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MSP430 Motor Controller Applications

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Presentation on theme: "MSP430 Motor Controller Applications"— Presentation transcript:

1 MSP430 Motor Controller Applications
LT Thomas Pat O’Hara TJ Volinski Kole Reece

2 Outline H-Bridge Types of Motors Polarity Stepper Motor Brushed Motor
Brushless Motor Permanent Magnet Motor AC Induction Motor 4/1/2011 Design Team 6

3 Speed Controller Definition Closed Loop Vs Open Loop
How do we Implement motor control Protection Switching Mechanism Bipolar Operation Unipolar Operation Pulse Generator 2/16/2011 Design Team 6

4 System Diagram 2/16/2011 Design Team 6

5 Unipolar 2/16/2011 Design Team 6

6 Bipolar 2/16/2011 Design Team 6

7 Schematic Implementation
2/16/2011 Design Team 6

8 Types Of Polarity Axial & Radial Flux 4/1/2011 Design Team 6

9 N Stepper Motors Introduced in the 1960’s Advantages Disadvantages
Replace Servos Advantages Long Life Excellent Low Speed High Speed Protection Disadvantages High Power Big Size for Lower Power N 4/1/2011 Design Team 6

10 Torque Control 4/1/2011 Design Team 6

11 4/1/2011 Design Team 6

12 Motor Controller DRV88xx Steps 8 to 45 Volts, 2.5 A Full 1/4 1/16 1/2
1/8 1/32 4/1/2011 Design Team 6

13 MSP430 Applications 4/1/2011 Design Team 6

14 Brushed DC Motor Stator has permanent magnets
Rotor has coil, creates EMF Half rotation is sensed with, commutator. Actually AC motor. 4/1/2011 Design Team 6

15 Brushed DC Motor 2 Brushes still short out
Still have 4 loops of conducting 4/1/2011 Design Team 6

16 Brushless DC Motor Coils on the Stator Permanent Magnet on Rotor
Motor topology is nondetermistic 4/1/2011 Design Team 6

17 Brushless DC Motor Add more phases to stator
Run current through different phases. 4/1/2011 Design Team 6

18 Brushless DC Motor Hall effect sensors detect transitions from North to South poles. 3 sensors provide binary data. Never get 000 or 111 therefore use as error codes. 4/1/2011 Design Team 6

19 Permanent Magnet Motor
AC Motor Sinusoidal Windings on Stator 3-Phase: each winding coexists together 4/1/2011 Design Team 6

20 Permanent Magnet Motor
Field Oriented Control Calculate the rotor flux Calculate current of A,B,C windings to make current vector 90 degrees of rotor flux. Magnitude of current vector can be adjusted for different speeds Used in applications where a small motor is needed Uses less power than other motors 4/1/2011 Design Team 6

21 AC Induction Motor Rotor and Stator both have windings
Asynchronous Motor Magnetic field must rotate faster than rotor Motor can slow down or slip Field Oriented Control or V/Hz 16-bit microcontroller used for V/Hz 32-bit microcontroller used for FOC Most popular motor in consumer and industrial applications 4/1/2011 Design Team 6

22 MSP430 Brush and Brushless
MSP430 connected to a DRV8801 motor controller. 4/1/2011 Design Team 6

23 Summary Low Speed with High accuracy Long life High Torque No Feedback
Stepper motor Long life AC Induction, Stepper motor, & Brushless High Torque AC Induction No Feedback Stepper & Brushed Less Power Permanent magnet 4/1/2011 Design Team 6

24 Questions 4/1/2011 Design Team 6

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