Galvanic isolation is becoming increasingly important in a wide field of applications to guarantee human safety or better reliability harsh industrial environments. The transfer both data and power across an barrier often essential requisite these applications. While transmission with galvanic has been achieved through traditional optocouplers, capacitive coupling, integrated transformers, transferring the presents several challenges regarding size performance. Some state-of-the-art devices...

This article presents a fully integrated isolated power transfer system using an on-chip transformer with magnetic core. The core achieves quality factor of >12 at 20 MHz. is switched resonantly MHz full-bridge LLC circuits to realize efficient while eliminating the excess radiated emissions symmetric topology. A multi-mode approach combining pulse width modulation (PWM) control and frequency enables >1 W output optimal efficiency. 5-kV galvanic isolation achieved through thick polyimide...

this work presents an isolated DC-DC converter with fully integrated magnetic core transformer. The achieves best-in-class efficiency and EMI performance which are most concerned for on chip proposed chip-level contains transformer 4 m thick stacked layers CoZrTa core, a symmetric pre-driver, full-bridge driver, modified LLC resonance network, full-wave bridge rectifier on-chip Schottky diode type II compensation network. Fully architecture accurate timing control utilized to minimize the...

In this paper, a type of Type B RCD applying simplified magnetic modulation/demodulation method is designed to detect residual currents sinusoidal AC, pulsating DC and smooth protect person against indirect/direct contact fire hazards. A modulation based on RL self-oscillation circuit applied modulate AC current with square-wave pulse signal. demodulation method, involving 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> -order LPF...

In this paper, An AC/DC (alternating current, direct current) current sensing method is proposed to detect the from DC several kilohertz (kHz) with wide range and low power consumption. A novel adaptive magnetic modulation technology double feedback properties applied modulate current. And a simplified demodulation method, involving an 8 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order pass Butterworth filter designed measure One...

In this paper, a new type of hall current sensor is presented. Based on the analysis working principle without iron core, novel design method by adjusting sensitivity, mounting distance and magnetic sensitive direction different chips proposed to reduce adjacent interference sensitivity position variation conductor carrying primary current. Considering possible conditions in practical application, one embodiment designed, further its performance validated comparison conventional sensor.

Two-phase flow measurement is a challenging task for ultrasonic flowmeters. This paper introduces more stable and robust flowmeter technology, which can better cope with liquid enriched gas bubbles. The uses broadband transducers multi-frequency digital signal processing to enhance the noise ratio under bubble interference. same thus measure both dirty clean flows, widening its application area. An experimental system set up test new technology benchmark flowmeter.

As more and distributed generations existing in the grid, directional overcurrent protection is required modern distribution network. The traditional method needs voltage phasor as reference that adds cost. current-only can solve this problem to a certain extent. But, it can't recognize fault direction when of power flow not fixed normal situation. This paper proposes novel utilizes information current flowing cable shield overcome drawbacks previous protection.

In this paper, a new type of air core current transformer (Rogowski coil) for easily industrialized application is introduced. Based on the analysis working principle with separate coils, design method called error balance (EBM) proposed by considering adjacent interference and sensitivity to position variation conductor carrying primary current. The improved performance validated both simulation test results.

Recent developments of variable frequency applications have accelerated the demand to look at measurement technology on signals. Most low voltage (LV) circuit breakers are designed operate a fixed frequency. Therefore, it is necessary propose variable-frequency measuring concept for LV protection devices. In this paper, we novel combined alternate current sensor based Rogowski coil and iron-cored transformer (CT), which can provide high accuracy within range 0.2Hz-200Hz amplitude (up several...

New structure of Rogowski coil and the corresponding optimization method are proposed. In existing research results, sensor performance has been improved by considering influence factors from application scenario like adjacent interference sensor's position. However, there exists physical discontinuity between coils due to natural non-overlapping. With novel design, it allows overlapping parameters simultaneously, which can together eliminate negative influence. By fully using both main...

DCT (Differential Current Transformer) is an important part of RCD (Residual Device), which used to detect the existence residual current in power line. To guarantee adequate sensitivity and linearity at a low current, certain volume required results large size RCD. However, smaller more compact structure by market. The becomes obstacle for small development. We propose novel design with double tunable sampling circuit that can meet performance linearity. A similar value comparable DCTs be...

In recent years, harmonic pollution is a growing concern with large volume of nonlinear devices applied in power systems. Those cause voltage and current distortion throughout the system, which can result reduction efficiency generation, transmission utilization electric energy; as well dysfunctions system components by interfering relay protections communications. Power utilities strive to ensure that planning levels are maintained limiting currents injected loads. A monitoring device able...

The Intelligent Electric Devices and corresponding data management system play very important roles in the Smart Grid with higher requirements on intelligence. In this article a new smart power monitoring device intelligence is introduced. Via Peer-to-Peer communication, can be automatically discovered by others obtain target large batch rapidly. Based it, an innovative firmware update method proposed.

An automation system for bioprocess monitoring and control, based on the distributed control SIMATIC PCS7 new online sensors, is introduced. The realizes on-line of O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> CO concentrations in exhaust gas, cell density size during fermentation processes by instruments. Different phases can be clearly identified using newly developed sensor, which ideal implementation advanced process strategies....

In the power system with multiple sources, fault current direction is not fixed. Therefore, conventional ZSI protection suitable. Furthermore, judgment function required. this paper, R, L property based method proposed. This verified on simulation and test result. The validation shows can correctly judge within shorter time than state of art method.

This paper proposes a galvanic isolated full-bridge rectifier that utilizes an adaptive zero current detection (ZCD) method to eliminate the diode drop and reverse current. The is designed simulated using 0.18µD BCD process with active area of 0.64 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . simulation results demonstrate can significantly reduce improve transmission efficiency. With load 75mA, circuit achieves efficiency 92%....