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Permanent-magnet synchronous-motor is a multi-variable, non-linear, strong coupling system that is highly sensitive to the outer interfere and inter perturbation. To improve the system robustness, the adaptive back-stepping control of permanent magnet synchronous motor based on slide mode observer is put forward. Based on the mathematic model of permanent magnet synchronous motor and the theory of...
A bearingless induction motor is a multi-variable, strong-coupled and nonlinear system. To start with, according to the working principles of bearingless induction motor, the equations of torque force and radial suspension forces are inferred. Then the state equations of motor based on rotor flux orientation is set up. Secondly, the reversibility of system based on the mechanical equations is discussed...
The constant tension control of the anchor chain is important for the safety of the moored ships. The key component of the anchor windlass system is the induction motor which is a multi-variables, coupled nonlinear system, and is difficult to control. To surmount this problem, the inverse system method is introduced to linearize the induction motor into a decoupled linear system, and accordingly linear...
As brushless DC motor (BLDCM) is a multivariable and non-linear system, using conventional PID control can not obtain satisfied control effect. In this paper, a grey PID controller model based on grey theory is presented, and the controller is applied into the BLDCM speed control. In this system, if only use classic PID controller, cannot overcome the shortcomings of parameter uncertain. So we use...
In this paper, a self-bearing induction motor with additional windings in the stator slots is proposed. The self-bearing induction motor is a strong coupled, multivariable and nonlinear system. The torque and radial suspension forces are coupled each other through airgap flux linkages. The decoupling control of the torque and radial suspension forces is the base of the stable operation of the motor...
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