The paper is based on vector control research on field-weakening control strategy of induction motor. In field-weakening induction motor torque output declines,in order to improve dynamic performance,on the basis of t...
详细信息
ISBN:
(纸本)9781479984671
The paper is based on vector control research on field-weakening control strategy of induction motor. In field-weakening induction motor torque output declines,in order to improve dynamic performance,on the basis of the existing voltage closed-loop field-weakening control strategy,the torque current tracking error is handled on the calculation of the reference excitation current in field-weakening region,so as to improve the tracking ability of current and torque of the motor output properties. Use MATLAB/SIMULINK simulation model of induction motor field-weakening control system. System simulation and experimental results will be proved the feasibility and effectiveness of the method.
Compared with speed sensor vector control, traditional speed sensor-less vector control has many advantages, such as lower cost, higher reliability. But it also has many shortcomings at low speed, such as a lowly accu...
详细信息
ISBN:
(纸本)9781479984671
Compared with speed sensor vector control, traditional speed sensor-less vector control has many advantages, such as lower cost, higher reliability. But it also has many shortcomings at low speed, such as a lowly accurate speed, weak load capability. The above shortcomings partly block the large-scale application of speed sensor-less vector control. The fundamental reason is that most of traditional flux observation methods depend on the voltage model and EMF. In this paper, the traditional arithmetic of speed sensor-less vector control is improved. It abandons the voltage model to improve low speed performance, so it can be used in different working conditions.
This electronic document is a Photovoltaic power generation can be divided into off-grid mode and grid-connected mode. Hybrid photovoltaic inverter which is composed by combining these two kinds of working modes is th...
详细信息
In order to achieve microgrid's operation economical optimality, the grey prediction with residual modification is used to make a short-term prediction about wind and load power in specific period at first. Then m...
详细信息
A novel hovering control methodology for a stratospheric airship is presented by using path following approach in the presence of unknown wind. First, the dynamic model of the airship used for controller design is int...
详细信息
ISBN:
(数字)9781624103179
ISBN:
(纸本)9781600869624
A novel hovering control methodology for a stratospheric airship is presented by using path following approach in the presence of unknown wind. First, the dynamic model of the airship used for controller design is introduced. Then, the hovering control is transformed into the path following control by expressing the wind field in the state equation, which avoids the difficulty of guaranteeing system stability in strong wind for other stabilization methods. The designed control system finally possesses a cascaded structure which consists of a guidance loop, an attitude control loop and a velocity control loop. An observer is proposed based on the vehicle kinematics to estimate the unknown wind field. Stability analysis shows that the controlled closed-loop system is globally asymptotically stable and the sway velocity which cannot be directly controlled converges to zero. Simulation results for the stratospheric airship to hovering in a certain position are illustrated to verify effectiveness of the proposed method.
A cyclical trajectory planning method for a permanent magnet spherical motor (PMSM) with multiple degrees of freedom in three-dimensional space is proposed. First of all, its mechanical structure is introduced and dyn...
详细信息
Capacitive sensing has been proven valid for locomotion mode recognition as an alternative of popular electromyography based methods in the control of powered prostheses. In this paper, we analyze the characteristics ...
详细信息
This paper deals with the finite-time stability and stabilization for continuous-time linear stochastic time-varying systems. Several necessary and sufficient conditions and a sufficient condition for finite-time stab...
详细信息
In this paper, the effectiveness of hybrid bacteria foraging optimization (BFO) algorithm and particle swarm optimization (PSO) algorithm have been tested for multi-loop robust controller design in discrete-time netwo...
详细信息
暂无评论