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The finite element method (FEM) is presented in this paper to research the noise of axial flux surface mounted permanent magnet synchronous machine (AFSMPMSM), and the noise of AFSMPMSM is analyzed and calculated by using analyzing software of FEM. The two results of FEM calculation and sample machine's experiment are contrasted, and it is proved correctly of using this FEM to calculate the noise...
This paper introduce the technology of electromotor control and protective electrical appliance intelligent, using the artificial fish swarm algorithm (AFSA) which is based on genetic algorithm to optimize the calculate of the intelligent ac contactor. According to the result of optimization design, we have made a showpiece, after the test and experimentation of the prototype; finally we got results...
Integrating repetitive control and RBF neural network PID control , a novel control scheme for DC servo system is proposed for the high accuracy of Oscillating Mirrorsystem . The repetitive control is used to improve the steady-state characteristi of the control serosystem and enhance its ability to withstand the disturbance with same frequency; the RBF neural network PID control is used to enhance...
This work describes a novel modeling and simulation approach of brushless DC motor control system depended on analysis of it's mathematical model. The brushless DC motor ontology model, the voltage type inverter circuit model, the hysteresis current tracking comparative model and the PID speed controller model were constructed in the Simulink environment of Matlab. S-function was used in modeling...
In order to increase the flexibility of control for stepper motor, a pulse generator based on FPGA is proposed in this paper. Draw State transition diagram by analysis the Principle of pulse generator, and realized in FPGA using Very High-speed Integrated Circuit Hardware Description Language (VHDL). The simulate results show that pulse output in FPGA is consistent with the requirements. The module...
This article describes the necessity of a prototype flume model for making wave. It uses a inverse system method to decouple a asynchronous motor dynamic model which is based on the two-phase stationary coordinate system. And it establishes the dynamic model of a prototype wave flume by means of PD control. Then the model of the prototype wave flume are simulated by using MATLAB, which is to determine...
This paper presents a kind design of AC servo control system with IRMCK201 and TMS320F2812, introduces basic structure and working principle of the IRMCK201, describes the device selection and hardware design of the servo system, shows the configuration of the IRMCK201's control parameters and the software design of TMS320F2812. To analyze the working methods and job characteristics of the servo system,...
A novel neural network, retina neural network (RNN) is put forward, and its definition, network structure, parameters, and characteristic are presented. After training it using a set of samples, an ideal training waveform is obtained, which is a great guide for future research. Moreover, a model of permanent magnet synchronous motor (PMSM) PI controller is constructed based on RNN to test drive performances...
The stator flux observer is a key part in the method of Direct Torque Control (DTC). However, the accuracy of the stator flux estimation directly affected the performance of DTC. The traditional induction motor stator flux observation method have been analyzed in This paper. And for the Shortcomings of existing methods, a on-line identification methods based on Radial Basis Function(RBF) have been...
A new asymmetrical hybrid multilevel inverter topology is presented. The new topology improve the number of the output voltage level greatly through cascading two five-level H-bridge cells. A hybrid PWM strategy is proposed for the new topology that the switches of different cells works in different switching frequency to low switching losses. Lastly, an experimental 17-level asymmetrical inverter...
In this paper is presented the structure and working principle of the cascaded H-bridge multilevel converter with PWM rectifier and phase-shift transformer. Using the leak inductance as the filter reactor of the PWM rectifier can reducing the volume and cost of the converter; the phase-shift secondary side of the transformer can eliminate the current harmonics caused by the single power unit, restraining...
The DSP chip TMS320LF2812 used in the digital motor control(DMC) was introduced and its application in the VVVF system was discussed. The thesis introduced the actuality and principle of frequency conversion and the mostly characteristic of DSP. A digital motor control system using V/F control and space vector technique based on DSP was developed. The system adopted DSP to realized the complicated...
This paper describes a fuzzy control system and simulation for ultrasonic motors. Although ultrasonic motor has much merit, such as small size, light weight, high precision, fast control dynamics and large driving force when low speed, etc. However, the nonlinear dynamic characteristic and the accurate mathematical model is difficult to obtain. So the traditional control method is almost no effect...
Abstract-Due to nonlinear electromagnetic characteristics of Switched Reluctance Motor (SRM), as well as complexity of voltage and current waveforms, it is of great difficulty to control SRM optimally and compute power losses. A novel optimal control strategy of Non-Energy Returnable Current Chop (NERCC) was proposed, which is suitable for high power SRM drive. This method can obtain current waveform...
According to the requirements of a DC motor speed control system, a Dual-Closed-Loop Speed Regulator has been designed, with the AT89C51 and TMS320LF2407A is the MCU of this regulator. The function of TMS320LF2407A is sampling and regulating the speed of the DC motor, and the function of AT89C51 is inputting and displaying the speed of the DC motor. The hardware block diagram, program charts, and...
We used to crank connecting shaft neck in the center of the neck as the origin of work piece coordinate system. Through the offset of the work piece coordinate, we made use of the method of the coordinate value in keeping with the real coordinate diameter or the relative location value of the work piece center. We designed a kind of crankshaft NC dresser which consists of the Siemens servo semi-closed...
Swarm Intelligence is the one of the most efficient and emergent techniques for global optimization. Artificial Bee Colony Algorithm (ABCA) is one of the new swarm intelligent population-based meta-heuristic approaches, inspired by foraging behavior of bees for function optimization. To enhance the efficiency of ABCA optimizer this paper proposes a novel hybrid approach involving genetic algorithms...
For computer numerical control (CNC) machine tools, the double side air-cored permanent magnet linear servo motor (DAPMLSM) is suitable for high-speed and high-precision servo feed systems. But it also has thrust ripple caused by non-sinusoidal magnetic field distribution. Finite element analysis (FEA) was used to study motor characteristics, and the computer simulation results match well with the...
In this paper, because the induction machines (IM) are described as the plants of highly nonlinear and parameters time-varying, to obtain excellent control performances of IM and overcome the shortcomings of the fast modified variable metric optimal learning algorithm (MDFP) and back propagation (BP) learning algorithm of neural network, such as requiring derivation in the process of learning and...
Magnetic bearings can not only solve the bearing wear and life problems but also reduce the loss and noise of bearings. However, the strong non-linear and uncertainty of parameter of the magnetic bearings make the traditional PID controller difficult to ensure its long-term and stable operation. Based on the T-S fuzzy model, this paper presents a design method of magnetic bearing parallel-distributed...
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