| URN |
etd-0729114-170615 |
Statistics |
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|
| Author |
Tung-hsing Chang |
| Author's Email Address |
No Public. |
| Department |
Institute of Electrical Engineering |
| Year |
2013 |
Semester |
2 |
| Degree |
Master |
Type of Document |
Master's Thesis |
| Language |
zh-TW.Big5 Chinese |
Page Count |
101 |
| Title |
Design and Implementation of a BLDC Drive with Field Oriented Control for an Electrical Scooter |
| Keyword |
Electric Scooter
Field-oriented control
BLDC motor
Hall Sensor
Hall Sensor
BLDC motor
Field-oriented control
Electric Scooter
|
| Abstract |
This thesis presents a brushless DC (BLDC) motor drive with field oriented control strategy for an electrical scooter. Typically, the BLDC applied in electric scooter whose back EMF is near to sine wave rather than trapezoidal wave, thus the thesis uses voltage space vector modulation to output three-phase voltage vectors of sine wave to avoid large torque pulsation results from the traditional BLDC driven by six-step square wave. Due to using the field oriented control strategy need to get feedback of correct angel information, however all the BLDC drive of electric scooter uses Hall-sensor which only can obtain the position of magnet with low resolution. Moreover, the Hall-effect sensors would not be mounted on the proper positions and then cause signal deviation due to the electric machinery designs or manufacture defect. Thus this thesis designs a rotor position estimator with three low resolution Hall-effect sensors to obtain estimated correct rotor angle. Then, the drive could output appropriate voltage vectors. To verify the feasibility of the method, this thesis implements a 300Watt hub BLDC drive system. It uses a digital signal controller dsPIC33FJ64MC204 as a control chip to execute all of control procedure. Finally, the experimental results confirm that the driver poses smooth, fast torque and improves the performance and comfort of electric scooter. |
| Advisor Committee |
Ming-Tsan Lin - advisor
Ching-Guo Chen - co-chair
Yi-Jen Wang - co-chair
|
| Files |
indicate access worldwide |
| Date of Defense |
2014-07-09 |
Date of Submission |
2014-07-30 |
