ITG Electronics, Inc., a supplier of passive components for over 50 years, has announced the introduction of an extensive line of custom and specification specific EMI filters for both commercial as well as military applications. By combining the Filters with its already broad offering of high reliability/ high performance Inductors and Transformers that ITG currently … [Read more...]
Measuring Common Mode Versus Differential Mode Conducted Emissions
When faced with excessive conducted emissions from switching power supplies, one of the first things to investigate and to determine the adequacy of is the power line filter. Line-powered switching supplies generally have both common mode and differential mode sections of the filter as shown in the generalized schematic in Figure 1. When using a line impedance … [Read more...]
Update to EMI Filter Selection Simulator Available
Murata Manufacturing Co., Ltd. is offering an update to their EMI filter selection software. The software simulates effects of Murata EMI Filters and Chip Capacitors based on specified conditions. Function This can be done easily by using the mouse on your Windows interface. The results of simulation are shown in the charts of "Voltage-waveform" and … [Read more...]
Miniaturized LC Filters for EMI Suppression Available
TDK Corporation presents the MEM1005PP251T – a new LC filter for EMI suppression. With dimensions of just 1.0 mm x 0.5 mm x 0.35 mm the filters are ideally suited for use in smartphones and base stations. Volume production began in March 2017. The usual method for suppressing interference in the communication frequency bands of smart phones and other devices is to use … [Read more...]
High-Voltage DC Filters for Power-Hungry Applications
With the unprecedented number of sophisticated equipment systems being integrated into critical civil and defence facilities such as communications hubs, control rooms, emergency response centres, datacentres, banks, stock markets and finance houses, power requirements have increased significantly, and so nowadays it is not uncommon to find high-voltage applications demanding … [Read more...]
Robust Capacitors Suitable for EMI Suppression in Input Filters
TDK Corporation has a new series of robust EPCOS MKP X2 capacitors for EMI suppression. Compared with conventional X2 capacitors designed for rated voltages of 305V AC, these new components offer a higher rated voltage of 350VAC. This makes them suitable for EMI suppression in input filters – specifically for applications on the North American market – and output filters of … [Read more...]
T-Filters, Transmission Lines and EMC
Have you ever had a signal integrity issue that did not have its toll on EMC? If you did then you should consider yourself lucky to have avoided this nightmare. I. Situation: An I2S bus master clock driver is set to 12.288MHz and run at 3.3V. Drive strength is at 50-Ohms. Rise time is at 2ns. Fall time is at 2ns. The driver is located on the “master board” and the bus … [Read more...]
Mitigating EMI Issues In Servo Motors and Variable Frequency Drives
Servo motors and variable frequency drives are wide-spread in the industry. Industrial automation cannot be imagined without these motors. This article deals with certain EMI-related issues inherent to these motors, specifically high-frequency drive signals. Background Servo motors and VFD are typically comprised of two parts - the motor itself and a controller (also … [Read more...]
New 250A HEMP Filter Released
Historically within its range of HEMP protection filters, MPE has offered 200A and 400A variants to address powerline applications. However it has become apparent, particularly in the US defence and homeland security marketplace, that there are many applications which call for 225A as a requirement. To address this with an MPE filter would have previously meant either … [Read more...]
Sine Wave Filter with EMC Output Filter
Schaffner's new FN530 Sine Wave Filter with EMC Output Filter eliminates premature motor damage caused by high dv/dt, overvoltages, cable ringing, motor overheating and eddy current losses in industrial applications. Suitable for motor from 1.5 to 7.5 kW and from 4-16 A, with frequencies up to 200Hz, this technology converts the PWM output voltage of motor drives into a smooth … [Read more...]
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