The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Control Method of Sensorless Brushless DC motor Based Neural Network is proposed by analysis of indirect position detection of DC Brushless motors' principles. Dynamical BP neural network model is built to identify the relation of phase voltage, phase current and rotor position of Brushless DC Motor. Network parameters gradient descent is employed to rectify error method in order to update the network...
In this paper, a new motor control input and controller for small-scale electrically powered multirotor aerial vehicles is proposed. The proposed scheme is based on controlling aerodynamic power as opposed to the rotor speed of each motor-rotor system. Electrical properties of the brushless direct current motor are used to both estimate and control the mechanical power of the motor system which is...
One of the important objects in Submarines is reducing or eliminating acoustic noise, where results Submarines hidden from scopes of enemies. BLDC motors are used in submarines, and Cogging torque and unbalanced magnetic forces in BLDC motors are important source of acoustic noise. This paper is a study on the Cogging torque for BLDC motors, with 14 poles and 12 slots. Cogging torque is calculated...
Brushless motors, which finds diverse applications in industries and automation systems, combine high reliability with high efficiency at a lower cost in comparison with the conventional brushed motors. The reliability and efficiency can be further improved by incorporating a multiphase design which however increases the system cost and the inverter circuit complexity. This paper proposes a five phase...
This paper deals with analysis and design of a speed controller for PMBLDC motor. The brushless DC motor has permanent-magnets on rotor and the stator windings are wound such that the back electromotive force is trapezoidal in nature. The control unit used is a PI controller, which governs the duty cycle of the PWM pulses applied to the switches of the inverter to run the motor at desired speed. The...
A robust sensorless back-EMF detection method for brushless dc (BLDC) motor drive system is presented in this paper. This estimated back-EMF is used to deduce the rotor position and the angular velocity of the rotor. Sliding Mode Observer (SMO) which is low sensitive to parameter variations is proposed to estimate the phase-to-phase trapezoidal back-EMF in a BLDC motor by the measurement of stator...
Direct Torque Control (DTC) is a method to control the torque in variable frequency drives. This paper describes sensorless DTC of brushless dc (BLDC) motor drive operating in constant torque region under two phase conduction mode to get instantaneous torque control. Sliding Mode Observer (SMO) which is low sensitive to parameter variation is proposed to estimate the phase-to-phase trapezoidal back-EMF...
This paper presents a method for sensorless rotor position detection of BLDC drive based on Back EMF which is indirectly obtained from motor terminal voltages along with PWM switching noise. Low pass filter is used to eliminate high frequency noise. The low pass filter used in position detection circuit also produces phase lag on back EMF signal which deteriorates the accuracy. This phase lag problem...
An experimental single phase BLDC motor has been fabricated in laboratory for gaining an insight into its operation. The inner stator is having 20 slot stampings. It has a vertical shaft and the rotor is in a form of a cylindrical hub rotor. Strip magnets are bounded on the inner surface of hollow cylindrical hub using epoxy resin. The controller is a Hall IC with latch. The solid state control of...
In this paper, we present modeling of two phase Permanent Magnet BrushLess DC (PMBLDC) motor in Maxwell 3D software. Electromagnetic simulations and performance analysis of proposed model is carried out. Torque and back EMF equations for proposed model are derived and verified through simulations. Electromagnetic simulations include flux flow pattern, parametric analysis and transient analysis. Simulations...
In this paper, design methodology for BLDC motor to minimize torque ripple in accordance with winding connection and control method has been proposed. Design methodology has been investigated via performance analysis according to Y-connection and Δ-connection, respectively, by Finite Element Method(FEM). In addition, applying proposed overlapping control method on designed models, the validity in...
This paper presents the design of Quad-Copter flying machine using Atmel microcontroller. The scope of this project involves both hardware design and software implementations. Potentiometer is used as an input device to produce analog signal. The analog signal is converted to digital form using Analog to Digital Converter (ADC) in Atmel microcontroller. The digital value is used by the microcontroller...
Brush less Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are used in industries such as Appliances, Automotive, Aerospace, Medical, Industrial Automation Equipment and Instrumentation. BLDC motor with matching servo amplifiers offer many features than other motion control systems, like broader speed range, operation in special environments and mechanical...
Permanent magnet brushless DC machines are widely used due to various advantages such as high efficiency and high torque density, and therefore compactness and long expected lifetime. All of these benefits are of major interest when designing a drive for a small fan cooler application of a few watts. This paper presents the design investigations of a small single-phase permanent magnet brushless DC...
The well-known electromechanical motor model applied to permanent magnet motors relies on several simplifications which seriously limit its ability to rigorously model state-of-the-art sensor-less drives. Two distinctive assumptions made in its derivation are that saturation effects imposed by the magnetic core are neglected and that the motor is assumed to be non-salient. As a consequence, modern...
The UAV quadrotor is considerably difficult to be controlled due to its inherently unstable and complex multi-variable properties. To realize the control, a nonlinear dynamic model is firstly derived and formulated. A control approach employing hierarchical multiple-layer structure is then developed. The detailed hardware components, software as well as the working principle of the system are described...
Multi-phase (more than three-phase) motor drive systems have attracted much attention in recent years due to some inherent advantages which they offer when compared to the three-phase counterpart. Presently the grid power available is only limited to three-phase so the supply to multi-phase motors is invariably given from power electronic converters. For applications operating with electric cars,...
This paper presents the performance analysis of a solid exterior rotor brushless direct current motor (BLDC), which is produced as a washing machine motor. Experimental results of the motor are presented and a dynamic model of the motor is modeled by using Finite Element Method. Various performance characteristics are obtained and compared to the experimental results.
This paper discusses the rotating analysis for 18-slot/16-pole Permanent Magnet Synchronous Motor (PMSM) using Finite Element Method. The PMSM is applied for Light Electric Vehicle (LEV) which has about 200 kg net mass and maximum velocity of 30 km/h. The motor is located in the wheels of the LEV. The motor is built using three main components i.e. laminated steel iron, coils, and Neodymium-Iron-Boron...
In the absence of position sensor, the brushless DC motor controller often used back electromotive force (EMF) zero crossing detection method to obtain the rotor position and speed during operation. Back EMF detection circuit noise and interference introduced by the PWM signal will affect the Back EMF zero-crossing detection signal, resulting in fluctuations and drift, using conventional MT solution...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.