The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform

D. M. G. Preethichandra - One of the best experts on this subject based on the ideXlab platform.

  • A Novel PLC Impedance Conditioning Technique for Quasi-Common Mode Power-Line Antenna Injection
    2018 IEEE 27th International Symposium on Industrial Electronics (ISIE), 2018
    Co-Authors: P. Janse A. Van Rensburg, U. Izhar, D. M. G. Preethichandra
    Abstract:

    In recent years, there has been a growing interest in the utilisation of in-situ power cabling for its antenna properties. Common-mode injection of signals further holds promise to facilitate effective low-power radiation from powerline antennas (PLAs) throughout a building. However, common-mode power-line communication (PLC) injection is illegal in many countries, for fears of interfering with the Residual Current Device (RCD) protection. This paper reports on a novel impedance conditioning technique which makes use of a mains-rated `Y-cap' and resistor to balance impedance levels in the Live and Earth conductors for improved PLC injection. The technique further improves power-line radiation by facilitating the flow of PLC Current through the earth wire - in line with regulations. In general, earth return paths are asymmetrical to the other conductors and improved radiation is thus obtained when Currents return through earth. Simulation results as well as experimental results are presented which confirm improved PLC injection as well as quasi-common mode earth Current.

  • ISIE - A Novel PLC Impedance Conditioning Technique for Quasi-Common Mode Power-Line Antenna Injection
    2018 IEEE 27th International Symposium on Industrial Electronics (ISIE), 2018
    Co-Authors: P. A. Janse Van Rensburg, U. Izhar, D. M. G. Preethichandra
    Abstract:

    In recent years, there has been a growing interest in the utilisation of in-situ power cabling for its antenna properties. Common-mode injection of signals further holds promise to facilitate effective low-power radiation from powerline antennas (PLAs) throughout a building. However, common-mode power-line communication (PLC) injection is illegal in many countries, for fears of interfering with the Residual Current Device (RCD) protection. This paper reports on a novel impedance conditioning technique which makes use of a mains-rated ‘Y-cap’ and resistor to balance impedance levels in the Live and Earth conductors for improved PLC injection. The technique further improves power-line radiation by facilitating the flow of PLC Current through the earth wire - in line with regulations. In general, earth return paths are asymmetrical to the other conductors and improved radiation is thus obtained when Currents return through earth. Simulation results as well as experimental results are presented which confirm improved PLC injection as well as quasi-common mode earth Current.

Michael Anheuser - One of the best experts on this subject based on the ideXlab platform.

  • A novel design of small size DCT with a double tuned sampling circuit
    2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2015
    Co-Authors: Weigang Chen, Feng Du, Yue Zhuo, Michael Anheuser
    Abstract:

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

  • I2MTC - A novel design of small size DCT with a double tuned sampling circuit
    2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2015
    Co-Authors: Liu Zhen, Weigang Chen, Feng Du, Yue Zhuo, Michael Anheuser
    Abstract:

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

  • AMPS - An AC/DC sensing method based on adaptive magnetic modulation technology with double feedback properties
    2011 IEEE International Workshop on Applied Measurements for Power Systems (AMPS), 2011
    Co-Authors: Min Yingzong, Du Feng, Chen Weigang, Michael Anheuser
    Abstract:

    In this paper, An AC/DC (alternating Current, direct Current) Current sensing method is proposed to detect the Current from DC to several kilohertz (kHz) with wide sensing range and low power consumption. A novel adaptive magnetic modulation technology with double feedback properties is applied to modulate the Current. And a simplified demodulation method, involving an 8th order low pass Butterworth filter is designed to measure the Current. One typical application of this method is the detection of Residual Current for type B RCD (Residual Current Device) complying with IEC60947-2, in which the Residual Current of sinusoidal AC, pulsating DC and smooth DC should be detected to protect person and machine. The type B RCD with the Current sensing method characterizes wide Current sensing range, low power consumption and high Current measurement accuracy.

  • An AC/DC sensing method based on adaptive magnetic modulation technology with double feedback properties
    2011 IEEE International Workshop on Applied Measurements for Power Systems (AMPS), 2011
    Co-Authors: Min Yingzong, Du Feng, Chen Weigang, Michael Anheuser
    Abstract:

    In this paper, An AC/DC (alternating Current, direct Current) Current sensing method is proposed to detect the Current from DC to several kilohertz (kHz) with wide sensing range and low power consumption. A novel adaptive magnetic modulation technology with double feedback properties is applied to modulate the Current. And a simplified demodulation method, involving an 8th order low pass Butterworth filter is designed to measure the Current. One typical application of this method is the detection of Residual Current for type B RCD (Residual Current Device) complying with IEC60947-2, in which the Residual Current of sinusoidal AC, pulsating DC and smooth DC should be detected to protect person and machine. The type B RCD with the Current sensing method characterizes wide Current sensing range, low power consumption and high Current measurement accuracy.

Yuejia Wu - One of the best experts on this subject based on the ideXlab platform.

  • IECON - Preventing electrical hazards under grounding-fault condition by means of surface leakage protection
    IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, 2015
    Co-Authors: Wei Wu, Yuejia Wu
    Abstract:

    Appliance grounding, cooperating with over-Current protection Device, can prevent the appliance user from electric shock. But in the real world the appliance sometimes is not well-grounded. This paper proposes an innovative technology of "surface leakage protection" (SLP) which can be a good substitute of appliance grounding for electrical safety purpose. A SLP Device detects electrical leakage at the surface of an appliance and removes the power supply immediately from appliance in case the leakage occurs, no appliance grounding is required. The principle of SLP is discussed, and the schematic diagram of the SLP is given with embodiment. The neutral line identification of SLP is also discussed to ensure a reliable SLP performance. The study and application embodiment indicate the SLP can effectively protect appliance user from electric shock in case of grounding-fault, and the building cost of a SLP Device is similar to a Residual Current Device (RCD), easy to be widely employed.

  • Preventing electrical hazards under grounding-fault condition by means of surface leakage protection
    IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, 2015
    Co-Authors: Wei Wu, Yuejia Wu
    Abstract:

    Appliance grounding, cooperating with over-Current protection Device, can prevent the appliance user from electric shock. But in the real world the appliance sometimes is not well-grounded. This paper proposes an innovative technology of "surface leakage protection" (SLP) which can be a good substitute of appliance grounding for electrical safety purpose. A SLP Device detects electrical leakage at the surface of an appliance and removes the power supply immediately from appliance in case the leakage occurs, no appliance grounding is required. The principle of SLP is discussed, and the schematic diagram of the SLP is given with embodiment. The neutral line identification of SLP is also discussed to ensure a reliable SLP performance. The study and application embodiment indicate the SLP can effectively protect appliance user from electric shock in case of grounding-fault, and the building cost of a SLP Device is similar to a Residual Current Device (RCD), easy to be widely employed.

  • Surface Leakage Protection - Next generation of electrocution protection technology
    2014 IEEE IAS Electrical Safety Workshop, 2014
    Co-Authors: Wei Wu, Yuejia Wu
    Abstract:

    In past decades, many efforts have been given to improving the Residual Current Device (RCD) that has been the major and only means for electrocution protection since 1955. However, all of those efforts are based on the principle of RCDs, which are no longer in accordance with modern appliance usage, and in many cases RCDs may cause nuisance trips or fail to work. This paper proposes an innovative technology, Surface Leakage Protection (SLP), which focus on electrocution protection before electrical accidents happen, and immediately remove the power supply to an appliance when a leakage happens on the surface of the appliance, before a person can be electrocuted. The paper further gives a detailed description of SLP by introducing an SLP embodiment that monitors the surface of an appliance through the grounding wire of a three-wire plug, and can cut off the power supply to the appliance instantly once the electricity leakage occurs, no matter whether the leakage comes due to poor insulation of the appliance or is caused by faulty grounding or by erroneous wiring with power supply. No appliance grounding is required when using an SLP. That means that families which have no grounding wire available can also prevent electrocution by employing an SLP Device with their appliances.

U. Izhar - One of the best experts on this subject based on the ideXlab platform.

  • A Novel PLC Impedance Conditioning Technique for Quasi-Common Mode Power-Line Antenna Injection
    2018 IEEE 27th International Symposium on Industrial Electronics (ISIE), 2018
    Co-Authors: P. Janse A. Van Rensburg, U. Izhar, D. M. G. Preethichandra
    Abstract:

    In recent years, there has been a growing interest in the utilisation of in-situ power cabling for its antenna properties. Common-mode injection of signals further holds promise to facilitate effective low-power radiation from powerline antennas (PLAs) throughout a building. However, common-mode power-line communication (PLC) injection is illegal in many countries, for fears of interfering with the Residual Current Device (RCD) protection. This paper reports on a novel impedance conditioning technique which makes use of a mains-rated `Y-cap' and resistor to balance impedance levels in the Live and Earth conductors for improved PLC injection. The technique further improves power-line radiation by facilitating the flow of PLC Current through the earth wire - in line with regulations. In general, earth return paths are asymmetrical to the other conductors and improved radiation is thus obtained when Currents return through earth. Simulation results as well as experimental results are presented which confirm improved PLC injection as well as quasi-common mode earth Current.

  • ISIE - A Novel PLC Impedance Conditioning Technique for Quasi-Common Mode Power-Line Antenna Injection
    2018 IEEE 27th International Symposium on Industrial Electronics (ISIE), 2018
    Co-Authors: P. A. Janse Van Rensburg, U. Izhar, D. M. G. Preethichandra
    Abstract:

    In recent years, there has been a growing interest in the utilisation of in-situ power cabling for its antenna properties. Common-mode injection of signals further holds promise to facilitate effective low-power radiation from powerline antennas (PLAs) throughout a building. However, common-mode power-line communication (PLC) injection is illegal in many countries, for fears of interfering with the Residual Current Device (RCD) protection. This paper reports on a novel impedance conditioning technique which makes use of a mains-rated ‘Y-cap’ and resistor to balance impedance levels in the Live and Earth conductors for improved PLC injection. The technique further improves power-line radiation by facilitating the flow of PLC Current through the earth wire - in line with regulations. In general, earth return paths are asymmetrical to the other conductors and improved radiation is thus obtained when Currents return through earth. Simulation results as well as experimental results are presented which confirm improved PLC injection as well as quasi-common mode earth Current.

Leting He - One of the best experts on this subject based on the ideXlab platform.

  • Researches on grounding types of low-voltage DC bipolar distribution systems
    Zhongguo Dianji Gongcheng Xuebao Proceedings of the Chinese Society of Electrical Engineering, 2014
    Co-Authors: Lulu Li, Liqiang Zeng, Jing Yong, Leting He
    Abstract:

    For the civil low voltage DC distribution systems, selecting a suitable grounding type and improving electrical security is of significance. Using the DC bipolar distribution system based on DC micro-girds and voltage balancer as the research subject, this paper presented the grounding fault parameters and validated them with the aid of Matlab/Simulink software. On this basis, this paper discussed the power supply continuity, protection property against electric shock and protection requirement for each grounding type. It indicates that, compared with the traditional AC 220 V distribution system, the low voltage DC distribution system has a significant advantage in terms of electrical security. In addition, the power supply continuity and the electrical security of the DC TT system equipped with Residual Current Device (RCD) can be improved as well, which is more suitable for this bipolar distribution system with voltage balancer than IT or TN system. Finally, the allowed range values of the grounding resistors and technical requirements are given to ensure the electrical security. © 2014 Chinese Society for Electrical Engineering.