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A periodic self-test switching power supply and its control method

A switching power supply, periodic technology, used in power supply testing, control/regulation systems, electrical components, etc.

Inactive Publication Date: 2020-12-29
ZHEJIANG XIZI HEAVY IND MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In severe cases, the service life of the subsequent electrical devices may even be reduced due to the influence of the output current.

Method used

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  • A periodic self-test switching power supply and its control method
  • A periodic self-test switching power supply and its control method
  • A periodic self-test switching power supply and its control method

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Embodiment Construction

[0019] The above and other embodiments and advantages of the present invention are clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention.

[0020] figure 1 A block diagram of a periodic self-test switching power supply provided by an embodiment of the present invention is shown. In this embodiment, the switching power supply can be connected to the temperature and humidity controller 200 . And it includes a traditional part and an improved part.

[0021] A traditional part is as follows: an input filter circuit 101 , a switch circuit 102 , an output filter circuit 103 , a first current sampling circuit 104 , and a PWM control circuit 105 . This part is delineated by a dashed box in the figure. The input voltage Vin is input from the input filter circuit 101 , and is converted into an output voltage Vout after passing through the switch circuit 10...

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PUM

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Abstract

The invention provides a periodic self-inspection switching power supply and its control method. The switching power supply can be connected to a temperature and humidity controller, including an input filter circuit, a switch circuit, an output filter circuit, a first current sampling circuit, and a PWM Control circuit; the input filter circuit is connected to the input voltage, and the output filter circuit sends out the output voltage; it also includes an output impedance equivalent resistance, a second current sampling circuit, a single-chip microcomputer, a first switch, a second switch, series connection, etc. effective resistance, the third switch, parallel equivalent resistance, and an alarm circuit.

Description

technical field [0001] The invention relates to a switching power supply and a control method thereof, in particular to a switching power supply for periodic self-inspection and a control method thereof. Background technique [0002] Switching power supply is a kind of power supply that uses modern power electronic technology to control the time ratio of switching on and off to maintain a stable output voltage. Switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. At present, switching power supply is widely used in almost all electronic equipment due to its small size, light weight and high efficiency. It is an indispensable power supply method for the rapid development of today's electronic information industry. [0003] When the components in the switching power supply are aging, it is easy to affec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156G01R31/40G01R27/08
CPCG01R27/08G01R31/40H02M3/156H02M1/0009
Inventor 不公告发明人
Owner ZHEJIANG XIZI HEAVY IND MACHINERY