The Experts below are selected from a list of 5577 Experts worldwide ranked by ideXlab platform
Ruey-hsun Liang - One of the best experts on this subject based on the ideXlab platform.
-
An Indirect Current Phase Detection Method Applied to Automatic Phase Compensation Driver for 1Φ BLDC Fan Motor
Electric Power Components and Systems, 2018Co-Authors: Zong-hong Tang, Yie-tone Chen, Chun-lung Chiu, Ruey-hsun LiangAbstract:AbstractThe inductance of the stator winding of BLDC Motors will cause the current to lag behind the back-EMF, and the lag will result in the drop of the operating efficiency and increase the acoustic noise and vibration of the Fan Motor. This article proposes a low cost, simple structure, and more efficient method to perform the phase compensation. The indirect method to detect the zero-crossing point (ZCP) of the winding current will avoid the extra power loss of the current sensor. The automatic phase compensation utilizes the phase difference detection of the back-EMF and winding current and then switches the power transistors with the phase advance automatically to eliminate the current lag. The related experimental results corroborate the feasibility and effectiveness of the proposed driving method.
-
a driver for the single phase brushless dc Fan Motor with hybrid winding structure
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, Yiruey Jhang, Ruey-hsun LiangAbstract:This paper mainly proposes a novel driver for a single-phase brushless dc Fan Motor with a hybrid series/parallel winding structure. The winding symbols and directions of the hybrid Motor stator structure are defined, and the winding steps for the proposed series/parallel winding are explained. An adequate inverter driving circuit, which is capable to simultaneously obtain the advantages of the hybrid structure, is also discussed. At last, the overall system of this hybrid brushless dc Motor with the proposed driving circuit is then implemented to verify the performance of the proposed driver and structure.
-
Optimizing Efficiency Driver Comprising Phase-Locked Loop for the Single-Phase Brushless DC Fan Motor
IEEE Transactions on Magnetics, 2012Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, You-len Liang, Ruey-hsun LiangAbstract:Because the single-phase brushless Fan Motor presents an inductive load, the winding current will lag the back-electromotive force (EMF) an unequal phase based on the different Motor speed. In order to improve the efficiency and torque performance, adjusting the commutation angle to keep the optimizing commutation at different speed is necessary. In this paper, the new structure with low cost to achieve the optimizing commutation is accomplished by the concept of phase-locked loop (PLL) to synchronize the winding current and back EMF. The PLL IC CD4046 is adopted to develop a feedback circuit and performs the function of phase advance. The purpose is to force the winding current to be synchronized with the back-EMF. Finally, the related experimental results are used to confirm the feasibility and effectiveness of the proposed driving method.
-
optimal driving efficiency design for the single phase brushless dc Fan Motor
IEEE Transactions on Magnetics, 2010Co-Authors: Chun-lung Chiu, Yie-tone Chen, You-len Liang, Ruey-hsun LiangAbstract:One of the methods to improve efficiency and torque performance of the single-phase brushless DC (BLDC) Motor is to find out the optimum commutation angle at each different speed. We used the finite-element method (FEM) to simulate the back-EMF voltage and the coil current for the single-phase BLDC Motor, and then adjust the conduction time of switches by detecting the waveform of coil current. The Motor can improve its efficiency, noise, and vibration when it obtains the optimal shift angle of each speed. We used PSPICE to verify the exactness of FEM simulation results of the single-phase BLDC Motor. We adopted Microchip's dsPIC30F4011 digital signal processor (DSP) to process the Hall signal and the driving signals of switches of the driving system prototype of the single-phase BLDC Fan Motor. Finally, we used the related experimental results to confirm the feasibility and effectiveness of the proposed driver.
Yie-tone Chen - One of the best experts on this subject based on the ideXlab platform.
-
An Indirect Current Phase Detection Method Applied to Automatic Phase Compensation Driver for 1Φ BLDC Fan Motor
Electric Power Components and Systems, 2018Co-Authors: Zong-hong Tang, Yie-tone Chen, Chun-lung Chiu, Ruey-hsun LiangAbstract:AbstractThe inductance of the stator winding of BLDC Motors will cause the current to lag behind the back-EMF, and the lag will result in the drop of the operating efficiency and increase the acoustic noise and vibration of the Fan Motor. This article proposes a low cost, simple structure, and more efficient method to perform the phase compensation. The indirect method to detect the zero-crossing point (ZCP) of the winding current will avoid the extra power loss of the current sensor. The automatic phase compensation utilizes the phase difference detection of the back-EMF and winding current and then switches the power transistors with the phase advance automatically to eliminate the current lag. The related experimental results corroborate the feasibility and effectiveness of the proposed driving method.
-
a driver for the single phase brushless dc Fan Motor with hybrid winding structure
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, Yiruey Jhang, Ruey-hsun LiangAbstract:This paper mainly proposes a novel driver for a single-phase brushless dc Fan Motor with a hybrid series/parallel winding structure. The winding symbols and directions of the hybrid Motor stator structure are defined, and the winding steps for the proposed series/parallel winding are explained. An adequate inverter driving circuit, which is capable to simultaneously obtain the advantages of the hybrid structure, is also discussed. At last, the overall system of this hybrid brushless dc Motor with the proposed driving circuit is then implemented to verify the performance of the proposed driver and structure.
-
Optimizing Efficiency Driver Comprising Phase-Locked Loop for the Single-Phase Brushless DC Fan Motor
IEEE Transactions on Magnetics, 2012Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, You-len Liang, Ruey-hsun LiangAbstract:Because the single-phase brushless Fan Motor presents an inductive load, the winding current will lag the back-electromotive force (EMF) an unequal phase based on the different Motor speed. In order to improve the efficiency and torque performance, adjusting the commutation angle to keep the optimizing commutation at different speed is necessary. In this paper, the new structure with low cost to achieve the optimizing commutation is accomplished by the concept of phase-locked loop (PLL) to synchronize the winding current and back EMF. The PLL IC CD4046 is adopted to develop a feedback circuit and performs the function of phase advance. The purpose is to force the winding current to be synchronized with the back-EMF. Finally, the related experimental results are used to confirm the feasibility and effectiveness of the proposed driving method.
-
optimal driving efficiency design for the single phase brushless dc Fan Motor
IEEE Transactions on Magnetics, 2010Co-Authors: Chun-lung Chiu, Yie-tone Chen, You-len Liang, Ruey-hsun LiangAbstract:One of the methods to improve efficiency and torque performance of the single-phase brushless DC (BLDC) Motor is to find out the optimum commutation angle at each different speed. We used the finite-element method (FEM) to simulate the back-EMF voltage and the coil current for the single-phase BLDC Motor, and then adjust the conduction time of switches by detecting the waveform of coil current. The Motor can improve its efficiency, noise, and vibration when it obtains the optimal shift angle of each speed. We used PSPICE to verify the exactness of FEM simulation results of the single-phase BLDC Motor. We adopted Microchip's dsPIC30F4011 digital signal processor (DSP) to process the Hall signal and the driving signals of switches of the driving system prototype of the single-phase BLDC Fan Motor. Finally, we used the related experimental results to confirm the feasibility and effectiveness of the proposed driver.
Chun-lung Chiu - One of the best experts on this subject based on the ideXlab platform.
-
An Indirect Current Phase Detection Method Applied to Automatic Phase Compensation Driver for 1Φ BLDC Fan Motor
Electric Power Components and Systems, 2018Co-Authors: Zong-hong Tang, Yie-tone Chen, Chun-lung Chiu, Ruey-hsun LiangAbstract:AbstractThe inductance of the stator winding of BLDC Motors will cause the current to lag behind the back-EMF, and the lag will result in the drop of the operating efficiency and increase the acoustic noise and vibration of the Fan Motor. This article proposes a low cost, simple structure, and more efficient method to perform the phase compensation. The indirect method to detect the zero-crossing point (ZCP) of the winding current will avoid the extra power loss of the current sensor. The automatic phase compensation utilizes the phase difference detection of the back-EMF and winding current and then switches the power transistors with the phase advance automatically to eliminate the current lag. The related experimental results corroborate the feasibility and effectiveness of the proposed driving method.
-
a driver for the single phase brushless dc Fan Motor with hybrid winding structure
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, Yiruey Jhang, Ruey-hsun LiangAbstract:This paper mainly proposes a novel driver for a single-phase brushless dc Fan Motor with a hybrid series/parallel winding structure. The winding symbols and directions of the hybrid Motor stator structure are defined, and the winding steps for the proposed series/parallel winding are explained. An adequate inverter driving circuit, which is capable to simultaneously obtain the advantages of the hybrid structure, is also discussed. At last, the overall system of this hybrid brushless dc Motor with the proposed driving circuit is then implemented to verify the performance of the proposed driver and structure.
-
Optimizing Efficiency Driver Comprising Phase-Locked Loop for the Single-Phase Brushless DC Fan Motor
IEEE Transactions on Magnetics, 2012Co-Authors: Yie-tone Chen, Chun-lung Chiu, Zong-hong Tang, You-len Liang, Ruey-hsun LiangAbstract:Because the single-phase brushless Fan Motor presents an inductive load, the winding current will lag the back-electromotive force (EMF) an unequal phase based on the different Motor speed. In order to improve the efficiency and torque performance, adjusting the commutation angle to keep the optimizing commutation at different speed is necessary. In this paper, the new structure with low cost to achieve the optimizing commutation is accomplished by the concept of phase-locked loop (PLL) to synchronize the winding current and back EMF. The PLL IC CD4046 is adopted to develop a feedback circuit and performs the function of phase advance. The purpose is to force the winding current to be synchronized with the back-EMF. Finally, the related experimental results are used to confirm the feasibility and effectiveness of the proposed driving method.
-
optimal driving efficiency design for the single phase brushless dc Fan Motor
IEEE Transactions on Magnetics, 2010Co-Authors: Chun-lung Chiu, Yie-tone Chen, You-len Liang, Ruey-hsun LiangAbstract:One of the methods to improve efficiency and torque performance of the single-phase brushless DC (BLDC) Motor is to find out the optimum commutation angle at each different speed. We used the finite-element method (FEM) to simulate the back-EMF voltage and the coil current for the single-phase BLDC Motor, and then adjust the conduction time of switches by detecting the waveform of coil current. The Motor can improve its efficiency, noise, and vibration when it obtains the optimal shift angle of each speed. We used PSPICE to verify the exactness of FEM simulation results of the single-phase BLDC Motor. We adopted Microchip's dsPIC30F4011 digital signal processor (DSP) to process the Hall signal and the driving signals of switches of the driving system prototype of the single-phase BLDC Fan Motor. Finally, we used the related experimental results to confirm the feasibility and effectiveness of the proposed driver.
A.j. Heber - One of the best experts on this subject based on the ideXlab platform.
-
A solid-state speed controller for capacitor Motors driving ventilation Fans
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting, 1992Co-Authors: M.m. Morcos, J.a. Mowry, A.j. HeberAbstract:The authors document the design and testing of an electronic speed controller for permanent-split capacitor Motors driving agricultural ventilation Fans. The controller was developed and tested with three commercially available and widely used Fan systems. Linearized temperature versus airflow rate characteristics were obtained. The controller circuit uses an erasable programmable read-only memory (EPROM) chip. The input to the EPROM is an analog representation of temperature converted to digital form. The digital contents then are converted to an analog signal that triggers a triac and consequently controls the voltage input in the Fan Motor. A linearized control characteristic can be obtained by storing appropriate voltage values in the EPROM. These values correspond linearly to the desired Fan speeds. >
-
Solid-state speed controllers for single-phase capacitor Motors
1992Co-Authors: M.m. Morcos, A.j. HeberAbstract:This report documents the design of an electronic speed controller for agricultural ventilation Fans. The controller was developed and tested with three commercially available and widely used Fan systems. Linearized temperature versus airflow rate characteristics were obtained. The controller circuitry uses an erasable programmable read-only memory (EPROM) chip. The input to the EPROM is an analog representation of temperature converted to digital form. The digital contents then are converted to an analog signal that triggers a triac and consequently controls the voltage input to the Fan Motor. A linearized control characteristic, i.e., temperature versus airflow rate, can be obtained by storing appropriate voltage values in the EPROM. These values correspond linearly to the desired Fan speeds.
-
Solid-state speed controllers for single-phase capacitor Motors. Final report
1992Co-Authors: M.m. Morcos, A.j. HeberAbstract:This report documents the design of an electronic speed controller for agricultural ventilation Fans. The controller was developed and tested with three commercially available and widely used Fan systems. Linearized temperature versus airflow rate characteristics were obtained. The controller circuitry uses an erasable programmable read-only memory (EPROM) chip. The input to the EPROM is an analog representation of temperature converted to digital form. The digital contents then are converted to an analog signal that triggers a triac and consequently controls the voltage input to the Fan Motor. A linearized control characteristic, i.e., temperature versus airflow rate, can be obtained by storing appropriate voltage values in the EPROM. These values correspond linearly to the desired Fan speeds.
A. Fazlizan - One of the best experts on this subject based on the ideXlab platform.
-
Design and Experimental Analysis of an Exhaust Air Energy Recovery Wind Turbine Generator
Energies, 2015Co-Authors: A. Fazlizan, Sook Yee Yip, Wen Tong Chong, Wooi Ping Hew, Seng Chee PohAbstract:A vertical axis wind turbine (VAWT) was positioned at the discharge outlet of a cooling tower electricity generator. To avoid a negative impact on the performance of the cooling tower and to optimize the turbine performance, the determination of the VAWT position in the discharge wind stream was conducted by experiment. The preferable VAWT position is where the higher wind velocity matches the positive torque area of the turbine rotation. With the proper matching among the VAWT configurations (blade number, airfoil type, operating tip-speed-ratio, etc. ) and exhaust air profile, the turbine system was not only able to recover the wasted kinetic energy, it also reduced the Fan Motor power consumption by 4.5% and increased the cooling tower intake air flow-rate by 11%. The VAWT had a free running rotational speed of 479 rpm, power coefficient of 10.6%, and tip-speed-ratio of 1.88. The double multiple stream tube theory was used to explain the VAWT behavior in the non-uniform wind stream. For the actual size of a cooling tower with a 2.4 m outlet diameter and powered by a 7.5 kW Fan Motor, it was estimated that a system with two VAWTs (side-by-side) can generate 1 kW of power which is equivalent to 13% of energy recovery.
-
the experimental study on the wind turbine s guide vanes and diffuser of an exhaust air energy recovery system integrated with the cooling tower
Energy Conversion and Management, 2014Co-Authors: Wen Tong Chong, A. FazlizanAbstract:An assembly of two vertical axis wind turbines (VAWTs) and an enclosure is installed above a cooling tower to harness the discharged wind for electricity generation. The enclosure consists of guide-vanes and diffuser-plates, is used to enhance the rotational speed of the turbines for power augmentation. The angle of the guide-vanes is optimized to ensure the oncoming wind stream impinges the rotor blades of the turbine at an optimum angle. The diffuser-plates are tilted at an optimum angle to increase the discharged airflow rate. The performance of the system is tested in the laboratory followed by a field test on an actual size cooling tower. The VAWT performance is increased in the range of 7–8% with the integration of enclosure. There is no significant difference in the current consumption of the Fan Motor between the bare cooling tower and the one with installed VAWTs. With the presence of this system, approximately 17.5 GW h/year is expected to be recovered from 3000 units of cooling towers at commercial areas, assuming the cooling tower is driven by a 7.5 kW Fan Motor and operates 16 h/day. This amount of recovered energy can also be translated into 13% reduction in CO2 emission.
-
Exhaust air energy recovery system for electrical power generation in future green cities
International Journal of Precision Engineering and Manufacturing, 2013Co-Authors: Wen Tong Chong, A. Fazlizan, Sook Yee Yip, Sin Chew Poh, Mei Hyie Koay, Wooi Ping HewAbstract:This paper investigates a technology-driven solution to supply a portion of energy demand in future green cities. An idea on harnessing unnatural wind resources for electricity is presented. Two vertical axis wind turbines with an enclosure are mounted above a cooling tower to recover part of the energy from the exhaust air. Guide-vanes are designed to create a venturi effect and guide the wind before it interacts with the turbine blades. Diffuser-plates help to draw more wind and accelerate the exhaust airflow. Safety concerns that may result from blade failure are minimized by the design of the enclosure. From the laboratory test and field test results, there is no significant difference in the current consumption of the Fan Motor with the installation of the wind turbines. The integration of the enclosure has shown an improvement on the turbine’s rotational speed which is 30.4% higher. The electricity generated from this system can be fed into the electricity grid. For 3000 units of cooling tower (2 m outlet diameter powered by a 7.5 kW Fan Motor and operated for 16 hours/day), 13% of the energy to power the Fan Motor is expected to be recovered from this system which equals 17.5 GWh/year.
