![]() ![]() Industrial equipment, motors, medical devices, and test equipment rely on three-phase EMI filters for robust noise suppression in industrial applications. Common applications include small electronics and appliances, food service equipment, and more. Small industrial and residential equipment rely on single-phase EMI filters to prevent noise. These filters protect against EMI damage while ensuring that consumer electronics meet electromagnetic compatibility standards. EMI filters for consumer electronics subdue electromagnetic noise for numerous household devices, such as washing machines, treadmills, and other appliances. It is essential to consider the application when choosing the correct EMI filter to prevent interference and produce the expected results. Common causes include television transmissions, electric motors and generators, radio and satellite, and more.Ī variety of applications depend on EMI filters for uninterrupted function. Industrial EMI produces ambient electromagnetic energy, which can interfere with local power grids, medical devices, and military operations. Industrial EMI can cause lasting and significant interference in essential electronics and may result in large-scale impacts. Some residential sources of EMI include cellular phones, microwaves, electric blankets, laptops, and more. Appliances and wireless devices used by the typical consumer generate this type of interference. ![]() Residential EMI typically disrupts or degrades signal without causing permanent damage to electronics. This type of interference is often known as atmospheric noise.ĮMI is caused by both residential and industrial sectors. Modern electronics are resilient to natural EMI, but older RF communications equipment may experience interference. Natural EMI results from natural events such as electrical storms, solar radiation, rainstorms, and snowstorms. Thermal agitation, which refers to electrons moving through a circuit resistor, produces EMI within electronic devices. Equipment such as transmitters, igniters, power lines, electrical collectors, and generators produce a significant amount of EMI, which can degrade device operations. High-frequency noise is an unavoidable by-product of electronic technology. There are three types of EMI sources, and they include: As more electronics power on, electrical noise becomes more prevalent. If there is only a short length of wire between the filter and the noise source, the EMI filter alone may suffice.Ī variety of sources produce EMI, and the presence of EMI grows as the use of various technologies increases. Radiated interference is especially a concern when there is a significant length of conductor between the filter and the interference source. Since EMI filters are only capable of diverting conducted interference, the devices are often combined with shielding and insulation components to block radiated noise that travels through the air. Once blocked, the low impedance path provided by the capacitor component directs the noise back into the power supply or a grounded connection. ![]() The inductor component allows low-frequency and DC currents to pass through uninhibited and blocks high-frequency current (i.e., the noise). They consist of passive electrical components-including inductors and capacitors-that, when assembled together, form a complete LC circuit. In simplest terms, within such equipment, they act as low-pass filters for unwanted-generally high-frequency-current. Our electromagnetic, power line, signal line, HEMP, and TEMPEST filters are guaranteed to offer reliable performance for their entire working life, which is why we have thousands of satisfied customers across the military, aerospace, commercial, and industrial sectors.ĮMI filters exist as separate or integrated devices in electrical and electronic equipment. Having successfully completed over 10,000 custom filter designs to date, with many of them proving more cost-effective than catalog items, we’ve demonstrated ourselves as one of the leading suppliers of custom EMI filters. Higher ranges are also available upon request. We accommodate custom filter designs with voltage ratings between 0 to 400 VDC and 0 to 480 VAC, current ratings between 0 to 400 A, and frequencies up to 400 Hz. Our services include design and analysis of the filter circuit, design and layout of the packaging, prototyping, and testing, all of which are optimized to deliver the highest quality at the best possible price. We provide full-service custom solutions, offering customer support from project concept to project completion. Fortunately, as experts in electromagnetic interference filtration, we have the knowledge and skills to design and build custom EMI filters to meet unique needs. Our team fully understands that an off-the-shelf solution may not be right for every customer. Custom EMI Filters From Captor Corporation ![]()
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