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Showing 1 to 20 of 20 for “"current feedback"”.
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Novel approaches in current-feedback operational amplifier design
… and develop a novel bipolar junction transistor Current Feedback Operational Amplifier (CFOA) with a good Common-Mode Rejection Ratio (CMRR), suitable for radio frequency (RF) applications. This research focused on investigation of the established CFOA with the emphases of improving CMRR, …
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Modeling and Control Design of a Bidirectional PWM Converter for Single-phase Energy Systems
… in renewable energy systems. There is a generic current loop for different modes of operation to ease the transition between different modes, including stand-alone inverter mode, grid-tied inverter mode, grid-tied rectifier mode and grid-tied charger/discharger mode. Under stand-alone mode …
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Control Design of a Single-Phase DC/AC Inverter for PV Applications
… frame outer control loop with the capacitor current feedback inner control loop, the system can achieve both zero steady-state error and better step load performance. For grid-tied inverter control, proportional capacitor current feedback is used. This achieves the active damping needed to …
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Voltage-source inverter output waveform compensation using adaptive intelligent control
… the form of UPS load voltage commands and load current feedback are propagated forward in the network each controller sampling period generating the inverter output voltage commands, the network outputs, which are converted to three phase inverter switching Signals using the space vector PWM …
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Task based performance feedback and subsequent worker performance
Recent task based performance feedback research has concentrated on investigation of the effects of feedback message characteristics to explain variance in individual's post feedback predicted performances. Results of this research have not been well integrated within existing performance feedback …
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Improvement of Stability of a Grid-Connected Inverter with an LCL filter by Robust Strong Active Damping and Model Predictive Control
… (LCL) filter. A challenge of current control for the VSI is LCL filter resonance near to the control stability boundary, which interacts with the inverter control switching actions and creates the possibility of instability. In general, active damping is needed to stabilize the …
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Návrh analogových obvodů s nízkým napájecím napětím a nízkým příkonem
… amplifier), CCII (second generation current conveyor), FB-CCII (fully-differential second generation current conveyor), FB-DDA (fully-balanced differential difference amplifier), VDTA (voltage differencing transconductance amplifier), CC-CDBA (current-controlled current differencing …
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The electrical characteristics of the direct current welding arc and the design and testing of a D.C. welding generator
… of the alternator is varied by means of current feedback from the output circuit which is able to produce high welding currents when using a low voltage reference supply from a battery. The initial evaluation has to be repeated on a new design of alternator and tests indicate that a …
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Development of power factor correction using boost converter circuit
… on developed of a system that can control current by using Texas Instruments microcontroller with Code Compressor Studio software. The type of controller used is C2000 Microcontroller (Texas Instrument TMS320F28) for current feedback loop application. The connection between PC as the …
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Customer feedback systems in tourism : a study of interdependent services of German travel agencies, tour operations and airlines
… reflect poor on all providers. Customer feedback systems have the potential to help management identify customers' expectations and causes of (dis)satisfaction in order to then communicate necessary service improvements back to the employees. Little knowledge exists how feedback systems …
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The Design Of A Nanolithographic Process
… were undertaken. A custom 3-axis AFM with feedback control on three positioning axes of nanometer precision was designed in order to execute nanolithographic research. This AFM system integrates a computer aided design/computer aided manufacturing (CAD/CAM) environment to allow for the …
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Characterization of epitaxial semiconductor films by scanning tunneling microscopy at ambient pressure
… mechanism associated with the carrier type. Current-voltage (IV) characteristics of the STM tunnel junction are obtained at selected locations in the epitaxial layers. IV curves acquired over n- and p-type regions resemble the IV characteristics of Schottky barrier diodes. A new imaging …
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Pedagogical feedback in the motor skill domain for computer-based sports training
… of Computer-based Sport Training (CBST), feedback plays an important role in both coaching and learning. A good CBST system includes not only good training strategies but also effective feedback design. Feedback in the motor skill domain via CBST may be synthetically designed to allow …
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CMOS/Bipolar current conveyor design and development
… programme was to design and develop a novel CMOS current conveyor, to improve areas such as bandwidth, slew rate, gain, and Powe- Supply Reject Ratio (PSRR). The current conveyor can be used in low frequency applications such as LED drivers for mobile phones and televisions, and high frequency …
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Dynamic Performance Analyses of Current Sharing Control for DC/DC Converters
… power systems. To ensure balanced output currents among paralleled power modules, current sharing control is usually necessary.Active current sharing controls with current feedback mechanism are widely used in today's power supplies. However, the dynamic performance of these current …
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Unified Three-terminal Switch Model for Current Mode Controls
Current-mode control architectures with different implementation approaches have been an indispensable technique in many applications, such as voltage regulator, power factor correction, battery charger and LED driver. Since the inductor current ramp, one of state variables influenced by the input …
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Multi-Branch Current Sensing Based Single Current Sensor Technique for Power Electronic Converters
A new concept of current sensor reduction technique called multi-branch current sensing technique (MCST) is proposed in this dissertation. In the proposed current sensing method, one more branch currents are simultaneously measured several times in a single switching cycle by using a single current …
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POWER CONDITIONING UNIT FOR SMALL SCALE HYBRID PV-WIND GENERATION SYSTEM
… for the wind generator is based on the current and voltage measured on the dc side of the rectifier connected to the permanent magnet synchronous generator (PMSG). Maximum power point tracking (MPPT) control is provided in normal operation under the rated speed using a dc/dc boost …
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Modeling and Stability Analysis for Multiphase Constant On-Time Control With Phase Overlapping
… tolerance window and handle a large steady-state current. For output voltage regulation, multiphase current-mode and V² constant on-time (COT) control techniques are widely used because these control methods can help increase control bandwidth, minimize output impedance, and achieve fast transient …
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Equivalent Circuit Model for Current Mode Controls and Its Extensions
Current-mode control architectures have been an indispensable technique in many applications, such as Voltage Regulator, Point-of-load converters, power factor correction, battery charger and LED driver. Since the inductor current ramp is used in the modulator in current-mode control without any …