The EMA Blog

By Eddie Mayfield and Abdou Barrow, EMA Inc. To begin, the design of modern variable frequency drives (VFD) takes output ampere readings very seriously.  The drive protection circuits in modern drives are excellent, which is why output device failures are very low given the fact that they routinely switch large currents. Although its not advised, [...]

As drive technology has become more user-friendly and reliable, our repair business has changed significantly. Gone are the days of repairing small HP VFDs with large surface mount components. It is generally cheaper to replace a standard small HP VFD than repair it. However, there are certain applications, specifically,  drives on precise machines like Bonfiglioli, [...]

EMA has elected to begin stocking 2000 HP Toshiba T300MVi  VFDs.   The part number is M3A44200SAA which is a 2000 HP, 4160 Volt medium voltage VFD in a Nema 1 enclosure.  With delivery times on MV drives running 6 months or more, EMA decided there was a need to begin stocking these units.  Since the [...]

VFD (Variable Frequency Drives) have decreased in price in recent years, and with standard VFDs, it’s often more advantageous from an economic viewpoint to replace rather than repair the VFD.   At EMA, as with most reputable VFD Repair companies, we let customers know at once if  in our opinion, this is the case.  The customer [...]

The GE Multilin is a popular motor management and protection device.   The Mulitilin is not particularly difficult to install or setup, but can present an challenge if you’re not familiar with these types of devices. Large motors running on critical applications often need additional protection from that afforded by simple thermo-mechanical trip devices.   These motors [...]

We grew up primarily as an electronic motor drive repair company but began to repair soft starters almost from  our inception.  Modern softstarters are reliable,  effective, and provide great benefits. First:  If you need the motor to vary in speed, you don’t need a softstarter, you need a VFD.  But,  if you’d like to reduce [...]