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S Y R Hui - One of the best experts on this subject based on the ideXlab platform.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: Henry Shuhung Chung, K K Tse, M T Ho, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracking technique for pv panels
    Power Electronics Specialists Conference, 2001
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk DC/DC converter operating in discontinuous inductor-current or capacitor-voltage mode. The method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under different insolation levels and a large insolation level change will be studied.

K K Tse - One of the best experts on this subject based on the ideXlab platform.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: Henry Shuhung Chung, K K Tse, M T Ho, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracking technique for pv panels
    Power Electronics Specialists Conference, 2001
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk DC/DC converter operating in discontinuous inductor-current or capacitor-voltage mode. The method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under different insolation levels and a large insolation level change will be studied.

Henry Shuhung Chung - One of the best experts on this subject based on the ideXlab platform.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: Henry Shuhung Chung, K K Tse, M T Ho, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

  • a novel maximum power point tracking technique for pv panels
    Power Electronics Specialists Conference, 2001
    Co-Authors: K K Tse, Henry Shuhung Chung, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk DC/DC converter operating in discontinuous inductor-current or capacitor-voltage mode. The method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under different insolation levels and a large insolation level change will be studied.

M T Ho - One of the best experts on this subject based on the ideXlab platform.

  • a novel maximum power point tracker for pv panels using switching frequency modulation
    IEEE Transactions on Power Electronics, 2002
    Co-Authors: Henry Shuhung Chung, K K Tse, M T Ho, S Y R Hui
    Abstract:

    A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor-current or capacitor-voltage mode. A method of locating the maximum power point (MPP) is based on injecting a small-signal sinusoidal perturbation into the switching frequency and comparing the AC component and the average value of the panel terminal voltage. Apart from not requiring any sophisticated Digital Computation of the panel power, the proposed technique does not approximate the panel characteristics and can globally locate the MPP under wide insolation conditions. The tracking capability has been verified experimentally with a 10 W solar panel under a controlled experimental setup. Performances under the steady state and in the large-signal change of the insolation level will are given.

P Hasler - One of the best experts on this subject based on the ideXlab platform.

  • compressive sensing on a cmos separable transform image sensor
    Proceedings of the IEEE, 2010
    Co-Authors: Ryan Robucci, J Gray, Leung Kin Chiu, Justin Romberg, P Hasler
    Abstract:

    This paper demonstrates a Computational image sensor capable of implementing compressive sensing operations. Instead of sensing raw pixel data, this image sensor projects the image onto a separable 2-D basis set and measures the corresponding expansion coefficients. The inner products are computed in the analog domain using a Computational focal plane and an analog vector-matrix multiplier (VMM). This is more than mere postprocessing, as the processing circuity is integrated as part of the sensing circuity itself. We implement compressive imaging on the sensor by using pseudorandom vectors called noiselets for the measurement basis. This choice allows us to reconstruct the image from only a small percentage of the transform coefficients. This effectively compresses the image without any Digital Computation and reduces the throughput of the analog-to-Digital converter (ADC). The reduction in throughput has the potential to reduce power consumption and increase the frame rate. The general architecture and a detailed circuit implementation of the image sensor are discussed. We also present experimental results that demonstrate the advantages of using the sensor for compressive imaging rather than more traditional coded imaging strategies.

  • compressive sensing on a cmos separable transform image sensor by compressing images before they are converted to Digital format this image sensor device can use analog Computation to achieve much higher resolution at lower cost
    Proceedings of the IEEE, 2010
    Co-Authors: Ryan Robucci, J Gray, Leung Kin Chiu, Justin Romberg, P Hasler
    Abstract:

    This paper demonstrates a Computational image sensor capable of implementing compressive sensing opera- tions. Instead of sensing raw pixel data, this image sensor pro- jects the image onto a separable 2-D basis set and measures the corresponding expansion coefficients. The inner products are computed in the analog domain using a Computational focal plane and an analog vector-matrix multiplier (VMM). This is more than mere postprocessing, as the processing circuity is integrated as part of the sensing circuity itself. We implement compressive imaging on the sensor by using pseudorandom vectors called noiselets for the measurement basis. This choice allows us to reconstruct the image from only a small percentage of the transform coefficients. This effectively compresses the image without any Digital Computation and reduces the throughput of the analog-to-Digital converter (ADC). The re- duction in throughput has the potential to reduce power con- sumption and increase the frame rate. The general architecture and a detailed circuit implementation of the image sensor are discussed. We also present experimental results that demon- strate the advantages of using the sensor for compressive imaging rather than more traditional coded imaging strategies.