Stepper Motor Working: Benefits & Challenges

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SUMMARY

The discussion focuses on the use of stepper motors, specifically regarding their resistance to rotation when power is cut, which is critical for applications like an auto clutch system. Participants highlight that the detent torque, defined as the torque needed to overcome the motor's static equilibrium when unpowered, varies among different stepper motors. A high torque motor, such as the one mentioned with a specification of 85 kgcm, is noted for its significant resistance to rotation. Additionally, it is suggested that short-circuiting the motor when power is lost could enhance its resistance due to the generation of heat in the windings.

PREREQUISITES
  • Understanding of stepper motor mechanics
  • Familiarity with detent torque specifications
  • Knowledge of motor control systems
  • Basic principles of electromagnetic induction
NEXT STEPS
  • Research the specifications of high torque stepper motors
  • Learn about detent torque and its implications in motor applications
  • Explore stepper motor controllers with braking functions
  • Investigate the effects of short-circuiting stepper motors during power loss
USEFUL FOR

Engineers, hobbyists, and developers working on automation projects, particularly those involving clutch systems or requiring precise motor control.

Sridhar96
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Hey guys,
I am planning to use a stepper motor for a project of mine(Auto clutch system)

I would like to know if the stepper resists rotation if the power supply to it is cut,as this will be useful when we decide to shift the clutch to our control.
 
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hi there
have you played with a stepper motor ?
have you tried turning it when there is no power on it ? that is the resistance that there is to turning ( excluding any load resistance)
some are easy to turn, others are a little more difficultDave
 
Hi, i have not purchase 8
davenn said:
hi there
have you played with a stepper motor ?
have you tried turning it when there is no power on it ? that is the resistance that there is to turning ( excluding any load resistance)
some are easy to turn, others are a little more difficultDave
Hello, i have not purchased it yet.It is an extremely high torque motor(85 kgcm)..that is why i wanted to know.Thanks
 
The data sheet will have the detent torque:

Detent torque is the amount of torque that must be applied to a motor to overcome the static (magnetic) equilibrium of the motor when it is in an unpowered state of rest
 
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Look at the spec sheet for the stepper controller. It might have a break function.
 
If you short circuit the motor when the power supply is cut, I assume that the motor will resist rotation even more, because it will work as a generator, and will heat its own windings.
 

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