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DC power supply unit

A technology of DC power supply and AC power supply, applied in the direction of output power conversion device, electrical components, irreversible AC power input conversion to DC power output, etc., can solve the problems of expensive and difficult DC power supply devices, and achieve low-cost Effect

Inactive Publication Date: 2015-11-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, DC-CTs are generally expensive, so it is difficult to form an inexpensive DC power supply when using DC-CTs

Method used

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  • DC power supply unit
  • DC power supply unit
  • DC power supply unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0073] figure 1 It is a figure which shows the structure of the DC power supply apparatus concerning Embodiment 1 of this invention. Such as figure 1 As shown, the DC power supply device of Embodiment 1 includes: a reactor 2 connected to one AC line of the AC power supply 1; a first current detection unit 3 that detects the current flowing through the reactor 2, that is, the input current; and includes a rectifying element 4a and the unidirectional switching element 4b, the switching part 4 as a bidirectional switching unit that short-circuits / opens (turns on / off) the AC power supply 1 via the reactor 2; A rectifier circuit 5 connected to the rectifier circuit 5; a smoothing capacitor 6 connected between the DC output terminals of the rectifier circuit 5; and a second current detection unit 7 that detects the current flowing through the switching element 4b.

[0074] Among them, the switching element 4b in the DC power supply device of Embodiment 1 does not necessarily use...

Embodiment approach 2

[0112] Figure 9 It is a diagram showing the configuration of a DC power supply device according to Embodiment 2 of the present invention. Such as Figure 9 As shown, the DC power supply device of the second embodiment is the same as the above-mentioned first embodiment, and includes: a reactor 2 connected to one AC line of the AC power supply 1; Current detection part 3; including rectifying element 4a and unidirectional switching element 4b, switching part 4 as a bidirectional switching unit that short-circuits / opens (turns on / off) AC power supply 1 via reactor 2; AC input A rectifier circuit 5 whose terminals are respectively connected to both ends of the switch unit 4; a smoothing capacitor 6 connected between the DC output terminals of the rectifier circuit 5; and a second current detection unit 7 which detects the current flowing through the switch element 4b.

[0113] In addition, the DC power supply device according to Embodiment 2 includes a control unit 8 and an AC...

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PUM

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Abstract

This DC power source device is provided with: a rectifier circuit (5) that rectifies an AC voltage from an AC power source (1); a switching unit (4) that turns on / off the AC voltage from the AC power source (1) via an inductor (2), and that is configured containing a rectifier element (4a) and a unidirectional switching element (4b); a smoothing capacitor (6) provided to the output side of the rectifier circuit (5); a first current detection unit (3) that detects the current input from the AC power source; and a second current detection unit (7) that detects the current flowing through the switching element (4b) when the switching element (4b) is on. Using the first current detection unit (3) and the second current detection unit (7), a control unit (8) detects an imbalance in input current, and controls the input current to be approximately sinusoidal.

Description

technical field [0001] The present invention relates to a DC power supply device, in particular to an input current detection method in the DC power supply device, wherein the DC power supply device includes a rectification circuit for rectifying the AC voltage from an AC power A switching unit that short-circuits / opens (turns on / off) the AC voltage of the power supply, controls the DC output voltage to a desired voltage and controls the input current from the AC power supply to a predetermined waveform (sine wave, etc.). Background technique [0002] The DC power supply device has a structure in which the AC voltage from the AC power supply is turned on / off via a reactor by using a switch unit, thereby controlling the input current from the AC power supply to a sinusoidal wave shape, while controlling the input current from the AC power supply to be sinusoidal. Convert the AC voltage to the desired DC voltage. In such a configured DC power supply unit, for example, when di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M1/4208Y02B70/126Y02B70/10
Inventor 京极章弘土山吉朗吉田泉川崎智广戴鑫徽
Owner PANASONIC CORP