scholarly journals Cascade-Type Pole-Zero Cancellation Output Voltage Regulator for DC/DC Boost Converters

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3824
Author(s):  
Sung Hyun You ◽  
Koo Bonn ◽  
Dong Soo Kim ◽  
Seok-Kyoon Kim
Keyword(s):  
Output Voltage ◽  
Closed Loop ◽  
Active Damping ◽  
Voltage Regulator ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Boost Converters ◽  
System A ◽  
Low Pass ◽  
Cascade Structure

This paper presents a novel output voltage regulator in the cascade structure under the consideration of both the parameter and load uncertainties. It leads to the first-order closed-loop inner and outer loop dynamics in the low-pass filter form by the pole-zero cancellation through the active damping injection, which is the main contribution of this study. Moreover, it is proved that the active damping injection level determines the disturbance rejection capability of the closed-loop system. A 3-kW DC/DC boost converter confirms the actual advantages from these two contributions.

The Design of the Single-Phase Inverter Based on DSP (TMS320F2812)

2014 ◽  
Vol 989-994 ◽  
pp. 3231-3235
Author(s):  
Zhao Xia Zhou ◽  
Jia En Huang
Keyword(s):  
Single Phase ◽  
Closed Loop ◽  
Optical Coupling ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Output ◽  
Low Pass ◽  
Loop Feedback ◽  
Closed Loop Feedback ◽  
Single Phase Inverter

This paper designs a single-phase inverter.Battery as a 12V DC input, and output for the 24V,50 HZ standard AC wave. The load is resistive.The power supply adopts the Boost booster and two full-bridge inverter transform. For the control circuit, the preceding Boost converter using tl494 chip control closed-loop feedback and for the inverter part, adopting the 6N137 to finish the optical coupling isolation.Then,through the DSP (TMS320F2812) to complete the output of SPWM modulation.And the modulated SPWM signal can drive chip IR211 conducting the full bridge inverter. Finally, through a low-pass filter output the standard sine AC inverter power.

Predictive Control of AC/AC Matrix Converter

2017 ◽  
Vol 8 (4) ◽  
pp. 1932
Author(s):  
Siti Hajar Yusoff ◽  
Nur Shahida Midi ◽  
Sheroz Khan ◽  
Majdee Tohtayong
Keyword(s):  
Predictive Control ◽  
Output Voltage ◽  
Experimental Studies ◽  
Matrix Converter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Current Controller ◽  
Voltage Controller ◽  
Low Pass ◽  
Switching State

<span>This work investigates the usage of Model Predictive Control (MPC) for a three phase conventional matrix converter with low pass filter at the input and output side. The conventional matrix converter has 3 input and 3 output which gives 27 switching state. From this design, a MPC is incorporate to control the output voltage and the input currents for all the phases. The design of the proposed controller is based on the input current controller and output voltage controller with load observer.  The proposed MPC using cost function will select the minimized switching state to be applied to next switching. This gives a sinusoidal output voltages and input currents. A simulation and experimental studies are presented to validate the proposed control scheme.</span>

A CMOS Fourth-Order 150Hz Low-Pass Filter for Sensor Applications

2013 ◽  
Vol 380-384 ◽  
pp. 3320-3323
Author(s):  
Chang Chun Dong ◽  
Nan Nan Liu ◽  
Zhan Peng Jiang
Keyword(s):  
Fourth Order ◽  
Cutoff Frequency ◽  
Cmos Process ◽  
Sensor Interface ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Sensor Applications ◽  
Low Pass ◽  
Cascade Structure ◽  
Simulation Results

A low-pass filter for the sensor is presented, which based on the linearized transconductance structure and the capacitance scaler schemes. The filter adopt fourth order cascade structure, and simulation by 0.5μm CMOS process. Simulation results for the filter show a cutoff frequency of 150Hz, while band ripple is less than 0.8 dB. The power consumption for the filter is only 1.6mW, meet the requirements of the sensor interface ASIC for low-pass filter.

Decentralized Vibration and Shape Control of Structures With Colocated Sensors and Actuators

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
A. H. Ghasemi ◽  
Jesse B. Hoagg ◽  
T. M. Seigler
Keyword(s):  
Shape Control ◽  
Closed Loop ◽  
Controller Design ◽  
Cutoff Frequency ◽  
Sensors And Actuators ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Unknown Disturbances ◽  
Low Pass ◽  
Model Parameter Uncertainty

This paper introduces a decentralized shape and vibration controller for structures with large and potentially unknown system order, model-parameter uncertainty, and unknown disturbances. Controller implementation utilizes distributed, colocated, and independent actuator–sensor pairs. Controller design requires knowledge of the relative degrees of the actuator and sensor dynamics and upper bounds on the diagonal elements of system's high-frequency gain matrix. Closed-loop performance is determined by a parameter gain, which can be viewed as the cutoff frequency of a low-pass filter. For sufficiently large parameter gain, the closed-loop performance is arbitrarily small. Numerical examples are used to demonstrate the application and effectiveness of the decentralized controller, and we present experimental results for a setup consisting of a cantilever beam with piezoelectric actuators and strain-gauge sensors.

scholarly journals Harmonic Suppression Strategy in Single-phase SPWM Based on Mixed Integer Nonlinear Programming

2019 ◽  
Vol 13 (5) ◽  
pp. 22
Author(s):  
Lubin Wu ◽  
Ziquan Liang ◽  
Weihua Li ◽  
Xiaoteng Wang
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Mixed Integer ◽  
Harmonic Suppression ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Integer Nonlinear Programming ◽  
Low Pass ◽  
Harmonic Components ◽  
Suppression Strategy

In single-phase bipolar SPWM inverter circuit, the output voltage contains high content of harmonic components. To solve this problem, we build a model of output voltage in single-phase SPWM bipolar inverter based on SPWM theory and Fourier series theory. Through theoretical analysis, calculation and plotting, we work out the distribution of harmonic in output voltage, investigate the relationship between amplitude modulation (AM) depth and harmonic components and finally determine a proper amplitude modulation depth to efficiently reduce harmonic components. To further reduce harmonic components of output voltage, we use LC low-pass filter. Then, based on the mathematical model of the filter and the distribution law of harmonics, we establish a mixed integer nonlinear programming to fully suppress harmonics and reduce switching losses. After searching for two times based on genetic algorithm, we work out the best frequency-modulation ratio and LC low-pass filter parameter. Finally in simulation, total harmonic distortion is reduced from 213.47 percent to 0.16 percent after harmonic suppression strategy implemented. The result has proved the effectiveness of the harmonic suppression strategy we applied, which can be used as a reference for output voltage harmonic elimination in single-phase SPWM inverter.

scholarly journals Dynamic Properties of Orientation to a Visually Fixated Target by Walking Colorado Beetles

1991 ◽  
Vol 158 (1) ◽  
pp. 149-164 ◽  
Author(s):  
ULRICH LÖNNENDONKER
Keyword(s):  
Time Course ◽  
Closed Loop ◽  
Dynamic Properties ◽  
Visual Orientation ◽  
Optomotor Response ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Density Peaks ◽  
Low Pass ◽  
Fixation Reaction

The dynamic components of the fixation behaviour of walking Colorado beetles were examined. The beetles walked on top of a locomotion compensator under closed-loop conditions. The fixation target was a yellow disk with small black stripes (‘Colorado dummy’). The paths of beetles walking towards the stationary dummy were characterized by oscillations, and were investigated by applying a fast Fourier transform to the turning-velocity time course. The power density peaks near 0.3 Hz with varying amplitude. Films of the fixation reaction revealed that this frequency was much slower than the stepping-pattern frequency of the beetles. During orientation to other stimuli (wind or gravity), the oscillations were not present, showing that they were not an artefact of the motor output. However, they were present in other forms of visual orientation, such as the optomotor response and during positive phototaxis. A frequency-response curve (Bode diagram) under closed-loop conditions was obtained for the fixation reaction by changing the dummy position sinusoidally and measuring the phase and amplitude of the tracking response. A simple model of this behaviour, including a low-pass filter and an integrator, describes the reaction. Hence, the reaction can be understood as the simple resonance behaviour of an underdamped closed-position loop. The question of whether this can explain zigzagging paths in other species is discussed. Note: Present address: Universität Kaiserslautern, FB Biologie, Abteilung Allgemeine Zoologie, D-6750 Kaiserslautern, Germany.

A Practical Fractional-Order Sinusoidal Oscillator Design and Implementation

2021 ◽  
pp. 2150231
Author(s):  
İbrahim Ethem Saçu
Keyword(s):  
Fractional Order ◽  
Closed Loop ◽  
Passive Components ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Design And Implementation ◽  
Sinusoidal Oscillator ◽  
Fractional Oscillator ◽  
Low Pass ◽  
Fractional Differentiator

In this study, a new sinusoidal fractional oscillator circuit in which the fractional low-pass filter and fractional differentiator form a closed loop has been introduced. The single series [Formula: see text] pair and Valsa method have been used to imitate the fractional-order capacitor. Two different sinusoidal signals with different phases are available at output ports. An integer version of the proposed oscillator is not possible, only the fractional version is valid, that is a noticeable feature. The introduced circuit has been simulated by employing SPICE software. The proposed fractional oscillator is also verified by implementing circuit with AD817ANs and passive components, experimentally.

scholarly journals Active Damping Injection Output Voltage Control with Dynamic Current Cut-off Frequency for DC/DC Buck Converters

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6848
Author(s):  
Sun Lim ◽  
Seok-Kyoon Kim ◽  
Yonghun Kim
Keyword(s):  
Output Voltage ◽  
Performance Enhancement ◽  
Active Damping ◽  
Buck Converter ◽  
Disturbance Attenuation ◽  
Design Parameters ◽  
Feedback Gain ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Steady State Current

With regard to DC/DC buck converter applications, the objective of this study is to expand the admissible range of the output voltage cut-off frequency while lowering the steady-state current cut-off frequency as possible. This study fortifies the inner loop by incorporating the novel subsystems such as an auto-tuner (for the dynamic current cut-off frequency) and active damping injection invoking the pole-zero cancellation nature with the particular designed feedback gain structure. The outer loop active damping control renders the closed-loop speed transfer function to be a first-order low-pass filter with the cooperation of the specially structured design parameters; in addition, it provides time-varying disturbance attenuation. The experimental results obtained for a 3-kW buck converter validate the feasibility of the proposed technique by showing a 34% performance enhancement (at least) compared with the recent active damping controller.

scholarly journals Digital Potentiometers and Digital-to-Analog Converters in Tasks for Tuning Of Active RC-Filters

2021 ◽  
Author(s):  
Nikolay Butyrlagin ◽  
Alexey Titov ◽  
Dmitriy Kleimenkin ◽  
Ilja Pakhomov
Keyword(s):  
Internal Structure ◽  
Voltage Regulator ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Digital To Analog Converters ◽  
Switching Circuits ◽  
Low Pass ◽  
Band Pass ◽  
Digital To Analog

The most popular schemes of digital potentiometers (DP) and digital-to-analog converters (DAC) are considered. DP and DAC use how elements of parameter adjustment of active RC-filters. The circuits of the DAC on the Kelvin-Varley divider, the Kelvin divider based on the R-2R matrix, and the architecture of the DAC with a segmented circuit are shown. The internal structure of DP an Analog Devices and Intersil company is shown, and also the DP switching circuits in a tunable low-pass filter and a band-pass filter, a programmable inverting amplifier and a voltage regulator are presented.

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