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Power supply with feedforward control using pulse modulation and demodulation

A pulse modulator and power supply technology, applied in the energy industry, electrical components, sustainable manufacturing/processing, etc., can solve problems such as inconsistency in communication

Active Publication Date: 2021-09-17
ASTEC INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There may be communication between the primary-side digital controller and the secondary-side digital controller, but this communication may not be consistent due to the resource constraints of the digital controller

Method used

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  • Power supply with feedforward control using pulse modulation and demodulation
  • Power supply with feedforward control using pulse modulation and demodulation
  • Power supply with feedforward control using pulse modulation and demodulation

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Embodiment Construction

[0013] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0014] 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 specific details nor example embodiments should be construed to limit the invention. scope. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0015] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used ...

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PUM

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Abstract

An exemplary isolated AC-DC power supply includes a PFC converter coupled to an AC input, a DC-DC converter coupled between the PFC converter and a DC output, and a DC-DC converter configured to control switching operation of the DC-DC converter. controller. A pulse modulator is coupled to the output of the PFC converter to receive a signal representative of a voltage ripple at the output of the PFC converter, and configured to amplitude modulate the pulse signal based on the voltage ripple. A pulse demodulator is coupled to the pulse modulator to receive the modulated pulse signal and is configured to demodulate the modulated pulse signal and provide a demodulated signal to regulate switching operation of the DC-DC converter. A method for controlling an isolated AC-DC power supply is also disclosed.

Description

technical field [0001] The present invention relates to a power supply with feedforward control using pulse modulation and demodulation and a method for controlling the power supply. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] Many isolated power supplies experience AC input dynamic response issues, output dynamic loading issues, line frequency output voltage ripple issues, etc. Feed-forward methods can be used with analog components between the primary and secondary sides of the power supply to reduce voltage ripple problems, but may degrade accuracy due to the range of component parameters. Digital controllers are used more frequently in AC / DC power supplies. In some power supplies, a digital controller is located on the primary side of the power supply to control input housekeeping, power factor correction (Power Factor Correction, PFC) circuit operation, and so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12
CPCH02M7/04H02M3/00H02M1/14H02M3/156H02M7/12Y02P80/10H02M1/007
Inventor 刘青峰邓士杰李广全周召福
Owner ASTEC INT LTD