On the question of the choice of designing coefficients for direct current electric motors

2007 ◽  
Vol 78 (1) ◽  
pp. 37-39
Author(s):  
S. B. Tokarev
Keyword(s):  
Direct Current ◽  
Electric Motors

scholarly journals A controller for brushless direct current electric motors. Part 2. Software

2020 ◽  
Author(s):  
Zenon Syroka
Keyword(s):  
Motor Control ◽  
Direct Current ◽  
Control Method ◽  
Electric Motors ◽  
Brushless Motors ◽  
Control Module ◽  
Brushless Motor ◽  
Data Bus ◽  
Control Modules ◽  
Universal Controller

A universal controller for brushless direct current (BLDC) motors was designed in the presented article. The system is controlled from the user console where operating parameters are set by the user. Signals are transmitted by cables to microcontrollers which control and monitor electric motors. Microprocessors communicate via a data bus. The controller contains the user console module and the motor control module. The user console module generates commands, and motors are controlled and monitored by the control module. Motor control modules operate independently, and each brushless motor has a dedicated control module. Brushless motors can be controlled in bipolar or unipolar mode. The control method is selected by the operator. The user console and motor controllers communicate via the I²C bus.  

scholarly journals Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals

2014 ◽  
Vol 14 (5) ◽  
pp. 257-262 ◽  
Author(s):  
A. Glowacz
Keyword(s):  
Induction Motor ◽  
Direct Current ◽  
Nearest Neighbor ◽  
Acoustic Signals ◽  
Electric Motors ◽  
Bayes Classifier ◽  
Multiple Signal Classification ◽  
Non Invasive ◽  
Invasive Method ◽  
Neighbor Classifier

Abstract In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.

scholarly journals EXPERIMENTAL DATA ACQUISITION OF VIBRATION FORCE IN DIRECT CURRENT MOTOR FOR MINI SUMO ROBOT

2019 ◽  
Vol 7 (1) ◽  
pp. 48-57
Author(s):  
Ali Sinan Cabuk
Keyword(s):  
Direct Current ◽  
Vibration Analysis ◽  
Reaction Force ◽  
Dc Motor ◽  
Electric Motors ◽  
Accelerometer Sensor ◽  
Vibration Effect ◽  
Machine Failure ◽  
Motor Test ◽  
Periodic Movement

Vibration is the oscillating or periodic movement of electric motors from its position to a certain point, which has effect on performance. The vibration of electrical motor is essential causes of machine failure. Therefore, reaction force of electric motors is the most important parameter for their working life. It is monitoring and minimize the vibration generated by the electric motor. One of the objectives of this study is to present that forced vibration analysis is compatible technique for diagnosing electromagnetic and mechanical problems in electric motors. In this study aims at vibration analysis on Direct Current (DC) motor, that is the most preferred motors for robotic application. DC motor used in this study has 15 W output power, 400 min-1 shaft speed and 12 V terminal voltage, which is widely implemented in robot competition. Vibration forced was measured with accelerometer sensor on the motor. Test vibration results of the motor were checked it whether limiting value or not. In this study, vibration effect of DC motor in mini sumo robot is presented with during competition and smooth road conditions.

scholarly journals ESTIMATING THE PROBABILITY OF THE EMERGENCY OPERATION OF THE QUARRY ELECTRIC LOCOMOTIVE TRACTION ELECTRIC DRIVE

World Science ◽  
2021 ◽  
Author(s):  
Artem Artemenko ◽  
Oleksii Chornyi ◽  
Valeriy Sydorenko ◽  
Serhii Serhiienko ◽  
Yurii Zachepa ◽  
...  
Keyword(s):  
Direct Current ◽  
Electric Drive ◽  
Emergency Operation ◽  
Electric Motors ◽  
Electric Locomotive ◽  
Electrical Parameters ◽  
Traction Electric Drive

The paper deals with the problem of the assessment of the functionality of the multi-motor direct current traction electric drive of the quarry electric locomotive. The problem of the failure of electric drive motors because of extremely unsatisfactory state of the rail tracks and the wear of wheel pairs is analyzed. Taking into account the number of the existing repaired electric motors the probability of fitting up the traction electric drive with the electric motors with the widest electrical parameters variety is determined.

Dead Zone Compensation in Direct Current Motors: A Review

2020 ◽  
Author(s):  
Leonardo Pires de Souza ◽  
Rodrigo Zelir Azzolin
Keyword(s):  
Neural Networks ◽  
Control Systems ◽  
Direct Current ◽  
Sliding Mode ◽  
Dead Zone ◽  
Control Methods ◽  
Electric Motors ◽  
Motor Movement ◽  
Dc Motors ◽  
The Dead

As one of the types of electric motors, DC motors are presented, a class of motors that is commonly used in torque and speed control systems. The control of these motors in real applications is affected by system nonlinearities, such as the dead zone, which limits the motor to fulfill its task with precision since it disables the motor movement for certain applied inputs. Thus, control methods need to be implemented to compensate it. Three modern control methods generate good compensation results: artificial neural networks, fuzzy logic and sliding mode control. Thus, this study aims to perform a review of the available literature on the use of these methods in the compensation of the dead zone in direct current motors.

scholarly journals A controller for brushless direct current electric motors. Part 1. Electrical and electronic design

2020 ◽  
Author(s):  
Zenon Syroka
Keyword(s):  
Motor Control ◽  
Direct Current ◽  
Control Method ◽  
Electric Motors ◽  
Brushless Motors ◽  
Control Module ◽  
Brushless Motor ◽  
Data Bus ◽  
Control Modules ◽  
Universal Controller

A universal controller for brushless direct current (BLDC) motors was designed in the presented article. The system is controlled from the user console where operating parameters are set by the user. Signals are transmitted by cables to microcontrollers which drive and monitor electric motors. Microprocessors communicate via a data bus. The controller contains the user console module and the motor control module. The user console module generates commands, and motors are controlled and monitored by the control module. Motor control modules operate independently, and each brushless motor has a dedicated control module. Brushless motors can be controlled in bipolar or unipolar mode. The control method is selected by the operator. The user console and motor controllers communicate via the I²C bus.

Direct or alternating?

2021 ◽  
Vol 14 (2) ◽  
pp. 148-150
Author(s):  
S. A. Kropachev
Keyword(s):  
United States ◽  
20Th Century ◽  
Direct Current ◽  
The United States ◽  
Alternating Current ◽  
Early 20Th Century ◽  
Wireless Charging ◽  
Electric Motors ◽  
Nikola Tesla ◽  
Current Systems

The article is devoted to the so-called "war of currents", which unfolded in the United States in the late 19th-early 20th century. The winner of this "war" was a talented Serbian inventor Nikola Tesla. He professed the ideas of alternating current. He was opposed by the famous American businessman and scientist T. Edison. Enterprises of the latter produced machines running on direct current. It made a big profit. After a number of conflicts, Tesla, who worked for Edison, left his company and organized a business of his own jointly with an industrialist D. Westinghouse. Tesla's ideas and projects won a landslide victory. The development of direct current systems ended in the late 1920s, despite the efforts of T. Edison. N. Tesla was at the origins of alternating current systems, the appearance of electric motors, robotics, wireless charging devices and much more. Today, the ideas of the great Serbian inventor, even the most fantastic ones, are experiencing a rebirth.

Inter-Method Reliability of Pulse Volume Related Measures Derived Using Finger-Photoplethysmography

2018 ◽  
Vol 32 (4) ◽  
pp. 182-190 ◽  
Author(s):  
Kenta Matsumura ◽  
Koichi Shimizu ◽  
Peter Rolfe ◽  
Masanori Kakimoto ◽  
Takehiro Yamakoshi
Keyword(s):  
Light Intensity ◽  
Adverse Effects ◽  
Light Source ◽  
Direct Current ◽  
Resting State ◽  
Current Component ◽  
Psychophysiological Measures ◽  
Pulse Volume ◽  
Optical Paths ◽  
Sensor Positions

Abstract. Pulse volume (PV) and its related measures, such as modified normalized pulse volume (mNPV), direct-current component (DC), and pulse rate (PR), derived from the finger-photoplethysmogram (FPPG), are useful psychophysiological measures. Although considerable uncertainties exist in finger-photoplethysmography, little is known about the extent of the adverse effects on the measures. In this study, we therefore examined the inter-method reliability of each index across sensor positions and light intensities, which are major disturbance factors of FPPG. From the tips of the index fingers of 12 participants in a resting state, three simultaneous FPPGs having overlapping optical paths were recorded, with their light intensity being changed in three steps. The analysis revealed that the minimum values of three coefficients of Cronbach’s α for ln PV, ln mNPV, ln DC, and PR across positions were .948, .850, .922, and 1.000, respectively, and that those across intensities were .774, .985, .485, and .998, respectively. These findings suggest that ln mNPV and PR can be used for psychophysiological studies irrespective of minor differences in sensor attachment positions and light source intensity, whereas and ln DC can also be used for such studies but under the condition of light intensity being fixed.

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