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Description: Paper about a new close loop current model flux observer to estimate the rotor flux, position and velocity of an induction machine. The current observer includes carefully designed sliding mode functions which are derivative of the fluxes along the and axes. Therefore, when the estimated current converges to the measured one, the flux estimation is a mere integration of the sliding mode function.
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Size: 484352 |
Author: gregbur |
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Description: 异步电机的精确控制和速度辨识是交流传动系统中重要问题。在该仿真系统中，电机转速采用易于检测的电机定子电压和电流得到转速MRAS辨识算法来估算。由于速度辨识算法中电压模型的纯积分环节会引起的误差积累和漂移问题，采用改进积分型转子磁链估算模型来解决。-The precise control and the speed identification of AC motor are the very important issues on AC drive system.In this system, induction motor is controlled by the direct torque control, stator flux is estimated by u-n model observer that is effective in the full range of speed, motor speed is estimated by MRAS speed identification algorithm that is depended on the voltage and the current of motor stator easily detected. The modified integral rotor flux estimation model is used to solve the problem that the normal model can be affected by the error accumulation and drift of integral calculation in the voltage model of conventional speed identification algorithm.
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Size: 21504 |
Author: 王晨 |
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Description: ：针对电动汽车永磁同步电机无位置传感器控制系统，在两相静止坐标系( —B)内将滑模观测器法
与MRAS结合，提出了基于模型参考自适应的滑模观测器，并利用自适应律估计永磁同步电机的转子速度。仿真
和试验表明无位置传感器控制方法是切实可行的。
关键词：电动汽车永磁同步电机无位置传感器控制 自适应滑模观测器-This paper presents a new adaptive slid—mode observer for electric vehicle permanent magnet
synchronous motor(PMSM)sensorless control system，which is combined with the sliding mode observer and model
reference adaptive method in the two—phase stationary reference frame． The speed of PMSM rotor is estimated by
adaptive law．Simulation and experimental results show that the sensol ]ess control method is practical and feasible。
Key words：EV PMSM position sensor]ess control ASMO(adaptive slid—mode observer)
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Size: 488448 |
Author: fmx |
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Description: In This paper, the authors propose a Sensorless Direct Torque and Flux Control (DTFC) of
Induction Motor (IM) using two approach intelligent techniques: Mamdani Fuzzy Logic (FL)
controller is used for controlling the rotor speed and Artificial Neural Network (ANN) applied in
switching select stator voltage. We estimated the rotor speed by using the Model Reference
Adaptive Systems (MRAS). The control method proposed in this paper can reduce the torque,
stator flux and current ripples and especially improve system good dynamic performance and
robustness in high and low speeds-In This paper, the authors propose a Sensorless Direct Torque and Flux Control (DTFC) of
Induction Motor (IM) using two approach intelligent techniques: Mamdani Fuzzy Logic (FL)
controller is used for controlling the rotor speed and Artificial Neural Network (ANN) applied in
switching select stator voltage. We estimated the rotor speed by using the Model Reference
Adaptive Systems (MRAS). The control method proposed in this paper can reduce the torque,
stator flux and current ripples and especially improve system good dynamic performance and
robustness in high and low speeds..
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Size: 3107840 |
Author: aa |
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Description: 首先提出了基于微分几何控制理论的双馈发电机非线性多输入多输
状态反馈解藕控制方案，通过非线性坐标变换和非线性状态反馈，使双
发电机的磁链和转速两个子系统实现了动态完全解藕。其次采用基于定
磁场定向的双馈发电机矢量控制，实现定子侧有功功率和无功功率的解藕
为了消除交叉藕合电动势对发电机参数的影响，采用内模控制解藕控制
案，使系统具有良好的输出动态性能。最后在分析双馈发电机的数学模
和矢量控制的基础上，提出了一种基于模型参考自适应方法的定子、转
磁链观测、发电机转速估计和转子电阻辨识算法，应用Lyapunov原理证
了估计的收敛性，并应用于上述解藕控制方案中。在对算法进行理论推
的基础上，应用Matlab/simulink，对各个算法和系统进行了仿真，检验了
算法和控制方案的可行性。
-First proposed nonlinear multi-input multi-input state feedback the decoupled control programs through nonlinear coordinate transformation and nonlinear state feedback control theory based on differential geometry doubly-fed generator, dual generator flux and speed sub-systems to achieve the dynamic completely decoupled. Secondly, based on the fixed magnetic field oriented vector control of doubly-fed generator stator side active power and reactive power decoupling in order to eliminate the cross-coupling of the electromotive force of the generator parameters using the internal model control decoupling control case, so that the system which has good dynamic performance. Finally, in the analysis of the doubly-fed generator based on the mathematical model, and vector control, a method based on the model reference adaptive stator, turn flux observer, generator speed estimation and rotor resistance identification algorithm using the Lyapunov principle permit estimated convergence, and appl
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Size: 6056960 |
Author: zhangjie |
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Description: 详细说了双馈风机三相短路时的情况，并且着重分析了短路电流的表达形式以及最大值出线时刻，在此基础上提出了Crowbar电阻的取值方法。-In case of three-phase short circuit fault occurring at the terminal of a doubly-fed induction generator ( DFIG ), the rotor current characters of DFIG are analyzed from the viewpoint of the flux linkage, and the expression of the rotor
current is deduced together with the estimated expression of the
maximum rotor current. Based on above analysis, the max rotor currents and their appearing times with different Crowbar resistances are found, and the appropriate Crowbar resistance value is set for the 1.5 MW DFIG.
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Size: 386048 |
Author: Blogflyer |
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Description: 通过测量非导通相的反电势波形，运用KALMAN滤波器，估计出转子的位置-By measuring the non-conduction phase of the BEMF waveform, using KALMAN filter, the estimated rotor position
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Size: 89088 |
Author: 王静 |
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Description: 搭建永磁同步电机的直接转矩控制仿真模型
1，实测电流经过3/2变换得到alpha-beta轴上的电流；
2，估计模块中包含定子磁链和电磁转矩的估算，其中，定子磁链观测是采用基于转子位置和定子电流的磁链估计，电磁转矩直接在alpha-beta轴上计算；
3，转速调节模块和转矩调节模块直接采用PI调节器；
4，预期电压矢量估计模块，根据k时刻的磁链幅值与相位和k+1时刻的磁链幅值和相位计算出来的；
5，SVMPWM是空间电压矢量调制模块，实现空间任意角度任意大小的电压矢量，从而控制磁链轨迹近似为圆型；
6，逆变器模块和电机模块均采用系统自带的；-Build a permanent magnet synchronous motor direct torque control simulation model, the measured current after 3/2 transform the current alpha-beta axis estimated module included in the estimation of the stator flux and the electromagnetic torque, stator flux chain observation is based on the position of the rotor and the stator current flux estimates, the electromagnetic torque directly in the alpha-beta axis 3 speed controller module and torque adjustment module directly using the PI regulator expected voltage vector estimation module , calculated according to the time k flux amplitude the phase and k+1 time flux amplitude and phase 5, SVMPWM the space voltage vector modulation module voltage vector space at any angle of any size, thereby controlling the flux path approximate round inverter module and motor module system comes
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Size: 18432 |
Author: wk |
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Description: 考虑饱和凸极补偿的永磁同步电动机转子位置估计-Consider the position of permanent magnet synchronous motor rotor saliency compensation estimated saturation
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Size: 676864 |
Author: 唐俊伟 |
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Description: The training techniques, allows a wide range of use of the asynchronous machine with good
performance, tell her great robustness, reliability and electromagnetic low cost. The vector control
strategy takes into account the dynamic structure of the machine to have training systems robust high
performance. In the sensorless speed control of induction motors for the information of the rotor speed
and extracted the electrical terminals of the stator (voltage, current) .
Vector control of induction motors allows to reduce the control of an induction motor similar to that of
a machine with separate excitation current contained linear control, this control requires an estimate of
the amplitude and direction of flow in the rotor.
The estimated speed of the engine, which uses the MRAS technique based on reactive power, has been
proposed and used in this work to achieve this goal. -The training techniques, allows a wide range of use of the asynchronous machine with good
performance, tell her great robustness, reliability and electromagnetic low cost. The vector control
strategy takes into account the dynamic structure of the machine to have training systems robust high
performance. In the sensorless speed control of induction motors for the information of the rotor speed
and extracted the electrical terminals of the stator (voltage, current) .
Vector control of induction motors allows to reduce the control of an induction motor similar to that of
a machine with separate excitation current contained linear control, this control requires an estimate of
the amplitude and direction of flow in the rotor.
The estimated speed of the engine, which uses the MRAS technique based on reactive power, has been
proposed and used in this work to achieve this goal.
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Size: 204800 |
Author: zakary |
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Description: Abstract—This paper presents a new 12-step sensorless drive for
brushless dcmotor based on back-electromotive force (back-EMF)
differences, which are estimated the disturbance observer
(DOB) structure. Availability of rotor position information with
a resolution of 30° and commutation without phase shift are the
advantages of using the back-EMF differences. Unlike the conventional
methods that obtain part of the back-EMF signal the
manipulation of three phase voltages, the proposed DOB structure
can access the entire back-EMF profile. By designing a proper
low-pass filter in the DOB structure, the back-EMF difference can
be well detected with lower sensor noise. Compensation of delay
commutation introduced by the filter is also discussed. Experiment
results showed that the proposed sensorless drive is capable of running
themotor in lower speed, and performs better under different
speed and load torque as compared with the conventional method.-Abstract—This paper presents a new 12-step sensorless drive for
brushless dcmotor based on back-electromotive force (back-EMF)
differences, which are estimated the disturbance observer
(DOB) structure. Availability of rotor position information with
a resolution of 30° and commutation without phase shift are the
advantages of using the back-EMF differences. Unlike the conventional
methods that obtain part of the back-EMF signal the
manipulation of three phase voltages, the proposed DOB structure
can access the entire back-EMF profile. By designing a proper
low-pass filter in the DOB structure, the back-EMF difference can
be well detected with lower sensor noise. Compensation of delay
commutation introduced by the filter is also discussed. Experiment
results showed that the proposed sensorless drive is capable of running
themotor in lower speed, and performs better under different
speed and load torque as compared with the conventional method.
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Size: 790528 |
Author: Maddy |
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Description: 无数直流电机无位置传感器速度控制。利用电机运行时产生的反电动势估算转子位置。(Sensorless speed control of numerous DC motors.The rotor position is estimated by the back electromotive force generated during the motor operation.)
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Size: 38912 |
Author: jipong
|
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Description: The paper deals with the application of the Extended Kalman Filter and the Extended Luenberger Observer
algorithms for the stator and rotor fault detection of the induction motor fed by PWM inverter. The induction motor
conditions are analyzed using estimated rotor and stator-winding resistance.
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Size: 1107968 |
Author: marwan_123
|
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Description: 基于EKF的三相PMSM无传感器矢量控制框图，EKF算法采用s函数进行编写，函数命名为EKF。其中，输入为电机在静止坐标系下的钉子电压和定子电流，输出为定子电流估计值，转速和转子位置(Based on EKF's three-phase PMSM sensorless vector control block diagram, EKF algorithm uses s function to write, and the function is named EKF. Among them, the input is the nail voltage and stator current of the motor in the static coordinate system, and the output is the estimated value of stator current, speed and rotor position)
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Size: 1059840 |
Author: 咿丫丫1234562 |
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