Electromagnetic Interference Suppression Components

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes an electromagnetic interference (EMI) suppression component that utilizes a piezoelectric element engineered to provide a low impedance (thus strong attenuation) path for electromagnetic disturbances specifically at its resonance frequency. By tuning the piezoelectric element's resonance to match peaks in unwanted EMI frequencies of electronic circuits, the component achieves superior, targeted disturbance suppression compared to conventional capacitors.

Use CasesContent extracted from patent full text and abstract with AI.

• Suppression of EMI in switching power supplies and converters operating at fixed frequencies
• Use in digital circuits and motor drives to reduce electromagnetic interference
• Replacement or supplementation of X-capacitors and Y-capacitors in mains filters for power electronics
• Enhanced EMI filtration in applications where regulatory standards must be met above certain frequencies (e.g., above 150 kHz)
• Integration with circuits that employ ceramic oscillators for synchronized frequency behavior and thermal stability
• Attenuation of specific spectral peaks of electromagnetic noise in consumer electronics, industrial systems, and automotive electronics

BenefitsContent extracted from patent full text and abstract with AI.

• Improved, selective attenuation of EMI by targeting spectral peaks through resonance tuning
• Ability to suppress multiple disturbance peaks with a single component by incorporating multiple resonance frequencies
• Potential reduction in size, number, and cost of EMI suppression components compared to conventional designs
• High insulation and breakdown-voltage properties provided by piezoelectric materials, enabling use in high-voltage environments
• Versatility to function as both X- and Y-capacitors, supporting both differential and common mode noise suppression
• Enhanced compliance with EMI regulations, particularly in frequency bands subject to regulatory testing
• Reduced impact of temperature changes on frequency alignment when integrated with similarly constructed ceramic oscillators

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

Provided is an EMI suppression component10, wherein the EMI suppression component10comprises a piezoelectric element12that is configured to provide a low impedance propagation path for electromagnetic disturbances at a resonance frequency of the piezoelectric element12.