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Low pass filtering inversion system based on capacitance feedback three-point oscillation circuit

A technology of oscillating circuit and capacitive feedback, which is applied in the field of electronics, can solve problems such as unstable voltage and frequency, and achieve the effect of stable voltage and frequency, good stability, and simple structure

Inactive Publication Date: 2015-08-12
CHENGDU CHUANGTU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of unstable voltage and frequency output by the current inverter, and provide a low-pass filter inverter system based on a three-point oscillator circuit with capacitive feedback

Method used

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  • Low pass filtering inversion system based on capacitance feedback three-point oscillation circuit
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Embodiment

[0021] Such as figure 1 As shown, the present invention consists of a transformer T1, an inverter circuit, a logic control circuit connected to the inverter circuit, a low-pass filter circuit connected to the primary side of the transformer T1, and a circuit board arranged between the logic control circuit and the low-pass filter circuit It is composed of a phase-shifting processing circuit, and a capacitive feedback three-point oscillation circuit connected in series between the phase-shifting processing circuit and the low-pass filter circuit.

[0022] The phase-shifting processing circuit is composed of a phase-shifting chip U1, a transistor VT4, a transistor VT5, a resistor R6, a resistor R7, a resistor R8, a potentiometer R9, a polar capacitor C1, a polar capacitor C2, a polar capacitor C3, a diode D5 and Diode D.

[0023] Among them, one end of the resistor R7 is connected to the VCC+ pin of the phase-shifting chip U1, and the other end is connected to the IN1 pin of th...

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PUM

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Abstract

The invention discloses a low pass filtering inversion system based on a capacitance feedback three-point oscillation circuit; the low pass filtering inversion system comprises a transformer T1, an inversion circuit, a logic control circuit connected with the inversion circuit, a low pass filtering circuit connected with a primary side of the transformer T1, and a phase shift processing circuit arranged between the logic control circuit and the low pass filtering circuit; the features are that the capacitance feedback three-point oscillation circuit is also connected in series between the phase shift processing circuit and the low pass filtering circuit; the capacitance feedback three-point oscillation circuit enables the inversion system to output more stable voltage frequency, thus protecting electric appliances, and the electric appliances can more smoothly work.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a low-pass filter inverter system based on a capacitive feedback three-point oscillation circuit. Background technique [0002] Inverters convert DC power into AC power. It is widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVD, VCD, computers, TVs, washing machines, range hoods, refrigerators, VCRs, massagers, fans, lighting, etc. In foreign countries, due to the high penetration rate of automobiles, the inverter can be used to connect the battery to drive electrical appliances and various tools to work when going out to work or travel. Connect household appliances to the output of the power converter to use various appliances in the car. [0003] However, when an inverter is used, the frequency of the output voltage is not stable, and it is easy to damage the electrical equipment. Contents of the invention [0004] The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/537H02M1/12
CPCH02M1/12H02M7/537
Inventor 周云扬
Owner CHENGDU CHUANGTU TECH
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