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Method for operating a power converter in a soft-switching range

A technology of power converter and switch, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, instruments, etc.

Inactive Publication Date: 2011-12-07
SMA SOLAR TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the DAB and TAB converter structures described above, the voltage cancellation method is complicated to implement, for example, due to the use of look-up tables

Method used

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  • Method for operating a power converter in a soft-switching range
  • Method for operating a power converter in a soft-switching range
  • Method for operating a power converter in a soft-switching range

Examples

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Embodiment Construction

[0034] figure 1 An embodiment of a dual active bridge power converter 10 according to the invention is shown. The power converter 10 includes: a first port 20 including port terminals 21 and 22 ; a first bridge circuit 30 including switches 31 - 34 and nodes 35 , 36 . The transformer 40 of the power converter 10 includes a first number of turns N 1 The first winding 41 and has a second number of turns N 2 The second winding 43. The power converter 10 further includes: a second bridge circuit 50 including switches 51 - 54 and nodes 55 , 56 ; and a second port 60 including port terminals 61 and 62 .

[0035] A power source 70 may be coupled to port terminals 21 and 22 . In operation, the source voltage V s Applied to port terminals 21 and 22. Load 80 may be coupled to port terminals 61 and 62 . In operation, the load voltage V 1 May be present between port terminals 61 and 62. Also, in operation, the first rectangular pulse wave voltage V w1 may be presented between n...

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PUM

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Abstract

For converting a first DC voltage to a second DC voltage, a first bridge circuit comprised in a power converter is controlled to convert the first DC voltage to a first AC voltage. The first AC voltage is transformed to a second and possibly further AC voltage. The second and each possibly further AC voltage is converted to a DC voltage by respective bridge circuits. To increase efficiency of the power converter switches of the power converter are controlled to operate in soft switching. Thereto a duty cycle of each AC voltage is controlled. In an embodiment, a half-cycle voltage-time integral of each AC voltage is controlled to be substantially equal.

Description

technical field [0001] The present invention relates to a method of operating a power converter in a soft switching range and to a power converter configured to operate in a soft switching range. Background technique [0002] Power converters are known in the art to be used to supply power from a power source to a load, where specific characteristics of the power source are incompatible with specific characteristics of the load, such as rated voltage and operating voltage, respectively. [0003] For DC / DC conversion, a Dual Active Bridge (DAB) converter is known. The DAB converter converts a DC voltage of a power source coupled to a first port to an AC voltage using a first active bridge. This AC voltage is transferred to the second active bridge using an electromagnetic coupling device such as a transformer. A second active bridge converts the AC voltage to a DC voltage. The DC voltage is provided to a second port of the power converter. In this way, the power converter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584
Inventor H·陶A·科特索波洛斯J·L·杜阿特M·A·M·亨德里克斯
Owner SMA SOLAR TECH AG
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