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DCDC circulation control device and control method, electronic equipment and medium

A circulating current control and control terminal technology, applied in the field of converters, can solve the problems of unequal positive and negative currents, converter damage, and uneven heating of the converter, and achieve the effect of reducing circulating current and reducing the probability of device damage.

Active Publication Date: 2019-10-08
HANGZHOU ZHONGHEN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The power modules in the prior art can use non-isolated DCDC converters, and these converters are connected in parallel to form a power system. However, when such converters are connected in parallel, there will be a circulating current between the converters, which will lead to positive Negative currents are not equal, so that each converter is heated unevenly, which easily leads to damage to the converter

Method used

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  • DCDC circulation control device and control method, electronic equipment and medium
  • DCDC circulation control device and control method, electronic equipment and medium
  • DCDC circulation control device and control method, electronic equipment and medium

Examples

Experimental program
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Embodiment 1

[0041] Embodiment 1 provides a DCDC circulating current control device, which can make the i1 of each converter 1 equal and the i2 of each converter 1 equal through the current equalization control and adjustment module 3, and realize the difference between the positive and negative currents of the same converter 1. and zero to reduce the circulating current between converter 1.

[0042] Specifically, refer to figure 1 , a DCDC circulating current control device, which includes a load R and a converter 1, and there are N converters 1, where N is greater than or equal to 2, and the converter 1 is connected to a DC source 4 and connected in series to both ends of the load R, wherein the converter Each switch 1 includes a power input terminal, a voltage output terminal, an adjustment module 3 and a voltage transformation module 2.

[0043] The input terminal of the power supply has a positive input terminal and a negative input terminal, and the input terminal of the power suppl...

Embodiment 2

[0049] Embodiment two is carried out on the basis of embodiment one, with reference to figure 1 and figure 2 , wherein the DC source 4 can be set as a DC power supply, or can be set as a combination of an AC power supply 41 and a rectification module 42 . The rectification module 42 can be provided in one-to-one correspondence with the number of converters 1, wherein the rectification module 42 is connected between the AC power supply 41 and the transformer module 2, and the rectification module 42 is used to rectify and output the AC power output by the AC power supply 41 direct current.

[0050] Wherein the AC power supply 41 can be set as multi-phase AC power or unidirectional AC power, figure 2 The AC power supply 41 shown in the figure is set as three-phase AC power, and the rectification module 42 may include three rectification units, and each rectification unit corresponds to each phase of AC power. The rectification units each include a diode D1 and a diode D2. T...

Embodiment 3

[0055] Embodiment three is carried out on the basis of embodiment one or embodiment two, specific reference figure 1 , figure 2 image 3 as well as Figure 4 , wherein the voltage transformation module 2 includes a first transformation unit 21, x number of first transformation units 21 can be provided, and x is greater than or equal to 1, and the first transformation unit 21 is serially connected in series between the power supply input end and the voltage output end , so as to realize one-stage or multi-stage DC-DC conversion.

[0056] refer to Figure 4 , the first transformation unit 21 includes an inductor L1, a switch tube S1, a diode D7, and a capacitor C1.

[0057] The switch tube S1 can be any one of MOSFET, IGBT, GaN, and triode, and is preferably a depletion N-MOSFET. The switch tube S1 has a control terminal, a forward terminal, and a reverse terminal. The control terminal is connected to the PWM width adjustment device. The voltage of the forward terminal is ...

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Abstract

The invention relates to the technical field of converters, and discloses a DCDC circulation control device which comprises a load R and at least two converters. Each converter comprises a power supply input end which is connected with a DC source and receives the voltage required to be transformed and formed by the DC source;; a voltage transformation module which is connected between the power supply input end and a voltage output end; the voltage output end which comprises a positive electrode interface and a negative electrode interface, wherein the positive output end of the power supplyinput end is connected to one end of the load R through the voltage transformation module and the positive electrode interface, the negative input end of the power supply input end is connected to theother end of the load R through the voltage transformation module and the negative electrode interface, the current flowing through the positive electrode interface is set as i1 and the current flowing through the negative electrode interface is set as i2; and adjusting modules which are connected in series on the negative output end of the voltage transformation module, and the i1 of different converters is equal and the i2 of different converters is equal through current sharing control and the adjusting modules. The invention also provides a DCDC circulation control method, electronic equipment and a computer readable storage medium.

Description

technical field [0001] The invention relates to the technical field of converters, in particular to a DCDC circulation control device, a control method, electronic equipment and a medium. Background technique [0002] If a DC voltage can be converted into other DC voltages (such as converting 3.0V to 1.5V or 5.0V) through a converter, we call this converter a DCDC converter, or a switching power supply or a switching regulator. . Because large-scale equipment often requires a large-capacity DC power supply. However, the power capacity of a single power supply component is limited, and a distributed power supply system is usually used when a large-capacity power supply is required. A distributed power system is a large-capacity power system composed of several small-capacity power modules. [0003] Theoretically speaking, the distributed power system can be composed in series, parallel, and mixed series and parallel. However, in practical applications, the output current o...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M1/32H02M7/217
CPCH02M1/32H02M3/158H02M7/217H02M1/0067
Inventor 李锐代辉金辉
Owner HANGZHOU ZHONGHEN ELECTRIC CO LTD
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