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Frequency shaking cycle control method and related device

A period control and period value technology, applied in the control/regulation system, output power conversion device, DC power input conversion to DC power output, etc., can solve the problems of abnormal PWM wave generation and power supply equipment damage, and avoid power generation The effect of wave anomalies

Active Publication Date: 2022-03-08
SHENZHEN WINLINE TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the period value of the PWM signal emitted by Pulse Width Modulation (PWM) is generally updated to realize the periodic change of the frequency of the internal switch tube and then achieve the "frequency shaking" effect, but at present, it is possible to update the PWM period value There are cases where the period values ​​of multiple PWMs are not updated in the same period, resulting in abnormal PWM waves, which may easily cause damage to power supply equipment

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  • Frequency shaking cycle control method and related device
  • Frequency shaking cycle control method and related device
  • Frequency shaking cycle control method and related device

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0024] The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method...

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Abstract

The present application provides a frequency shaking cycle control method and related devices, the method is applied to a switching power supply circuit, and the switching power supply circuit includes a controller, a multi-channel pulse width modulation PWM control circuit and a plurality of primary side control switch tubes, The controller is connected to the multi-channel pulse width modulation PWM control circuit, and the multi-channel pulse width modulation PWM control circuit is connected to the plurality of primary side control switch tubes, and the method includes: obtaining the multi-channel pulse width modulation The period value PRD of the PWM control circuit; determine whether the period value PRD needs to be updated; if the period value PRD needs to be updated, then determine whether there is at least one carrier counter of the PWM whose value is greater than the preset value; if there is at least one When the value of the PWM carrier counter is greater than a preset value, the period value PRD is updated. Through the above method, abnormal wave generation can be avoided, and related power supply equipment can be protected.

Description

technical field [0001] The application belongs to the field of switching power supply circuit control, and in particular relates to a frequency shaking cycle control method and a related device. Background technique [0002] At present, the period value of the PWM signal emitted by Pulse Width Modulation (PWM) is generally updated to realize the periodic change of the frequency of the internal switch tube and then achieve the "frequency shaking" effect, but at present, it is possible to update the PWM period value There is a situation that the period values ​​of multiple PWMs are not updated in the same period, resulting in abnormal PWM waves, which may easily cause damage to power supply equipment. Contents of the invention [0003] The present application provides a frequency shaking period control method and a related device, in order to avoid abnormal wave generation and protect related power supply equipment. [0004] In the first aspect, the embodiment of the presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088H02M1/32H02M3/335
CPCH02M1/088H02M1/32H02M3/3353H02M3/33515
Inventor 谢谦张煌玉李晨光张凯旋张宇星陈余金邓智伟朱建国
Owner SHENZHEN WINLINE TECH