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

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

Inactive 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 change the size of current i2, so that i1 of each converter 1 and i2 of each converter 1 are equal, that is, positive and negative currents of the same converter 1 are realized. The sum is zero to reduce the circulating current between converter 1.

[0042] Specifically, refer to figure 1 and figure 2, a DCDC circulating current control device, which includes a rectification module 11, a voltage output terminal, a regulation module 12 and a voltage transformation module 13, and the rectification module 11 includes a plurality of rectification units 111. The rectification unit 111 is connected to each phase of the AC source in a one-to-one correspondence. The rectifier units 111 each include an input terminal, a positive output terminal and a negative output terminal, wherein each input terminal is connected to an AC source of each phase, the positive output terminals are coupled to the positiv...

Embodiment 2

[0049] Embodiment two is carried out on the basis of embodiment one, with reference to figure 1 and figure 2 , the regulating module 12 includes a switching tube S0. Wherein the switch tube S0, the rectification unit 111, and the output terminals of the multi-phase AC source 2 are set in a one-to-one correspondence. Each rectification unit 111 includes a diode D1 and a diode D2.

[0050] The cathode of the diode D1 is the positive output terminal of the rectification unit 111, and the positive output terminals of each rectification unit 111 are coupled to the positive output terminal of the rectification module 11, and the anode of the diode D1 is the input terminal of the corresponding rectification unit 111. The output terminals of the source are respectively coupled to the anode of the diode D1; the cathode of the diode D2 is coupled to the anode of the diode D1 in the same rectification unit 111, and the anode of the diode D2 is the negative output terminal of the recti...

Embodiment 3

[0055] Embodiment three is carried out on the basis of embodiment one or embodiment two, with reference to figure 1 , figure 2 and image 3 The voltage transformation module 13 includes at least one first transformation unit 131, and the first transformation unit 131 is connected in series between the rectification module 11 and the voltage output terminal, so as to realize one-stage or multi-stage DC-DC conversion.

[0056] The first transforming unit 131 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 higher than the voltage of the reverse terminal, that is, the control terminal, the forward terminal, and the reverse terminal of the switc...

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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 rectifyingmodule which comprises a rectifying unit corresponding to each phase AC source; a voltage transformation module which is connected between the rectifying module 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 rectifying module is connected to one end of the load R through thevoltage transformation module and the positive electrode interface, the negative output end of the rectifying module is connected to the other 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 of which each adjusting module is connected in series on the negative output end in the corresponding rectifying unit, 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 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): H02M7/217H02M3/158H02M1/32
CPCH02M1/32H02M3/158H02M7/217H02M1/0067
Inventor 李锐李辉梁迢
Owner HANGZHOU ZHONGHEN ELECTRIC CO LTD
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