Three-phase program controlled power source and power amplifier tube short-circuiting protective circuit thereof

A short-circuit protection circuit, power amplifier tube technology, applied in emergency protection circuit devices, protection against overcurrent, electrical components, etc., can solve the problem of inability to short-circuit protection of power amplifier tubes

Active Publication Date: 2013-11-20
SHENZHEN XINGLONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power amplifier tube short-circuit protection circuit, aiming to solve the problem in the prior art that the power amplifier tube cannot be comprehensively short-circuit protected

Method used

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  • Three-phase program controlled power source and power amplifier tube short-circuiting protective circuit thereof
  • Three-phase program controlled power source and power amplifier tube short-circuiting protective circuit thereof

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] figure 1 The block diagram of the power tube short-circuit protection circuit provided by the embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0016] The power amplifier tube short-circuit protection circuit 100 is connected to the power amplifier tube U1, the power supply 200, and the reference voltage source 300. The power amplifier tube short-circuit protection circuit 100 includes:

[0017] Sampling resistor R1, the first terminal is connected t...

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Abstract

The invention belongs to the field of electric power engineering and provides a three-phase program controlled power source and a power amplifier tube short-circuiting protective circuit thereof. In the invention, the power amplifier tube short-circuiting protective circuit which comprises a sample resistance, an operational amplifier unit, a comparing unit and a switch unit is used for detecting short-circuiting currents of a negative power source input end of a power amplifier tube and correspondingly controlling the working condition of the power amplifier tube according to a detection result, and therefore, when the power amplifier tube is short-circuited, the power amplifier tube short-circuit protective circuit can rapidly control the power amplifier tube to stop working, effectively protects the power amplifier tube from being damaged due to the short-circuiting fault and solves the problem that the prior art can not carry out comprehensive short-circuiting protection on the power amplifier tube.

Description

technical field [0001] The invention belongs to the field of electric power engineering, and in particular relates to a three-phase program-controlled power source and a short-circuit protection circuit for a power amplifier tube thereof. Background technique [0002] In the power amplifier circuit, the power amplifier tube is an essential and important part. If the power amplifier tube is short-circuited due to misoperation in practical applications, the entire power amplifier circuit will not work properly. [0003] In view of the above-mentioned problems caused by the short circuit of the power amplifier tube, the prior art provides a protection circuit for the power amplifier tube, which uses a diode to clamp the output voltage of the power amplifier tube, thereby implementing short circuit protection for the power amplifier tube. However, due to the slow response speed of the prior art, it can only protect the power amplifier tube when the short-circuit current is small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/20H02H3/08
Inventor 陈钢黄建钟黄清乐陈汉新
Owner SHENZHEN XINGLONG TECH
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