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Flyback switching power supply and power supply system

A switching power supply and flyback technology, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., can solve the problems of effective voltage reduction, electromagnetic interference, etc., to maintain voltage output, reduce the influence of electromagnetic interference, and stabilize The effect of voltage output

Pending Publication Date: 2018-05-01
成都广泰威达数控技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing flyback switching power supply has the influence of electromagnetic interference, and the disadvantage that the effective voltage decreases when the load is too large

Method used

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  • Flyback switching power supply and power supply system
  • Flyback switching power supply and power supply system
  • Flyback switching power supply and power supply system

Examples

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Effect test

no. 1 example

[0026] see figure 1 , the first embodiment of the present invention provides a power supply system 10 , and the power supply system 10 includes: a flyback switching power supply 100 , an external power supply 11 and a load 12 .

[0027] The external power supply 11 is connected to the flyback switching power supply 100 , and the flyback switching power supply 100 is connected to the load 12 . Optionally, the external power supply 11 is a common civilian or industrial AC output line, and the load 12 is a common type of electrical equipment, such as a refrigerator, a TV, or an air conditioner.

no. 2 example

[0029] see figure 2 , image 3 and Figure 4 , the second embodiment of the present invention provides a flyback switching power supply 100 . The flyback switching power supply 100 includes: a control module 110 , a detection module and a transformer 130 .

[0030] The control module 110 is connected to one end of the primary side winding of the transformer 130, and is used to control the primary side winding to generate a corresponding first pulse signal according to the current frequency within a preset frequency range, wherein the The current frequency fluctuates periodically within the preset frequency range. Therefore, EMI (Electromagnetic Interference, electromagnetic interference) emission is distributed in a wide frequency range, which can effectively reduce EMI, which effectively reduces the possibility of other internal components of the flyback switching power supply 100 being interfered and the impact of the driver on other external electrical appliances. .

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PUM

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Abstract

The embodiment of the invention provides a flyback switching power supply and a power supply system. The flyback switching power supply comprises a control module, a monitoring module and a transformer, wherein the control module is connected with one end of a primary-side winding of the transformer and is used for controlling the primary-side winding to generate a corresponding first pulse signalaccording to a current frequency within a preset frequency range, the current frequency periodically fluctuates within the preset frequency range, and the monitoring module is connected with the control module and is used for sampling the first pulse signal by the control module and sending the obtained sampling signal to a power management chip. By the flyback switching power supply, electromagnetic interference generated by a power supply circuit can be effectively reduced, the structure is small and is easy to maintain, a voltage can be adjusted according to a real-time load, and the situation that a power supply voltage is reduced due to overload is prevented.

Description

technical field [0001] The invention relates to the manufacture and field of electronic equipment, in particular to a flyback switching power supply and a power supply system. Background technique [0002] Due to its simple circuit, the existing flyback switching power supply can efficiently provide multiple DC outputs, and has high conversion efficiency and low loss. Moreover, the transformer turns ratio is small. The most important thing is that when the input voltage fluctuates in a large range, it can still have a relatively stable output. At present, the AC input can be realized between 85 and 265V. Requirements for stable output without switching. Therefore, the flyback switching power supply is widely loved by the manufacturing industry. However, the existing flyback switching power supply has the influence of electromagnetic interference and the disadvantage that the effective voltage decreases when the load is too large. Contents of the invention [0003] The o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/44H02M1/08H02M1/32H02M1/12H02H7/12
CPCH02H7/1213H02M1/08H02M1/126H02M1/32H02M1/44H02M3/33515H02M3/33523H02M1/123
Inventor 颜明华邓桥松
Owner 成都广泰威达数控技术股份有限公司
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