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For JBartos: Yes,we are interested in both, motor efficiency and it's measuring. The motor is part of injection-moulding machine with 1 sec cycle and we would like to know wether any savings are possible while low period of pressure.We need some kind of "power quality" meter and being...

Forgot, plc123, could you, please explain : If you have active energy reading and calculated heat dissipation, then efficiency is available. How to calculate the savings?

Electricpete, it was useful to read the thread you mentionned - thank you! So, as a conclusion, if we summarize and make (short) list about possible reasonable application, what they would be? Are injection-moulding mashines on the list, and how's with elevators and escalators for example?

By the way, what's your opinion about TRIAC constant speed motor controllers (can we expect significant savings - are they cost effective, how they affect other equipment, what's with harmonics etc)? What different type are avalable? And, could you recommend some if your opinion is positive...

Thank you for your helpful answers! Maybe with measured Input Power (some Power Analyzer) and Slip Method for Output Power we may expect ratio: Efficiency with motor controller on to Efficiency with motor contr. off aproximately correspond to the real ratio of these two values (presuming that...

Hi, I'd like to test thyristor based motor controller (measuring voltage zero crossing to regulate the current flow) on the on 3 phase induction motor. What would be appropriate equipment and what electrical and mechanical parameters I have to measure to obtein the most reliable assess of...