Group control method of multiplexed output module power supply with low crossed adjusting rate

A technology of cross-regulation and multi-channel output, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and controlling/regulating systems. It can solve problems such as low cost and increased difficulty in transformer optimization design, and achieve cost Inexpensive, improved voltage accuracy and cross-regulation, easy to implement

Inactive Publication Date: 2013-03-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This solution is low in cost and simple in structure, but it limits the improvement of the power density of the converter, and with the increase of the number of circuits, the difficulty of optimal design of the transformer increases

Method used

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  • Group control method of multiplexed output module power supply with low crossed adjusting rate

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Embodiment Construction

[0018] Attached figure 1 Taking three outputs of 5V and ±15V as an example, the circuit schematic diagram of a low-voltage input three-output module power supply is given. The main circuit topology adopts the flyback converter topology, and the capacitor C 1 Parallel to the input voltage V in Both ends, inductance L 1 One end is connected to the input voltage, the other end is connected to the capacitor C 2 Connection, capacitance C 2 The other end of is connected to the negative end of the input voltage. transformer T 1 The end of the same name of the primary winding and L 1 with C 2 Connected to the common end, and the non-identical end is connected to the switch tube Q 1 The drain connection, Q 1 The source of is connected to the negative terminal of the input voltage. T 1 The non-homonymous end of the secondary winding and the diode D 1 Connect the anode of the terminal and the capacitor with the same name C 3 Connected to one end, C 3 On the other end with D 1 The cathode i...

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Abstract

The invention provides a group control method of a multiplexed output module power supply with a low crossed adjusting rate. In a control process of the method, an multiplexed output is divided into 2-3 groups and a controller is arranged for each group to respectively control an output of each group; in a grouping process, one or more paths of outputs with the similar output power or in the same working mode are divided into one group; and when one group contains two paths of the outputs or more, weighting feedback is carried out. The group control method is characterized in that the outputs with the similar output power or in the same working mode are combined into a transformer to reduce the height of the transformer and reduce the leakage inductance of the transformer. Different groups can relatively independently carry out closed ring control or multi-path weighting feedback control so that the voltage precision and the crossed adjusting rate of the multiplexed output are improved.

Description

Technical field [0001] The invention relates to a low-voltage input multiple-output module power grouping control method with low crossover adjustment rate, which is applied to a low-voltage input multiple-output direct-to-direct module power supply system, and belongs to the category of power electronic conversion technology. Background technique [0002] Multiple output regulation technology is a key technology in the direct-to-direct module power supply. The multiple output of the converter generally adopts the method of multiple secondary windings of the transformer. It has the following advantages: 1) The introduction of the transformer makes the primary and secondary sides isolated from each other. Therefore, the safety is high; 2) Each output is independent of each other, avoiding the noise and cross-coupling interference caused by the large current between the power ground wires; 3) The volume of the power module is reduced and the power density is improved. In the design...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 温振霖任小永阮新波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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