Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 31 for “"Current Mode Control"”.
-
Digital current mode control for multiple input converters
… this thesis, the possibility of applying digital current mode control on multiple-input (MI) converters is studied. As for MI topologies having a central energy transfer inductor, the predictive constant on-time current-mode control can greatly reduce both the design and digital realization …
-
Current-Mode Control: Modeling and its Digital Application
Due to unique characteristics, current-mode control architectures with different implementation approaches have been widely used in power converter design to achieve current sharing, AVP control, and light-load efficiency improvement. Therefore, an accurate model for current-mode control is …
-
A new small-signal model for current-mode control
A new small-signal model is developed for pulse-width-modulated converters operating with current-mode control. Four different control schemes are analyzed, all of which use the instantaneous value of the inductor current as part of the control modulation. Continuous-conduction mode and …
-
Current-mode control of a magnetic amplifier post regulator
An analysis is presented on current-mode control of a magnetic amplifier post regulator. Small-signal models for a magnetic amplifier reset method are developed for post regulators operating in continuous conduction mode. A design procedure is given and experimental verification of the model is …
-
Average current-mode control and charge control for PWM converters
Two control schemes for PWM converters, average current-mode (ACM) control and charge control, are studied in this dissertation. The small-signal models are derived for continuous-conduction mode PWM converters employing these two controls. Sampled-data modeling is applied to the current loop …
-
Advanced current-mode control techniques for DC-DC power electronic converters
… the stringent regulation requirements, control of these converters is a challenging task. Several analog and digital approaches have already been reported in the literature. This work presents new control techniques to improve the dynamic performance of dc-dc converters"--Abstract, page …
-
Modeling of V2 Control with Composite Capacitors and Average Current Mode Control
Various types of current mode control are being used in different applications. Model for current mode control is indispensable for proper system design. Since 1980s, modeling of current mode control has been a hot topic in power electronics field. In current mode control, sub-harmonic oscillation …
-
Generalized Average-Current-Mode Control of Single-Phase AC-DC Boost Converters with Power Factor Correction
The dissertation presents a generalized average-current-mode control technique (GACMC), which is an extension of the average-current-mode control (ACMC) for single-phase ac-dc boost converters with power factor correction (PFC). Traditional ACMC is generalized in a sense that it offers improved …
-
Design and Development of High-Frequency Switching Amplifiers Used for Smart Material Actuators With Current Mode Control
… is hysteretic with respect to its electrical control signal. This actuator's reactive load property usually causes a large portion of reactive power circulating between the power amplifier and the driven actuator, thus reduces the circuit efficiency in a linear power amplifier scenario. In …
-
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 …
-
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 …
-
Analysis and design of multiple-output forward converter with weighted voltage control
This work presents the modeling and analyses of multiple-output forward converters with weighted voltage control. Based upon the analyses, the systematic design methodologies and design tools are provided. A power stage de model including all the major parasitics, which are detrimental to the …
-
Small-signal analysis of parallel power converters
A small-signal analysis and modelling approach is developed for parallel power converter modules. The small-signal model of parallel buck converter modules is developed in detail to demonstrate the modelling approach. It is shown that a multiple power converter module system can be reduced to an …
-
Advanced Control Schemes for High-Bandwidth Multiphase Voltage Regulators
… as energy-storage devices, increasing the control bandwidth (BW) of the multiphase voltage regulator (VR) is a more cost-effective and space-saving approach. However, it is found that the stability margin of current-mode control in high-BW design is very sensitive to operating conditions …
-
High performance control of VRM circuits
… because of its ability to handle large load current and to achieve fast dynamic transient response under large step-load condition.The first part of this thesis fully investigates this issue for three popular control schemes used currently: Voltage Mode Control (VMC), Average Current Mode …
-
Small signal analysis of nonlinear systems with periodic operating trajectories
… that can take on one of two values, based upon a controlling variable. Another requirement is that the system be periodic. The method is shown by examples to be very accurate, even at high frequencies. It predicts the subharmonic oscillation that can occur in converters with constant-frequency …
-
Modeling and design of digital current-mode constant on-time control
… presents the fundamental issues of the digital controlled DC/DC converter. A lot of challenges exist when you introduce the digital control technique into the control of the DC/DC converter, especially with regards to the voltage regulator module. One issue is the limit cycle oscillation problem …
-
Design of a battery charger for the NASA EOS space platform
… of the battery charger power stage and its current and voltage control loops. The charger was designed to minimize the mass and to maximize the efficiency. In addition to restoring energy to the batteries, this charger regulates the spacecraft bus voltage during the transition between …
-
Control And Topology Improvements In Half-bridge Dc-dc Converters
… requirements for DC-DC converters. Topology and control are two key topics in this dissertation. A variety of techniques for DC-DC converter performance improvement are presented in this work. Focusing on the efficiency issue, a variety of clamping techniques including both active and passive …
-
Nonlinear control and operation of DC to DC switching power converters
Conventional control of switching power conversion is based on a linear model of the system, which limits its scope and performance. This thesis addresses a family of control and operation issues that arise from the nonlinear nature of the switching power conversion. The focus is on dc to dc power …
Page 1 of 2