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Low-delay adaptive bidirectional DCDC converter and control method thereof

A control method and converter technology, applied in control/regulation systems, output power conversion devices, DC power input conversion to DC power output, etc. problems, to achieve the effect of optimizing the overall design, shortening the work process, and improving the switching speed

Active Publication Date: 2020-05-08
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to overcome the technical problems of traditional bidirectional DC / DC converter circuit sampling process complexity, long process, slow circuit switching speed, low power efficiency and inability to perform multi-directional output, and provides a low-delay self-adaptive bidirectional DCDC The converter and its control method achieve the purpose of bidirectional conversion through two anti-parallel DCDC converters, and a DCDC converter is assisted in parallel to simplify the circuit, and use the hardware detection method of the voltage drop of the logic circuit to simplify the detection switching process, improve work speed, and enable multiple output

Method used

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  • Low-delay adaptive bidirectional DCDC converter and control method thereof
  • Low-delay adaptive bidirectional DCDC converter and control method thereof
  • Low-delay adaptive bidirectional DCDC converter and control method thereof

Examples

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Embodiment 1

[0033] Embodiment 1: A low-delay adaptive bidirectional DCDC converter of this embodiment, such as figure 1 As shown, it includes a voltage source 1, a first DCDC conversion unit 2, a second DCDC conversion unit 3, a third DCDC conversion unit 4, a first external circuit 5 and a second external circuit 6, and the voltage source 1 is connected to the cathode of the diode D1 connected to one end of the second DCDC conversion unit 3, the anode of the diode D1 is connected to one end of the first DCDC conversion unit 2, the other end of the second DCDC conversion unit 3 is connected to the anode of the diode D2, and the first DCDC conversion unit The other end of 2, one is connected to the cathode of diode D2, the other is connected to the first external circuit 5, and the other is connected to one end of the third DCDC conversion unit 4, and the other end of the third DCDC conversion unit 4 is connected to the second external circuit 6, the voltage source 1 provides the driving v...

Embodiment 2

[0038] Embodiment 2: A low-delay adaptive bidirectional DCDC converter of this embodiment, such as Figure 4 As shown, the second DCDC conversion unit 3 is an isolated converter, including a converter primary side circuit and a converter secondary side circuit, the two are connected through a transformer T, and the converter secondary side circuit includes an inductor L2, a diode D4, The power switch tube S2, the resistor RL and the capacitor Cf, one end of the inductor L2 is connected to the positive pole of the diode D4, the series circuit of the inductor L2 and the diode D4 is connected in parallel with the series circuit of the inductor L1 and the diode D3, the negative pole of the diode D4 is connected to the output voltage Vou2 A capacitor Cf and a resistor RL are connected in parallel between the negative poles, a power switch tube S2 is connected between the negative pole of the diode D4 and the negative pole of the output voltage Vou2, the drain of the power switch tub...

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Abstract

The invention discloses a low-delay self-adaptive bidirectional DCDC converter and a control method thereof. The low-delay adaptive bidirectional DCDC converter comprises a voltage source, a first DCDC conversion unit, a second DCDC conversion unit, a third DCDC conversion unit, a first external circuit and a second external circuit, wherein the voltage source is connected with the first externalcircuit through a diode D1 and the first DCDC conversion unit, and is connected with the first external circuit through the second DCDC conversion unit and a diode D2, and the third DCDC conversion unit is connected with the second external circuit and the first DCDC conversion unit. According to the control method, the conduction state of the diode is automatically changed according to the voltage on the outer side of the DCDC converter, and the automatic on-off of the DCDC module is effectively achieved. According to the invention, the purpose of bidirectional conversion is achieved throughthe two DCDC conversion units which are reversely connected in parallel, one DCDC conversion unit is connected in parallel in an auxiliary manner, the hardware detection mode of logic circuit voltagedrop is utilized, the circuit and detection switching processes are simplified, the working speed is improved, and multi-path output can be realized.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a low-delay self-adaptive bidirectional DC-DC converter and a control method thereof. Background technique [0002] DC / DC conversion is a working mode in which the original direct current is controlled by adjusting its PWM (duty cycle) to control the magnitude of the output effective voltage. [0003] The bidirectional DC / DC converter has the advantages of bidirectional flow of energy, simple control method, and compact topology. These advantages make it have broad application prospects, but the existing bidirectional DC / DC converters have slow detection mode detection speed, complicated switching process, slow switching speed, bidirectional DC / DC converter cannot perform multiple outputs, and bidirectional DC / DC The shortcomings of DC converters that cannot be differentiated design have brought many problems to our design and daily use. [0004] At present, DCDC conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M1/007H02M1/009
Inventor 姚建锋丁鸿张磊王嘉曦朱雪松周平李正明杨小东韩磊朱开成
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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