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Power conversion device

A technology of power conversion and AC power supply, which is applied in the direction of output power conversion devices, high-efficiency power electronic conversion, power supply testing, etc. It can solve the problems of power converter performance degradation, affecting power converter performance, and shortening working life.

Inactive Publication Date: 2020-06-16
CHICONY POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the main body capacitance ages with the accumulation of charging and discharging times, the main body capacitance affects the performance of the power converter
Secondly, if the main body capacitor is exposed to harsh working environments (such as high temperature or high humidity) for a long time, its working life will be shortened, and the performance of the power converter will also deteriorate earlier.

Method used

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Examples

Experimental program
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Embodiment Construction

[0033] figure 1 To illustrate a circuit block diagram of a power conversion device according to some embodiments of the present invention, the power conversion device 10 is used to convert the AC power output by the AC power supply device (Alternating Power Supplier) 90 into a DC power, and output the DC power to a load 92.

[0034] The aforementioned AC power supply device 90 may be, but not limited to, a commercial power grid. The aforementioned load 92 may be, but not limited to, any load, for example, an electronic device, a mobile phone, a tablet, a computer, a desktop computer or a notebook computer, and the like.

[0035] figure 1 In the embodiment, the power conversion device 10 includes a primary side circuit 20 , a body capacitor 30 , a conversion circuit 40 , and a general control circuit 50 .

[0036] The primary side circuit 20 has two output terminals 22a, 22b. The primary side circuit 20 is suitable for rectifying and boosting the AC power and outputting a pr...

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PUM

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Abstract

The present invention provides a power conversion device. The power conversion device includes a primary-side circuit, a bulk capacitor, a conversion circuit, and a master control circuit. The primary-side circuit is adapted to rectify and boost an alternating-current power and output primary-side output. The bulk capacitor is connected in parallel to two output ends of the primary-side output. The conversion circuit is configured to receive the primary-side output passing through the bulk capacitor and convert the primary-side output into secondary-side output. The master control circuit detects an electric power state of the alternating-current power, obtains a time interval, a power of the secondary-side output corresponding to the time interval, and two of the capacitor voltages corresponding to the start and the end of the time interval when the electric power state is power-off, and selectively outputs an abnormal signal according to the time interval, the power, the capacitor voltages, and a threshold.

Description

technical field [0001] The present invention relates to a power conversion device, in particular to a power conversion device with a bulk capacitor. Background technique [0002] AC-DC power converters are used to convert AC power to DC power. Most power converters for mobile devices use switching power converters in consideration of size, weight and conversion efficiency. Most power converters include a primary side circuit and a conversion circuit. The primary side circuit is usually equipped with a bulk capacitor to smooth the output voltage of the primary side circuit. The working state of the main body capacitor affects the operating performance of the entire power converter. When the body capacitance ages with the accumulation of charging and discharging times, the body capacitance affects the performance of the power converter. Secondly, if the main body capacitor is exposed to harsh working environment (such as high temperature or high humidity) for a long time, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/335
CPCH02M7/217H02M3/33571H02M1/4225H02M3/01H02M3/33523H02M3/3376H02M3/33553G01R31/40G01R31/64Y02B70/10H02M1/0058H02M1/007G01R27/2605
Inventor 蔡宪逸
Owner CHICONY POWER TECH CO LTD