A kind of series voltage equalization control method and device

A technology of series voltage equalization and control method, which is applied in the field of power supply, can solve problems such as susceptibility to interference, complex and unstable analog circuit lines, and achieve the effect of avoiding the influence of user load, sufficient redundancy, and ensuring stability

Active Publication Date: 2020-01-07
SICHUAN INJET ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are many ways to control the serial output. Some use the master-slave mode, and use a single master to control multiple slave modules at the same time. Once the master fails, the entire system will be in a standby state; there are also analog circuits For interconnection control, but the analog circuit circuit is complex, there are many connections, and it is easy to be interfered, etc., the system is complex and unstable

Method used

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  • A kind of series voltage equalization control method and device
  • A kind of series voltage equalization control method and device
  • A kind of series voltage equalization control method and device

Examples

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no. 1 example

[0034] An embodiment of the present invention provides a series voltage equalization control method, which is applied to a first power module and used to control the output voltage of the series power system 100 . It should be noted that, in the embodiment of the present invention, any one power module 110 among the plurality of power modules 110 is used as the first power module, and all other power modules 110 are the second power modules.

[0035] see figure 2 , is a flowchart of a method for controlling voltage equalization in series provided by an embodiment of the present invention. The series voltage equalization control method includes:

[0036] Step S201: Collect sampled values ​​of circuit parameters of the first power module.

[0037] The sampled value of the circuit parameter includes, but not limited to, the sampled value of the output current of the first power module, the sampled value of the first output voltage, and the like.

[0038] Step S202: Calculate ...

no. 2 example

[0061] see image 3 , image 3 A series voltage equalization control method provided by a preferred embodiment of the present invention. It should be noted that the basic principles and technical effects of the series voltage equalization control method provided in this embodiment are the same as those of the above-mentioned embodiments. corresponding content in the example. The series voltage equalization control method includes:

[0062] Step S301: Collect the sampled value of the output current of the first power module.

[0063] Step S302: Calculating a first voltage equalization given value as an output value of a current regulator according to the sampled output current value and a preset current reference value.

[0064] Step S303: Receive a second given amount of voltage equalization transmitted by a plurality of second power supply modules.

[0065] Step S304: Determine a third voltage equalization given amount based on the output of the current regulator, multip...

no. 3 example

[0073] see Figure 4 , Figure 4 A series voltage equalization control device 200 provided for a preferred embodiment of the present invention. It should be noted that the basic principles and technical effects of the series voltage equalization control device 200 provided in this embodiment are the same as those of the above-mentioned embodiments. Corresponding content in the embodiment. The series voltage equalization control device 200 includes: a circuit parameter acquisition unit 210 , a receiving unit 230 , a calculation unit 220 , a third given voltage equalization determination unit 240 , an update unit 250 , an adjustment unit 260 and a transmission unit 270 .

[0074] The circuit parameter acquisition unit 210 is configured to acquire circuit parameter sample values ​​of the first power module, and the circuit parameter sample values ​​include first output voltage sample values.

[0075] It can be understood that, in a preferred embodiment, the circuit parameter a...

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Abstract

Embodiments of the present invention provide a series voltage equalization control method and device, which relate to the technical field of power supplies. The method and device firstly calculate the first voltage equalization given amount according to the circuit parameter information and the preset circuit parameter reference value, and then based on the output of the current regulator and the second voltage equalized value transmitted by the plurality of second power supply modules. Quantitatively determine the third given amount of voltage equalization, and then adjust the output voltage of the first power module based on the third given amount of voltage equalization and the sampled value of the first output voltage, thereby realizing the voltage equalization control of multiple power modules. There is no master-slave relationship between them, so when any power module exits or joins in series, it can re-determine the new first voltage equalization setting quickly, thereby fully weakening the fluctuation of the system output when the power module is put in or cut out, A new stable state is reached in a short period of time, which improves the stability and sufficient redundancy of the system.

Description

technical field [0001] The present invention relates to the technical field of power supplies, in particular to a series voltage equalization control method and device. Background technique [0002] High-power high-frequency switching power supply is limited by devices such as IGBT power tubes and high-frequency transformers. At the same time, it needs to be miniaturized, and the switching frequency needs to be high. The power of a single module power supply is generally not too large. In some occasions, it is necessary to provide a relatively high DC voltage. Considering the versatility of each module, the output voltage level and power of the module have been determined during the module design. In this case, multiple modules need to be connected in series to increase the output power. , and at the same time reach the output voltage of the system, and the module series connection needs to consider that the output voltage of each module is equal, so as to ensure the balance...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M3/00
Inventor康智斌刘有成
OwnerSICHUAN INJET ELECTRIC CO LTD