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A Digital Quadrature Signal Generator and Its Frequency Adaptive Method

A signal generator and frequency self-adaptive technology, which is applied in the direction of digital function generator, electrical digital data processing, digital data processing components, etc., can solve the problems of narrowing the application range and difficult to realize the self-adaptation of input signal frequency change, etc.

Active Publication Date: 2020-11-10
KEHUA DATA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequency of the system input signal is involved in the conversion from the s domain to the z domain, which makes it difficult for the parameters of the digital quadrature signal generator to adapt to the frequency change of the input signal, thereby limiting its application range

Method used

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  • A Digital Quadrature Signal Generator and Its Frequency Adaptive Method
  • A Digital Quadrature Signal Generator and Its Frequency Adaptive Method
  • A Digital Quadrature Signal Generator and Its Frequency Adaptive Method

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Embodiment Construction

[0030] The core of the present invention is to provide a digital quadrature signal generator and its frequency self-adaptation method. The parameters of the digital quadrature signal generator can realize self-adaptation to the frequency change of the input signal, thereby expanding its application range.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Please refer to figure 2 ,...

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Abstract

The invention discloses a digital orthogonal signal generator and a frequency self-adaption method thereof. According to the invention, the digital orthogonal signal generator is established; a digital orthogonal signal generator is directly established in a z domain; when the parameters of the digital orthogonal signal generator are established, the parameters are in one-to-one correspondence with the frequency of the system input signal; therefore, when the frequency of the input signal is changed, only the parameters of the digital orthogonal signal generator need to be updated on line, sothat the parameters of the digital orthogonal signal generator can realize self-adaption to the frequency change of the input signal, and the application range of the digital orthogonal signal generator is expanded.

Description

technical field [0001] The invention relates to the field of quadrature signal generators, in particular to a digital quadrature signal generator and a frequency adaptive method thereof. Background technique [0002] In order to realize the single-phase digital PLL (Phase Locked Loop, phase-locked loop) algorithm, or to obtain the positive and negative sequence voltage components of the three-phase mains, it is necessary to obtain the quadrature component corresponding to the system input signal. At present, a digital quadrature signal generator based on SOGI (Second Order Generalized Integrator, second-order generalized integral) is usually used to obtain the quadrature component corresponding to the system input signal. [0003] In the prior art, the SOGI-based digital quadrature signal generator is converted from the SOGI-based analog quadrature signal generator. Please refer to figure 1 , figure 1 It is a structural diagram of a SOGI-based analog quadrature signal gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/02
CPCG06F1/022
Inventor 易龙强
Owner KEHUA DATA CO LTD