Stepper Motor: By: Raghav Aggarwal
Stepper Motor: By: Raghav Aggarwal
Stepper Motor: By: Raghav Aggarwal
By : RAGHAV AGGARWAL
INTRODUCTION
A stepper motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. Also called as STEP MOTOR because this motor rotates through a fixed angular response to each input current pulse. Power output ranges from 1W to maximum of 2500W. Moving part is rotor which has no windings, commutator or brushes.
STEP ANGLE
It is angle through which shaft motor rotates for each command pulse It is usually 1.8 degree , 2.5 ,7.5 and 15 degree.
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VARIABLE RELUCTANCE STEPPER MOTOR PERMANENT MAGNET STEPPER MOTOR HYBRID STEPPER MOTOR LAVET TYPE STEPPER MOTOR
APPLICATIONS
Used widely in computer peripherals, textile fabrications, IC fabrications, robotics etc. In typewriters, line printers, tape drivers, floppy disk drives, process control systems In feedback control systems as such in various CNC machines. In the field of lasers and optics they are frequently used in precision positioning equipment such as linear actuators, linear stages, rotation stages, and mirror mounts. Other uses are in packaging machinery, and positioning of valve pilot stages for fluid control systems.
ADVANTAGES
Stable. Can drive a wide range of frictional and inertial loads. Needs no feedback. The motor is also the position transducer. Inexpensive relative to other motion control systems. Standardized frame size and performance. Plug and play. Easy to setup and use. Excellent repeatability. Returns to the same location accurately. Long life. Bearings are the only wear-out mechanism.
Excellent low speed torque. Can drive many loads without gearing.
DISADVANTGES
Low efficiency. Motor draws substantial power regardless of load. Low accuracy. 1:200 at full load, 1:2000 at light loads. Requires micro-stepping to move smoothly. No feedback to indicate missed steps.
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