Power supply device having wide input adaptability

A technology of adaptability and power supply device, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve problems such as narrow working range, power supply damage, etc., to avoid switching oscillation, ultra-wide Input voltage adaptability and the effect of increasing the input operating voltage range

Pending Publication Date: 2016-05-04
STATE GRID QINGHAI ELECTRIC POWER CO HAINAN POWER SUPPLY CO +3
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the operating range of most power supplies is relatively narrow. The input voltage range of conventional power supplies is mostly ±20% of the rated voltage, and some special power supplies can only reach ±30% of the rated voltage even if they have a wide input adaptability. capability, but these power supplies are still unable to meet the severe voltage fluctuations when they are used such as overhead lightning protection ground wires, and it is easy to cause power supply damage

Method used

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  • Power supply device having wide input adaptability

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] This example figure 1 As shown, a power supply device with wide dynamic input adaptability includes a transformer. The primary side L1 of the transformer is used to connect the input voltage source. The secondary side includes a secondary winding L3 and a secondary winding L2. The secondary winding L2 is connected to the primary side The transformation ratio of L1 is 1:1, the transformation ratio between the secondary winding L3 and the primary side L1 is X:1, and the value of X is an integer greater than 1; X=4 in this embodiment, that is, the secondary winding L3 The transformation ratio with the primary side L1 is 4:1.

[0020] The output terminal of the secondary winding L3 is connected to the micro-trigger thyristor circuit through the rectifier BD2, the output terminal of the secondary winding L2 is connected to the rectifier BD1, and also...

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Abstract

The invention discloses a power supply device having wide input adaptability. The input working voltage range is expanded by automatic switching of high-voltage and low-voltage secondary windings of a transformer; the switching oscillation is prevented through controlling power supply switching by a controller with return difference; static equilibrium is achieved by trigger resistors connected in series and ordinary RC dynamic balance is combined to solve the problem of overvoltage damage caused by partial voltage unbalance of silicon controlled rectifiers connected in series; and a high-power field effect transistor and a voltage stabilization diode form millisecond parallel voltage-limiting protection, transformation isolation and ordinary millisecond transient protection are combined to form complete protection for lightening and switching overvoltage of electricity from a ground line of a power transmission line. By the power supply device, the ultrawide input voltage adaptability of a power supply is achieved, and adverse influence caused by the power supply cannot be generated.

Description

technical field [0001] The invention belongs to the electrical field, and in particular relates to a power supply device with wide dynamic input adaptability. Background technique [0002] With the rapid development of the national economy, various online monitoring devices are used more and more widely. In some special environments, it is difficult for monitoring equipment to obtain electrical energy from the mains, and it is necessary to obtain energy from the surrounding equipment through some special means, and the output voltage of this type of energy is extremely unstable, and the range can vary from a few volts to hundreds of volts Voltages such as energy drawn from overhead ground wires of transmission lines are characterized by this. [0003] And in order to obtain energy from this energy source, the power system we adopt must have a wide dynamic input adaptation range. At present, the operating range of most power supplies is relatively narrow. The input voltage ...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M1/32
CPCH02M1/32H02M7/217
Inventor 唐永文杨明彬樊海峰贺岺张仲秋贺顺生黄秦军魏娜粱泉忠程小平
Owner STATE GRID QINGHAI ELECTRIC POWER CO HAINAN POWER SUPPLY CO
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