Topic
Voltage regulator
About: Voltage regulator is a research topic. Over the lifetime, 33536 publications have been published within this topic receiving 350859 citations.
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TL;DR: In this paper, an experimental switching regulator is designed and used to confirm the theoretical considerations of solar cell capacitance measurement that is relevant to the design of a switching voltage regulator and its effect in limiting the maximum design switching frequency is studied.
Abstract: Due to high power demand photovoltaic regulators are being switched at high frequency. The solar cell capacitance increases the ripple voltage of the switching regulators at higher switching frequencies. Increased ripple due to array capacitance is calculated and its effect in limiting the maximum design switching frequency is studied. An experimental switching regulator is designed and used to confirm the theoretical considerations. This study has identified a method of solar cell capacitance measurement that is relevant to the design of a switching voltage regulator.
67 citations
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TL;DR: A novel distributed control for uninterruptible power supply (UPS) modules in parallel operation is proposed in this paper, in which the voltage reference synchronization control and load current distribution control are decoupled by a local feedback.
Abstract: A novel distributed control for uninterruptible power supply (UPS) modules in parallel operation is proposed in this paper, in which the voltage reference synchronization control and load current distribution control are decoupled by a local feedback. The voltage reference is presynchronized beyond the current distribution control with a microcontroller unit and a wired-and circuit. Both instantaneous current distribution and hot swapping of any module are allowed with all the UPS modules electrically isolated. The transfer function of the circulating current regulator is analyzed and equivalent to a first-order low-pass filter. The control characteristics of the root-mean-square voltage regulator (RMSVR) in each UPS module in parallel operation are researched, as well as the coupling effect between the RMSVR and the load balance performance. The RMSVR's impact on current distribution is compensated by introducing the amplitude of the output current or the circulating current into the amplitude adjustment of the sinusoidal voltage reference signal. As a result, both the current sharing and the output-voltage performance of the whole system are effectively improved. Theoretical analysis and experimental results are provided to demonstrate the validity and feasibility of the proposed control.
67 citations
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11 Aug 2005TL;DR: In this article, a switch current regulator coupled to a current control signal input, a switch voltage regulator coupled with the LED, and a sensor coupled to the current regulator, the LED and a signal feedback circuit, is used to measure status information regarding the switch regulator and the LED.
Abstract: System and method for improving efficiency in driving LEDs. A preferred embodiment comprises a switch current regulator coupled to a current control signal input, the switch current regulator to control an amount of current provided to the LED based upon a magnitude of a voltage on the current control signal input, a switching voltage regulator coupled to the switch current regulator and the LED, the switching voltage regulator to provide current to the LED, and a sensor coupled to the switch current regulator, the LED, and a signal feedback circuit, the sensor to measure status information regarding the switch current regulator and the LED and provides the information to a controller, wherein the status information can be used to adjust the current on the current control signal input.
67 citations
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06 Oct 1996
TL;DR: A modified control scheme for an advanced series compensator based on a single voltage source inverter is described, demonstrating the ability of the compensator to provide a rapidly controllable magnitude of compensation.
Abstract: Power utilities have traditionally used series capacitors to increase the power transfer capability of transmission lines, but their widespread use has been limited by concerns for the harmful effects of series resonances. An advanced, controllable series VAr compensator has the potential to avoid such problems and, therefore, allow more efficient use of existing transmission plant. This paper describes a modified control scheme for an advanced series VAr compensator based on a single voltage source inverter. Practical results from a working prototype demonstrate the ability of the compensator to provide a rapidly controllable magnitude of compensation.
67 citations
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TL;DR: A fully integrated digitally controlled two-phase buck voltage regulator with on-die solenoid inductors with a planar magnetic core is demonstrated in 14-nm tri-gate CMOS for fine-grained power delivery/management domains of high power density in system-on-chips while enabling ultra-thin (z-height) packages.
Abstract: A fully integrated digitally controlled two-phase buck voltage regulator (VR) with on-die solenoid inductors with a planar magnetic core is demonstrated in 14-nm tri-gate CMOS for fine-grained power delivery/management domains of high power density in system-on-chips while enabling ultra-thin (z-height) packages. The VR achieves 1-A/mm2 power density for 400-mA load current with a measured peak efficiency of 84% at 100-MHz switching frequency including a digital PWM with >9 bits (8 ps) of resolution.
67 citations