Power supply device having wide input adaptability

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 ...

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

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