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Multipath direct current power supply circuit

A DC power supply and circuit technology, which is applied in the arrangement of electric lamp circuits, parallel operation of DC power supplies, electric light sources, etc., can solve the problems of large excitation current, low power density, and large size of the whole machine.

Active Publication Date: 2012-05-16
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively large size and large number of current sharing transformers, the overall volume of the circuit to realize the circuit is large and the power density is low; The excitation current on the circuit is large, the power loss of the current sharing transformer is large, and the current sharing efficiency is low

Method used

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  • Multipath direct current power supply circuit
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  • Multipath direct current power supply circuit

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Embodiment Construction

[0029] Hereinafter, the implementation of the multi-channel DC power supply circuit in the embodiment of the present invention will be described in detail in conjunction with the accompanying drawings.

[0030] The multi-channel DC power supply circuit of the present invention includes: an AC source, a first power supply unit and a second power supply unit;

[0031] At least one of the power supply units includes at least two power supply branches; the first output end of the AC source is respectively connected to the first end of each power supply branch in the first power supply unit; the second output end of the AC source is respectively connected to the second power supply branch The first end of each power supply branch in the unit; the first power supply unit is connected to the second ends of all power supply branches in the second power supply unit;

[0032] The circuit also includes:

[0033] A DC blocking capacitor is respectively arranged between the first output e...

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PUM

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Abstract

The invention discloses a multipath direct current power supply circuit which comprises an alternating current source, a first power supply unit and a second power supply unit. Each of the power supply units comprises at least two paths of power supply branches. A first output terminal of the alternating current source is connected with a first terminal of each path of power supply branch in the first power supply unit respectively. A second output terminal of the alternating current source is connected with a first terminal of each path of power supply branch in the second power supply unit respectively. Second terminals of all power supply branches in the first power supply unit and the second power supply unit are connected. The circuit also comprises blocking capacitors between the first output terminal and the first terminal of each path of power supply branch in the first power supply unit respectively, and blocking capacitors between the second output terminal and the first terminal of each power supply branch in the second power supply unit respectively The power supply circuit has the advantages of high efficiency, low cost and good current sharing performance.

Description

technical field [0001] The invention relates to power supply technology, in particular to a multi-channel direct current power supply circuit. Background technique [0002] At present, for LED constant current control driven by multiple LEDs, the most commonly used solution is a constant voltage module + multiple non-isolated DC / DC constant current modules. [0003] Such as figure 1 Shown is an LED constant current control circuit driven by multiple LEDs in the prior art. In this circuit, the input voltage Vac is used as the input of multiple non-isolated DC / DC constant current modules after passing through the constant voltage module, and each non-isolated DC / DC constant current module performs constant current control independently. However, since the voltage of the constant voltage module and the voltage of the LED generally have a large voltage difference, the efficiency of the multi-channel non-isolated DC / DC constant current module in the subsequent stage will not be...

Claims

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Application Information

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IPC IPC(8): H02J1/10H05B37/02
Inventor 吴新科华桂潮
Owner INVENTRONICS HANGZHOU
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