Safety resistor with temperature control function

Abstract

The invention discloses a safety resistor with a temperature control function. The safety resistor comprises a safety resistor body and a temperature control mechanism, the safety resistor body comprises a metal shell, the inlet end of the metal shell is connected with a contact wire, the contact wire is sleeved with a ceramic bushing, a telescopic spring is mounted on each of two sides of the front end of the bushing, the bottoms of the telescopic springs are spirally embedded into ceramic, the other end of the telescopic spring is connected with a conductive gasket, the back of the conductive gasket is tightly stuck to the top of the contact wire, a contact electrode is attached to the front end of the conductive gasket, a barrel-shaped spring is stuck to the back of the contact electrode, the temperature control mechanism comprises a temperature sensing body, one side of the temperature sensing body is attached to the barrel-shaped spring, the other side of the temperature sensing body is stuck with an output electrode, a digital temperature sensor is stuck to the upper surface of the temperature sensing body, and the output end of the digital temperature sensor is connected with a patch type singlechip. The safety resistor can increase temperature control, freely set the power-off temperature and restore after cooling, and has high control precision.

Description

technical field [0001] The invention relates to the technical field of fuse resistors, in particular to a fuse resistor with temperature control. Background technique [0002] Under normal circumstances, the fuse resistor has the function of an ordinary resistor. Once the circuit fails and exceeds its rated power, it will disconnect the circuit within a specified time, so as to protect other components. When a short-circuit fault occurs in the circuit load and an overcurrent occurs, the temperature of the insurance resistor will rise to 500-600°C in a short period of time. The purpose of machine security. However, most of the existing insurance resistors are nonlinear structures, the fusing temperature is not fixed, and the operation accuracy is low, which often affects the safety of the overall structure in some precision devices. Contents of the invention [0003] In view of the above problems, the present invention provides a safety resistor with temperature control, ...

AI Technical Summary

Problems solved by technology

However, most of the existing insurance resistors are nonlinear structures, the fusing temperature is not fixed, and the operation accuracy is low, which often affects the safety of the overall structure in some precision devices.

Images