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As we’ve recently outlined, there are many factors that contribute to medium voltage VFD power cell life. With care and planning (or a preventative maintenance
Unlike low voltage variable frequency drives where the topology is consistent from manufacturer to manufacturer; medium voltage variable frequency drives come in a wide variety
Thanks to you, EMA is celebrating 30 years in business! The only reason we exist is you, our customers, and we never allow ourselves to
Variable Frequency Drives (VFDs) can be used in a variety of applications for a variety of purposes. As a service engineer, I’ve seen some interesting
The application of electronic variable speed drives to electric motors has grown dramatically. Since transistorized inverters (AC Drives) became readily available in the early 80’s,
We work on quite a few Square D and Eaton MCC Softstarters. Most of them, as it turns out, are actually manufactured by Motortronics. Motortronics
We recently had the opportunity to service Siemens Robicon Perfect Harmony VFDs on a LNG Carrier (Ship) in the middle east. When natural gas is
One of the key features of all low voltage VFDs is their ability to softly charge the DC bus capacitors. This feature is not a
Siemens/Robicon Perfect Harmony Power Cells (power modules) can be tested in the field, at the job site. Field testing the Perfect Harmony Power Cells (power
Medium Voltage VFDs are coming down in price as the market grows more competitive. Nonetheless, they remain expensive. The cost is not only the initial
Industrial Internet of Things IIoT and VFDs. Our primary business is variable frequency drives (VFD) and our focus is high horsepower and medium voltage VFDs.
(Eddie Mayfield is the President of EMA, a company specializing in Electronic Motor Controls with particular expertise in Water and Water Treatment facilities) I had