A new simulation model of BLDC motor with real back EMF waveform
16 Jul 2000-pp 217-220
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.
Citations
More filters
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.
62Â citations
Cites methods from "A new simulation model of BLDC moto..."
...Several simulation models have been proposed for the analysis of BLDC motor [1], [4], [5]....
[...]
03 May 2007
TL;DR: The advanced model of brushless dc motor drives considered behaviour of commutation and waveform of back-EMF for comprehensive analysis and prediction of dynamic characteristics of BLDC motor drives.
Abstract: This paper proposes the advanced model of brushless dc motor drives considered behaviour of commutation and waveform of for dynamic simulation of automotive application under Matlab/Simulink environment. We need a model of BLDC motor drives that control algorithm and BLDC motor drive system can be designed and simulated as a point of system level. The model has to consider commutation phenomenon. A waveform of back-EMF of BLDC motor can be modified to depend on BLDC motor type. To satisfy above factors need a co-simulation technique with other circuit level simulation tools. However, there are severe constraints, i.e. simulation speed and interface with tools. The advanced model proposed in this paper considers behaviour of commutation and waveform of back-EMF for comprehensive analysis and prediction of dynamic characteristics of BLDC motor drives. The commutation phenomenon is implemented by functional behaviour description and back-EMF is modelled by pattern of waveform. The developed model is split into few parts with object-oriented manner for reusability and scalability. It is easily integrated with other models of automotive application.
61Â citations
Proceedings Article•
01 Jan 2011TL;DR: In this paper, a BLDC motor with ideal back-EMF is modeled and simulated in MATLAB/SIMULINK and a simulation model of the controller and BLDC drive are also presented.
Abstract: Automotive Industry is targeting sustainable transportation in near future. Therefore hybrid and electric vehicles are going to be popular due to their sustainability, energy saving and zero emission. Electric motors play significant role in EV's. In-wheel motor technology is being used in modern electric vehicles to improve efficiency, safety and controllability of vehicle nowadays. BLDC motor have been demanding as in-wheel motor in electric vehicles because of high efficiency, desired torque versus speed characteristics, high power density and low maintenance cost. In this paper BLDC motor with ideal back-EMF is modeled and simulated in MATLAB / SIMULINK. Simulation model of the controller and BLDC drive are also presented. In order to validate the model various simulation models are studied. Simulations results depict from developed model are satisfactory and show correct performance of model.
52Â citations
Additional excerpts
...To design of BLDC motor drive system, it is necessary to have motor model gives precise value of torque which is related to current and back-EMF [2]....
[...]
TL;DR: In this article, a brushless direct current (BLDC) motor-based elevator system is proposed for high-rise buildings, where dc micro-grid is established, and the overall closed-loop controller has been implemented using a Xilinx Spartan-3E field programmable gate array (FPGA).
Abstract: In recent days, utilization of the renewable energy sources has been emphasized in high-rise buildings, where dc microgrid is established. It is known that the brushless direct current (BLDC) motors have smooth speed control, high-power density, and less complexities in power converter and controller when operated with dc supply as compared to other electrical motors. Hence, this paper enunciates the scope of using BLDC motors for elevator systems suitable for operating with a dc microgrid. For analyzing the proposed BLDC motor-based elevator system, a MATLAB mechatronic simulation model has been developed by inserting various electrical and mechanical components. Four quadrant operation of the proposed elevator system has also been indicated with the simulation results. To demonstrate the successful working of the proposal, a prototype elevator system has been designed and developed in the laboratory. The overall closed-loop controller has been implemented using a Xilinx Spartan-3E field programmable gate array (FPGA). Experiments have been conducted for the upward and downward movement of the elevator cabin with and without load and the findings are given in this paper. Regenerative braking is also possible for the proposed system by employing a suitable gear mechanism in place of worm gear.
47Â citations
Cites background or methods from "A new simulation model of BLDC moto..."
...power density, and higher efficiency make these motors very suitable for replacing conventional motors in many systems [6], [7]....
[...]
...cite such advantages of a BLDC motor and also present a new simulation model that can be used for the analysis and design of BLDC motors [6]....
[...]
References
More filters
01 Jan 1974
TL;DR: A computer algorithm that computes the discrete Fourier transform much faster than other algorithms, is explained and examples and detailed procedures are provided to assist the reader in learning how to use the algorithm.
1,823Â citations
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 >
672Â citations