Unlock instant, AI-driven research and patent intelligence for your innovation.

An interleaved parallel dc-dc converter and its control method

A DC-DC and converter technology, applied in the field of interleaved parallel DC-DC converters and their control, can solve the problems such as the decrease of the saturation characteristic of the inductor core, the failure of current limiting, the decrease of the load capacity of the converter, and the saving of saturation. Reduced features, flexible design, easy-to-implement effects

Active Publication Date: 2020-03-10
EATON INTELLIGENT POWER LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above two methods will introduce a new problem, that is, the decrease of the saturation characteristic of the inductor core, which will lead to the difficulty in the design of current limiting protection, the decrease of the load capacity of the converter, and even the failure of current limiting in severe cases. thereby damaging the converter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An interleaved parallel dc-dc converter and its control method
  • An interleaved parallel dc-dc converter and its control method
  • An interleaved parallel dc-dc converter and its control method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] image 3 It is a structural schematic diagram of the interleaved parallel DC-DC converter according to the first embodiment of the present invention. Such as image 3 As shown, the interleaved parallel DC-DC converter converts the DC voltage (V L ) to transform and provide an output voltage (V H ). It includes a first capacitor Cd, a second capacitor Cf, a first DC-DC converter and a second DC-DC converter, the second capacitor Cf is connected to both ends of the rechargeable battery, and the first DC-DC The output terminals of the converter and the second DC-DC converter are connected to both ends of the first capacitor Cd, and the first DC-DC converter includes a first inductor L1a, a first diode D1_1 and a second two The pole transistor D1_2 and the first switch transistor T1 connected in antiparallel with the second diode D1_2, the cathode of the first diode D1_1 is operatively connected to the positive end of the first capacitor Cd, the first diode D1_1 The an...

no. 2 example

[0052] Transform the interleaved parallel DC-DC boost converter of the first embodiment to obtain an interleaved parallel DC-DC step-down converter, and its specific structure is as follows Figure 7 shown. The interleaved parallel DC-DC converter of this embodiment includes a first capacitor Cd, a second capacitor Cf, a first DC-DC converter and a second DC-DC converter, and the second capacitor Cf is connected to the rechargeable battery Both ends, the input ends of the first DC-DC converter and the second DC-DC converter are connected to both ends of the first capacitor Cd, and the first DC-DC converter includes a first inductor L1a, The first diode D1_1, the second diode D1_2 and the third switch tube T1_1 connected in antiparallel with the first diode D1_2, the cathode of the first diode D1_1 is operatively connected to the second capacitor Cd The anode of the first diode D1_1 is connected to the cathode of the second diode D1_2 and has node 21, and the anode of the seco...

no. 3 example

[0056] Figure 8 A schematic structural diagram of an interleaved parallel DC-DC converter according to a third embodiment of the present invention is shown. The interleaved parallel DC-DC converter of this embodiment is based on the interleaved parallel DC-DC converter of the first embodiment, and the third The switch tube T1_1 and the fourth switch tube T2_1 can realize the bidirectional flow of energy, thereby realizing the interleaved parallel bidirectional Boost / Buck converter.

[0057] Wherein, when the third switching tube T1_1 and the fourth switching tube T2_1 are turned off, their structure is similar to that of the first embodiment, when the PWM signal is alternately applied to the first switching tube T1 and the second switching tube T2 through the control circuit When the step-up conversion is realized; when the first switching tube T1 and the second switching tube T2 are disconnected, its structure is similar to that of the second embodiment, when the third swit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an interleaved parallel DC-DC converter, which comprises a first DC-DC converter with a first inductor, a second DC-DC converter with a second inductor, a third inductor, a first capacitor group and a rechargeable battery, wherein the first inductor and the second inductor form a coupled inductor; the third inductor is a monomer inductor; and magnetic cores of the coupled inductor and the monomer inductor are properly configured. The interleaved parallel DC-DC converter can solve the problem that the inductor magnetic core saturation characteristic falls while the efficiency of the power converter is improved in the most economical mode, the design is flexible, and realization is easy.

Description

technical field [0001] The invention belongs to the field of power conversion equipment, and in particular relates to an interleaved parallel DC-DC converter and a control method thereof. Background technique [0002] In the design of commercial power converters, how to balance efficiency and cost has always been the focus of attention. On the one hand, it is the development of new materials and new devices, such as the development of new technology for devices, the invention of new semiconductor materials and magnetic core materials, etc.; Another aspect is the invention of new topology technology and control methods. In terms of DC-DC converters, the interleaved parallel converter has been widely used in the industry due to its good balance between efficiency and cost. Its general circuit diagram is as follows: figure 1 As shown, it includes a first DC-DC converter and a second DC-DC converter connected in parallel. By controlling the signal to make the two parallel bran...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/14H02M1/32
Inventor 曹磊汪黎莉郑大为
Owner EATON INTELLIGENT POWER LTD