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Double-power-supply seamless switching circuit

A technology of dual power switching and seamless switching, which is applied to circuit devices, emergency power arrangements, electrical components, etc., can solve the problems of slow switching speed and high power consumption, and achieve fast switching speed, low circuit loss and high reliability Effect

Pending Publication Date: 2019-07-12
南京海兴电网技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-way power switching method often adopts the relay switching method, and the relay coil resistance is about 1KΩ, so the relay switching method consumes a lot of power and the switching speed is slow

Method used

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Embodiment Construction

[0011] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Such as figure 1 As shown, the dual power supply seamless switching circuit of the present invention includes a capacitor step-down circuit and a dual power supply switching circuit. The dual power switching circuit supplies power, and the dual power switching circuit is used for seamlessly switching the two ACs and setting priorities.

[0013] The capacitive step-down circuit includes a logic circuit and a low-voltage regulated source circuit, and the logic circuit performs half-wave rectification on the two-way alternating current to provide low-voltage direct current for the low-voltage regulated source circuit.

[0014] The logic circuit includes a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; the first AC (L1, N) Through the first capacito...

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PUM

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Abstract

The invention discloses a double-power-supply seamless switching circuit which comprises a capacitive step-down circuit and a power supply switching circuit. Two paths of AC power supply are connectedto the capacitive step-down circuit, an AC signal is stepped down and rectified into a low-voltage signal source to supply power to the subsequent power supply switching circuit, and the power supplyswitching circuit realizes seamless switching between two paths of AC and sets the priority. The thyristor double-power-supply circuit uses a thyristor to switch two paths of AC; the thyristor is sensitive in control, realizes microsecond-level connection and disconnection, and is high is switching speed and low in circuit loss; and compared with a relay scheme in the market, the switching speedand reliability are higher.

Description

technical field [0001] The invention belongs to the technical field of power distribution automation, and in particular relates to a dual power supply seamless switching circuit. Background technique [0002] In the distribution network industry, the device is powered by taking power from both sides of the switch on the pole, and the device has strict requirements on the reliability and stability of the power supply. The two-way power supply switching method often adopts the relay switching method, and the relay coil resistance is about 1KΩ, so the relay switching method consumes a lot of power and the switching speed is slow. Contents of the invention [0003] Purpose of the invention: In view of the above problems, the present invention proposes a dual power supply seamless switching circuit, which can reliably and seamlessly switch between two alternating currents. [0004] Technical solution: In order to achieve the purpose of the present invention, the technical solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCH02J9/06
Inventor 李广亮王丽杰吕鹏马金涛
Owner 南京海兴电网技术有限公司