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 specifically designed to present a low impedance at its resonance frequency. This feature allows the component to more effectively attenuate electromagnetic disturbances at targeted frequencies, especially those generated by circuits operating at fixed switching or clock frequencies. Unlike conventional capacitors, the resonance frequency of the piezoelectric element can be tailored to match the spectral peaks of EMI in the application, enabling more selective and efficient suppression.

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

• Incorporated into power supply filters (mains filters) to reduce EMI in industrial or consumer electronics.
• Employed as X or Y capacitors in switching power supplies, converters, or inverters to target and suppress specific EMI frequencies.
• Used in circuits with fixed-frequency clocks or switching elements, such as digital circuits, motor drives, and power electronic devices, to comply with regulatory EMI limits.
• Integration in electric devices requiring robust EMI filtering, such as medical equipment or communication devices.
• Tailored manufacturing for custom electronics where EMI disturbance spectra are well-defined.

BenefitsContent extracted from patent full text and abstract with AI.

• Provides highly selective EMI attenuation at desired resonance frequencies, improving effectiveness over conventional passive filters.
• Reduces the number and/or size of conventional capacitors or inductors needed for EMI suppression, saving space and potentially reducing costs.
• Can be custom-engineered to target multiple frequencies by designing the piezoelectric element accordingly, allowing suppression of multiple EMI peaks with fewer components.
• Exhibits excellent insulation and high breakdown voltage due to properties of piezoelectric materials, broadening its applicability in high-voltage environments.
• Enables compliance with regulatory EMI limits, particularly in frequency bands above 150 kHz where standards are most stringent.
• Improved temperature stability if used in combination with ceramic oscillators made from similar materials, ensuring consistent EMI suppression performance.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

Provided is an EMI suppression component (10) which comprises a piezoelectric element (12) that is configured to provide a low impedance propagation path for electromagnetic disturbances at a resonance frequency of the piezoelectric element (12).