Advanced Speed Control Techniques of Brushless Dc Motor
Transcript of Advanced Speed Control Techniques of Brushless Dc Motor
![Page 1: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/1.jpg)
DIRECT TORQUE CONTROL OF BRUSHLESS DC MOTORS
![Page 2: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/2.jpg)
OBJECTIVE
To control the speed of three phase brushless dc motor by using Direct torque control principle.
To find some satisfactory solution for the problems that arise in applying Direct torque control principle.
To introduce new optimization techniques for improving the performance of Direct torque controlled Brushless DC motor drive.
![Page 3: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/3.jpg)
CLASSIFICATION OF MOTORS
![Page 4: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/4.jpg)
BRUSHLESS DC MOTORSBrushless Direct Current (BLDC) motor
one of the type of synchronous motor. BLDC motors do not use brushes for
commutation; instead, they are electronically commutated.
BLDC motors are used in industries such as Appliances, Automotive, Aerospace, Consumer, Medical, Industrial Automation Equipment and Instrumentation.
![Page 5: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/5.jpg)
ADVANTAGES OF BLDC MOTOR
BLDC motors have many advantages over brushed DC motors and induction motors.
A few of these are: Better speed versus torque characteristics High dynamic response High efficiency Long operating life Noiseless operation Higher speed ranges
![Page 6: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/6.jpg)
DISADVANTAGES OF BLDC MOTOR
Cost of Permanent Magnets
Need for Position Sensors
Limited Extended Speed Range
Field Weakening Operation is Difficult
![Page 7: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/7.jpg)
MODELING OF BLDC MOTOR
![Page 8: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/8.jpg)
![Page 9: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/9.jpg)
SPEED CONTROL TECHNIQUES
![Page 10: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/10.jpg)
DIRECT TORQUE CONTROL
![Page 11: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/11.jpg)
FEATURES OF DTC SCHEME
Direct torque control and and direct stator flux control
Indirect control of stator currents and voltage
Approximately sinusoidal stator flux and stator currents.
High dynamic performance
![Page 12: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/12.jpg)
ADVANTAGES OF DTC SCHEME
Absence of co-ordinate transformation
Minimal torque response time.
DISADVANTAGES OF DTC SCHEME
• possible problems during starting
•Inherent torque and flux ripples
![Page 13: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/13.jpg)
optimizationOptimization is one of the acute
problem in science and technology.
Several optimization techniques are there like
1. Genetic algorithm2. Simulated analysis3. Swam optimization4. Ant colony algorithm
![Page 14: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/14.jpg)
Contd.. Reason for choosing bacteria
foraging optimization ?
Bacteria foraging optimization- the most primitive organisms to be dealt for global optimization.
![Page 15: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/15.jpg)
![Page 16: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/16.jpg)
Swam foraging in adaptive control
![Page 17: Advanced Speed Control Techniques of Brushless Dc Motor](https://reader038.fdocuments.in/reader038/viewer/2022102618/545a6ad3b1af9f33608b5979/html5/thumbnails/17.jpg)
Software for implementation
The total direct torque control of BLDC motor is simulated using MATLAB / SIMULINK software