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Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function

A resonant circuit and overcurrent protection technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of common and affecting circuit safety, etc., and achieve the effect of simple and clear principle, convenient application, and device solution

Active Publication Date: 2012-10-03
SHENZHEN LONGOOD INTELLIGENT ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a bridge-type LC resonant circuit with an overcurrent protection function, which solves the problem that the upper and lower switch tubes are common and affect the safety of the circuit when it is in the zero-current turn-on mode in the prior art.

Method used

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  • Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function
  • Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function
  • Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] see figure 1 and figure 2 , the prior art resonant circuit of the present invention,

[0026] figure 1 It is a half-bridge structure, and the bus voltage utilization rate of this method is 50%. That is, VO≤0.5VIN

[0027] figure 2 It is a full-bridge structure, and the bus voltage utilization rate of this method is 100%. That is, VO≤VIN

[0028] When these two circuits work in a resonant state, the inductor L1\capacitor C1\capacitor C2\capacitor C3 ...

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Abstract

The invention provides a bridge type LC (inductance capacitance) resonance circuit with an overcurrent protection function. The bridge type LC resonance circuit comprises a switch circuit unit, a resonance circuit unit and an overcurrent protection unit, wherein the switch circuit unit is used for controlling the on-off state of driving signals of external loads, the resonance circuit unit is connected with the switch circuit unit and is used for generating high voltage, the overcurrent protection unit is connected with the switch circuit unit and the resonance circuit unit and is used for sampling current output by the switch circuit unit, and the switch circuit unit is forcibly switched off when the current is excessive. The bridge type LC resonance circuit with the overcurrent protection function is implemented in a zero-current switch-on mode, the circuit is protected, and simplicity and convenience are realized.

Description

technical field [0001] The invention relates to the field of circuit protection, in particular to a bridge-type LC resonant circuit with an overcurrent protection function. Background technique [0002] In a circuit containing capacitance and inductance, if the capacitance and inductance are connected in parallel, it may appear in a small period of time: the voltage of the capacitance gradually increases, while the current gradually decreases; at the same time, the current of the inductance gradually increases, The voltage across the inductor decreases gradually. And in another small period of time: the voltage of the capacitor gradually decreases, while the current gradually increases; at the same time, the current of the inductor gradually decreases, and the voltage of the inductor gradually increases. The increase of the voltage can reach a positive maximum value, and the decrease of the voltage can also reach a negative maximum value. The direction of the current will a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/20
Inventor 吴伟廖序
Owner SHENZHEN LONGOOD INTELLIGENT ELECTRIC
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