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Question
Hello, do hybrid stepper motors have a constant power consumption? If not what is a typical efficiency factor for them? (maybe based on their rotation velocity?)

Answer
I think the content of the following URL will answer your question.

http://users.ece.utexas.edu/~valvano/Datasheets/StepperSelection.pdf

The power consumption is a function of the load, the stepping rate and the driver being employed.  In the document above referenced it shows some typical curves of efficiency and mechanical output power.

Power consumption with most drivers will not only vary with load but with each step it takes; the driver will help to smooth out the electrical power pulses, but the driver and motor form a system that is integrated and optimized.

If you are running the motor continuously it will smooth out the power pulses but the conversion efficiency will still be a function of the loading.  Here is an example of a continuous running system:

http://www.orientalmotor.com/products/stepper-motors/AR-series-stepper-motors-pu

Hope this helps.  

Electronics

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Electronics questions about AC, DC and digital theory.

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Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)

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IEEE (Institute of Electrical and Electronics Engineers); Senior Life member AES (Audio Engineering Society), Fellow Life member

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BSEE University of North Dakota

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