Parallel democratic bus uniform flow constant current method and its device

A technology of constant current method and bus bar, which is applied in the direction of constant current power supply DC circuit, etc., can solve the problems of low, incapable of current equalization and reliability of parallel structure, and achieve the effect of improved utilization rate and good constant current effect

CN1988308AInactive Publication Date: 2007-06-27GUANGZHOU QINGTIAN INDAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2007-06-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses a uniform and constant current method for parallel democratic bus, which compares current signals of constant branches with bus mean value and suppresses the branches with current exceeding the mean value, and carries out constant control to the general current by the constant current branches to reach the aim of mean distribution of the branches and constant general current, at the same time, the branches have their independent protection circuit and common indication to fault.
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Description

technical field

[0001] The invention relates to a method of equalizing and constant current, in particular to a method of equalizing and constant current of parallel-connected democratic buses; the invention also relates to a device for realizing the above method. Background technique

[0002] In the formation and testing system of power batteries or other constant current control systems, constant current source technology is one of the key technologies related to the performance and reliability of the entire system, directly related to the accuracy of product testing and product quality. At present, the commonly used high-current linear constant current sources mostly adopt a simple parallel structure or a master-slave follower current sharing parallel structure.

[0003] For the simple parallel connection method, since there is no current sharing measure or a simple resistance current sharing method is used, and the parameters of each branch have a certain dispersion, the...

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Embodiment Construction

[0020] specific implementation

[0021] As shown in Figure 1, it is a structural principle block diagram of the present invention. The device of the present invention includes a parallel current sharing module for evenly distributing the current of each branch to the input total constant current, and a constant current control for implementing a constant current to the total current. Module and a shunt used to obtain sampling signals for the total constant current output. Each current sharing module is mainly equipped with a current sampling amplifier circuit, a current limiting resistor and a voltage comparison suppression circuit. The branch constant current input is converted into each branch by the sampling amplifier circuit The voltage signal corresponding to the circuit current, and then connected to the average voltage signal formed on the current sharing bus through the current limiting resistor, the average voltage signal and the output voltage signal of the sampling a...