How Stepper motor is working in Tamil # தமிழ்
Channel: BYMS Electronics
Date: 2018-09-09

This Video explain the working, full step, half step, Wave drive pulse pattern, wire connection of  unipolar and bipolar stepper motor in Tamil. 
The stepper motor is differ from other motors because of its unique rotor construction. The rotor is permanent magnet with 50 north pole and 50 south pole teeth. This unique arrangement is achieved easily from hybrid  type two stack arrangement, that is, the north pole of the stepper motor rotor is made of ring with 50 peaks and valleys as show in video in Tamil and similarly at the south pole a ring with same 50 peaks and valleys but arranged by aligned peaks of the north pole to valley of the south pole, thereby, it is easy to multiple poles arrangement at low cost. That how the stepper motor is cost economical. 
The stepper motor stator has 8 poles among which 4 poles is usually considered as a group of poles. The wiring diagram is also shown in this video and explained in Tamil. 
The unipolar and bipolar motor is basically based on the stator coil connections. The rotor is same for both unipolar and bipolar stepper motor. In stator the difference is in unipolar each group of coil has 3 wires because of center tapped, so totally 6 wires will come out of the motor, in some cases the center tapped wire of both unipolar and bipolar is connected together and taken out which give total 5 wires. In bipoar stepper motor, there wont be center tapped wire, so totally four wires are taken out from stepper motor.
The pulse pattern to the stator is classified as full step, half step and wave drive for unipolar motor and for bipolar motor the pulse patterns are full step and half step.
This video explain this all, also the stepper motor is deassembled for clear understanding.

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