Presentation for unit V in Mechatronics excluding case study. Stepper motor, servo motor, design procedure, Traditional and Mechatronic design approach

1. Naveen Uthandi., B.E (Aero)., M.E.,
9500706051

2. Types of Stepper and Servo motors
Construction
Working Principle
Advantages and Disadvantages.
Design process
Stages of design process
Traditional and Mechatronics design concepts

3. Stepper Motor
Stepper motor is a brushless, synchronous electric
motor and an electromagnetic device that uses
magnetic field to move the rotor with the aid of digital
pulses that drives power solid state devices ON and
OFF

4. The 3
Types Of
Motors?
1. Variable
Reluctance
Stepper
2.
Permanent
Magnet
Stepper
3. Hybrid
Synchronous
Stepper

5. Rotor
Stator
Coils
2
1
S
N
1
2
Outside Casing
Stator
Rotor
Internal components of a Stepper Motor
Construction

6. WORKING PRINCIPLE
 Stator connected to electrical pulse signal provider
which is controlled by a controller.
 With respect to the pulse given to the controller it
passes electric current to flow over a stator.
 When current flows through stator it act as an electro
magnet and attract or repels the rotor depending on its
magnetic property.

7. Variable reluctance stepper
plain iron rotor
Minimum reluctance
occurs with minimum gap.
Rotor points attracted
towards stator poles

8. Permanent magnet stepper
Permanent magnet (PM) in the rotor
operate on the attraction or repulsion b/w the rotor PM
and the stator electromagnets.
The motor operates in the following modes of operation:
One phase on mode full step operation.
Two phase on mode full step operation.
Micro stepping

9. HYBRID SYNCHRONOUS STEPPER
 Combination of PM and VR techniques
 achieve maximum power in a small package size.

11. Variable reluctance Permanent magnet Hybrid
1) Soft iron multipole rotor
and a laminated core in
the wound stator
2) Has four "stator pole
sets" (A, B, C,) set 15
degrees apart
3) Rarely use in industry
because of less detent
torque.
1) Rotor has no teeth and
and a laminated core in
the wound stator
2) Has four phase and 90
degrees apart.
3) Ideal choice for non
industrial application
such as a line printer
print wheel positioner
and operate at fairly low
speed.
1) Standard Hybrid motor
has 200 rotor teeth and
bifilar stator windings.
2) Standard Hybrid motor
move at 1.8 step
angles.Other Hybrid
motor available in
0.9ºand 3.6º step angle
configurations.
3) Wide variety used for
industrial applications
because of high static
and dynamic torque and
run at very high step
rates.
Types of stepper motor

12. TORQUE GENERATION
The torque produced by a stepper motor depends on several
factor.
1. Step rate
2. The drive current in the winding
3. Drive design
The basic relationship which define the intensity of magnetic flux
is defined by:
H = (N x i)/ l where:
H = Magnetic flux intensity
N = The number of winding turns
l = Magnetic flux path length

13. Advantages
1. Excellent response to starting/stopping/
reversing.
2. It is possible to achieve very low speed synchronous rotation
with a load that is directly coupled to the shaft.
3.The motors response to digital input pulses provides open-loop
control, making the motor simpler and less costly to control.
The motor has full torque at standstill
(if the windings are energized)

14. DISADVANTAGES
1. Resonances can occur if not properly controlled.
2. Not easy to operate at extremely high speeds

15. APPLICATIONS
 They are commonly used in watches and old electric meters
 They are used in wide variety
1. In Industry
As - Drilling Machine,
- Grinder,
- Laser Cutting,
- Conveyor;&
- Assembly Lines.
2. In computer Peripherals
As - Printer,
- Plotter,
- Tape Reader,
- Card Reader;&
- Copy Machines.
3. In Business
As - Banking systems;&
- Automatic typewriters.
4. In Motion Control and Robotics
As - Silicon Processing;&
- I.C. Bonding.

16. What is servo motor?
 A servomotor is a rotary actuator that allows for precise
control of angular position, velocity and acceleration. It
consists of a suitable motor coupled to a sensor for
position feedback.
 Servomotors are not a specific class of motor although the
term servomotor is often used to refer to a motor suitable
for use in a closed-loop control system.
 Servomotors are used in applications such
as robotics, CNC machinery or automated manufacturing.

17. Fleming Left Hand rule

18. Direct Current Motors

20. Ac servomotor

21. Applications
 Machine Tool (Metal Cutting)
 Machine Tool (Metal forming)
 Antenna Positioning
 Packaging
 Woodworking
 Textiles
 Printing

22. Applications
 Rope/Twine manufacturing
 Co-ordinate measuring machines (CMM)
 Floor polishing
 Material Handling
 Door Opening
 X-Y table
 Wafer spinning
 Medical equipment

23. Design Process

24. Traditional and Mechatronics
design
Traditional
The design having plenty of moving and rotating
components for design some task.
Mechatronics
All components are incorporating with electronics and
compacting technologies

25. Traditional design

26. Mechatronics design