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Travelling wave ultrasonic motors (TWUSM) experiences a growing interest due to features such as the high holding torque, high torque at low speeds and quiet operation for industrial applications. The speed control of TWUSM is carried out using techniques based on changing the frequency, amplitude and phase difference of the applied voltage. The dynamic speed characteristics of TWUSM vary depending...
This paper presents the comparison between PEM fuel cell and gas turbine. THE dynamic model of PEM fuel cell and gas turbine will be described. To control of voltage and frequency, control loop added to the PEM fuel cell model. For the gas turbine speed control loop added to its model. Dynamic model are used to determine response of PEM fuel cell and gas turbine to variation load. The results are...
In this paper, a multivariable nonlinear mathematical model of ultrasonic motor for speed control, which includes all the control variables of ultrasonic motor(the peak-topeak voltage, frequency and phase difference of two-phase driving voltages), has been presented. Ultrasonic motor has many excellent performance features such as high torque at low speed, quiet operation, no electromagnetic interference,...
In electrical network, control of output voltage and frequency are vital issue. In this article, it introduces the modeling and simulation of synchronous alternator in MATLAB and the linearization of it. The model of system is decomposed into electrical part and mechanical part according to the requirement of Linear Quadratic Regulator. The whole system is simulated using S-function. In the end, using...
In this paper, a motion control IC for linear motor drive X-Y table using FPGA (Field programmable gate array) technology is presented. Firstly, the mathematical model of the X-Y table is defined. Secondly, an adaptive fuzzy controller (AFC) is introduced and adopted in position loop of X-Y table to improve the motion tracking performance under unmodelled uncertainty condition. Thirdly, in implementation,...
The mathematical model of linear induction motor (LIM) based on slip frequency type vector control system is established. A self-adjusting fuzzy controller (SAFC) is designed as magnetic thrust adjuster of the motor. The speed of the motor is adjusted by control magnetic thrust of the motor. The scheme of the slip frequency type vector control system of the LIM is obtained by observing the magnetic...
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