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motor for continouous motion

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engkeat

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my device helps to perform elbow continuous passive motion exercise. may i have the idea from you guys what type of motor is suitable to be used? the motor used must be low noise, can withstand continuous motion for hours without dissipated much power (hot), adjustable angle range. initially i plan to use stepper motor but i heard that stepper motor will dissipate a lot of energy if used for long period, any idea from you?
 

What about a simple ac induction motor?

Nandhu
 

Stepper is ideal for withstand continuous motion. U also can try Servo Motor.
 

The question can't be answered without knowing the application parameters (rotational speed, torque, acceleration profile, acceptable size). Generally, DC motors (conventional or brushless) can be expected to give the highest effiency and specific power. From your description (e. g. adjustable angle range), I expect that your actually needing a drive with a gear rather than a simple motor.

Also a conventional DC motor can be operated continously for hours, but it has a limited total lifetime of some 1000 hours, while brushless DC or stepper and AC motors have a life expectancy of many years.
 

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