Patents by Inventor Magellan Chiu
Magellan Chiu 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: 7483249Abstract: An overvoltage protective device for DC motor is disclosed. The device includes a voltage-dividing circuit and a control unit, and is electrically connected to a DC motor in parallel. The voltage-dividing circuit has one end thereof electrically connected to an input voltage of the DC motor, and the other end thereof grounded. The control unit is electrically connected to a part of the voltage-dividing circuit for accessing a voltage level thereof and thereby driving the DC motor.Type: GrantFiled: October 31, 2003Date of Patent: January 27, 2009Assignee: Delta Electronics, Inc.Inventors: Lain-ken Lin, Magellan Chiu, Venson Kuo, Wen-shi Huang
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Patent number: 7459876Abstract: Motors comprising stators and rotors having a plurality of north poles and south poles and methods of controlling the same. A first sensor and a second sensor are provided. The first and second sensors are disposed on the stator in a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor. If any one of the first and second sensors continuously detects a north pole or a south pole for a predetermined duration, the motor is shut off.Type: GrantFiled: December 20, 2004Date of Patent: December 2, 2008Assignee: Delta Electronics, Inc.Inventors: Magellan Chiu, Venson Kuo, Wen-Shi Huang, Ming-Shi Tsai
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Publication number: 20080054978Abstract: A level-determining device of pulse width modulation (PWM) signal includes a PWM signal generating circuit, a reference voltage generating circuit and a determining circuit. The PWM signal generating circuit generates a first PWM signal. The reference voltage generating circuit generates a reference voltage signal. The determining circuit is respectively electrically connected to the PWM signal generating circuit and the reference voltage generating circuit for determining high level or low level of the first PWM signal in accordance with the reference voltage signal for generating a second PWM signal.Type: ApplicationFiled: August 8, 2007Publication date: March 6, 2008Inventors: Magellan Chiu, Venson Kuo
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Patent number: 7327589Abstract: A full-bridge circuit for a heat dissipation system. The heat dissipation system further includes a fan and a control circuit. The control circuit outputs a first control signal and a second control signal. The full-bridge circuit includes a first control line having a first switch and a third switch serially coupled, a second control line includes a second switch and a fourth switch serially coupled, and a induction coil having one terminal coupled between the first and third switches and the other terminal coupled between the second and fourth switches. The ON/OFF states of the first and second switches are controlled by the first and second control signals respectively. The ON/OFF states of the third and fourth switches are controlled by two driving voltage sources respectively.Type: GrantFiled: June 7, 2005Date of Patent: February 5, 2008Assignee: Delta Electronics, Inc.Inventors: Magellan Chiu, Chun-Lung Chiu, Wei-Shuo Tseng, Ming-Shi Tsai
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Patent number: 7224137Abstract: The present invention provides an instantaneous fan stopping method and structure thereof. The method and structure can eliminate the inertial rotating state of the fan when the power supplied to the fan is cut off. In accordance with the present invention, a closed circuit is formed between the two terminals of the coil used to drive the fan. When the closed circuit is formed, the inertial rotation of the fan can generate an induced current in this coil, which, in turn, generates a magnetic force to stop the fan.Type: GrantFiled: February 24, 2005Date of Patent: May 29, 2007Assignee: Delta Electronics, Inc.Inventors: Magellan Chiu, Chun-Lung Chiu, Po-Tsun Kuo, Wen-Shi Huang
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Patent number: 6982531Abstract: A driving circuit for switches of direct current fan motor is disclosed. The driving circuit includes a plurality of switches, a first control circuit, and a second circuit. The switches are driven by a first pulse width modulation signal and a second pulse width modulation signal, and they are electrically connected with the direct current fan motor in a bridge manner. A third pulse width modulation signal is used to drive the first control circuit connected to at least one of the switches driven by the first pulse width modulation signal. A fourth pulse width modulation signal is used to drive the second control circuit connected to at least one of the switches driven by the second pulse width modulation signal. Especially, either the first pulse width modulation signal or the second pulse width modulation signal is selected as the third pulse width modulation signal or the fourth pulse width modulation signal.Type: GrantFiled: August 29, 2003Date of Patent: January 3, 2006Assignee: Delta Electronics, Inc.Inventors: Lain-ken Lin, Sans Chang, Magellan Chiu, Wen-shi Huang
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Publication number: 20050270815Abstract: A full-bridge circuit for a heat dissipation system. The heat dissipation system further includes a fan and a control circuit. The control circuit outputs a first control signal and a second control signal. The full-bridge circuit includes a first control line having a first switch and a third switch serially coupled, a second control line includes a second switch and a fourth switch serially coupled, and a induction coil having one terminal coupled between the first and third switches and the other terminal coupled between the second and fourth switches. The ON/OFF states of the first and second switches are controlled by the first and second control signals respectively. The ON/OFF states of the third and fourth switches are controlled by two driving voltage sources respectively.Type: ApplicationFiled: June 7, 2005Publication date: December 8, 2005Inventors: Magellan Chiu, Chun-Lung Chiu, Wei-Shuo Tseng, Ming-Shi Tsai
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Publication number: 20050257537Abstract: A fan speed control system. A temperature and humidity sensing unit detects environmental temperature and humidity and outputs a corresponding electrical signal. A micro-control unit receives and processes the electrical signal to obtain a digital signal, and sends the digital signal to the fan motor circuit to control fan speed accordingly.Type: ApplicationFiled: March 10, 2005Publication date: November 24, 2005Inventors: Sans Chang, Magellan Chiu, Chun-Lung Chiu, Ming-Shi Tsai
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Publication number: 20050194849Abstract: Motors comprising stators and rotors having a plurality of north poles and south poles and methods of controlling the same. A first sensor and a second sensor are provided. The first and second sensors are disposed on the stator in a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor. If any one of the first and second sensors continuously detects a north pole or a south pole for a predetermined duration, the motor is shut off.Type: ApplicationFiled: December 20, 2004Publication date: September 8, 2005Inventors: Magellan Chiu, Venson Kuo, Wen-Shi Huang, Ming-Shi Tsai
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Publication number: 20050184692Abstract: The present invention provides an instantaneous fan stopping method and structure thereof. The method and structure can eliminate the inertial rotating state of the fan when the power supplied to the fan is cut off. In accordance with the present invention, a closed circuit is formed between the two terminals of the coil used to drive the fan. When the closed circuit is formed, the inertial rotation of the fan can generate an induced current in this coil, which, in turn, generates a magnetic force to stop the fan.Type: ApplicationFiled: February 24, 2005Publication date: August 25, 2005Inventors: Magellan Chiu, Chun-Lung Chiu, Po-Tsun Kuo, Wen-Shi Huang
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Publication number: 20040264948Abstract: A driving circuit for switches of direct current fan motor is disclosed. The driving circuit includes a plurality of switches, a first control circuit, and a second circuit. The switches are driven by a first pulse width modulation signal and a second pulse width modulation signal, and they are electrically connected with the direct current fan motor in a bridge manner. A third pulse width modulation signal is used to drive the first control circuit connected to at least one of the switches driven by the first pulse width modulation signal. A fourth pulse width modulation signal is used to drive the second control circuit connected to at least one of the switches driven by the second pulse width modulation signal. Especially, either the first pulse width modulation signal or the second pulse width modulation signal is selected as the third pulse width modulation signal or the fourth pulse width modulation signal.Type: ApplicationFiled: August 29, 2003Publication date: December 30, 2004Inventors: Lain-ken Lin, Sans Chang, Magellan Chiu, Wen-shi Huang
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Publication number: 20040264086Abstract: An overvoltage protective device for DC motor is disclosed. The device includes a voltage-dividing circuit and a control unit, and is electrically connected to a DC motor in parallel. The voltage-dividing circuit has one end thereof electrically connected to an input voltage of the DC motor, and the other end thereof grounded. The control unit is electrically connected to a part of the voltage-dividing circuit for accessing a voltage level thereof and thereby driving the DC motor.Type: ApplicationFiled: October 31, 2003Publication date: December 30, 2004Inventors: Lain-Ken Lin, Magellan Chiu, Venson Kuo, Wen-Shi Huang