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Description: 异步电机直接转矩控制定子磁链估算方法的研究-Direct torque control induction motor stator flux estimation methods
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Size: 3379200 |
Author: wangmeng |
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Description: 变速恒频双馈风力发电系统的研究 采用定子磁链定向的矢量控制方法-VSCF doubly-fed wind power generation system using the stator flux-oriented vector control method
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Size: 2889728 |
Author: wangmeng |
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Description: 一种适用于感应电机的定子磁链优化的直接转矩控制技术。-One for induction motor stator flux-optimized direct torque control technique.
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Size: 373760 |
Author: ligw |
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Description: 为满足在电网发生故障时风电机组需保持与电网连接并向系统不间断供电的要求,提出
了双馈风力发电机的动态模型、变流器模型、变流器保护及电网模型,以研究双馈风力发电机的暂
态特性.以1·5MW SUT-1500双馈风力发电机为原型,由一个无穷大电源等效电网模型,变流器模
型采用定子磁链的定向电流矢量控制方法,利用PSCAD软件对双馈电机的暂态特性进行仿真.仿
真结果表明,矢量控制能够实现双馈电机的有功、无功解耦,并可改善系统的低压穿越能力.
-To meet the power failure to keep their wind turbine grid-connected uninterruptible power supply to the system requirements, proposed doubly-fed wind turbine dynamic models of converter model, inverter protection and network model to Study of double-fed wind generator transient characteristics. to 1.5 MW SUT-1500 double-fed wind turbine prototypes, by an infinite power grid equivalent model of converter model uses the stator flux orientation of current vector control methods, using PSCAD software to double-fed motor simulation of transient characteristics. The simulation results show that vector control can be achieved double-fed motor active and reactive decoupling, and can improve the system through the capacity of low-voltage.
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Size: 619520 |
Author: mengxianghua |
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Description: my first PMSM drive model based on DTC, by using stator resistance Rs to measure the flux. a very simple model
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Size: 16384 |
Author: Alex |
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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: 该仿真模型是一种利用模糊控制器调节PWM信号占空比的异步电动机直接转矩控制的策略，即在传统异步电动机直接转矩控制的基础上，用模糊控制器代替传统DTC中的滞环比较器和空间电压矢量状态选择器来细分控制规则，最后控制逆变器的开关，以减小转矩和磁链脉动，从而改善交流异步电机伺服系统的动、静态品质，使整个系统具有较强的鲁棒性和自适应性。-A method of the stator resistance estimate which based on the fuzzy neural network was proposed and the motor speed is estimated by MRAS speed identification algorithm based on the stator voltage and the current that can be easily detected. Besides, a new design of fuzzy direct torque control system of induction motor was introduced in this paper, which based on strategy of modulating the duty cycle to decrease the torque and stator flux ripple. This design uses fuzzy control block to instead of the traditional space voltage vector selector to control the inverter switch which can improve the static and dynamic performances of AC asynchronous motors, which make the whole control system have strong robustness.
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Size: 14336 |
Author: 王晨 |
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Description: 介绍一种定子磁链的估计策略，很有参考价值的文献-Introduction of a stator flux estimation strategy worthy of literature
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Size: 414720 |
Author: 唐传胜 |
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Description: In this paper, a comparison is made between different
implementations of the three-level torque comparator
for a Direct Torque Control (DTC) based induction motor
drive. The DTC scheme controls stator flux and torque by
means of hysteresis comparators, respectively a two-level control
structure for the stator flux and a three-level comparator for
the electromagnetic torque. The standard three-level hysteresis
controller has a DC offset torque error. In this paper, an
additive implementation is investigated in order to remove this
DC offset error. The operational principles of the different
implementations are compared based on continuous and discrete
simulation results, which demonstrate the additional advantages
of the additive structure in a discrete implementation of the
control scheme.
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Size: 237568 |
Author: yasser |
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Description: This paper presents a new design of the torque and stator flux estimators for Direct
Torque control (DTC) for Field Programmable Gate Array (FPGA) implementation, which permit
very fast calculations. An alternative variable word-size approach in two’s complement fixedpoint
format is used for the implementation, in order to minimize calculation errors and the
hardware resource usage. The simulation results of DTC model in Matlab, which performed
double-precision calculations, are used as references to digital computations executed in FPGA
implementation. The Hardware-in-the-loop (HIL) method is used to verify the minimal error
between Matlab simulation and the experimental results, and thus the well-functionality of the
implemented estimators.
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Size: 435200 |
Author: T. H. Sutikno |
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Description: 实现了定子磁链定向的DQ坐标系下的双馈电机模型-Stator flux oriented to achieve the DQ coordinate system doubly-fed machine model
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Size: 1024 |
Author: 何 |
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Description: 采用Hopfield神经网络的改进异步电动机直接转矩控制方法，可以有效的降低电磁转矩、定子磁链和定子电流的波动。-Improved Hopfield neural network using asynchronous motor direct torque control method can effectively reduce the electromagnetic torque, stator flux and stator current fluctuations.
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Size: 438272 |
Author: 郝帅 |
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Description: 基于改进型磁链观测器直流励磁同步电机控制Based on the improved of stator flux observer of DC excitation synchronous motor control-Based on the improved of stator flux observer of DC excitation synchronous motor control
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Size: 797696 |
Author: mp33 |
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Description: 电机的直接转矩控制，用神经网络替代定子磁链观测器-Motor direct torque control using the neural network to replace the stator flux observer
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Size: 110592 |
Author: 王刚 |
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Description: stator-flux oriented control of an induction motor under simulink
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Size: 9216 |
Author: said |
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Description: This paper proposes a programmable low pass
filter (LPF) to estimate stator flux for speed sensorless stator
flux orientation control of induction motors. The programmable
LPF is developed to solve the dc drift problem associated with a
pure integrator and a LPF. The pole of the programmable LPF is
located far from the origin in order to decrease the time constant
with the increasing speed. In addition, the programmable LPF
has the phase/gain compensator to estimate exactly stator flux
in a wide speed range. Consequently, the drift problem is much
improved and the stator flux is exactly estimated in the wide speed
range. The validity of the proposed programmable LPF is verified
by speed sensorless vector control of a 2.2 [kW] three-phase
induction motor.
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Size: 205824 |
Author: sajitsanit |
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Description: A comparison of stator flux linkage estimators for a direct torque controlled PMSM drive
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Size: 2039808 |
Author: badro |
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Description: On the stator flux linkage estimation of an PMSM with extended kalman filters
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Size: 1147904 |
Author: badro |
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Description: stator flux oriented control of doubly fed induction generator
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Size: 832512 |
Author: sun |
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Description: 直接转矩控制的实质是用空间矢量的分析方法，以定子磁场定向方式，对定子磁链和电磁转矩进行直接控制的(The essence of DTC is to directly control stator flux linkage and electromagnetic torque by means of space vector analysis and stator magnetic field orientation.)
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Size: 29696 |
Author: 工藤新一xi |
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