Soft start protective power circuit

A soft-start circuit and start-up protection technology, applied in the electronic field, can solve the problems of short service life of components, unfavorable protection of electrical appliances, and large impact of electrical appliances, so as to improve service life, improve safety and stability, and reduce impact Effect

Inactive Publication Date: 2018-05-04
四川新驱科为科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the power supply starts, it will have a greater impact on the electrical appliances, which is not conducive to the protection of the electrical appliances, and will also cause a large load on the various components of the power supply circuit.
Today, the main way to suppress this instantaneous

Method used

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  • Soft start protective power circuit

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Embodiment

[0014] like figure 1 As shown, a soft-start protection power supply circuit includes a transformer T1 whose input terminal is connected to 220V AC, a diode bridge rectifier D1 whose input terminals are connected to the output terminal of the transformer T1, and a bridge rectifier D1 connected to the diode bridge rectifier D1. Overvoltage protection circuit, and a soft start circuit connected with the overvoltage protection circuit.

[0015] The overvoltage protection circuit consists of a one-way thyristor Q5, a fuse F1, a polarized capacitor C2, a Zener diode D3, a resistor R7, and a resistor R12.

[0016] When connecting, the positive pole of the polarity capacitor C2 is connected to the N pole of the one-way thyristor Q5 through the fuse F1, and the negative pole is connected to the N pole of the one-way thyristor Q5, and the P pole of the Zener diode D3 is connected to the control pole of the one-way thyristor Q5, and the N pole is connected to the one-way thyristor Q5 thr...

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PUM

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Abstract

The invention discloses a soft start protective power circuit which comprises a transformer T1 with the input end connected to 220V alternating current, a diode bridge rectifier D1 with the input endconnected with the output end of the transformer T1, an over-voltage protective circuit connected with the diode bridge rectifier D1, and a soft start circuit connected with the over-voltage protective circuit. According to the soft start protective power circuit, during power supply, the power supply electric quantity for electric appliances can be increased step by step, the impact of a power source on power supply of the electric appliances during starting is lowered, the impact on components and parts inside the circuit is lowered, and the effect of protecting the circuit and the electricappliances is well achieved.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a soft-start protection power supply circuit. Background technique [0002] When the power supply starts, it will have a greater impact on the electrical appliances, which is not conducive to the protection of the electrical appliances, and will also cause a greater load on the various components of the power supply circuit. Today, the main way to suppress this instantaneous current impact is to set up a surge protection circuit. This method directly limits the current entering the input capacitor through surge suppression, which has greater requirements for various components. When the service life is short, it is easy to be damaged under the impact of current. In order to improve the service life of components and protect electrical equipment from power circuits, how to design a better power circuit has gradually become the research core of the enterprise. Contents of the inventio...

Claims

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Application Information

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IPC IPC(8): H02H3/20H02H3/087H02M1/36
CPCH02H3/202H02H3/087H02M1/36
Inventor 王前明
Owner 四川新驱科为科技有限公司
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