The Experts below are selected from a list of 210 Experts worldwide ranked by ideXlab platform
Kehorng Chen - One of the best experts on this subject based on the ideXlab platform.
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boundary conduction mode controlled power factor corrector with line Voltage recovery and total harmonic distortion improvement techniques
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Chunyen Chen, Jenchieh Tsai, Yiting Chen, Kehorng ChenAbstract:The proposed line Voltage recovery (LVR) and the total harmonic distortion improvement (THDI) technique improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range in boundary conduction mode controlled power factor corrector (PFC). The LVR detects the input line root-mean-square Voltage to generate the digital equivalent code to the THDI for optimizing the THD by tuning the on-time value at different line Voltages. In addition, the LVR and the THDI provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC controller can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate that the peak PF value is 0.998 and the minimum THD is 1.7% by the test circuit fabricated in a TSMC 800-V ultrahigh-Voltage process with the universal line Voltage range of 90-264 V.
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high pf and ultra low thd power factor correction controller by sinusoidal wave synthesis and optimized thd control
International Symposium on Circuits and Systems, 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
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ISCAS - High-PF and ultra-low-THD power factor correction controller by sinusoidal-wave synthesis and optimized THD control
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
Chengchen Yang - One of the best experts on this subject based on the ideXlab platform.
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high pf and ultra low thd power factor correction controller by sinusoidal wave synthesis and optimized thd control
International Symposium on Circuits and Systems, 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
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ISCAS - High-PF and ultra-low-THD power factor correction controller by sinusoidal-wave synthesis and optimized THD control
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
Junhui Hu - One of the best experts on this subject based on the ideXlab platform.
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temperature evaluation of traveling wave ultrasonic motor considering interaction between temperature rise and motor parameters
Ultrasonics, 2015Co-Authors: Shiyang Li, Wenchu Ou, Ming Yang, Chao Guo, Cunyue Lu, Junhui HuAbstract:Abstract In this paper, a novel model for evaluating the temperature of traveling-wave ultrasonic motor (TWUSM) is developed. The proposed model, where the interaction between the temperature rise and motor parameters is considered, differs from the previous reported models with constant parameters. In this model, losses and temperature rises of the motor were evaluated based on the temperature-related varying parameters: the Feedback Voltage Vaux of the stator, dielectric permittivity ɛ and dielectric loss factor tan δ. At each new temperature, Vaux, ɛ and tan δ were updated. The feasibility and effectiveness of this proposed model was verified by comparing the predicted temperatures with the measured one. The effects of driving Voltage, driving frequency and ambient temperature on the predicted temperature were also analyzed. The results show that the proposed model has more accurate predicted temperature than that with constant parameters. This will be very useful for the optimal design, reducing the heat loss, improvement of control and reliability life of TWUSM.
Chunyen Chen - One of the best experts on this subject based on the ideXlab platform.
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boundary conduction mode controlled power factor corrector with line Voltage recovery and total harmonic distortion improvement techniques
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Chunyen Chen, Jenchieh Tsai, Yiting Chen, Kehorng ChenAbstract:The proposed line Voltage recovery (LVR) and the total harmonic distortion improvement (THDI) technique improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range in boundary conduction mode controlled power factor corrector (PFC). The LVR detects the input line root-mean-square Voltage to generate the digital equivalent code to the THDI for optimizing the THD by tuning the on-time value at different line Voltages. In addition, the LVR and the THDI provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC controller can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate that the peak PF value is 0.998 and the minimum THD is 1.7% by the test circuit fabricated in a TSMC 800-V ultrahigh-Voltage process with the universal line Voltage range of 90-264 V.
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high pf and ultra low thd power factor correction controller by sinusoidal wave synthesis and optimized thd control
International Symposium on Circuits and Systems, 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
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ISCAS - High-PF and ultra-low-THD power factor correction controller by sinusoidal-wave synthesis and optimized THD control
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
Jenchieh Tsai - One of the best experts on this subject based on the ideXlab platform.
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boundary conduction mode controlled power factor corrector with line Voltage recovery and total harmonic distortion improvement techniques
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Chunyen Chen, Jenchieh Tsai, Yiting Chen, Kehorng ChenAbstract:The proposed line Voltage recovery (LVR) and the total harmonic distortion improvement (THDI) technique improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range in boundary conduction mode controlled power factor corrector (PFC). The LVR detects the input line root-mean-square Voltage to generate the digital equivalent code to the THDI for optimizing the THD by tuning the on-time value at different line Voltages. In addition, the LVR and the THDI provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC controller can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate that the peak PF value is 0.998 and the minimum THD is 1.7% by the test circuit fabricated in a TSMC 800-V ultrahigh-Voltage process with the universal line Voltage range of 90-264 V.
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high pf and ultra low thd power factor correction controller by sinusoidal wave synthesis and optimized thd control
International Symposium on Circuits and Systems, 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
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ISCAS - High-PF and ultra-low-THD power factor correction controller by sinusoidal-wave synthesis and optimized THD control
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013Co-Authors: Chihwei Chang, Chialung Ni, Jenchieh Tsai, Longder Chen, Yiting Chen, Chunyen Chen, Kehorng Chen, Chengchen YangAbstract:The proposed sinusoidal-wave synthesis (SWS) and the optimized THD control (OTC) improve power factor (PF) and total harmonic distortion (THD) over a wide line Voltage range. The SWS detects the input line root-mean-square (rms) Voltage to generate the digital equivalent code to the OTC for optimizing the THD by tuning the on-time value. Besides, the SWS and the OTC provide a feedforward path to reduce the ripple of the Feedback Voltage for further improving the THD. Therefore, the PFC converter can keep high PF and low THD over a wide line Voltage. Experimental results demonstrate the PF is higher than 0.99 and the THD is 1.7% at VAC of 90-110V by the test circuit fabricated in TSMC 800V UHV process.
