Power source conversion device
A power conversion and electronic technology, applied in the direction of irreversible AC power input conversion to DC power output, etc., can solve the problems of large size, limited power factor correction effect, complex external circuit and so on
Active Publication Date: 2013-11-13
DELTA ELECTRONICS INC
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Problems solved by technology
Existing power factor improvement circuits can be divided into two categories: passive and active. Passive power factor improvement circuits use passive components (such as inductors and capacitors) to improve the power factor. Although the structure is simple, it is bulky and the power factor correction Disadvantages such as limited effect
[0005] The active power factor improvement circuit mainly uses an external circuit to achieve the purpose of power factor correction. Compared with the passive type, it has the advantages of small size, light weight and high power factor. However, most of the existing active power factor improvement circuits Requires complex external circuits, and requires readjustment or design for different harmonic components
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[0056] see figure 1 , which is a schematic diagram of a power conversion device 100 according to a preferred embodiment of the present invention. The power conversion device 100 receives an AC power input 200 to drive an electronic load 202, wherein, in this preferred embodiment, the AC power input 200 is a three-phase AC power input.
[0057] Such as figure 1 As shown, the power conversion device 100 includes a rectification module 110 , an active switching element S1 , an input voltage detection module 130 , an output voltage detection module 140 , a current detection module 150 and a digital processing module 160 .
[0058] The rectification module 110 is coupled to the AC power input 200 . The active switching element S1 is coupled between the rectification module 110 and the electronic load 202 , and both ends of the active switching element S1 are connected in parallel to both ends of the electronic load 202 . In this embodiment, the active switching element S1 may fu...
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The invention discloses a power source conversion device which is used for driving an electronic load. The power source conversion device comprises a rectification module, an active type switch element, a driving module, an input voltage detection module, an output voltage detection module, a current detection module and a numerical code processing module. The active type switch element is in parallel connection with the electronic load. The input voltage detection module is used for sampling and inputting sampling voltage waveforms. The output voltage detection module is used for sampling and outputting sampling voltage waveforms. The current detection module is used for sampling actual input current waveforms. The numerical code processing module generates current reference instructions according to the input sampling voltage waveforms and the output sampling voltage waveforms and dynamically switches the conducting state of the active type switch element according to the current reference instructions and the actual input current waveforms.
Description
technical field [0001] The present disclosure relates to a power conversion device, and more particularly to a power conversion device with a power factor correction function. Background technique [0002] Due to the energy crisis in recent years, in addition to the development of new energy sources, countries have increasingly stringent requirements for existing electrical products, especially power factor and total harmonic distortion. In the new power standards (such as IEC 61000 -3-12 specification) has certain requirements on the total current harmonic distortion, which affects the designer's design considerations in the product. [0003] General electrical equipment is often not purely resistive, but whether it is inductive or capacitive, it will lead to poor power factor. Poor power factor will lead to an increase in input current and increase the burden on the power supply system. In addition, the input current Severe distortion, including a large number of harmonic...
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IPC IPC(8): H02M7/12
Inventor 袁德威周逸凯曾建瑜陈昱仁
Owner DELTA ELECTRONICS INC