Shaoru Zhang

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Three new transformerless step-up DC-DC PWM converters are proposed. They put the switching structure into the step-up DC-DC converters to achieve higher voltage gain when the duty ratio is not extremely high, and the switching structure is composed of three inductors and six diodes (switched-inductors). The switched-inductors in the basic DC-DC converters(More)
Age-related macular degeneration (AMD) is the leading cause of irreversible blindness in elderly populations worldwide. Inflammation, among many factors, has been suggested to play an important role in AMD pathogenesis. Interleukin 17 (IL-17) is a proinflammatory cytokine that has been implicated in the pathogenesis of various autoimmune diseases. In the(More)
The three-phase three-level unity PF rectifier can be used to improve the power factor of a three-phase rectifier. However, its “critical input inductor” is calculated for the nominal load condition, both the power factor and total harmonic distortion are degraded in low-output power region. A novel strategy implementing reference compensation(More)
Conventional power system stabilizer (PSS) can improve the steady-state stability limit and increase the system positive damping. As known, it has some drawbacks such as the time-consuming tuning and non-optimal damping in the entire operating range. PI adaptive law in simple adaptive control (SAC) can overcome these drawbacks, but it can be only applied to(More)
A dynamical model with multi perturbation factors of unwinding tension was established by analyzing the web press experiment platform. A tension control simulation system was constructed whose actuator is a magnetic powder brake by using MATLAB. A fuzzy adaptive PID controller was designed, and compared with the traditional PID control through experiment.(More)
The three-phase three-level unity PF rectifier can improve the power factor of three-phase rectifier. However, both the power factor (PF) and total harmonic distortion (THD) are degraded in low-output power region, because its “critical input inductor” is calculated for the nominal load condition. A novel reference compensation current(More)
A conventional power-system stabilizer has some drawbacks such as the time-consuming tuning and non-optimal damping in the entire operating range. PI adaptive law in simple adaptive control (SAC) can overcome these drawbacks, but it can be only applied to the plants with almost strict positive realness and the computation of adaptive law is really(More)
Based on analyzing the shaftless multiple unit web press experiment platform, a precise color-alignment mathematical model was established in order to characterize register system and control it. A register control simulation system was constructed in MATLAB which actuator was a permanent magnet synchronous motor. Considering the nonlinear of servo motor, a(More)
It is the focus of the research on the bearingless motors to suspend the rotor stably by controlling rotor radial displacement. Without studying the relationship between the radial suspension force and rotor radial displacement, traditional control method for rotor radial displacement has some drawbacks such as the complexity of computation and the(More)