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.

scholarly journals FPGA Based Control Method for Three Phase BLDC Motor

2016 ◽  
Vol 6 (4) ◽  
pp. 1434
Author(s):  
Suneeta Suneeta ◽  
R Srinivasan ◽  
Ram Sagar
Keyword(s):  
Direct Current ◽  
Control Method ◽  
Cost Effective ◽  
Good Method ◽  
Reliable Control ◽  
Bldc Motor ◽  
Variable Speed ◽  
Three Phase ◽  
Speed Range ◽  
And Control

This paper introduces a good method which is helpful to assist in the design and control of cost effective, efficient Brushless Direct Current (BLDC) motors. Speed Control of BLDC motor using PIC microcontrollers requires more hardware, and with the availability of FPGA versatile features motivated to develop a cost effective and reliable control with variable speed range. In this paper, an algorithm which uses the Resolver signals captured from the motor is developed with the help of Resolver to Digital converters. The program has been written using VHDL. This program generates the firing pulses required to drive the MOSFETs of three phase fully controlled bridge converter driven by drivers. Then the program has been loaded on the Spartan- 3 FPGA device and tested on the 30V, 2000 rpm BLDC motor which can make the motor run at constant speed ranging from 10 to 2000 rpm. The proposed hardware and the program are found to be very good and efficient. The results are good compare to PIC Microcontroller based design.

FPGA Based Control Method for Three Phase BLDC Motor

2016 ◽  
Vol 6 (4) ◽  
pp. 1434
Author(s):  
Suneeta Suneeta ◽  
R Srinivasan ◽  
Ram Sagar
Keyword(s):  
Direct Current ◽  
Control Method ◽  
Cost Effective ◽  
Good Method ◽  
Reliable Control ◽  
Bldc Motor ◽  
Variable Speed ◽  
Three Phase ◽  
Speed Range ◽  
And Control

This paper introduces a good method which is helpful to assist in the design and control of cost effective, efficient Brushless Direct Current (BLDC) motors. Speed Control of BLDC motor using PIC microcontrollers requires more hardware, and with the availability of FPGA versatile features motivated to develop a cost effective and reliable control with variable speed range. In this paper, an algorithm which uses the Resolver signals captured from the motor is developed with the help of Resolver to Digital converters. The program has been written using VHDL. This program generates the firing pulses required to drive the MOSFETs of three phase fully controlled bridge converter driven by drivers. Then the program has been loaded on the Spartan- 3 FPGA device and tested on the 30V, 2000 rpm BLDC motor which can make the motor run at constant speed ranging from 10 to 2000 rpm. The proposed hardware and the program are found to be very good and efficient. The results are good compare to PIC Microcontroller based design.

scholarly journals Design and Implementation of Single Stage PFC Microcontroller Based Drive For Permanent Magnet Brushless DC Motor

2013 ◽  
pp. 289-293
Author(s):  
Minal A Bodkhe ◽  
Vaishali Nandanwar
Keyword(s):  
Permanent Magnet ◽  
Power Factor ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Three Phase ◽  
Wide Range ◽  
Sinusoidal Input ◽  
Bridge Rectifier ◽  
Permanent Magnet Brushless Dc

In this paper ,a new approach is presented aim at improving the power factor of three phase bridge inverter that equip with permanent Magnet Brushless DC motor(PMBLDCM)drive through microcontroller. Power factor correction converter is used for feeding a three phase bridge inverter based PMBLDC motor drive. The front end of PFC converter is a diode bridge rectifier fed from a step down transformer. In this three phase bridge inverter is operated as electronic commutator of the PMBLDCM .Nearly sinusoidal input current is achieved using. The proposed PMBLDCM drive with PFC converter is designed to run the motor to desired speed. This scheme improves an efficiency of proposed drive system with PFC feature in wide range of the speed and an input AC voltage.

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>

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