Current-sharing control device and control method based on DSP control
A control method and flow control technology, applied in the field of DSP control, can solve the problems of lack of digital current-sharing high-frequency switching power supply, etc., and achieve the effect of improving use efficiency and economic benefits
Inactive Publication Date: 2016-08-24
BEIJING NAT RAILWAY LUYANG TECH CO LTD
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Problems solved by technology
In order to make each module equally share the load current, the output load current sharing technology must be adopted, but at present there is still a lack of digital current sharing high-frequency switching power supply developed by independent innovation to solve the current sharing problem existing in the working process of multiple power supply modules in parallel question
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[0018] The current sharing control device and control method based on DSP control provided by the present invention will be described in detail below with reference to the drawings and specific embodiments.
[0019] Such as figure 1 As shown, the current sharing control device based on DSP control provided by the present invention includes:
[0020] Signal sampling circuit 2, current signal conditioning circuit 3, DSP controller 4, current equalizing output signal conditioning circuit 5, diode 6 and current equalizing input signal conditioning circuit 8, wherein:
[0021] The signal sampling circuit 2 is a current signal sampling circuit, its input end receives the current signal output by a single power supply module, and its output end is connected to the input end of the current signal conditioning circuit 3; the current signal conditioning circuit 3, the current equalizing output signal conditioning circuit 5 and the equalizing The current input signal conditioning circui...
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The invention discloses a current-sharing control device and a control method based on DSP control. The device comprises a signal sampling circuit, a current signal conditioning circuit, a DSP controller, a current-sharing output signal conditioning circuit, a diode and a current-sharing input signal conditioning circuit. According to the current-sharing control device and the control method based on DSP control provided by the invention, automatic current sharing can be realized in an output and parallel condition by railway signal device power supply control. As a power supply module has a slow current sharing adjustment rate, when the number of power supply modules is increased or decreased, automatic current sharing again can be realized for the power supply module, and the using effects are not influenced; and in addition, when the total load of the power supply module exceeds current capable of being provided by the power supply module, the current sharing function can be exited temporarily. The above control method can stably control the current-sharing features of the power supply module. Theoretically, the parallel power supply modules are not limited by the number, the power supply module utilization efficiency can be improved, and economic benefits are further improved.
Description
technical field [0001] The invention belongs to the technical field of DSP control, and in particular relates to a current sharing control device and a control method based on DSP control. Background technique [0002] The power supply module is a matching module of the railway signal power supply screen, which provides DC 24V power supply for railway signal equipment to meet the relevant technical requirements of the railway signal power supply system for 24V DC power supply. The power module is a switching power supply using phase-shifting full-bridge soft switching technology, mainly composed of input lightning protection, input filtering, pre-stage AC / DC conversion circuit, post-stage DC / DC isolation transformer conversion circuit, auxiliary power supply, display function circuit, fan Control circuit and control circuit composition. In order to improve the reliability of the power supply module, the module also has a complete protection function, and adopts two-level pr...
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IPC IPC(8): H02M1/088
CPCH02M1/088H02M1/0025
Inventor 王树桐
Owner BEIJING NAT RAILWAY LUYANG TECH CO LTD