Circuit for realizing autonomous equalizing current of parallel electric source module

A technology of power module and parallel connection, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc. It can solve the problems of reduced product reliability, complicated circuits, and large power consumption, and achieve simple circuits, good current sharing effects, and high power consumption. The effect of low consumption

Inactive Publication Date: 2006-06-14
ASTEC POWER SUPPLY (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used parallel current sharing method is implemented by using a chip for current sharing inside the module or using a current sharing circuit outside the module. The cost is high, the circuit is complicated, the product reliability is reduced, and the power consumption is relatively large.

Method used

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  • Circuit for realizing autonomous equalizing current of parallel electric source module
  • Circuit for realizing autonomous equalizing current of parallel electric source module
  • Circuit for realizing autonomous equalizing current of parallel electric source module

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 5 As shown, the current sampling resistor Rs is connected in series to the negative phase output terminal Vo- of the power module, behind the output filter capacitor C1, and its low voltage terminal is connected to the negative phase output terminal Vo- of the power module. The voltage control loop 3 includes a first operational amplifier U1, a second operational amplifier U2, a first voltage dividing resistor Ra, a second voltage dividing resistor Rb, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, the fifth resistor R5 and the reference regulator UZ. After the first voltage dividing resistor Ra and the second voltage dividing resistor Rb are connected in series, one end is connected to the positive phase output terminal Vo+ of the power module, and the other end is connected to the negative phase output terminal Vo− of the power module. The positive-phase input terminal of the first operational amplifier U1 is...

Embodiment 2

[0036] Such as Image 6As shown, the current sampling resistor Rs is connected in series to the negative phase output terminal Vo- of the power module, located between the output filter capacitors C1 and C2, and its low voltage terminal is connected to the negative phase output terminal Vo- of the power module. The voltage control loop 3 includes a first operational amplifier U1, a first voltage dividing resistor Ra, a second voltage dividing resistor Rb, a first resistor R1, a fifth resistor R5, a sixth resistor R6 and a reference regulator UZ. After the first voltage dividing resistor Ra and the second voltage dividing resistor Rb are connected in series, one end is connected to the positive phase output terminal Vo+ of the power module, and the other end is connected to the negative phase output terminal Vo− of the power module. The non-inverting input terminal of the first operational amplifier U1 is connected to the cathode of the reference voltage regulator UZ through th...

Embodiment 3

[0042] Such as Figure 7 As shown, the current sampling resistor Rs is connected in series to the negative phase output terminal Vo- of the power module, located between the output filter capacitors C1 and C2, and its low voltage terminal is connected to the negative phase output terminal Vo- of the power module. The voltage control loop 3 includes a first operational amplifier U1, a first voltage dividing resistor Ra, a second voltage dividing resistor Rb, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a reference regulator tube Uz. After the first voltage dividing resistor Ra and the second voltage dividing resistor Rb are connected in series, one end is connected to the positive phase output terminal Vo+ of the power module, and the other end is connected to the negative phase output terminal Vo− of the module. The non-inverting input terminal of the first operational amplifier U1 is connected to the negative pole of the referenc...

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PUM

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Abstract

The invention relates to a circuit for realizing automatic current equalization of a parallel power supply module, comprising: a voltage control loop used to feed the output voltage of the power supply module back to a power supply module control circuit; a current sampling unit, connected in series on a power supply output loop to sample the output currents of the power supply module. And the voltage control loop is also used to convert the output current of the power supply module into a voltage signal and feed the voltage signal to the power supply module control circuit so as to control the output voltage of the power supply module to change with its output current. The circuit of the invention can realize soft output property of the power supply and achieve automatic current equalizing ability, and has the advantages of low system cost, simple circuit, low power consumption, good current equalizing effect, ability to assure power supply reliability, and good effect on a high voltage output module.

Description

[technical field] [0001] The invention relates to a circuit for realizing independent current sharing of parallel power supply modules, which is especially suitable for relatively high output voltage, a certain range of variation allowed for the output voltage, relatively high output precision requirements for power supplies, and relatively good consistency requirements for each power supply. Parallel communication module power supply. [Background technique] [0002] At present, communication module power supplies are often used in parallel to increase the load capacity. The commonly used parallel current sharing method is implemented by using a chip for current sharing inside the module or using a current sharing circuit outside the module. The cost is high, the circuit is complicated, the product reliability is reduced, and the power consumption is relatively large. [Content of the invention] [0003] The purpose of the present invention is to provide a circuit that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/10
Inventor 向志强丁峰
Owner ASTEC POWER SUPPLY (SHENZHEN) CO LTD
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