What are shaft currents and how to protect my AC motor

[@ABBMotorsandDrivesUS]

Contact your local ABB representative for more information related to motor bearing protection: bit.ly/3qZgt9N Learn more about Baldor-Reliance motors for the HVAC industry: bit.ly/3rbKHaf

[@terrancestodolka4829]

Really some great engineering of electric motors to last and fix a common problem of wear to the motor by induced rotor bearing discharge to ground...

[@malfiandhika]

are there any solutions beside of those three? what about creating a ceramic coating on the surface of the shaft that connect to the inner bearing bore surface?

[@nathkrupa3463]

Wow excellent great technology thanks sir.

[@lorenzocaracixtos547]

Interesting. Thank you to share the experience and the video. Just great.

[@ABBMotorsandDrivesUS]

Glad you enjoyed it!

[@abdelazizchbani7211]

Amazing thanks

[@MrICE003]

Can I use both ceramic bearings (NDE) and DE grounding on a motor that is running a belt driven load?

[@ABBMotorsandDrivesUS]

Thank you for your inquiry. Please contact us with this link, so we can put you in touch with the best person to answer your question: ecs.page.link/94ueY

[@markgurney8682]

A third option is the use of nano crystalline EMF cores which burn common mode current before it gets to your motor thus protecting motor insulation. Grounding rings and insulated bearings don't offer this protection. More than 99% of common mode current can cheaply be eliminated by these cores. 3Phi Reliability are bearing fluting specialist's.

[@Qeswara]

‏‪4:58‬‏ Using a single motor with a well-engineered mechanical system will certainly reduce complex electronics issues and reduce power consumption.

[@clems6989]

Conductive grease in the bearings !

[@bharatkushwaha8612]

Nice motar wanting

[@ABBMotorsandDrivesUS]

Good choice

[@norberthani]

The first step in protecting the bearings would be to stop making motors with the cable entry plate painted and isolated with a rubber gasked from the motor chassis.

[@MrICE003]

Are you referring to ground the cable glands, cable and plate together with motor?

[@norberthani]

@@MrICE003 Yes! You need to provide a return path through the cable shield to the high frequency currents that appear due to parasitic capacitances in the motor.

[@MrICE003]

@@norberthani If this total cable>gland>plate>motor grounding has been achieved, do I still need: 1) both shaft grounding with one side insulated/ceramic bearing, 2) either grounding or insulated/ceramic bearing 3) none

[@norberthani]

@@MrICE003 If this shield continuity is achieved, then you don't need additional measures. However, for motors bigger than, let's say, 90 kW, isolated non-drive end bearing is recommended to avoid circulating currents.

[@Qeswara]

Lots of complexity, conversion, consumption, coding and electronics !!!!