Hiccup type protection circuits for DC power supply

A DC power supply and protection circuit technology, applied in the field of power supply, can solve problems such as failure to adapt to load requirements, reduced reliability, and the need for artificial restarts

Active Publication Date: 2016-10-19
胡爽珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is to say, it will not restore the power supply by itself, and needs to be manually restarted, which will cause inconvenience to the application
2. Current-limiting type: Set a maximum value of the output current. Once the load current reaches this maximum value, the current will no longer be increased, and the output voltage will drop, which will lead to an increase in the internal power consumption of the power supply. Larger, increased heat generation, lower energy efficiency and lower reliability
Its defect is that there is a larg...

Method used

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  • Hiccup type protection circuits for DC power supply
  • Hiccup type protection circuits for DC power supply

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Embodiment Construction

[0007] Below in conjunction with embodiment further explain accompanying drawing and illustrate the invention of the present invention.

[0008] figure 1 It is an embodiment of the hiccup protection circuit of the present invention. This circuit can be regarded as a four-terminal network. The input terminals of this four-terminal network are (A1) and (B1), where (A1) is connected to the positive pole of the protected DC power supply , (B1) is terminated with the negative pole of the protected DC power supply and serves as the reference zero potential of the circuit. The output terminals of this four-terminal network are (A2), (B2), where (A2) terminal is the positive pole of the output, and (B2) is the negative pole of the output. The load is connected to both ends of (A2) and (B2).

[0009] Narrate first figure 1 The specific design of the circuit. figure 1 The N1 and N2 components in the model are TL431, which are three-terminal adjustable precision voltage references. T...

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Abstract

The invention provides two hiccup type protection circuits for a DC power supply, wherein the hiccup type protection circuits belong to the technical field of power supplies. The hiccup type protection circuits are suitable for overcurrent protection in a DC power supply. The existing protection circuit of the power supply product has many troubles or requires artificial restart, or a relatively long time lag exits in protection, thereby causing power supply damage, etc. The invention provides two new circuit designs. The circuit is a four-pole network. The input end of the four-pole network is connected with the anode and the cathode of the protected DC power supply, and the output end is connected with a load. The hiccup type protection circuit performs hiccup type protection on the protected DC power supply, wherein the hiccup type protection has advantages of high action speed, high speed in automatic recovery, adjustable protected time length, low effect by ambient temperature, low power consumption, simple circuit structure and low cost. Experiments prove a fact that the hiccup type protection circuits can totally overcome defects in the existing protection circuit of the power supply product.

Description

technical field [0001] The invention relates to two types of hiccup protection circuits for DC power supplies, belonging to the technical field of power supplies. It is suitable for overcurrent protection in DC power supplies, whether it is a DC power supply using switching power supply technology or power frequency transformer step-down technology. Background technique [0002] When the DC power supply is working, the load is aggravated or the output end is short-circuited due to load changes, careless use, etc., so that the output current is too large and damaged. Adding a protection circuit should be an important part of the design of the power supply. [0003] At present, there are roughly three protection modes for DC power supplies: cut-off type, current-limiting type, and overheating type. 1. Cut-off type: When the output of the DC power supply is overloaded or short-circuited, the power supply will be turned off and no longer supply power to the load. It requires a...

Claims

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Application Information

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IPC IPC(8): H02H7/10H02H3/06
Inventor 何曙光
Owner 胡爽珍
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