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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...
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...
Interior Permanent Magnet Synchronous Motors (IPMSM) are generally driven by the current control based on the vector control system. However, there exist harmonic components in the current control loop. For the harmonic current, suppression control methods using a repetitive control have been proposed. In the conventional repetitive control, the amount of memory for implementation has not been considered...
Focusing on the shortage of traditional PID control and fuzzy control, this paper has made the model of Permanent Magnet Linear Synchronous Motors (PMLSM). Then, a fuzzy PID controller has been designed to control the speed of PMLSM, and a simulation experiment is conducted in the last. The results of the experiment verify that fuzzy PID control is superior to PID control.
This paper presents a Flywheel Energy Storage System based on the Z-source inverter with maximum boost control. The proposed system can boost and generate a desired output voltage efficiently when low voltage of the generator is introduced due to the low flywheel speed. Z-source inverter has been identified to exhibit both voltage buck and boost capabilities in steady-state. In order to provide the...
This paper presents the position control of a DC motor using Fuzz Logic and PID Control algorithms. Fuzzy Logic and PID controllers are designed based on labview program, and the real - time position control of the DC motor was realized by using DAQ device. The experimental results demonstrate that the responses of DC motor with FLC show a satisfactory, well damped control performance.
Nowadays, a wind turbine generator (WTG) is required to provide control capabilities regarding an output power. Under this scenario, this paper presents a frequency control method by coordination control of the WTG and a battery using load estimation by a disturbance observer for isolated island. The load variation is reduced by the WTG using pitch angle control in low frequency domain and the battery...
Electric power steering system (EPS) has been developing rapidly and becomes one of the safe-critical systems in modern control system of cars. The tracking performance of control system is an important factor that affects the assistance of electric power steering system. In order to improve the overall performance of electric power steering, fuzzy logic control theory was applied to the development...
The vertical hoist system directly driven by permanent magnet linear synchronous motor (PMLSM). It eliminates auxiliaries such as the mechanical couplings, rotary-to-linear translators, and reduction gears, but any change or disturbance will be directly reflected to the motor and control syetem. It will cause large deterioration in the motion profile. In order to reduce the disturbances of load and...
Based on the mathematical model of the current source inverter (CSI) in the stationary alphabeta frame, this paper proposes advanced stationary frame voltage control methods for CSI with linear and nonlinear loads to achieve zero steady-state error respectively. The voltage control strategy based on a special resonant controller for CSI with linear loads is firstly analyzed in detail, on the basis...
Nowadays, DC motor drives are widely used in industry for drive systems such as conveyors and hydraulic servo motors. The performances of DC motor control systems are reduced by the effect of DC motor variable torque. The control system of a DC motor will increase the electric current in a DC motor to maintain a desirable speed when the DC motor receives the variable torque or disturbance torque....
This paper gives an overview about motion control of induction motor and also presents the simulation and experiment of induction motor controller using method of voltage/frequency control. In this paper, the voltage/frequency (V/Hz) control principle is used to the speed controller for 3-phase AC induction motor. The DSP (TMS320F2812) controller is used to read the stator flux of motor (the AC machine...
An variable universe fuzzy control system was designed to control the position of a permanent magnet linear synchronous motor (PMLSM) intelligently considering nonlinear and parameters time-variation. By the analysis of dynamic equation of permanent magnet linear synchronous motors, a position controller for permanent magnet linear synchronous motor is carried out based on the variable universe fuzzy...
This paper describes realization of a fast current control system of permanent magnet synchronous motor (PMSM) based on model predictive control (MPC). This current controller directly selects one of the switching modes of a PWM inverter, while conventional one generates voltage reference regarding an inverter as ideal amplifier. The problem with selecting the switching mode to output is formulated...
The speed tracking and load disturbance regulation are contradictory elements, Two-degree-freedom(2 DOF) Internal Model Control (IMC) method is applied to solve the contradiction, but the 2 DOF is only used in a single output control system now. This paper presents the structure of 2 DOF-IMC for multiple output adjusting speed drive system of Synchronous Machine(SM), The controllers of air-gap-flux...
Based on the studying of the AC adjustment speed system and the complicated AC motor as controlled object, the method of fuzzy controller based neural-network is proposed in this paper. Simulations show that this method improved the ability of self-learning and anti-jamming of the AC adjustment speed system. The resumptive time of rotate speed in neural-network fuzzy control system is shorter than...
The bearingless induction motor is a strong-coupled complicated nonlinear system. The decoupling control of the torque and radial suspension forces is the base of the stable operation of the motor. In this paper, the principle of radial suspension force is expounded. The mathematics models of the rotation part of the motor and radial suspension force are presented. Then, two control system based on...
The vibration originated from the rotor's unbalance mass impacts on the current oscillation. As the rotor rotating at high speed, Power amplifier circuit will be burned down by excessive control current. While vibrating force transfers to frame, which causes the system vibration and influence the dynamic properties and safe operation. So unbalance compensation on the rotating machine is necessary,...
A BLDCM's PID controller and its system simulation are investigated in this paper. At first, the mathematics model of the motor control system is established, so that the system simulation is carried out respectively. And then, a PID controller is used to control the speeds between the two BLDCM, and the sine wave and triangle wave are selected to validate the effect of simulation. Finally, through...
Proportional, integral and differential are defined as a neuron respectively, combined with neural network in this paper. PID neural network (PIDNN) is built and the structure of PIDNN is also simple. Using the PID neural network, the strong coupled time-varying system can be decoupled and controlled easily. The doubly fed hydro-generator system is a novel type of hydraulic generation system. Considering...
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