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Pyroelectric Circuit Breaker

IP.com Disclosure Number: IPCOM000247093D
Publication Date: 2016-Aug-04
Document File: 4 page(s) / 109K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a generic design and an exemplary structure for a novel type of circuit breaker that employs the pyroelectric effect as a means of improving the current generation of circuit breakers and accommodating high-speed applications with increased sensitivity.

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Title

Pyroelectric Circuit Breaker

Abstract

Disclosed is a generic design and an exemplary structure for a novel type of circuit breaker that employs the pyroelectric effect as a means of improving the current generation of circuit breakers and accommodating high-speed applications with increased sensitivity.

Problem

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt the current flow.

The current generation of circuit breakers requires improvement in order to suit high speed application and increase sensitivity without hampering costs and form factor. Multiple kinds of circuit breakers are known in commercial art; however, none employs the pyroelectric effect as described herein.

Solution/Novel Contribution

The novel contribution is a generic design and an exemplary structure for a novel type of circuit breaker that employs the pyroelectric effect as a means of improving the current generation of circuit breakers and accommodating high-speed applications with increased sensitivity.

A non-sacrificial fuse wire is designed to respond to an increase in current with an increase in heating. A pyroelectric capacitor produces a current in response to an increase in temperature, which controls an electrical switch. When the current crosses a critical threshold in response to an increase in temperature due to high current in the fuse wire, the switch flips, cutting off the supply. As the temperature drops again, the pyroelectric capacitor generates a current and flips the switch on again, to the closed state, allowing the passage of electricity.

The novel design comprises a structure operating as a circuit breaker to provide protection to a critical device, comprising:


• Non-sacrificial fuse wire

• A pyroelectric capacitor placed in vicinity of the non-sacrificial fuse wire
• An electrical/electronic flip connected to the main supply and to fuse wire

The above components are also inter-connected such that the pyroelectric capacitor responds to a change in temperature in the vicinity of a non-sacrificial fuse wire. The non-sacrificial fuse wire is designed with specific dimensions to respond with certain temperature change(s) in response to change(s) in the current through it.

The current-produced pyroelectric capacitor controls the flip switch, which switches between a closed and an open state in response to temperature change. The


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pyroelectric capacitor is designed to produce a certain amount of current is response to certain change in temperature. The flip switch is designed to switch state only when controlling current produced when the pyroelectric capacitor is above a certain threshold. The system can also employ further complex circuitry to enhance the efficiency of response. (Refer the circuit of pyroelectric temperature sensor.)

Method/Process

Fo...