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Hybrid dc/dc converter and method

A converter and hybrid technology, which is applied in the direction of output power conversion devices, instruments, control/regulation systems, etc., can solve the problem that the current cannot be charged instantaneously, and achieve the effect of reducing switching and conduction losses and improving efficiency

Active Publication Date: 2016-11-30
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After Q1 is disconnected, the primary side current cannot charge instantaneously

Method used

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  • Hybrid dc/dc converter and method
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  • Hybrid dc/dc converter and method

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Embodiment Construction

[0051] The making and using of the presently preferred embodiments are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

[0052] The invention will be described with respect to a preferred embodiment in the specific context, namely a hybrid full bridge converter. However, the present invention is also applicable to a variety of isolated dc / dc converters including half-bridge converters, full-bridge converters, push-pull converters, and the like. Furthermore, the present invention can be applied to power conversion topologies with various control mechanisms such as PWM duty cycle control, symmetrical PWM, asymmetrical PWM, phase shifted PWM, variable frequency PWM control, combination ...

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Abstract

An embodiment hybrid dc / dc converter includes a first power supply and a low power converter coupled to the first power supply. The low power converter produces an output connected in series with the first power supply. The hybrid dc / dc converter further includes: a selection network coupled to the first power supply and the output of the low power converter; and an unregulated main power converter coupled to The select network. By controlling the voltage across the output of the low power converter, the hybrid dc / dc converter can achieve high efficiency with the unregulated power converter.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Serial No. 13 / 307946, entitled "Hybrid DC / DC Converters and Methods," filed Nov. 30, 2011 by Dianbo Fu et al. Priority to earlier patent applications, the contents of which are incorporated herein by reference as if reproduced in full. technical field [0003] The present invention relates to isolated dc / dc converters and methods, and more particularly to isolated dc / dc converters and methods using a first stage and a second stage connected in cascade, wherein the second stage's The output can be adjusted by adjusting the auxiliary power supply of this first stage. Background technique [0004] To serve all types of telecommunication loads, telecommunication network power systems typically include the following conversions: AC-DC stage converting (AC-DC stage converting), i.e., converting power from the AC utility line to a 48V DC distribution bus; and DC-DC stage converting. DC level con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
Inventor 傅电波毛恒春蔡兵
Owner HUAWEI DIGITAL POWER TECH CO LTD