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Direct Torque Control System for 3-phase (1.5 kW) Induction motor using microcontroller

Direct Torque Control System for 3-phase (1.5 kW) Induction motor using microcontroller. Statement of work. Design a direct torque control system for 3-phase induction motor Implement a variable speed drive system Obtain maximum torque control by estimating speed and torque.

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Direct Torque Control System for 3-phase (1.5 kW) Induction motor using microcontroller

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  1. Direct Torque Control System for 3-phase (1.5 kW) Induction motor using microcontroller

  2. Statement of work • Design a direct torque control system for 3-phase induction motor • Implement a variable speed drive system • Obtain maximum torque control by estimating speed and torque Bader Abdulmane - 110045356

  3. Team structure Dr Sam Ali (Project Supervisor) Badar Abdulmane (Software Designer) Rajveer Singh Boparai (Hardware Designer) Imran Ahmed (Team Leader) Bader Abdulmane - 110045356

  4. Project background • DC motors have the best performance but are very expensive • AC motors are cheaper, require less maintenance and have a longer life span • System have been developed to control speed of the AC motors • Variable frequency drives • Flux vector drives Bader Abdulmane - 110045356

  5. Direct torque control • Direct torque control was invented by Manfred on 20thOctober 1984 • Controls the torque therefore the speed of the motor • No speed or position sensor needed [1] DTC Block Diagram Bader Abdulmane - 110045356 [1] http://www.inverter-china.com/blog/upload/direct-torque-control.jpg

  6. Cost Rajveer Singh - 110024063

  7. Resources required Rajveer Singh - 110024063

  8. Risk management • Risk management is a part of project management • Provides risk-free work environment • Key to success of the project • Helps achieving the target Rajveer Singh - 110024063

  9. Risk rating matrix(cont.) • Categorizes risk consequenceand risk impact • Risk level can be determined by (Likelihood * Impact = Risk level) Rajveer Singh - 110024063

  10. Risk management process Rajveer Singh - 110024063 www.treasury.act.gov.au/actia/Guide.doc

  11. Project schedule Documentation Project Plan OH & S Progress Report Final Report Log Book Research Induction Motors DC Motors Direct Torque Control Hardware PCB Design Sensor Board Control Board PCB Construction Testing PCB Testing Component Testing Software Testing System Testing Programming Direct Torque control Frequency Control Direct Torque Control (Advanced) Webpage First Seminar Second Seminar Contingency Rajveer Singh - 110024063

  12. DTC system block • 3-phase bridge rectifier • One voltage sensor • Two current sensors • IGBT module (switching inverter) • 32-bit microcontroller 3~ supply (138V/Phase) Microcontroller Current Sensors Voltage Sensor 3-Phase Bridge Rectifier 3~ Motor IGBT module Figure: Direct torque control building blocks Imran Ahmed - 110052291

  13. Bridge rectifier • High voltage rating (800V, 35A) • Input rectifier for PWM inverters • Low in cost ($25) [1] Three phase bridge Rectifier Imran Ahmed - 110052291 [1] http://australia.rs-online.com/web/p/bridge-rectifier/2278845

  14. Inverter (switching device) • The IGBT module is ideal for three phase invertor application • Low cost ($30), usually inverter are very expensive • Some important feature of this IGBT module • Smart shutdown function with a single pin • Built in temperature sensor [1] STGIPS20K60 (IGBT Module) [1] http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00244265.pdf Imran Ahmed - 110052291

  15. Microcontroller • ATMEL AT32UC3C264C AVR microcontroller • High performance low power 32-bit microcontroller • 66MHz Crystal • Less time to perform calculations due to high clock frequency • High data transfer speed [1] 32-bit Microcontroller Imran Ahmed - 110052291 [1] http://www.mscbp.hu/Documents/Atmel%2032bit%20AVR.pdf

  16. Current sensor • Excellent accuracy • Very good linearity • Measuring range up to 25A (rms) [1] LA-25 NP Current Transducer Imran Ahmed - 110052291 [1] http://www.datasheetcatalog.org/datasheet/lem/LA25-NP.pdf

  17. Voltage sensor • Voltage measuring range up to 500V • Very good linearity • Low response time [1] LV-25 P Voltage Sensor Imran Ahmed - 110052291 [1] http://pdf1.alldatasheet.com/datasheet-pdf/view/89619/LEM/LV25P.html

  18. What’s next? • Currently we are developing PCB design • Will develop the software for DTC • Will perform testing on the sensors and components • This will allow us to make changes in the software according to the sensor’s output • Finally we will test the circuit by driving the motor Imran Ahmed - 110052291

  19. Questions?

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