| URN |
etd-0817111-172847 |
Statistics |
This thesis had been viewed 968 times. Download 19 times.
|
| Author |
Hsu-Wei Liu |
| Author's Email Address |
No Public. |
| Department |
Institute of Electrical Engineering |
| Year |
2010 |
Semester |
2 |
| Degree |
Master |
Type of Document |
Master's Thesis |
| Language |
zh-TW.Big5 Chinese |
Page Count |
114 |
| Title |
Design and Implementation of a BLDC Drive with Regenerative Breaking for an Electrical Scooter |
| Keyword |
BLDC motorˇBultra capacitorˇB regeneration
BLDC motorˇBultra capacitorˇB regeneration
|
| Abstract |
This paper studies a DC brushless drive with regenerative breaking for an electrical scooter. Because the ultra capacitors have the characteristics of high power density and fast charge/discharge capability, the drive system could store the breaking energy of the electrical scooter in the ultra capacitors. The ultra capacitors could provide the stored energy to the drive circuit. As a result, the overheating of the batteries is avoided because no high charging/discharging rate of the batteries occurs. Moreover, the distance endurance of the electrical scooter is improved. On the other hand, the Hall-Effect sensors would not be mounted on the proper positions of the stator of the BLDC motor due to the electric machinery designs or manufacture defects. The wrong commutations will cause the large currents and torque pulsation. In order to solve the problem, a rotor position estimator is designed. According to the Hall-Effect mounted position and the rotor speed, the correct rotor angles of the motor could be estimated. Therefore, the BLDC motor could properly change phases by using the estimated rotor angles. Finally, this study implemented a BLDC drive system based on the dsPIC33 chip to drive a 300Watt hub BLDC motor. The experimental results show the smooth torque output of the motor and the longer distance endurance of the scooter. |
| Advisor Committee |
Ming-Tsan Lin - advisor
none - co-chair
none - co-chair
|
| Files |
indicate in-campus access immediately and off-campus access at one year |
| Date of Defense |
2011-07-28 |
Date of Submission |
2011-08-18 |
