Stepper Motor (Leaving Cert Engineering): Flashcards
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What type of device is a stepper motor?
What type of device is a stepper motor?
Specialised electromechanical device
Stepper motor movement type
Stepper motor movement type
Exact, controlled steps (not continuous)
What controls stepper motor direction?
What controls stepper motor direction?
Sequence of electrical pulses
What controls stepper motor speed?
What controls stepper motor speed?
Frequency of input pulses
What controls total rotation angle?
What controls total rotation angle?
Number of input pulses
Stepper motor torque when stationary?
Stepper motor torque when stationary?
Full torque when windings energised
Stepper motor positioning accuracy %
Stepper motor positioning accuracy %
Within 3-5% of each step
Do step errors accumulate?
Do step errors accumulate?
No, errors don't accumulate between steps
Why are stepper motors reliable?
Why are stepper motors reliable?
No contact brushes, minimal wear
Stepper motor open-loop control benefit?
Stepper motor open-loop control benefit?
Simple control without complex feedback
Stepper motor resonance problems?
Stepper motor resonance problems?
Vibration, noise, loss of steps
Stepper motor high-speed limitation?
Stepper motor high-speed limitation?
Difficult to operate at very high speeds
Stepper motor rotor composition?
Stepper motor rotor composition?
Permanent magnets with N and S poles
Number of coils around rotor
Number of coils around rotor
Four electromagnetic coils
Three applications of stepper motors
Three applications of stepper motors
Robotics, CNC machines, 3D printers