Thank you for this description! If I were to reverse drive my motor (essentially use the VFD/motor as a brake, driving by another motor under test), would the resistor have to be sized for continuous use? I would only be holding a specific torque, not necessarilly decelerating.
this means today regeneration isn't mature enough, all that energy it's lost as heat trying to extract maximum of regeneration, at high regeneration there's progressive increase in loses which isn't far from ading brakes to the engine braking; probably that voltage it's huge at high speed having permanent magnets, probably it's decreased with negative stimulation of the rotor in order to reduce/neutralise the magnets - i don't know if works with that type of rotor
Yes. Braking resistors provide a reliable, but older way to dissipate excess energy in a system. Many applications are not conducive to regen technology and so uses braking resistors. We do offer regen drives, which put regenerated energy back on to the building power grid, saving money and energy. KEB has been a leader in regen drives for 20+ years, used in elevator, crane and hoist applications. Watch this video about regen: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IAnMVYOYHxg.html
You can also watch these two videos showing how a regen works in an elevator application: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6Mo2xOOP0cw.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MQvGLL2NO2w.html
The video should answer your question, Hariharan. The resistance is higher in the replacement you mentioned, so it should not damage the drive. But the power is lower and you have not said if that value is sufficient. You should contact a local KEB representative for more information before we can say it will be sufficient for your specific application. Find a local KEB Rep here: www.keb.co.uk/contact/contact-worldwide
