Energy Recovery Electric Bicycle with Two-Quadrant DC Motor Drivers

2009 ◽  
Author(s):  
Yu-Lung Ke ◽  
Ying-Chun Chuang ◽  
Hung-Shiang Chuang
Keyword(s):  
Energy Recovery ◽  
Dc Motor ◽  
Electric Bicycle

scholarly journals Performance analysis of brushless DC motor with optimum magnetic energy for bicycle application

2021 ◽  
Vol 12 (4) ◽  
pp. 2113
Author(s):  
Muhamad Ariff Khalid ◽  
Raja Nor Firdaus Kashfi Raja Othman ◽  
Nor Aishah Md Zuki ◽  
Fairul Azhar Abdul Shukor ◽  
Md Nazri Othman ◽  
...  
Keyword(s):  
Magnetic Energy ◽  
Dynamic Condition ◽  
Load Condition ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Density Parameter ◽  
Electromagnetic Torque ◽  
Bldc Motor ◽  
Brushless Dc ◽  
Electric Bicycle

<span lang="EN-US">Brushless DC (BLDC) motor is widely used for various applications such as transportation. BLDC motor has many advantages compared to brush motor such as more compact, high robustness and simplest construction. The maintenance of this motor also low compared to brush motor due to absent of the brush inside the motor. For electric bicycle application, the conventional motor has low electromagnetic torque because not properly designed. It faces low torque density as the motor in full load condition especially during climb uphill. In this research, an optimum magnetic energy is being determine by proper selection of permanent magnet size. In addition, this research also increases the input current in dynamic condition into the designed BLDC motor. Finite element method (FEM) is used to analyze other performance characteristic of improved motor such as back electromotive force (EMF), electromagnetic torque, flux linkage, and stator flux density. Parameter for improve the current motor are selected and varied based on the required specification. In conclusion, the research proposed the new motor specification that has highest electromagnetic torque of brushless DC motor. Finally, this research provides guidelines, suggestions and proposes a better improved structure in optimize the magnetic energy in BLDC motor.</span>

scholarly journals Design of a three phase four quadrant variable speed drive for permanent magnet brushless DC motors

2016 ◽  
Author(s):  
◽  
Jonas-Yelee Dakora
Keyword(s):  
Permanent Magnet ◽  
Direct Current ◽  
Dc Motor ◽  
Bldc Motor ◽  
Variable Speed ◽  
Suitable Alternative ◽  
Variable Speed Drive ◽  
Three Phase ◽  
Electric Bicycle ◽  
Four Quadrant

The aim of this research project is to design a three phase four quadrant variable speed drive (VSD) for a permanent magnet brushless direct current motor (PMBLDC) that can be applied to an electric bicycle (e-bike). The design is confined to PMBLDC motors with a maximum power rating of 1.5kW. The speed controller operates in current mode at a maximum voltage and current rating of 50V and 30A, respectively. The VSD has the ability to smoothly control the current delivered to the DC motor and therefore controls its torque. The motor’s current is limited in all four quadrants of operation, and its speed is limited in the forward and reverse directions. The performance of the proposed DC motor VSD system is tested on an electric- bicycle. The PMBLDC motor has three hall sensors embedded into the stator to determine rotor position. A phase switcher module interprets the position signals and produces a switching pattern. This effectively transforms the BLDC motor into a direct current (DC) brushed motor. The unipolar switching scheme used ensures that current flows out of the battery only for motoring operation and into the battery during regenerative braking. The current and torque are directly proportional in a BLDC motor. Torque control is achieved in the BLDC motor using a single channel current controller. The phase switcher current is monitored and used to control the duty cycle of the synchronous converter switches. The proposed e-bike speed control system provides efficient control in all four quadrants of operation and it is a suitable alternative for a low cost transportation mode.

The Design of an Electric Bicycle Controller Based on Programmable System on Chip

2013 ◽  
Vol 347-350 ◽  
pp. 434-437 ◽  
Author(s):  
Li Qin Zhang ◽  
Yuan Ping Shi ◽  
Wen Xia Cai ◽  
Li Bo Tian ◽  
Li Yuan
Keyword(s):  
Dc Motor ◽  
System On Chip ◽  
System Structure ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Electric Bicycle ◽  
Drive Circuit ◽  
On Chip

This paper presents an Electric bicycle controller,which is designed on the basis of Programmable System-On-Chip used in BLDCM. The system structure is described. The software and drive circuit are designed. Several modules integrated in PSOC,such as PWM,AD and timer modules,are used to Electric bicycle controller the brushless DC motor can be controlled by PWM output with the help of HALL-position sensors.

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