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Current balancing multiphase power converters, controllers and methods

A converter and controller technology, applied in the direction of DC power input conversion to DC power output, electrical components, circuit devices, etc., can solve problems such as current imbalance

Inactive Publication Date: 2011-11-09
ASTEC INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Differences in the average duty cycle between phases can result in a significant imbalance in the current carried by each phase

Method used

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  • Current balancing multiphase power converters, controllers and methods
  • Current balancing multiphase power converters, controllers and methods
  • Current balancing multiphase power converters, controllers and methods

Examples

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Embodiment Construction

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0021] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth, such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the invention. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the invention. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0022] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "the" m...

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Abstract

A method of controlling a multiphase power converter including a plurality of sub-converters is disclosed. The method includes, for each of the sub-converters, estimating a current provided by that sub-converter. The method includes selecting one of the sub-converters that is on and determined to have a greatest current as the next sub-converter to be turned off and selecting one of the sub-converters that is off and determined to have a smallest current as the next sub-converter to be turned on. Other methods, multiphase power converters and controllers for multiphase power converters are also disclosed.

Description

technical field [0001] The present disclosure relates to current balancing multiphase power converters, controllers for current balancing in multiphase power converters, and methods of controlling multiphase power converters to balance current between phases. Background technique [0002] This section provides background information which is not necessarily prior art related to the present disclosure. [0003] A multiphase power converter includes more than one power converter. The power converters (also called sub-converters) of known multiphase power converters usually operate in a discrete number of phases. A pulse width modulated (PWM) signal is typically generated for phase by comparing a reference voltage to one or more sawtooth waveforms of fixed frequency and fixed amplitude. The timing of turning on and / or turning off the phases is typically controlled by a sawtooth waveform. [0004] Each phase of a multiphase power converter generally has a low output impedance...

Claims

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Application Information

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IPC IPC(8): H02M1/10
CPCH02M3/1584H02J1/10H02J1/102H02M3/158
Inventor 彼得·马尔科夫斯基
Owner ASTEC INT LTD
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