Dynamic simulation of brushless DC drive considering phase commutation and backemf waveform for electromechanical actuator
01 Oct 2008-pp 1-6
TL;DR: In this article, a model of brushless dc motor drive considering behavior of the motor during commutation and waveform of backemf, for dynamic simulation of Electromechanical Actuator (EMA) under MATLAB/Simulink environment is proposed.
Abstract: This paper proposes a model of brushless dc motor drive considering behaviour of the motor during commutation and waveform of backemf, for dynamic simulation of Electromechanical Actuator (EMA) under MATLAB/Simulink environment Ideally trapezoidal backemf is considered in simulations for BLDC motor, which gives a constant torque Practically, torque ripple exist, mainly due to emf waveform imperfections, current ripple and phase current commutation Hence, an error can occur between real value and the simulation result First a simple mathematical model of the BLDC drive is developed The motor model is then simulated using MATLAB/Simulink, with sinusoidal and trapezoidal waveforms of backemf A comparison study of results of both the cases is done Finally the bldc motor model is integrated with the other models of the EMA and a dynamic simulation of the EMA is obtained
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27 Jun 2011
TL;DR: A model of brushless DC motor considering behavior of the motor during commutation, with development of simple mathematical model of the BLDC motor with sinusoidal and trapezoidal waveforms of back-EMF is proposed.
Abstract: The paper proposes a model of brushless DC motor considering behavior of the motor during commutation. The torque characteristic of BLDC motor presents a very important factor in design of the BLDC motor drive system, so it is necessary to predict the precise value of torque, which is determined by the waveforms of back-EMF. After development of simple mathematical model of the BLDC motor with sinusoidal and trapezoidal waveforms of back-EMF the motor is simulated in the MATLAB/Simulink environment. Based on analysis of the time responses a comparison study of results of both BLDC motor types is presented in Graphical User Interface of MATLAB environment.
62 citations
Cites background or methods from "Dynamic simulation of brushless DC ..."
...Several simulation models have been proposed for the analysis of BLDC motor [1], [4], [5]....
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...The BLDC motors have many advantages over brushed DC motors and induction motors [1]....
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...Therefore the BLDC motor can be employed in applications requiring high speed [1], [3]....
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26 Sep 2012
TL;DR: Progress in power electronics, microcontrollers, new materials and advances in numerical modeling have led to development of new types of electrical machines and in field of electrical drives to realization of complex control algorithms.
Abstract: Since the first appearance, the fields of electrical machine and drive systems have been continuously enriched by introduction of many important topics. Progress in power electronics, microcontrollers, new materials and advances in numerical modeling have led to development of new types of electrical machines and in field of electrical drives to realization of complex control algorithms. Their verification is usually done by simulation during system design, thus the effort is concentrated to development of simulation models.
17 citations
01 Jan 2016
TL;DR: In this article, Fuzzy Logic Controller (FLC) is proposed to eliminate the overshoot and to produce a fast speed response of brushless DC motor with nonlinear nature.
Abstract: Brushless DC motors (BLDCM) are most popular because of their higher efficiency, less maintenance and precise control characteristics. However, this motor has nonlinear nature and can be affected easily by the parameter change and disruption. For any automobile and industrial applications, it is essential to govern the speed accurately. Because of their fixed gain values, high peak overshoot and high settling time the conventional PI controllers are inadequate to control this motor accurately. In this paper, to resolve the complications coupled with the typical PI, Fuzzy Logic Controller (FLC) is intended to eradicate the overshoot and to produce fast speed response of motor. The mathematical modeling of BLDCM along with the controller has been deduced for a 10 kW BLDC motor. The simulations are done in Matlab/Simulink environment for validating characteristics of FLC.
13 citations
Cites background from "Dynamic simulation of brushless DC ..."
...INTRODUCTION The BLDC motor (BLDCM) is more prominent in different industries because of their higher power density, high efficiency, less maintenance, high ruggedness and a far range of speed control [1]-[2]....
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TL;DR: In this paper, the identification of a direct current motor using experimentally measured transient processes of the motor starting and running-down at a no-load driving torque is discussed, based on the equation error method, which was chosen for its ability to work with noisy data.
Abstract: The paper deals with the identification of a direct current motor using experimentally measured transient processes of the motor starting and running-down at a no-load driving torque. The identification is based on the equation error method, which was chosen for its ability to work with noisy data. The major point of the method is that the data of the experimentally obtained measurements are reciprocally associated with the differential equations defining the analysed object. The paper discusses the process and the results of identification.
6 citations
TL;DR: The work reported here was aimed at improving the practical efficiency of the model-based development and integration of electromechanical actuators by focusing on the key practical issues in modelling the electric motor, power electronics, and mechanical power transmission.
Abstract: The work reported here was aimed at improving the practical efficiency of the model-based development and integration of electromechanical actuators. Models are proposed to serve as preliminary design, virtual prototyping, and validation. The first part focuses on the early phases of a project in order to facilitate the identification of modelling needs and constraints, and to build a top-level electromechanical actuator model for preliminary studies and sub-specification. Detailed modelling and simulation are then addressed with a mixed view on the control, power capability, and thermal balance. Models for the power chain are firstly considered by focusing on the key practical issues in modelling the electric motor, power electronics, and mechanical power transmission. The same logic is applied to the signal and control chain with practical considerations concerning the parameters of the controller, its digital implementation, the sensors, and their signal conditioning. Numerous orders of magnitude are provided to justify the choices made and to facilitate decision-making for and through simulation activities.
6 citations
Cites background from "Dynamic simulation of brushless DC ..."
..., motor drive [4], control performance [5], or health monitoring [6,7])....
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References
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TL;DR: A phase variable model of the BDCM is developed and used to examine the performance of a BDCm speed servo drive system when fed by hysteresis and pulsewidth-modulated (PWM) current controllers, indicating that the small- and large-signal responses are very similar.
Abstract: For ptI see ibid, vol25, no2, p265-73 (1989) The authors develop a phase variable model of the BDCM (brushless DC motor) and use it to examine the performance of a BDCM speed servo drive system when fed by hysteresis and pulsewidth-modulated (PWM) current controllers Particular attention was paid to the motor large-signal and small-signal dynamics and motor torque pulsations The simulation included the state-space model of the motor and speed controller and real-time model of the inverter switches Every instance of a power device turning on or off was simulated to calculate the current oscillations and resulting torque pulsations The results indicate that the small- and large-signal responses are very similar This result is only true when the timing of the input phase currents with the back EMF (electromotive force) is correct The large-signal and small-signal speed response is the same whether PWM or hysteresis current controllers are used This is because, even though the torque pulsations may be different due to the use of different current controllers, the average value which determines the overall speed response is the same >
672 citations
07 Oct 1990
TL;DR: In this paper, an analytical study concerning the torque undulation due to phase commutation on brushless DC motors is presented, showing that the relative ripple is independent of current, varies with speed, and may reach 50% of the average torque.
Abstract: An original analytical study is developed concerning the torque undulation due to phase commutation on brushless DC motors. The results indicate that the relative ripple is independent of current, varies with speed, and may reach 50% of the average torque. The amplitude of the torque undulation and the duration of the commutation are analyzed, showing how this affects the torque-speed curve of the drive. Simulation and experimental results are presented that validate the theoretical analysis. >
323 citations
"Dynamic simulation of brushless DC ..." refers background in this paper
...Hence, an error can occur between real value and the simulation result[3][4]....
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01 Jan 2000
TL;DR: In this article, the integration and testing of the EPAD electromechanical actuator (EMA) on the SRA was discussed, as well as its integration with the F/A-18 flight control system.
Abstract: Development of reliable power-by-wire actuation systems for both aeronautical and space applications has been sought to eliminate hydraulic systems from aircraft and spacecraft and thus improve safety, efficiency, reliability, and maintainability. The Electrically Powered Actuation Design (EPAD) program was a joint effort between the Air Force, Navy, and NASA to develop and fly a series of actuators validating power-by-wire actuation technology on a primary flight control surface of a tactical aircraft. To achieve this goal, each of the EPAD actuators was installed in place of the standard hydraulic actuator on the left aileron of the NASA F/A-18B Systems Research Aircraft (SRA) and flown throughout the SRA flight envelope. Numerous parameters were recorded, and overall actuator performance was compared with the performance of the standard hydraulic actuator on the opposite wing. This paper discusses the integration and testing of the EPAD electromechanical actuator (EMA) on the SRA. The architecture of the EMA system is discussed, as well as its integration with the F/A-18 flight control system. The flight test program is described, and actuator performance is shown to be very close to that of the standard hydraulic actuator it replaced. Lessons learned during this program are presented and discussed, as well as suggestions for future research.
134 citations
TL;DR: In this article, a discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented, which includes modeling of the interaction between these machines and their attached power conditioners.
Abstract: A discrete time model for simulation of the dynamics of samarium cobalt-type permanent magnet brushless dc machines is presented. The similation model includes modeling of the interaction between these machines and their attached power conditioners. These are transistorized conditioner units. This model is part of an overall discrete-time analysis of the dynamic performance of electromechanical actuators, which was conducted as part of prototype development of such actuators studied and built for NASA-Johnson Space Center as a prospective alternative to hydraulic actuators presently used in shuttle orbiter applications. The resulting numerical simulations of the various machine and power conditioner current and voltage waveforms gave excellent correlation to the actual waveforms collected from actual hardware experimental testing. These results, numerical and experimental, are presented here for machine motoring, regeneration and dynamic braking modes. Application of the resulting model to the determination of machine current and torque profiles during closed-loop actuator operation were also analyzed and the results are given here. These results are given in light of an overall view of the actuator system components. The applicability of this method of analysis to design optimization and trouble-shooting in such prototype development is also discussed in light of the results at hand.
110 citations
16 Jul 2000
TL;DR: In this article, a new simulation model of the BLDC motor with nearly real back EMF waveform is proposed and through the simulation, the validity of the proposed model is shown for a three-phase BLDC motors.
Abstract: A BLDC motor with the characteristics of high speed and high power density has been more widely used in industrial areas. As for the design of the motor drive system, a simulation method has been used for the drive system, and the controller of the BLDC motor has become more complicated and precise. The torque characteristic of a BLDC motor is a very important factor in the design of the motor drive system, so it is necessary to predict the precise value of torque, which is determined by the back EMF waveform. The conventional simulation model of BLDC motor is obtained by approximation of real back EMF waveform to ideal trapezoidal waveform. But as the shapes of slot, skew and magnet of BLDC motor are various subject to design purposes, the real back EMF waveform is to some degree deviant from the ideal trapezoidal waveform. As a result, when using the ideal trapezoidal waveform, the error occurs. As a consequence, in order to lessen such an error, the model of the BLDC motor with a real back EMF waveform is needed instead of its approximation model. In this paper, for the reduction of error in simulation, a new simulation model of the BLDC motor with nearly real back EMF waveform is proposed and through the simulation, the validity of the proposed model is shown for a three-phase BLDC motor.
89 citations
"Dynamic simulation of brushless DC ..." refers background in this paper
...Hence, an error can occur between real value and the simulation result[3][4]....
[...]
...One of the models found real backemf waveform more similar in appearance to a sinusoidal shape[4][5]....
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