Method for feeding back switch power supply aging energy and realizing circuit
A technology of energy feedback and switching power supply, which is applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of inconvenient implementation, impossibility of implementation, and sharp increase in cost, and achieve the effect of simple structure, low cost, and simple implementation method
Active Publication Date: 2010-02-03
SHINRY TECH
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However, it is very complicated to implement. Since each module needs corresponding DC / DC correspondence, a large number of complicated connecting wires are required from the aging cabinet to the inverter module, which is not only inconvenient to implement, but also expensive
Moreover, this feedback method only corresponds to a single output. For multiple outputs, such as a plasma TV power supply with more than a dozen outputs, the connection will become extremely complicated and impossible to realize, and the cost will also increase dramatically.
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[0025] The core idea of the method of the present invention is: the output of the multi-channel output power supply module is connected to the parallel busbar through the current equalizing circuit, and then uniformly inverted by the parallel busbar to feed back to the power grid.
[0026] In order to facilitate a further understanding of the present invention, the present invention will now be described in detail in conjunction with the accompanying drawings and specific embodiments.
[0027] see image 3 The embodiment shown is a plasma TV (PDP) power supply of a flat panel TV power supply, OUTPUT1 corresponds to the Vs road output by the PDP, what OUTPUT2 corresponds to is the Va road output by the PDP, and what OUTPUTn corresponds to is exactly the +5V road output by the PDP. Take the Vs circuit as an example, the Vs output is connected in parallel with the busbar through the current equalizing circuit (C.B.C). If we aging 40 PDP power supplies in an aging cabinet, then ...
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The invention discloses a switch power aging energy feeding method and realizing circuit. The method is connecting the output of switch power source and parallel connection generatrix via flow equalization circuit, and then it is inversed by the parallel connection generatrix to feed back to electric network. Thereinto said flow equalization circuit includes controllable switch Q1, sampling resistance R1, proportion amplifying circuit (501), and negative feedback circuit (502), and voltage-dividing resistance R2, R3, R4, diode D2. The invention realizes parallel connection one output of the multiple outputs power source, then by parallel connection of generatrix to realize inversion to feedback electric network. So problems of aging and feedback of the multiple outputs power source are resolved, the method does not need function of parallel connection of module power source, the application range is increased. And the realizing method is easy, cost is low, feedback efficiency is high.At the same time the realizing circuit is accurate, structure is simple. The invention also fits for small power source aging feedback which is output in single path.
Description
technical field [0001] The invention relates to the field of aging energy feedback of switching power supplies, in particular to a method and a circuit for implementing aging energy feedback of multi-channel output power supplies. Background technique [0002] With the shortage of energy and the deterioration of the environment, our demand for green energy and green manufacturing is becoming stronger and stronger. The energy return during the aging process is an important part of green manufacturing. [0003] As we all know, if the aging of switching power supply is purely resistive, it will be a huge waste of energy, and it is also an important factor for the high manufacturing cost. Especially for the manufacture of high-volume, high-power power supplies, this waste is particularly obvious. Most of the current aging still adopts pure resistive aging, and there are already some solutions to the energy feedback problem of aging, but there are various problems and limitatio...
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IPC IPC(8): H02J3/38G01R35/00
Inventor 吴壬华李英胡峻凡
Owner SHINRY TECH