Integrated Driving-Braking Control Design for Electric Bikes
碩士 === 國立中興大學 === 電機工程學系所 === 104 === This thesis presents design and implementation of a dspic3011-based control desgin for the speed control of brushless DC hub motor (BLDCHM) drive and brake. For the driving section, the control command determined by the proportional-integral (PI) calculation and...
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| Format: | Others |
| Language: | en_US |
| Published: |
2016
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| Online Access: | http://ndltd.ncl.edu.tw/handle/49472192267151450651 |
| Summary: | 碩士 === 國立中興大學 === 電機工程學系所 === 104 === This thesis presents design and implementation of a dspic3011-based control desgin for the speed control of brushless DC hub motor (BLDCHM) drive and brake. For the driving section, the control command determined by the proportional-integral (PI) calculation and the use of a typical six-step square wave drive brushless DC motor. For the braking section, we propose an electromagnetic brake with the aid of a stepping motor to drive a braking arm to create extra friction to the wheel frame for enhancement of braking effect. The design is advantageous when it is necessary to control wheel speed while driving down very steep and long slopes. Electromagnetic brake adjusts braking force in two ways. One is related to hardware implementation which introduces a virtual load to the motor stator’s coil while the wheel in under free inertial rotation. The other is the use of software design to adjust the duty cycle of pulse width modulated (PWM) status of the MOSFETs at the driving circuit. For the auxiliary brake, the use of high-precision angle and positioning control of a stepping motor linked with a brake pad to create extra friction to help stopping the wheel. The proposed scheme has been implemented in an electric bicycle. All functions and effects of driving and braking designs have been well verified via a variety of real-world experiments.
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