Temperature measuring device applied to cable accessories, power taking module and switching power supply circuit thereof

Abstract

The invention discloses a temperature measuring device applied to a cable accessory and a power taking module thereof, and a switching power supply circuit, which relates to the technical field of cable connector performance detection, comprising an energy storage element coupled to a voltage input terminal for storing electric energy obtained from the voltage input terminal; A control module, connected in parallel with the energy storage element, for controlling the control pole of the thyristor D1 to be turned on and off; A thyristor D1 having a control pole coupled to the control module andan anode coupled to a voltage input terminal; A current-voltage energy storage module coupled to a cathode and a voltage output terminal of the thyristor D1 for buffering output voltages and currents; A charge-discharge cycle of the energy storage element enables the voltage output terminal to output the buck oscillation voltage; In the switching power supply circuit, the energy storage element and the voltage stabilizing diode D2 are arranged in parallel, so that the output voltage can be reduced, and the stability of supplying power to the load can be improved.

Description

technical field [0001] The invention relates to the technical field of cable joint performance detection, more specifically, it relates to a temperature measuring device applied to cable accessories, a power-taking module, and a switching power supply circuit. Background technique [0002] With the improvement of urban construction level, all kinds of cables are required to go through underground channels, so more and more distribution network power supply lines use cable power supply. As the utilization rate of cables increases, the number of faults generated by cables is also increasing, and cable faults will directly affect the power supply of users and bring great social impact. One-third of the number of cable failures is caused by quality problems with cable accessories. [0003] The quality problems of cable accessories mainly include insulation problems, poor contact, etc., but the phenomenon is that the interior of the cable accessories installation part gradually ...

AI Technical Summary

Problems solved by technology

However, in the process of taking power, the voltage is generally high and the current is small. When the voltage output from the output terminal of the rectifier circuit is directly input into the charging capacitor, the charging capacitor is easily broken down, resulting in failure to supply power to the load.

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