Analysis of Operation of Sensorless Brushless DC Motor Using Zero Crossing Point Algorithm

Author(s):  
Manasi Patro
2014 ◽  
Vol 687-691 ◽  
pp. 183-186 ◽  
Author(s):  
Yu Hong Liang ◽  
Hai Bo Huang ◽  
Deng Liang Cheng ◽  
Jian Ping Lan

Brushless DC Motor is a kind of a new motor which commutation signals replaces traditional motor mechanical structure with electronic signals. Square wave brushless DC motor can be divided into sensor motor and sensorless motor. Position sensor will increase system cost, motor size and maintenance difficulty, which bring about limitation and limits to promote its application in all areas. This project designs sensorless BLDC Motor control system with the core of the stm32 micro-controller and uses Back-EMF zero-crossing detection method. In the system designing software control algorithm, drawing schematic diagram of hardware and making PCB board have been completed dependently. The experimental results show that the system can well realize the starting and running of sensorless BLDC Motor control system, and have a good measure of protection.


2011 ◽  
Vol 383-390 ◽  
pp. 4424-4431
Author(s):  
Chang Chun Chen ◽  
Jia Dan Wei ◽  
Bo Zhou ◽  
Guo Sheng Li

Zero crossing points of Back-Electromotive force (EMF) is the most mature and widely used method of the speed sensorless control of brushless DC motor (BLDCM). However, with the poor performance from standstill to low speed, it is not suitable for the position servo system. Therefore, this paper first analyzes several conventional speed sensorless control schemes in the BLDCM, then presents a novel control algorithms for the BLDCM. In the proposed method, the short pulse sensing method for the rotor position in the Start-Up process and self-synchronization with zero cross points of back-EMF are combined together. As a result, the BLDCM used in the position servo system can be easily controlled from zero to high speed, the theoretical analysis is verified by the simulation results based on Matlab, it shows that the proposed algorithms can improve the performances of position servo system compared with the conventional methods.


2021 ◽  
Author(s):  
Nabiya Ellahi

A method to control speed and rotor position with improved performance has been described in this research. Various techniques are taken into consideration with their detailed description. During this process new methods are also introduced with their pros and cons. The research includes a detailed study of progressive back-Emf sensing strategies. The relevant methods, which can support estimation, are the back Emf zero-crossing method, integration of voltage, and position estimation by flux and inductance. In this thesis, Extended Kalman filter is utilized for position and speed estimation. Firstly, DC voltage will be applied as an input. Extended Kalman Filter is used to perform state estimation while PID controller is employed to regulate the system state following the reference signal. The proposed solution leads to control of the ripple generated in speed and torque of Brushless DC Motor and improved performance.


2021 ◽  
Author(s):  
Nabiya Ellahi

A method to control speed and rotor position with improved performance has been described in this research. Various techniques are taken into consideration with their detailed description. During this process new methods are also introduced with their pros and cons. The research includes a detailed study of progressive back-Emf sensing strategies. The relevant methods, which can support estimation, are the back Emf zero-crossing method, integration of voltage, and position estimation by flux and inductance. In this thesis, Extended Kalman filter is utilized for position and speed estimation. Firstly, DC voltage will be applied as an input. Extended Kalman Filter is used to perform state estimation while PID controller is employed to regulate the system state following the reference signal. The proposed solution leads to control of the ripple generated in speed and torque of Brushless DC Motor and improved performance.


2013 ◽  
Vol 385-386 ◽  
pp. 843-847
Author(s):  
Yong Zhu ◽  
Kai Ping Feng ◽  
Yun Fei Wu

Brushless DC motor Sensorless control is the future development trend, Based on TI Companys DSP chip TMS320F28335 type of brushless dc motor without position sensor control system designed in this paper, Its basic structure and working principle are introduced. The position detector of the brushless DC motor use back EMF zero-crossing detection method. The test results show that the system has good dynamic and static characteristics, the reliability of the motor running.


2013 ◽  
Vol 336-338 ◽  
pp. 750-754
Author(s):  
Qiang Wang ◽  
You Ren Wang ◽  
De Ming Kong ◽  
Yong Wu

This paper presents a novel method to improve the starting performance for sensorless brushless DC motor (BLDCM) with low cost, based on the principle of back electromotive force (BEMF). The commutation points are extracted from three phase terminal voltages achieved by AD converters integrated in the microprocessor. The phase delay caused by the detection circuit is compensated. The start process consists of alignment, accelerating, and switching. In the accelerating process, the commutation instants are determined by the zero-crossing points and phase delay table. The motor can be started reliably because of the closed-loop startup strategy. Experimental results have verified the effectiveness of the proposed method.


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