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Vehicle-mounted power supply device and direct current-direct current converter thereof

A technology of a DC converter and a conversion circuit, which is applied in the direction of conversion devices and instruments that convert DC power input into DC power output and output power, to achieve the effect of improving conversion efficiency

Active Publication Date: 2012-07-11
SHINRY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no isolated DC-DC power conversion main circuit whose power conversion efficiency can reach 98%-99%.

Method used

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  • Vehicle-mounted power supply device and direct current-direct current converter thereof
  • Vehicle-mounted power supply device and direct current-direct current converter thereof
  • Vehicle-mounted power supply device and direct current-direct current converter thereof

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Embodiment Construction

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0015] In the embodiment of the present invention, the input terminal of the DC-DC converter obtains the input voltage from the power factor correction (PFC) conversion circuit, and outputs the voltage to the load terminal at the output terminal, and feeds energy back to the input terminal at the same time, so that the output efficiency can be improved .

[0016] see figure 1 , which is a schematic structural diagram of the DC-DC converter 100 provided in the firs...

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Abstract

The embodiment of the invention discloses a direct current-direct current converter which comprises an input stage, an output stage and at least one energy feedback stage, wherein the input stage comprises a first anode and a first cathode; the first anode is used for receiving an input voltage; the output stage comprises a second anode and a third anode; the second anode is coupled with the first anode and is used for outputting an output voltage according to the input voltage; the energy feedback stage is coupled between the input stage and the third anode and is used for feeding local energy outputted by the output stage to the first anode; and the input voltage of the input stage is equal to the sum of the output voltage of the output stage and the voltage of the third anode. The invention also provides a vehicle-mounted power supply device using the direct current-direct current converter. The power conversion efficiency of the direct current-direct current converter is increased, so that the efficiency of the vehicle-mounted power supply device is also increased.

Description

technical field [0001] The invention relates to a power supply device, in particular to a vehicle power supply device and a DC-DC converter thereof. Background technique [0002] The existing on-board chargers are almost all isolated type, and the efficiency is about 90%-93%. Due to the large amount of heat generated, forced cooling measures must be taken. In the water cooling mode and air cooling mode, noise and friction exist, and the actual service life of the fan is not long, which will further shorten the life of the whole car. Therefore, the two conventional cooling methods (air cooling and water cooling) of on-board chargers are not the most practical cooling methods. Practice has proved that the natural air cooling operation of the on-board charger is the most practical cooling method. However, in order to achieve natural air-cooled operation, the overall power conversion efficiency of the on-board charger must be increased to more than 96%. [0003] Existing on-b...

Claims

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Application Information

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IPC IPC(8): H02M3/00
Inventor 胡峻凡胡定高莫光铖郑向红吴壬华
Owner SHINRY TECH