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Divider

A magic device, the first linear technology, applied in the field of dividers, can solve the problems of high price and large error, and achieve the effect of reducing costs

Active Publication Date: 2015-10-07
忱芯科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The input voltage feedforward signal is inversely proportional to the input voltage, so a special divider chip is required to realize it, but the price of the existing divider chip is relatively high
In order to reduce the cost, some literatures propose the method of using a single linear function approximation, but the error is large, so the study of a divider with high precision, simple structure and low cost has important theoretical significance and application value

Method used

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Examples

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specific example

[0014] Specific example: If the input voltage feedforward signal is

[0015] U o _ t h = 5.7 - 94.655 U i n - - - ( 1 )

[0016] After optimization, the resistance value of this divider is: R 1 = 37.622kΩ, R 2 = 10kΩ, R 3 =20.235kΩ, R 4 = 6kΩ, R 5 = 10kΩ, R 6 = 10kΩ, R 7 =17.347kΩ, R 8 =141.716kΩ, R 9 = 10 kΩ.

[0017] figure 2 The waveform obtained by formula (1) and the waveform obtained by this divider are given, as well as the relative error e% of the two. The relative error e% of the two is

[0018] e % = U o _ a ...

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Abstract

The invention discloses a divider which is composed of two linear amplifying circuits and a minimum value circuit. The division function is achieved through two linear functions, the structure is simple, cost is low, accuracy is high, and the error of a special divider chip is within 4%.

Description

technical field [0001] The invention relates to the technical field of analog electronics, in particular to a divider. Background technique [0002] In recent years, with the increasing date of fossil energy and environmental pollution, the development and application of renewable energy has attracted widespread attention from countries all over the world. In the renewable energy power generation system, since the output of renewable energy such as solar energy and fuel cells is direct current with a wide range of variation, and the grid voltage is alternating current with a fixed frequency and amplitude, a straight-to-straight converter is required to convert the wide range of direct current. A constant direct current is sent to the subsequent grid-connected inverter. In order to eliminate the influence of wide input voltage on output voltage and inductor current, it is usually required to add input voltage feedforward signal in the control system. However, the input volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F7/52
Inventor 姚志垒于学华陆广平王明辉顾春雷阚加荣
Owner 忱芯科技(上海)有限公司
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