Patents by Inventor Chih-Hsing Fang
Chih-Hsing Fang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8971058Abstract: A high-efficiency high step-up ratio direct current converter with an interleaved soft-switching mechanism is provided. The direct current converter includes a voltage-multiplier circuit and an active clamping circuit. The voltage-multiplier circuit includes two isolating transformers, two main switches disposed on a primary side of the two isolating transformers, four diodes disposed on a secondary side of the two isolating transformers and four capacitors disposed on the secondary side of two isolating transformers, configured to boost a voltage of a direct-current power to a desired voltage value. The active clamping circuit, electrically connected to the voltage-multiplier circuit, includes two active clamp switches and a clamp capacitor to lower a voltage surge of the two main switches so that the two main switches and the two active clamp switches can be soft switched on.Type: GrantFiled: August 23, 2012Date of Patent: March 3, 2015Assignee: Allis Electric Co., Ltd.Inventors: Ching-Tsai Pan, Ming-Chieh Cheng, Ching-Ming Lai, Yen-Liang Chou, Chih-Hsing Fang, Wen-Wei Chan
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Publication number: 20140056032Abstract: A high-efficiency high step-up ratio direct current converter with an interleaved soft-switching mechanism is provided. The direct current converter includes a voltage-multiplier circuit and an active clamping circuit. The voltage-multiplier circuit includes two isolating transformers, two main switches disposed on a primary side of the two isolating transformers, four diodes disposed on a secondary side of the two isolating transformers and four capacitors disposed on the secondary side of two isolating transformers, configured to boost a voltage of a direct-current power to a desired voltage value. The active clamping circuit, electrically connected to the voltage-multiplier circuit, includes two active clamp switches and a clamp capacitor to lower a voltage surge of the two main switches so that the two main switches and the two active clamp switches can be soft switched on.Type: ApplicationFiled: August 23, 2012Publication date: February 27, 2014Applicant: ALLIS ELECTRIC CO., LTD.Inventors: Ching-Tsai Pan, Ming-Chieh Cheng, Ching-Ming Lai, Yen-Liang Chou, Chih-Hsing Fang, Wen-Wei Chan
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Patent number: 8493753Abstract: A photovoltaic powered system and an alternating current (AC) module thereof are disclosed. The photovoltaic powered system provides a direct current (DC) power through a photovoltaic module and converts the DC power into an AC power, which is grid-connected to an AC utility power. The AC module of the photovoltaic powered system produces a continuous quasi-sinusoidal current and the quasi-sinusoidal current is converted into a sinusoidal current. The high-frequency harmonic components of the sinusoidal current are filtered to produce a sinusoidal output current in phase with the AC utility power, thus realizing the maximum power point tracking (MPPT) of the photovoltaic module and feeding unity-power-factor power into the AC utility power.Type: GrantFiled: March 7, 2011Date of Patent: July 23, 2013Assignee: Allis Electric Co., Ltd.Inventors: Ching-Ming Lai, Ching-Tsai Pan, Chih-Hsing Fang, Wen-Wei Chan, Ming-Chieh Cheng
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Patent number: 8411473Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.Type: GrantFiled: December 20, 2010Date of Patent: April 2, 2013Assignee: Allis Electric Co., Ltd.Inventors: Chaur-Ping Cheng, Chih-Hsing Fang, Wen-Wei Chan, Po-Yuan Chen
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Publication number: 20120230066Abstract: A photovoltaic powered system and an alternating current (AC) module thereof are disclosed. The photovoltaic powered system provides a direct current (DC) power through a photovoltaic module and converts the DC power into an AC power, which is grid-connected to an AC utility power. The AC module of the photovoltaic powered system produces a continuous quasi-sinusoidal current and the quasi-sinusoidal current is converted into a sinusoidal current. The high-frequency harmonic components of the sinusoidal current are filtered to produce a sinusoidal output current in phase with the AC utility power, thus realizing the maximum power point tracking (MPPT) of the photovoltaic module and feeding unity-power-factor power into the AC utility power.Type: ApplicationFiled: March 7, 2011Publication date: September 13, 2012Inventors: Ching-Ming LAI, Ching-Tsai Pan, Chih-Hsing Fang, Wen-Wei Chan, Ming-Chieh Cheng
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Publication number: 20120155124Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.Type: ApplicationFiled: December 20, 2010Publication date: June 21, 2012Inventors: Chaur-Ping CHENG, Chih-Hsing Fang, Wen-Wei Chan, Po-Yuan Chen
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Patent number: 7148639Abstract: A compensating circuit for compensating the terminal voltage on the armature in a sensorless type DC brushless motor apparatus is described. The driving circuit of the motor apparatus outputs a three-phase power, and each phase is connected with a compensating circuit. The compensating circuit has a reference voltage, a resistance device, a diode device, a differential amplifier and a processor. The two terminals of the resistance device are respectively connected to the reference voltage and the anode of the diode device. The cathode of the diode device is connected to an output of the three-phase power supply. The two input terminals of the differential amplifier are respectively connected to the two terminals of the resistance device. The processor accepts the signal output from the differential amplifier and then calculates and outputs a compensating voltage.Type: GrantFiled: December 27, 2005Date of Patent: December 12, 2006Assignee: Industrial Technology Research InstituteInventors: Ming-Che Yang, Tai-Ming Huang, Chih-Hsin Chen, Mu-Ping Chen, Chih-Hsing Fang, Kuo-Ing Hwu
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Publication number: 20060145495Abstract: A finger device for grasping objects is disclosed, which comprises multiple base members and a driving belt. Each base member comprises a main body, a first axle defined in the main body, a second axle defined in the main body, an elastic member and a binding member. The binding member is used for connecting the neighboring main bodies for continuous motion. The elastic member also connects the neighboring main bodies for changing or recovering the relative positions of the main bodies. The first axle and the second axle of one base member are located along a different line from the first axle of another base member, and the driving belt is used for connecting to the first axle and the second axle of each base member. Therefore, as the driving belt is pulled, the relative positions of the main bodies change and the finger device bends.Type: ApplicationFiled: December 22, 2005Publication date: July 6, 2006Applicant: Industrial Technology Research InstituteInventors: Chih-Hsing Fang, Wen-Nan Huang, Chien-Wu Chen, Chih-Hsin Chen
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Publication number: 20060145641Abstract: A compensating circuit for compensating the terminal voltage on the armature in a sensorless type DC brushless motor apparatus is described. The driving circuit of the motor apparatus outputs a three-phase power, and each phase is connected with a compensating circuit. The compensating circuit has a reference voltage, a resistance device, a diode device, a differential amplifier and a processor. The two terminals of the resistance device are respectively connected to the reference voltage and the anode of the diode device. The cathode of the diode device is connected to an output of the three-phase power supply. The two input terminals of the differential amplifier are respectively connected to the two terminals of the resistance device. The processor accepts the signal output from the differential amplifier and then calculates and outputs a compensating voltage.Type: ApplicationFiled: December 27, 2005Publication date: July 6, 2006Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ming-Che Yang, Tai-Ming Huang, Chih-Hsin Chen, Mu-Ping Chen, Chih-Hsing Fang, Kuo-Ing Hwu
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Patent number: 7045985Abstract: A reluctance force brake device applies the coupling and combining concept of the reluctance braking unit to the original rotating source or say mechanical rotation axle for kinetic energy output. The reluctance braking unit, utilizing electrical energy from forward electrical energy source or brake reverse recover energy, generates the reverse reluctance force to reduce the speed of rotating source to operate brake action. The driving design can be extended to absorb the brake reverse recovery energy for recycling in motives related applications, which can help to upgrade or replace the bake system of traditional mechanical vehicles or electrical vehicles, and improve the applicability for drive-by-wire development trend.Type: GrantFiled: August 5, 2004Date of Patent: May 16, 2006Assignee: Industrial Technology Research InstituteInventors: Wen-Nan Huang, Ching-Cheng Teng, Wan-Pei Chen, Chih-Hsing Fang, Mu-Ping Chen
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Publication number: 20050194923Abstract: A reluctance force brake device applies the coupling and combining concept of the reluctance braking unit to the original rotating source or say mechanical rotation axle for kinetic energy output. The reluctance braking unit, utilizing electrical energy from forward electrical energy source or brake reverse recover energy, generates the reverse reluctance force to reduce the speed of rotating source to operate brake action. The driving design can be extended to absorb the brake reverse recovery energy for recycling in motives related applications, which can help to upgrade or replace the bake system of traditional mechanical vehicles or electrical vehicles, and improve the applicability for drive-by-wire development trend.Type: ApplicationFiled: August 5, 2004Publication date: September 8, 2005Inventors: Wen-Nan Huang, Ching-Cheng Teng, Wan-Pei Chen, Chih-Hsing Fang, Mu-Ping Chen
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Patent number: 6935121Abstract: A reciprocating and rotating magnetic refrigeration apparatus adopts a dynamo concept and the design of magnetic supply path and heat transfer unit to alternately magnetize and demagnetize a magnetocaloric material to generate thermo-magnetic effect for cooling. The apparatus includes magnetocaloric material located on the head of stator nose poles, magnetic supply coils surrounding the magnetocaloric material, permanent magnets located on a rotating stator, and a heat transfer unit in contact with the magnetocaloric material. Two adjacent magnetocaloric materials magnetize and demagnetize alternately to alter the temperature and entropy of the magnetocaloric material, and through the heat transfer unit, heat exchange occurs between the magnetocaloric materials and the atmosphere to achieve the cooling effect.Type: GrantFiled: December 4, 2003Date of Patent: August 30, 2005Assignee: Industrial Technology Research InstituteInventors: Chih-Hsing Fang, Wen-Nan Huang, Chih-Hsin Chen, Wan-Pei Chen, Kuo-Ing Hwu
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Publication number: 20050120720Abstract: A reciprocating and rotating magnetic refrigeration apparatus adopts a dynamo concept and the design of magnetic supply path and heat transfer unit to alternately magnetize and demagnetize a magnetocaloric material to generate thermo-magnetic effect for cooling. The apparatus includes magnetocaloric material located on the head of stator nose poles, magnetic supply coils surrounding the magnetocaloric material, permanent magnets located on a rotating stator, and a heat transfer unit in contact with the magnetocaloric material. Two adjacent magnetocaloric materials magnetize and demagnetize alternately to alter the temperature and entropy of the magnetocaloric material, and through the heat transfer unit, heat exchange occurs between the magnetocaloric materials and the atmosphere to achieve the cooling effect.Type: ApplicationFiled: December 4, 2003Publication date: June 9, 2005Inventors: Chih-Hsing Fang, Wen-Nan Huang, Chih-Hsin Chen, Wan-Pei Chen, K.I. Hwu