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Low-voltage power supply filter power circuit

A power circuit, low-voltage power supply technology, applied in electrical components, adjusting electrical variables, instruments, etc., can solve problems affecting the service life of electrical appliances, poor stability, complex structure, etc., to achieve easy inspection and maintenance, low cost, and wide application. Effect

Inactive Publication Date: 2018-02-02
CHENGDU JIESHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the low-voltage power supply filter power supply circuit currently used is not only complex in structure, but also poor in stability, it is easy to affect the service life of electrical appliances

Method used

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  • Low-voltage power supply filter power circuit
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Embodiment

[0018] like figure 1 As shown, the low-voltage power supply filter power supply circuit of the present invention is mainly composed of a front constant current source circuit, a transformer T, a diode rectifier U, an operational amplifier P1, a transistor VT1, a transistor VT2, an inductor L, a capacitor C1, a capacitor C2, and a capacitor C3. Capacitor C4, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, diode D1, voltage regulator diode D2 and diode D3. Wherein, the resistance value of the resistor R1 is 300Ω, the resistance values ​​of the resistors R2-R4 are all 260Ω, and the resistance values ​​of the resistors R5 and R6 are both 250Ω. Meanwhile, the capacitor C1 and the capacitor C2 both have a capacitance of 100 μF, the capacitor C3 has a capacitance of 110 μF, and the capacitor C4 has a capacitance of 120 μF. In order to ensure the actual use effect of the present invention, during implementation, the triode VT1 and the triode VT2 are all ...

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PUM

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Abstract

The invention discloses a low-voltage power supply filter power supply circuit, which is characterized in that it mainly consists of a front constant current source circuit, a transformer T, a diode rectifier U, an operational amplifier P1, a triode VT1, a triode VT2, an inductor L, a capacitor C1, and a capacitor C2 , Capacitor C3, capacitor C4, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, diode D1, Zener diode D2 and diode D3. The invention not only has a simple structure, is convenient for inspection and maintenance, but also has low cost and wide applicability. At the same time, it can also adjust when the output voltage fluctuates due to changes in the mains voltage or load current, thereby ensuring the stability of the output power supply. Promotion and use.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a low-voltage power supply filter power supply circuit. Background technique [0002] With the development of science and technology, electronic technology has developed rapidly, and the types of electronic products have become more and more abundant. Various electronic products have entered the families of ordinary people, making people's daily life inseparable from electronic products. At present, most household electricity uses 220V mains power, and low-voltage power supply filter power supply circuit is required for voltage processing for electrical appliances with lower voltage. Because the currently used low-voltage power supply filter power supply circuit is not only complex in structure, but also poor in stability, it is easy to affect the service life of electrical appliances. Contents of the invention [0003] The object of the present invention is to provide a low-voltage p...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M3/158H02M1/14
CPCH02M7/217H02M1/14H02M3/158
Inventor 王丹
Owner CHENGDU JIESHENG TECH CO LTD