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This paper proposes a single-pulse operation control for Matrix converters where the single-pulse operation is controlled to synchronize with the output frequency. There are two known problems for the synchronize control; firstly, the beat-frequency components occurs in the output current, and secondly, the input power factor should be controlled as unity. To solve these problems, this paper proposes...
In this paper, a new type of controller is proposed for series connected PV inverter for grid voltage compensation. The inverter operates during the day time as an active power compensator as well as load voltage regulator under grid voltage sag, swell or even under normal condition. The compensating voltage provided by the inverter is added vectorially in series with the grid voltage in such a way...
A field-weakening control is required in order to achieve high power output and stable control in the voltage saturation region. In this paper, a voltage phase-operated field-weakening control and a frequency-compensation control are presented. The voltage phase operation control adjusts the voltage phase command with the voltage maintained at the maximum value. Therefore the proposed control can...
This paper proposes a novel soft-switching two-phase boost converter to behave as a power factor correction pre-regulator. This regulator is able to turn on both the active power switches at zero voltage to reduce their switching losses and evidently raise the conversion efficiency. The two boost converters are identical, and their operation analysis and design for the regulator become quite simple...
A new control method based on State-Dependent Ricatti Equation (SDRE) control for single phase PWM inverter with FPGA based hardware controller is proposed. In the deadbeat control approach, robustness for the variation of the system parameter is the key issue. Some approaches were proposed, for example, a single-rate deadbeat control with disturbance observer, a multi-rate deadbeat control, and so...
This work presents a design optimization procedure for Series Parallel Resonant Converters (LCC) employed in Electrostatic Precipitator (ESP) power supplies. The system parameters, such as resonant tank elements, are selected in order to reduce semiconductor losses when a typical ESP energization operation range is considered. Here, the sum of the power losses of the switches are predicted for a set...
This paper proposes a high efficiency driving circuit for multiple high-brightness light emitting diode (HB-LED) lamps with dimming feature. A high-frequency half-bridge series resonant inverter is adopted as a current driver. By appropriately controlling the frequency of the active switches and the resonant tank, the lamp currents can be regulated effectively. On the other hand, the LED lamps can...
Power electronics technology is becoming an increasingly important aspect of today's power distribution system. It is the key interface to connect distributed energy resource (DER) to the utility and the local loads. With the increased penetration of power electronics based distributed generation (DG) systems, the power quality requirements are becoming more stringent. On the other hand, if controlled...
A new control method based on State-Dependent Ricatti Equation(SDRE) control for DC-DC converter with FPGA based hardware controller is proposed. Deadbeat control is one effective digital control approach, and the robustness for the variation of the system parameter is the key issue. Some approaches were proposed, for exsample, a single-rate deadbeat control with disturbance observer, a multi-rate...
This paper introduces two torque ripple suppression control methods for permanent magnet synchronous motor. With a system identification technique, the system model from compensating current input to torque detection output can be expressed as the speed-adjustable 1-dimension complex vector in the coordinate system synchronizing with the torque ripple frequency. The first method introduces a periodic...
This paper presents a hysteresis based current control PWM named “Hi-PWM”, which has several advantages such as quick response of current, less fluctuation of switching frequency and less harmonic components. In this paper, the improvement of Hi-PWM is explained, which realizes switching frequency control and output voltage calculation. This paper also shows simulation results driving induction motor...
Speed and current closed loops control represent the heart of any advanced AC servo drive. These inner loops usually feature high-dynamic feedback control, with possible axes decoupling and a straight feedforward action of the back-electromotive force (back-EMF). More sophisticated techniques as single-rate or multi-rate control could be exploited for both speed and current closed loops, and their...
This paper presents a sensorless sinusoidal driving method of permanent magnet synchronous motors (PMSMs) for fans and pumps by V/f control. The proposed method is a simple method that controls DC-link peak currents by a single shunt resistor and a peak detector. Due to the damping factor from the square torque load characteristics of fans and pumps, the drives of PMSMs for fans and pumps by V/f control...
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