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In this paper, control strategies of a 22 MW / 27 MVA machine test bench using pumpback topology are introduced. The current loop design at extremely low pulse ratios (e.g. 600 Hz carrier frequency / 80 Hz load frequency) is developed. The system stability and dynamic response are analyzed. The challenges for high-power machine control with a sine filter and a transformer connected between the voltage-source-inverter...
Well designed data structure simplifies programming of complex systems and makes its application more efficient. The issue in proper data structure declaration in programmable logic controller (PLC) is what technique for describing parameters, commands and states of system to choose. For universal system implementation its data structure should be expandable according to the requirements of controlled...
A sliding mode variable structure controller for chaotic control in the permanent magnet synchronous motor (PMSM) is presented in this paper. The controller is deduced based on the Lyapunov function theory and the function switch control strategy. The angle speed of the PMSM can be flexibly adjusted according to the engineering requirement by the controller. The control method has powerful robust...
A bearingless permanent magnet synchronous motor (BPMSM) control system has a large number of control variables but has a small amount of data variables. So, adopting optimal coding scheme is demanded in its human-computer interaction. Based on the analysis of data format in serial port communication and data types of control variables, an optimal scheme of data split and combination and a coding...
A new hybrid permanent magnet motor combining permanent magnet with excitation windings is tested, which can weaken or strengthen the magnet flux control by adjusting the field winding current. In this paper, by analyzing regulation principle of the magnetic field and control theory obtained with both advantages of the permanent magnet DC machines and easy to get magnetic flux control, successfully...
In this paper, the coupling magnetic field model which the power magnetic bearing generated by interference between the rotation and levitation force is linear inverse system decoupling, and study PID control strategy on decoupling linearization system. According to the performance analysis and simulation of PID control system, it can be concluded that PID control system has quick response, high control...
As the SRD system is multivariable, highly coupled and nonlinear, it is difficult to get a satisfied result by the conventional control. In this paper, the adaptive fuzzy PID controller is designed as the speed regulator, by using the Simulink toolbox of the Matlab, the result shows that the controller can reduce the overshoot, improve the accuracy and possess good robustness.
Voice coil motor (VCM) is one of the linear electric machine which has faster transient response, higher accuracy. It is widely used in the field of high performance direct drive servo valve. The mathematic model of voice coil motor was analyzed and the position control system of direct driver valve that based on voice coil motor was designed. Against the disturbance in the system, a new position...
This paper proposed a PID method to control a driven pendulum. Driven pendulum is a suspended pendulum, which has a motorized propeller at the end of the stick. So it can be controlled with controlling the voltage given to DC motor. The characteristics of the transient response of this system such as overshoots and settling time are not acceptable. For example the settling time of this system is upwards...
In this paper, the finite-time stable control problem for the chaotic system of permanent magnet synchronous motor is studied. An active control method with dynamic active compensation is proposed, which makes the closed-loop system achieve approximately finite-time stable control. And a new observer is designed to solve the uncertainty. The approximate finite-time stability of the closed-loop system...
Power Factor Correction (PFC) is used in power systems operating from single phase AC to correct for the non linearity of the rectifier. Use of PFC in motor drives is increasing because of increased regulation from the power utility side. However, integration of PFC and field oriented control of motor on a single controller remains challenging from a processor bandwidth point of view while keeping...
In this work is presented a design and implementation of an intelligent controller applied to dynamic systems. The main objective is to design a management intelligent system that acts in the controllers of Direct current machine (DC) and thermo-eletric control systems drives. The purpose is to evaluate the performance of algorithms for intelligent control that integrate DC and thermal actuators to...
Virtual Instruments are new instrument type that combining hardware and software together. A virtual instrument system includes instrument hardware, concerned software and a computer. It can control a machine and get the operating parameter of a machine. An engine test bench was developed with VC++ basing on Virtual Instruments technology. The system can control an engine and a chassis dynamometer...
The multimodel and multicontrol approaches are two powerful techniques which are often useful in literature, to the analyse, the modeling and the control of complex systems. Indeed, the operating range of the process is partitioned into a set of operating regions. For each operation region a local model or/and controller is applied. The effective control applied to the process is a fusion of all these...
This paper presents an elegant technique for mitigating the output power fluctuations from a grid connected Opti-slip induction generator (OSIG), due to sudden wind gusts leading to input drive torque variations. The proposed technique has also been extended to control the amount of real power into the grid at the desired value. The control of OSIG is achieved using the basic principles of chopper...
In this paper, a direct torque control (DTC) of encoderless Synchronous Reluctance Motor (SynRM) drives is proposed based on emotional controller and space vector modulation. The proposed modern controller is called brain emotional learning based intelligent controller (BELBIC). The utilization of BELBIC is based on the emotion processing mechanism in brain, and is essentially an action, which is...
This paper presents the speed control scheme of indirect vector controlled induction motor (EVI) drive. Voltage source inverter type space vector pulse width modulation (SVPWM) is used for PWM controlling scheme. An intelligent based on Fuzzy PI controller is developed for controlling the torque component Iq current of an EVI. The complete vector control scheme of the IM drive incorporating the FLC...
Because of the asynchronousy of the control system caused by internal tension imbalance in the running of tri-motors driving conveyance line, this paper mainly discuss a practical program - synchronous automatic speed control system. In this system, the rotary encoder is adopted to detect the motors' speed, samples and analyses various motor speeds through the PLC and adjusts the motors' speed by...
When the speed is low or the encoder has a low precision, speed measured by backward difference method has obvious truncation error. This will arise ripple in the control system speed response. Speed filtering can decrease the ripple, but it's not good enough, and it also induces lag. A speed feedback method based on all-state observer was introduced to improve the speed feedback performance. Experiment...
The control system used in air compressor driven by brushless direct current (BLDC) motor was designed in this paper. Based on the analysis of resistance characteristic of air compressor and direct torque control method, a simple open loop control method used to change duty ratio was provided. Simulation and experiment showed that the fluctuation of Rotational speed had been sharply reduced and the...
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