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Input current shaping for transition and discontinuous mode power converter

A power converter, input current technology, applied in the direction of converting DC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc., can solve problems such as increased cost and complexity

Active Publication Date: 2014-03-12
PAI CAPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is the need to sense the average input current over a switching cycle, which adds cost and complexity for control and current sensing

Method used

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  • Input current shaping for transition and discontinuous mode power converter
  • Input current shaping for transition and discontinuous mode power converter
  • Input current shaping for transition and discontinuous mode power converter

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Embodiment Construction

[0017] While making and using various embodiments of the invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein merely illustrate making and using the invention in specific ways and do not delineate the scope of the invention.

[0018] To facilitate understanding of the embodiments described herein, a number of terms are defined below. The terms defined herein have the same meanings as commonly understood by those of ordinary skill in the fields relevant to the present invention. Terms such as "a", "an" and "the" are not intended to refer to only a single entity, but include the general genus to which the particular example for illustration belongs. The terminology used herein is used to describe particular embodiments of the invention, but their usage does not delineate the invention, except a...

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Abstract

A power converter (920) operable to draw an input current that is in phase with an input voltage (140) of the power converter and proportional to a voltage of the input voltage of the power converter includes a drive switch (44), a waveform generator (126) and a current shaping circuit (120). The drive switch is connected between an input inductor and ground and draws current through the input inductor when turned on. The current shaping circuit provides an on-time of the drive switch for a next cycle of the drive switch as a function of an input current decay time, a switching period of the waveform generator, and an output voltage of the power converter.

Description

technical field [0001] The present invention generally relates to power factor correction power converters operating in transition or discontinuous mode. More particularly, the present invention relates to reducing total harmonic distortion and input current phase variation in such power converters. Background technique [0002] Transition mode power converters have the desired property that the current through the inductor returns to zero after each switching cycle in order to allow zero current and zero voltage switching of the main switch. Although theoretically the current of a power converter operating in a transition mode with a constant on-duration switching scheme is always proportional to and in phase with the input voltage, practical limitations degrade the performance, which will in some result in unacceptable total harmonic distortion (THD) values ​​in the application. [0003] One reason for the deviation from theoretical best behavior is that many transition-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42G05F1/70H02M3/158
CPCH02M1/4225H02M3/156Y02B70/126Y02B70/10H02M1/42H02M1/12H02M3/158G05F1/70
Inventor S.齐格勒I.菲诺
Owner PAI CAPITAL
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