distortion is much higher than that of PA2000

Method used

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  • Intelligent processing method for driving signal of all-digital power amplifier
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Experimental program
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Effect test

Embodiment 1

[0071] This embodiment is the self-adaptive feedback adjustment of the dead zone. The establishment of the dead zone time will have an impact on the system, and in order to ensure the normal operation of the system, the dead zone time cannot be 0. It is found through experiments that the dead zone time should not be too large or too small , it is necessary to adjust the appropriate dead time according to different input parameters of the system. The dead zone adaptive adjustment algorithm of the present invention increases the dead zone time when the input triangular wave signal frequency is small and the output current of the super high power amplifier is small; when the input triangular wave signal frequency is high and the output current of the super high power amplifier is large , to reduce the dead time, the specific effect is as follows.

[0072] Such as figure 2 As shown, when the triangular wave input frequency is 19.5kHz and the sine wave frequency is 500Hz, the dea...

Embodiment 2

[0075] Apply a full-digital ultra-high power amplifier drive signal processing method proposed by the present invention to the actual amplifier, and compare it with the HVA60 series power amplifier of Aerospace Hill, a leading domestic ultra-high power amplifier company, and the experimental results Figure 4 , Figure 5 shown.

[0076] When the input frequency of the triangle wave is 19.5kHz and the frequency of the sine wave is 500Hz, the dead time is set to 1.12us. The results of the Aerospace Hill HVA60 power amplifier are as follows: Figure 4 Shown, the result of the inventive method is as Figure 5 shown.

[0077] It can be seen from the figure that the signal distortion of the comparison product is much greater than the amplified signal generated by this method, not only the signal distortion occurs, but the signal quality is far inferior to this method.

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Abstract

The invention discloses a full-digital super-power amplifier driving signal processing method, which utilizes a full-digital signal processing method to generate a plurality of paths of PWM (Pulse Width Modulation) waves with different phases to drive a power amplifier by comparing an input sinusoidal signal with a generated multi-phase triangular wave, so that the single-machine output power of the amplifier is effectively improved. Meanwhile, the quality of the driving signal of the power amplifier in a high-power environment is ensured, the output signal-to-noise ratio of the amplifier is effectively improved, and the output distortion degree of the amplifier is reduced.

Description

technical field [0001] The invention belongs to the technical fields of electronics, communication and signal processing, and in particular relates to a driving signal processing method of an all-digital ultra-high power amplifier. Background technique [0002] Ultra-high power amplifiers are an important part of many electric systems. The development of industries such as aerospace, ships, locomotives, and medical care is inseparable from ultra-high-power amplifiers, and higher requirements are placed on the performance of ultra-high-power amplifiers. From tube amplifiers to transistor linear amplifiers to digital switching amplifiers, power amplifiers have been developed for three generations. Among them, the electronic tube power amplifier is basically not used in the newly produced equipment. The switch power amplifier has been developed abroad in recent years. Most of the old domestic test equipment adopts the linear power amplifier. Compared with the switching power am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20
CPCH03F3/20Y02D30/70
Inventor 郑德智李大鹏那睿
Owner BEIHANG UNIV
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