Method and device for processing output voltage ripple of charger

A technology of output voltage ripple and output voltage, which is applied in the field of dealing with the output voltage ripple of chargers, and can solve problems such as large power frequency ripple

Active Publication Date: 2015-09-02
BEIJING DINGHAN TECH GRP CO LTD
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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 provide a method and device for processing the output voltage ripple of the charger with simple method and fast dynamic response, which solves the problem of large power frequency ripple in the output voltage of the charger and improves the quality of the output voltage

Method used

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  • Method and device for processing output voltage ripple of charger
  • Method and device for processing output voltage ripple of charger

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Embodiment 1

[0022] figure 1 It is a flow chart of the method for processing the output voltage ripple of the charger provided by Embodiment 1 of the present invention. The technical solution of this embodiment is applicable to the situation where the output voltage of the charger is adjusted to suppress the output voltage ripple. The method can be executed by a processing device for output voltage ripple of the charger, and the device can be implemented in the form of software and / or hardware, and is configured to be executed in a main control chip of the charger. see figure 1 As shown, the method for processing the output voltage ripple of the charger specifically includes the following steps:

[0023] Step S100, collecting the actual value of the bus voltage and the actual value of the output voltage in real time.

[0024] The voltage detection device (such as a sensor) contained in the charger itself can be used to collect the actual value of the bus voltage and the actual value of ...

Embodiment 2

[0032] Figure 2a It is a flow chart of the method for processing the output voltage ripple of the charger provided by the second embodiment of the present invention. On the basis of the first embodiment of the present invention, the method for processing the output voltage ripple of the charger further compares a preset bus voltage reference value with the actual bus voltage value to obtain an output voltage ripple adjustment value; and, Comparing the preset output voltage reference value with the actual output voltage value to obtain the output voltage adjustment value, the specific optimization is:

[0033] Perform analog-to-digital conversion on the preset bus voltage reference value, output voltage reference value, real-time collected bus voltage actual value and output voltage actual value;

[0034]calculating the difference between the bus voltage reference value after analog-to-digital conversion and the bus voltage actual value to obtain the ripple error amount, and ...

Embodiment 3

[0050] image 3 It is a schematic structural diagram of a processing device for output voltage ripple of a charger provided in Embodiment 3 of the present invention. see image 3 As shown, the processing device for the output voltage ripple of the charger includes:

[0051] The voltage acquisition module 300 is used to acquire the actual value of the bus voltage and the actual value of the output voltage in real time;

[0052] A digital signal processing module 310, configured to compare a preset reference value of the bus voltage with the actual value of the bus voltage to obtain an output voltage ripple adjustment value; and, compare a preset reference value of the output voltage with the actual value of the output voltage , to obtain the output voltage adjustment value;

[0053] The voltage adjustment module 320 is configured to obtain a driving adjustment value according to the output voltage ripple adjustment value and the output voltage adjustment value, adjust the ac...

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Abstract

The invention discloses a method and a device for processing an output voltage ripple of a charger. The method comprises a step of timely collecting a practical bus voltage value and a practical output voltage value; a step of comparing a preset bus voltage reference value with the practical bus voltage value to obtain an output voltage ripple adjusting value; a step of comparing a preset output voltage reference value with the practical output voltage value to obtain an output voltage adjusting value; and a step of obtaining a drive adjusting value according to the output voltage ripple adjusting value and the output voltage adjusting value and adjusting the practical output voltage value according to the drive adjusting value. According to the method provided by the invention, the output voltage ripple of the charger can be limited within an allowable range by repeatedly carrying out the abovementioned steps, and influences of the bus voltage ripple on the output voltage ripple are prevented under a precondition that the hardware cost is not increased.

Description

technical field [0001] The invention relates to a charger, in particular to a method and a device for processing the output voltage ripple of a charger. Background technique [0002] At present, most common charger modules in China use a topological structure consisting of a front-stage APFC (Active Power Factor Correction) circuit and a rear-stage isolated DC / DC (direct current) converter. In practical applications, after the single-phase AC power passing through the APFC circuit becomes DC power (bus voltage) with power frequency ripple, it enters the full bridge circuit and becomes an AC square wave voltage, and the AC square wave voltage passes through the high frequency transformer. After stepping down, it is sent to the full-bridge rectifier circuit and rectified into DC voltage. Among them, the full-bridge circuit, high-frequency transformer and full-bridge rectifier circuit together form a DC / DC resonant converter, and the resonant inductance to complete the zero-vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14
Inventor 杨鲜鲜路晓
Owner BEIJING DINGHAN TECH GRP CO LTD
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