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This paper emphasizes on the small-signal behavior and stability analysis of bidirectional DC to DC converter. The bidirectional current capability of the switch eliminates the discontinuous conduction mode which leads to a simple analytic description of the switching converter. The small-signal model is considered to design the control parameters. The transient, stability analyses and closed loop...
The LC filter introduced to the AC side of three-phase current source PWM rectifier, brought leading power factor. In addition, because of the nonlinearity of the PWM rectifier, the satisfactory effect could not be obtained with the traditional PID control system under larger disturbance and changes of controlled object. This paper described the technology of Combining traditional PID control with...
The control scheme of parallel drive system of the dual Switched Reluctance machines based on fuzzy logic control is proposed and verified for the first time. The system consists of main machine, subordinate machine, main power converter, subordinate power converters, main controller and subordinate controller. The main controller is used for closed-loop rotor speed control of main machine, with the...
Based on the traditional hysteretic current control, this paper presents a control approach using switching frequency closed-loop. A switching frequency feedback link is introduced to control the switching frequency dynamically. It solves the problem of the volatile switching frequency in hysteretic current control, as well as the slow current response of the fixed switching frequency current control...
The circuit and corresponding steady state vectors' relationship of single-phase PWM rectifier using IGBTs (insulated gate bipolar transistors) is analyzed, and the mathematic model and controller structure are presented, the PI regulators of the current and voltage loops are designed respectively. The method based on the Matlab/Simulink Blocks is used to carry out the simulation for the control system...
The basic principle of space vector pulse width modulation (SVPWM) and a method of building two closed-loops vector control simulation model for permanent magnet synchronous motor (PMSM) are presented in this paper. At the same time, a new non-linear PID controller in speed closed-loop is studied. Simulation results show that it has good dynamic and static performances with no overshoot and small...
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