EMIS Releases Three Phase Filter Series for EMI Mitigation

In high-voltage, high-current applications, electrical noise can reduce system performance, leading to inefficiencies, malfunctions, and premature component failure. Engineers and system designers often struggle with mitigating electromagnetic interference (EMI) created by electrical noise while maintaining optimal power flow. To address this challenge, EMIS has introduced the TMF3333 high-current three phase EMI filter, designed to effectively suppress unwanted electrical noise without compromising system efficiency.

The EMIS TMF3333 is designed to attenuate and suppress noise for three-phase high-voltage current, even when high levels of interference exist. Image used courtesy of EMIS

TMF3333 Three Phase EMI Filter

The new TMF3333 three phase EMI filter is built to handle maximum system current without overheating or causing excessive voltage drop. Its low thermal resistance and integrated high-temperature resistant materials ensure minimal heating effects to increase system stability. The filter is designed for integration into power drive systems and motors and employs multiple stages to filter noise while accommodating large currents efficiently.

EMIS’ TMF3333 features a chassis-mounted design with bus bar connecting terminals. It operates within a voltage range of 520/760 VAC, a frequency range of 50/60 Hz, and is available in current ratings from 150 to 2500 A. The filter also offers an optional protective cover for enhanced safety and durability.

The TMF3333 effectively reduces both common-mode and differential-mode noise by offering broad attenuation across the frequency range. Additionally, the TMF3333HV variant supports high-voltage applications (up to 520 VAC continuous), expanding its versatility for demanding power environments.

Automated systems are particularly vulnerable to electrical noise, which can cause information and signal disruptions. Image used courtesy of Adobe Stock

Electromagnetic Interference in Automation

One key place the TMF3333 excels is in the field of industrial automation, where uninterrupted power is critical to maintaining efficiency and precision. Automated systems require clean power without much electrical noise because electrical noise can interfere with systems signals and lead to malfunctions in control systems on top of overall system efficiency degradation.

The TMF3333 filter helps to prevent system malfunctions and errors in automated processes by reducing EMI. This ensures the smooth operation of robotic systems, conveyor belts, and precision manufacturing tools. Similarly, in wind turbines, where power conversion is essential, the TMF3333 minimizes interference that could disrupt the control systems, improving the overall energy output and reliability of wind energy farms.

In commercial buildings and large-scale infrastructure, power fluctuations caused by EMI can lead to inefficiencies and increased energy costs. Integrating the TMF3333 into building automation systems ensures stable voltage regulation, reducing the risk of unexpected downtime and enhancing operational lifespans. Energy conversion devices, such as inverters and frequency converters, also benefit from the TMF3333's noise attenuation properties, leading to improved power conversion efficiency and lower heat generation.

EMI Mitigation

The TMF3333 is designed to maintain clean power delivery in order to extend the lifespan of connected components, minimize the likelihood of costly repairs, and ensure compliance with stringent electromagnetic compatibility standards. EMIS expects users to have improved equipment reliability, reduced maintenance costs, and greater efficiency by integrating the TMF3333 EMI filter into their systems.