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AC/DC converter comprising plural converters in cascade

A converter and boost converter technology, which is applied in the direction of converting irreversible AC power input into DC power output, DC power input into DC power output, and AC power input into DC power output, etc.

Inactive Publication Date: 2007-07-11
康默吉技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to the problems listed above, there are various other problems with these types of converters

Method used

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  • AC/DC converter comprising plural converters in cascade
  • AC/DC converter comprising plural converters in cascade
  • AC/DC converter comprising plural converters in cascade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Referring to the drawings, and initially to Figures 1 to 3, there is shown an AC / DC converter generally indicated by reference numeral 1 and having an AC / DC conversion stage 2 comprising a dual-mode input stage and DC / DC conversion stage 3 .

[0036] Referring now to FIG. 2, the AC / DC conversion stage 2 includes an input terminal 70 that feeds an input EMI filter 4, which in turn feeds a rectifier bridge, generally indicated by reference numeral 5, which in turn feeds A negative temperature coefficient thermistor (NTC) 6 combined with rectifying elements 7 and 8 in the rectifying bridge 5 is fed. These components in turn feed the input tracking boost converter choke (i.e. input choke 10 with additional winding 11) which in turn feeds chip inductor 12 and capacitor connected across switch 15 13 Feed. A boost diode 16 is provided and finally, a large capacitor 17 is also provided. The holding expansion circuit 20 is connected to both ends of the large capacitor 17 for ...

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PUM

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Abstract

The present invention relates to an AC / DC converter (1) of the type having an AC / DC conversion stage (2) and a DC / DC conversion stage (3), the AC / DC conversion stage (2) comprising an input filter stage (4), an input rectifier stage (5) and a tracking boost converter stage. The boost converter stage in turn comprises an input choke (10), a boost diode (16) and a bulk capacitor (17). The bulk capacitor (17) is arranged to store a range of voltages substantially proportional to the input voltage of the converter. The DC / DC stage (3) is arranged to receive the range of voltages from the bulk capacitor (17) and is controllable to provide a desired DC output regardless of the voltage received from the bulk capacitor (17). This is achieved through careful combination of components and use of output feedback control to control the voltage applied to an isolated transformer (41) in the DC / DC stage.

Description

technical field [0001] The present invention relates to an AC / DC converter comprising an AC / DC conversion stage and a DC / DC conversion stage, the AC / DC conversion stage includes a dual-mode input stage with an input filter and an input rectification circuit, the AC / DC conversion stage further includes The boost converter stage is tracked by a pre-regulator with an input boost choke, a boost diode and a large capacitor capable of storing a range of DC voltages substantially proportional to the input AC voltage. Background technique [0002] AC / DC converters have been around for many years and are widely used throughout the electronics industry. These converters draw power from a power line or source and produce a predetermined DC output (usually a lower voltage required by electronic circuits for industrial, communications, computing, medical and general applications). Typically, an AC / DC converter involves performing "power factor correction" (i.e. drawing a current that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M3/337H02M1/00H02M7/12H02H9/00H02M1/42
CPCY02B70/126H02M3/3376H02M7/125H02M1/4225H02M3/33569Y02B70/10H02M3/33571H02M1/0085
Inventor G·杨
Owner 康默吉技术有限公司
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