Description: 詳細介紹了開關電源的設計,再励磁回路串接约为励磁绕组电阻值10倍的附加电阻来构成闭合电路，把同步电动机的定子直接接入电网，使之按异步电动机启动，当转速达到亚同步转速（95%）时，再切除附加电阻。-details of the switching power supply design, another exciting loop SERIES excitation winding resistance of about 10 times the value of additional resistance to constitute a closed circuit, put synchronous motor stator directly connected to the network, so that it initiated by the induction motor, When speed synchronous speed to Asia (95%), removal of additional resistance again. Platform: |
Size: 2311239 |
Author:楊清 |
Hits:
Description: 詳細介紹了開關電源的設計,再励磁回路串接约为励磁绕组电阻值10倍的附加电阻来构成闭合电路，把同步电动机的定子直接接入电网，使之按异步电动机启动，当转速达到亚同步转速（95%）时，再切除附加电阻。-details of the switching power supply design, another exciting loop SERIES excitation winding resistance of about 10 times the value of additional resistance to constitute a closed circuit, put synchronous motor stator directly connected to the network, so that it initiated by the induction motor, When speed synchronous speed to Asia (95%), removal of additional resistance again. Platform: |
Size: 2311168 |
Author:楊清 |
Hits:
Description: 本系统基于反馈控制思想，由交直流转换电路、DC-DC变换器、步进电路模块和显示模块4个模块电路构成开关稳压电源。交直流转换电路整流部分采用全波桥式整流电路形式，DC-DC变换器以TL494有主核心设计并加上简单滤波电路及RC放电回路所构成的回路控制器。它能把脉冲宽度变化的信号转换成与脉冲宽度成正比变化的直流信号，进而实现闭环单回路控制。由单片机控制
数字定位器X9241的电阻,进而控制输出电压。显示模块由LCD1602构成。
-Based on feedback control of the system of thought, from AC-DC converter circuit, DC-DC converters, stepper circuit module and display module 4 module circuit switching power supply. AC-DC converter circuit using full-wave rectifier part of the circuit form of bridge rectifier, DC-DC converter to TL494 have the main core of the design and add a simple RC filter circuit and discharge circuit posed by the loop controller. It can change the pulse width signals into changes with the pulse width is proportional to the DC signal, and thus realize the closed-loop single-loop control. By the single-chip microcomputer to control the number of locator X9241 resistance, thereby control the output voltage. LCD1602 constituted by the display module. Platform: |
Size: 52224 |
Author:苏永生 |
Hits:
Description: 基于感应电机的转子电阻预估计的无速度传感器的直接转矩控制技术。控制电机的一种很先进的控制方法。-Based on the induction motor rotor resistance of the pre-estimation of the speed sensorless direct torque control technique. Motor control a very advanced control methods. Platform: |
Size: 433152 |
Author:ligw |
Hits:
Description: 异步电动机转子串电阻分级启动过程的MATLAB仿真大家一起学习-Rotor induction motor to start the process of classification Series Resistance MATLAB simulation we study together Platform: |
Size: 106496 |
Author:张莹 |
Hits:
Description: The Extended kalman filter (EKF) has been found wide application in the sensorless control of induction motor (IM) because of its good steady and dynamic behaviour,disturbance resistance, and fast convergence. This paper presents a novel speed sensorless field-oriented control scheme of Induction motor using extended kalman filter. Platform: |
Size: 503808 |
Author:lakhdar |
Hits:
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. Platform: |
Size: 14336 |
Author:王晨 |
Hits:
Description: 定转子电阻在线辨识的感应电机转速估计方法Online identification of stator and rotor resistance of the induction motor speed estimation method-Online identification of stator and rotor resistance of the induction motor speed estimation method Platform: |
Size: 484352 |
Author:dd888 |
Hits:
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. Platform: |
Size: 386048 |
Author:Blogflyer |
Hits:
Description: 绕线式异步电动机带负荷启动，其转子串联电阻分级投切-Wound rotor induction motor with a load start, its rotor graded series resistance switching Platform: |
Size: 15360 |
Author:房子 |
Hits:
Description: DC dynamic braking is obtained when the stator of an induction motor running at a speed is connected to a dc supply.dc current flowing through the stator produces a stationary magnetic field.Motion of rotor in this field induces voltage in the rotor winding.Machine therefore works as a generator.Generated energy is dissipated in the rotor circuit resistance,thus giving dynamic braking. Platform: |
Size: 10240 |
Author:ramin |
Hits:
Description: The doubly fed induction generator (DFIG) is widely
used in wind energy. This paper proposes a model-based predictive
controller for a power control of DFIG. The control law is derived
by optimization of an objective function that considers the control
effort and the difference between the predicted outputs (active and
reactive power) and the references. The prediction was calculated
using a linearized state-space model of DFIG. As the generator
leakage inductance and resistance information were required for this control method, the influence of the estimation errors for these
parameters was also investigated. Simulation results are presented to validate the proposed controller Platform: |
Size: 1675264 |
Author:ali |
Hits:
Description: MATLAB Code for Speed Control of three phase Induction motor using Variable Rotor Resistance Platform: |
Size: 1024 |
Author:saeed |
Hits:
Description: The speed is controlled by changing the external resistance in the rotor circuit. It is assumed that induction motors operate under constant load conditions during changes of the external resistance. A mathematical model of the induction motor with wound rotor Platform: |
Size: 22841 |
Author:suri270 |
Hits:
Search - resistance induction