Why do I need special cables for VFDs

Choosing the right cable for your variable frequency drive is critical to the operation of your system and avoiding costly downtime. To better understand why special cables are necessary, we’ll take a look at both the immediate and long-term impact that improper cables and configurations can have on your equipment along with ways to minimize problems.

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Ask Al - Medium Voltage Drive Topology Primer

Recent semiconductor technology advances have resulted in an increase of medium voltage drive models on the market. Unlike the low voltage market, these drives offer a variety of power circuit topologies. This video primer reviews the most common topologies available from major vendors, along with key advantages and challenges.   

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Ask Al presented by Quad Plus - Semiconductors

Diode, SCR, IGBT, SGCT, IGCT Puck and Isolated Base packages are used in all variable speed drive systems. A failure of one of these devices is typically the most costly from both the repair and downtime points of view. In this video, we discuss some myths and practical actions you can take to properly diagnose semiconductor problems and replace devices.

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Ask Al - Siemens Masterdrive Servicing

I have received many notifications about the discontinuation of the Siemens Masterdrive. As an owner of this drive system, this is the type of communication that causes anxiety. Questions such as How am I going to get parts, repairs, and service immediately start swirling in your head. And the biggest question of all is, if I have to remove and replace these drives, how much will it cost, how long will it take, and are their implications to my automation system.

So, what exactly does this notice mean?

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Ask Al presented by Quad Plus - Reforming Capacitors

Many AC Drives and other inverter types (i.e. solar) contain aluminum electrolytic capacitors for DC bus filtering. If these capacitors have been in storage for a period of time, for example in your spares, they may explode if reforming is not performed BEFORE applying full power. In this video we explain what is going on in the capacitor and what you can do to prevent explosions.

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