It is my final 7th semester project ppt.

1. DESIGN AND CONTROL OF
SR-HUB MOTOR
By,
Hemang Joshi
Neel Patel
Jaydeep Thoriya
(110110109030)
(110110109029)
(110110109024)
Guided By,
Prof. Ishaq A. Sheikh

2. PHASED PROCESS DIAGRAM
Step 2 Step 3
Simulation Production
Mathematical
Design
procedure
PIC
Maxwell
Frequency
controlled
SR motor
Step 1

3. INTRODUCTION
Advantages over other motor
Introduction to SR-Hub motor
PWM controlled inverter

4. ADVANTAGES OVER OTHER MOTORS
 Not dependent on the direction of flow of current
 Easy cooling system
 Torque-Speed characteristic can be modified easily
 Higher starting torque without heavy in-rush current
 SC current is very small
 Max temperature limit of rotor is higher as no permanent magnet
are used.

5. INTRODUCTION TO SR-HUB MOTOR
 The stator is made up of the
field windings.
 Rotor is made of iron poles.
 One type of stepper motor
enclosure
Rotor pole tips Stator

6. WORKING OF SR MOTOR

7. SR-HUB MOTOR  Difference between SR motor
and SR-Hub motor
 SR motor
 Rotor is inside
 Used for
positioning
 SR-hub motor
 Rotor is outside
 Used for EV
Application
Wheel
Iron and poles
Stator
Shaft
Enclosure

8. PHASE VOLTAGE SUPPLY SEQUENCE
 We are having 30 𝑜
phase delay
 We are having 15 𝑜
Stroke angle
delay
Stroke
Phase A
Phase B
Phase C
Phase D

9. PWM AC POWER SUPPLY
Chopping of voltage

10. MOC7811 FOR POSITION SENSING
 Opto coupler
 IR Led and photo detector
 𝑡 𝑜𝑛 = 12-60 𝜇𝑠

11. INTRODUCTION PIC MICROCONTROLLER
 Analogue to Digital converter
 Analogue and Digital Comparator
 Interrupts
 In circuit programming
 Low operating current (6μA)
 Wide operating voltage range (2.0V to 5.5V)
 Commercial and Industrial temperature ranges
 Selectable oscillator options
 Programmable code protection
 Watchdog Timer (WDT)
 In-Circuit Debug (ICD) via two pins
 In-Circuit Serial Programming™ (ICSP™) via two
pins
 Operating speed: 20 MHz clock input and 200 ns
instruction cycle

12. COMPARISON OF PIC MICROCONTROLLERS

13. IC 4066 AS GATE COUPLER
 Range 3V to 15V
 High on state resistance 80Ω at 15V
operation
 0.1% distortion highly linear
 Extremely low “OFF” time current 0.1 nA
 Extremely high control input
impedance 1012
Ω
 Frequency response, switch “ON” 40
MHz

14. INTRODUCTION TO PROTON BASIC COMPILER
 Very popular
 Quick compilation, integrated programmer and
boot loader
 For both PC as well as PIC
 Commands and syntax fairly simple and English like
 Free to use for 16F877 up to 50 lines

15. INTRODUCTION TO PROTON BASIC COMPILER

16. POWER CIRCUIT BLOCK DIAGRAM

17. POWER CIRCUIT

18. CHOOSING POLE RATIO
Parameters 8/10 8/6
Stroke angle 9 degree 15 degree
Absolute torque zone 18 degree 30 degree
Time for one working
stroke
15ms 25ms
Frequency of excitation
of one phase
33.33Hz 20Hz
Profile of torque Not flat top Flat top

19. MAIN DESIGN PARAMETERS
 Stator pole angle (βs)
 Rotor pole angle (βr)
 Stator pole area (As)
 Rotor pole area (Ar)
 Stator pole height (hs)
 Air gap length (g)
 No of turn per phase (Ntps)
 Stator pole pitch (𝜆 𝑠)
 Stator pole arc length (ts)
 Aligned instance (La)
 Standard size conductor is SWG20
Stator
Rotor
Stator
Winding
Shaft
Outer
Diameter(Do)
Rotor
Pole Arc
(Br)
Rotor
Bore
Diameter
(D)
Stator
Pole Arc
(Bs)

20. Stator
Rotor
Stator
Winding
Shaft
Outer
Diameter(Do)
Rotor
Pole Arc
(Br)
Rotor
Bore
Diameter
(D)
Stator
Pole Arc
(Bs)
MAIN MOTOR PARAMETERS
Motor Specification
• Output power = 250W
• Rated Speed = 200 RPM
• Peak value of Current = 7.5A
• Supply Voltage = 48 V
• Stroke angle = 15 degree

21. INTRODUCTION TO ANSYS MAXWELL

22. TOTAL 6 TYPE OF PROBLEMS THAT CAN BE SOLVED
Magneto Statics
Electrostatic
Transient
Eddy current
AC Conduction
DC Conduction

23. HOW MAXWELL SOLVES THE PROBLEM

24. TRANSIENT PROBLEM SOLUTION IN MAXWELL 2D
In our simulation
• Speed : 0.5 rpm
• Excitation current : 7.5 A
• Result : Torque → Rotor position plot
• Field Overlays : Flux lines and Flux vector

25. OUTPUT CHARACTERISTIC 𝑇𝑜𝑟𝑞𝑢𝑒 → 𝑅𝑜𝑡𝑜𝑟 𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛
 Max output torque : 16.5 N.m

26. RESULTS IN ANSYS MAXWELL 16