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Direct Drive Volume Control (DDVC) flange-type rotary vane steering gear is a greatly promising component to be applied in the controlling course and posture of vessel due to the superior advantages of compact structure, powerful vibration absorption, simple control and etc. However, the nonlinear friction is a main limit for DDVC flange-type rotary vane steering gear to meat the accuracy requirement...
According to the rotor flux oriented dynamic mathematical model from Induction motor, the speed can be estimated with synchronous speed based on the torque current differential. Combing with slip formula, in this paper we constitute speed sensorless vector control system of Induction motor with current hysteresis loop control inverter. The simulation results show that the control scheme is valid and...
In this paper, the vehicle equipped with electromechanical brake system is taken as the research objective, and the simulation and research on the control strategy of anti-lock brake system is done. Firstly, the force of the wheels is analyzed in cornering with braking, and the control strategy of anti-lock brake system is proposed based on the slip rate and BP neural network PID control. Then, the...
The current regulation based on the internal model control is applied to vector control of PMSM. It avoids the adjustment of two PI-parameters; moreover the IMC structure improves the characteristic of the current loop. Generally, the flux of PMSM is changing with the load current (torque). Simulation results under flux saturation considered and not considered show that the current internal model...
This paper demonstrated the dynamic behavior of DFIG wind turbine during grid balance and unbalance faults by using simulation results, the effect of voltage sag on DFIG wind turbine is discussed through comparing of the different voltage sag depth in a type of fault lengthways and comparing one type of fault with another breadthwise. The response characteristics of DFIG wind turbine under PCC voltage...
This paper presents an approach to utilize a passive impedance network in series at the stator side of a typical DFIG wind turbine for the purpose of voltage sag ride through. A control strategy that enables the passive impedance network to engage and stabilize the stator flux during grid voltage sag events has been studied. Simulation results demonstrates that electromagnetic torque and rotor current...
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