Current quick shifting method and direct current power supply

A technology of DC power supply and transfer method, applied in the direction of irreversible AC power input conversion to DC power output, DC power input conversion to DC power output, electrical components, etc. To achieve the current limiting effect and other problems, to achieve the effect of low overvoltage and small installation size

Active Publication Date: 2011-08-10
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the higher the voltage, the smaller the cold-state resistance of metal tungsten, and the faster the current transfer; but if the voltage is too high, the volume of the arc extinguishing chamber will become larger. If the cold-state resistance of metal tungsten is too small, the temperature cannot rise rapidly. The PTC effect is not obvious, so the predetermined current limiting effect cannot be achieved

Method used

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  • Current quick shifting method and direct current power supply
  • Current quick shifting method and direct current power supply
  • Current quick shifting method and direct current power supply

Examples

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Embodiment 1

[0027] Such as figure 1 , figure 2 As shown, a current fast transfer DC power supply designed according to the above method includes a rectifier transformer, a controllable rectification circuit, a filter circuit, a fast switching IGBT (using a high-power IGBT), and consists of 2-8 IGBTs (IGBT1~IGBT9) and 2-8 resistors (R1~R9) form the current fast transfer branch, the rectifier transformer isolates the input power supply, and provides a suitable voltage, the controllable rectifier circuit converts the AC signal output by the transformer into a DC signal, and passes through the filter circuit , the current with small current ripple and high precision is obtained, the fast switch controls the IGBT current on and off, the current fast transfer branch composed of IGBT and resistor controls the current transfer depth, and is connected to the subsequent load. All IGBTs are controlled on and off by a unified control system. By controlling the on and off of IGBTs, the rapid transfe...

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PUM

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Abstract

The invention discloses a current quick shifting method and direct current power supply. The characteristics of high speed, small loss, pressure resistance and strong through-current capability of an IGBT (insulated gate bipolar transistor) switch are used; the IGBT is used as a quick switch to control the on-off of a power supply; then a current quick shifting branch is formed by a plurality of IGBTs and a plurality of resistors, and is connected with a backward-level load; the on-off of all the IGBTs is independently controlled by a uniformed control system; the on-off of the IGBTs can be controlled so as to control the quick shifting of currents and adjust the switching depth and switching width of the currents. Checked by practice, the invention has the characteristics such as quick current switching response speed, high switching precision, small current ripples, and the like, and is suitable to be popularized and used in a plurality of occasions requiring current switching.

Description

technical field [0001] The invention belongs to the rapid current transfer technology in the technical field of power electronics, and in particular relates to a method for rapid current transfer and a direct current power supply for rapid current transfer. Background technique [0002] In some industrial applications and scientific research experiments, it is often necessary to have a DC power supply with small output current ripple, high stability, rapid change in large current output, and fast response to on and off. In order to make the output current ripple small, a large inductance filter is generally added to the circuit. Due to the use of large inductance filtering, it is difficult to achieve fast response (microsecond level) changes in large current output, so the current fast transfer technology is introduced. The so-called fast current transfer technology is to use the fast switching characteristics of some power electronic devices to transfer the current of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M7/12
Inventor 张敏赵道德陈洁莲陶洪亮
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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