The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform

Yang Hong - One of the best experts on this subject based on the ideXlab platform.

  • a design of load box calibration device by Maxwell Bridge
    Electrical Measurement & Instrumentation, 2011
    Co-Authors: Yang Hong
    Abstract:

    In routine testing of load-box,the error often appears instability which related to the principle of detection.At present,the measuring principle of load-box is "Impedance detection" or "Admittance test" which is greatly affected by the quality of power grid(such as upper harmonics,frequency and other factors).As this point,the error of load-box often appears in unstable phenomenon especially in low impedance.Therefore,this paper designs a device to calibration load-box that based on the theory of Maxwell Bridge,and provides a method by detecting the components(such as resistance and inductance) in the load-box which can not only avoid the effect that comes from the grid,but also can offer a basis for developing more accurate device of load-box calibration.Moreover,a comparative experiment has been made between this device and the tradition one,and it proved that the independent component measuring idea has obvious advantages at stability aspect.

Yongseok Lim - One of the best experts on this subject based on the ideXlab platform.

  • a novel metal foreign object detection for wireless high power transfer using a two layer balanced coil array with a serial resonance Maxwell Bridge
    Electronics, 2020
    Co-Authors: Sunhee Kim, Haeyong Jung, Yongseok Lim
    Abstract:

    In a wireless high-power transfer system with a distance of several tens of centimeters apart between the transmitter and receiver coils, one of the most challenging issues is to detect metallic foreign objects between the transmitter and receiver coils. The metallic foreign objects must be detected and removed since these reduce the transmission efficiency and cause heat generation of the transmitter and receiver. This paper presents two-layer symmetric balanced coil array so that if there are metallic foreign objects, it can be detected through the change of the inductance of the balanced coils. Since the balanced coil is composed of coils that are in a symmetrical relationship in position, there is no need for a reference coil, and interference between coils is reduced by dividing the coil into two layers. In addition, a novel serial-resonance Maxwell Bridge circuit to improve the inductance change detection performance is presented in this paper. The proposed metallic foreign object detection system is implemented using two-layer balanced coil array with a serial-resonance Maxwell Bridge and the experimental results show that voltage changes of hundreds of mV to several V occur when a metallic foreign object is inserted, so that even small metals such as clips can be detected.

Sunhee Kim - One of the best experts on this subject based on the ideXlab platform.

  • a novel metal foreign object detection for wireless high power transfer using a two layer balanced coil array with a serial resonance Maxwell Bridge
    Electronics, 2020
    Co-Authors: Sunhee Kim, Haeyong Jung, Yongseok Lim
    Abstract:

    In a wireless high-power transfer system with a distance of several tens of centimeters apart between the transmitter and receiver coils, one of the most challenging issues is to detect metallic foreign objects between the transmitter and receiver coils. The metallic foreign objects must be detected and removed since these reduce the transmission efficiency and cause heat generation of the transmitter and receiver. This paper presents two-layer symmetric balanced coil array so that if there are metallic foreign objects, it can be detected through the change of the inductance of the balanced coils. Since the balanced coil is composed of coils that are in a symmetrical relationship in position, there is no need for a reference coil, and interference between coils is reduced by dividing the coil into two layers. In addition, a novel serial-resonance Maxwell Bridge circuit to improve the inductance change detection performance is presented in this paper. The proposed metallic foreign object detection system is implemented using two-layer balanced coil array with a serial-resonance Maxwell Bridge and the experimental results show that voltage changes of hundreds of mV to several V occur when a metallic foreign object is inserted, so that even small metals such as clips can be detected.

Haeyong Jung - One of the best experts on this subject based on the ideXlab platform.

  • a novel metal foreign object detection for wireless high power transfer using a two layer balanced coil array with a serial resonance Maxwell Bridge
    Electronics, 2020
    Co-Authors: Sunhee Kim, Haeyong Jung, Yongseok Lim
    Abstract:

    In a wireless high-power transfer system with a distance of several tens of centimeters apart between the transmitter and receiver coils, one of the most challenging issues is to detect metallic foreign objects between the transmitter and receiver coils. The metallic foreign objects must be detected and removed since these reduce the transmission efficiency and cause heat generation of the transmitter and receiver. This paper presents two-layer symmetric balanced coil array so that if there are metallic foreign objects, it can be detected through the change of the inductance of the balanced coils. Since the balanced coil is composed of coils that are in a symmetrical relationship in position, there is no need for a reference coil, and interference between coils is reduced by dividing the coil into two layers. In addition, a novel serial-resonance Maxwell Bridge circuit to improve the inductance change detection performance is presented in this paper. The proposed metallic foreign object detection system is implemented using two-layer balanced coil array with a serial-resonance Maxwell Bridge and the experimental results show that voltage changes of hundreds of mV to several V occur when a metallic foreign object is inserted, so that even small metals such as clips can be detected.

Subhas Chandra Mukhopadhyay - One of the best experts on this subject based on the ideXlab platform.

  • development of a smart rotameter with intelligent temperature compensation
    International Conference on Sensing Technology, 2018
    Co-Authors: Anamika Lata, Nirupama Mandal, Joyanta Kumar Roy, Praveen Maurya, Subhas Chandra Mukhopadhyay
    Abstract:

    Rotameter is a particular kind of flow meter, based on variable area principle. In this paper, an intelligent inductive pickup type flow transducer using rotameter is developed with temperature compensation. The float of rotameter is attached with a ferromagnetic wire and with the movement of float the self-inductance of inductive pickup changes. The self-inductance is changed into a voltage with the modified Maxwell Bridge network. The density of the fluid flowing through the rotameter get changed with the change in temperature, and it disturbs the calibration of rotameter. In this paper, different ANN (Artifical neural network) algorithm scheme is used for compensating the temperature influence in the modified rotameter.