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Device for realizing parallel current sharing of voltage source in feedback type DC power supply load circuit

A technology of DC power supply and load circuit, which is applied in the field of devices that realize voltage source parallel connection and current sharing. It can solve the problems of wasting energy, poor effect, and voltage source cannot be simply connected directly in parallel, and achieve the effect of solving limitations.

Inactive Publication Date: 2009-10-14
珠海启能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the power consumption resistive load used in the DC power supply aging detection in the prior art has the defects of wasting energy, polluting the environment, and not being effective.
The applicant filed an application for an invention patent on September 22, 2008 entitled "A Multi-Channel Wide-Voltage Input Power Feedback Electronic Load" with the application number 2008101986756, which effectively solved the above problems. However, due to the The upper voltage sources cannot be simply connected directly in parallel, which hinders the combined application of this regenerative DC power supply load circuit, so that in practical applications, various voltage sources with different voltages cannot be directly connected in parallel to cause this kind of regenerative DC power supply load. The limitation of the application of the circuit has seriously hindered the promotion and development of energy-saving and power-saving technologies.
[0003] To sum up; the current feedback type DC power supply load circuit in the prior art has application limitations, which seriously hinders the promotion and development of energy-saving and power-saving technologies

Method used

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  • Device for realizing parallel current sharing of voltage source in feedback type DC power supply load circuit
  • Device for realizing parallel current sharing of voltage source in feedback type DC power supply load circuit
  • Device for realizing parallel current sharing of voltage source in feedback type DC power supply load circuit

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Embodiment 1

[0015] Such as figure 1 , figure 2 As shown, the present invention includes a plurality of sets of DC power supply 1 connected in series, a feedback electronic load interface circuit 2, a DC / DC current sharing converter 3, and an isolated grid-connected inverter circuit 4. The DC power supply 1 is connected to the feedback electronic load interface Circuit 2, the output of the feedback electronic load interface circuit 2 is directly connected in parallel with the input end of the isolated grid-connected inverter circuit 4 through the DC / DC current sharing converter 3, and the isolated grid-connected inverter circuit 4 The output terminal is connected to the grid.

[0016] In this embodiment, the DC / DC current sharing converter 3 is a step-up circuit, and the DC / DC current sharing converter 3 includes a capacitor C, an inductor L, a crystal diode D, and a switch tube T. The DC The circuit connection when the / DC current equalizing converter 3 is a step-up type is: the two en...

Embodiment 2

[0018] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is that the DC / DC current sharing converter 3 is a step-down type, and the circuit connection of the DC / DC current sharing converter 3 is: the capacitor C The two ends of the capacitor C are circuit input ends, one end of the capacitor C is connected to the source of the switch tube T, the other end of the capacitor C is connected to the positive electrode of the crystal diode and is the output end of the circuit, and the drain of the switch tube The pole is connected with the cathode of the crystal diode and one end of the inductance L, the other end of the inductance L is the other end of the circuit output, and the gate of the switching transistor T is connected with the modulation and driving circuit.

Embodiment 3

[0020] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the DC / DC current sharing converter 3 is an isolated circuit, which includes four diodes D1, D2, D3, D4 and four switch tubes T1, T2, T3, T4, capacitor C, inductance L and isolation transformer B, the positive and negative poles of the four diodes D1, D2, D3, D4 form a bridge circuit connection, the four diodes D1, D2, D3, D4 The output end of the bridge circuit formed is the output end of the DC / DC current sharing converter 3, the input end of the bridge circuit composed of the four diodes D1, D2, D3, D4 and the secondary of the isolation transformer B stage winding connection, the source and drain of the four switch tubes T1, T2, T3, T4 form a bridge circuit connection, the source and drain of the four switch tubes T1, T2, T3, T4 form a bridge circuit The input end of the circuit is the input end of the DC / DC current sharing converter 3, the output end of the bridge circuit co...

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Abstract

The invention discloses a device for realizing parallel current sharing of a voltage source in a feedback type DC power supply load circuit, aiming at providing a device for realizing parallel current sharing of the voltage source with various unequal voltage values in the feedback type DC power supply load circuit, so as to effectively overcome the limitation of the feedback type DC power supply load circuit on the application. The device comprises a plurality of groups of DC power supplies (1) formed by series connection, a feedback electronic load interface circuit (2), a DC / DC current sharing convertor (3) and an isolated grid inverter circuit (4), the output of the DC power supplies (1) formed by series connection is switched in the feedback electronic load interface circuit (2) which comprises an input circuit formed by serially connecting diodes, and the output of the feedback electronic load interface circuit (2) is directly connected with the input end of the isolated grid inverter circuit (4) in parallel after passing through the DC / DC current sharing convertor (3); and the output end of the isolated grid inverter circuit (4) is connected with electricity grid.

Description

technical field [0001] The invention relates to a device for realizing parallel current sharing of voltage sources in a feedback type DC power supply load circuit. Background technique [0002] The power consumption resistive load used in the current DC power supply aging detection in the prior art has the defects of wasting energy, polluting the environment and having poor effect. The applicant filed an application for an invention patent on September 22, 2008 entitled "A Multi-Channel Wide-Voltage Input Power Feedback Electronic Load" with the application number 2008101986756, which effectively solved the above problems. However, due to the The upper voltage sources cannot be simply connected directly in parallel, which hinders the combined application of this regenerative DC power supply load circuit, so that in practical applications, various voltage sources with different voltages cannot be directly connected in parallel to cause this kind of regenerative DC power suppl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10H02M3/04
Inventor 马文长
Owner 珠海启能科技有限公司
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