Patents Assigned to Power Devices, Inc.
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Publication number: 20240094417Abstract: A detector including a resistance measuring device connected to a first conductive wire and a second conductive wire. The detector can be formed of a material that experiences Radiation Induced Conductivity (MC) when exposed to radiation and can be placed in a radiation field to measure electrical resistivity of the detector and the radiation field to gauge a strength of the radiation field. As the radiation field increases, the electrical resistivity of the detector decreases. Additionally, a combination detector can include a first detector with a first wire and a first material, and a second detector with a second wire coated with a coating comprising a fast or thermal neutron absorber. When placed in the thermal neutron field, the coating on the second detector removes a portion of thermal neutrons and leaves RIC effects on the second wire below the coating due to a remaining portion of thermal neutrons.Type: ApplicationFiled: September 15, 2023Publication date: March 21, 2024Applicant: Surt and Hod Thermal Power Devices, Inc.Inventors: Troy Michael HOWE, Brianna CLEMENTS
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Patent number: 11165351Abstract: A conversion apparatus with oscillation reduction control includes a conversion circuit and an oscillation reduction control circuit. The conversion circuit includes a transformer, a rectifying circuit, and a first switch. The oscillation reduction control circuit stores a leakage inductance energy of the transformer when the first switch is turned off, and the oscillation reduction control provides the leakage inductance energy to a primary-side winding of the transformer when the first switch is turned on.Type: GrantFiled: September 10, 2020Date of Patent: November 2, 2021Assignee: Asian Power Devices Inc.Inventors: Yeu-Torng Yau, Tsung-Liang Hung
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Patent number: 11018593Abstract: A dual-mode active clamp flyback converter includes a transformer circuit, a clamping energy storage circuit, and a main switch circuit. The transformer circuit is coupled to a load, and the transformer circuit includes an auxiliary winding. The clamping energy storage circuit is coupled to the transformer circuit. If the load as a heavy loading, the clamping energy storage circuit is turned on. If the load as a light loading, the clamping energy storage circuit is turned off. The main switch circuit is coupled to the transformer circuit. When the main switch circuit is turned on, the auxiliary winding releases energy to a primary-side winding of the transformer circuit.Type: GrantFiled: December 18, 2019Date of Patent: May 25, 2021Assignee: Asian Power Devices Inc.Inventors: Yeu-Torng Yau, Tsung-Liang Hung
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Patent number: 10826468Abstract: An active damping circuit of dead time oscillation includes a damping unit, a main switch, a voltage biased unit, an auxiliary switch, and a voltage determining unit. The main switch is coupled to the damping unit. The voltage biased unit is coupled to the damping unit and the main switch, and the voltage biased unit provides a drive voltage to the main switch. The auxiliary switch is coupled to the voltage biased unit. The voltage determining unit is coupled to the auxiliary switch, the voltage biased unit, and the damping unit, and the voltage determining unit provides a threshold voltage. When a voltage across two ends of a winding of a transformer is less than the threshold voltage, the auxiliary switch is turned off so that the drive voltage turns on the main switch and enable the damping unit to suppress the dead time oscillation.Type: GrantFiled: December 18, 2019Date of Patent: November 3, 2020Assignee: Asian Power Devices Inc.Inventors: Ganghong Liu, Wei Tang
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Patent number: 9954457Abstract: An overvoltage protection circuit adapted for a switching power supply is provided. The overvoltage protection circuit can use the time difference of the start of the overvoltage protection to distinguish that the overvoltage of the output voltage of the switching power supply is caused by the failure of the internal feedback or by the internal power supply, thereby avoiding a short and harmless external power supply to affect the normal operation of the switching power supply but can immediately stop the switching power supply to achieve protection when the switching power supply has an internal feedback failure.Type: GrantFiled: August 22, 2017Date of Patent: April 24, 2018Assignee: Asian Power Devices Inc.Inventor: Chih-Yuan Hsu
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Patent number: 9407136Abstract: A passive coupled-inductor soft-switching circuit of a power factor corrector is provided. The passive coupled-inductor soft-switching circuit includes a power input terminal, a first inductor, a first diode, a power output terminal, a power switch and a buffer circuit. The first inductor has a first terminal and a second terminal, wherein the first terminal of the first inductor is electrically coupled with the power input terminal. The first diode has a positive terminal and a negative terminal, wherein the positive terminal of the first diode is electrically coupled with the second terminal of the first inductor. The power output terminal is electrically coupled with the negative terminal of the first diode. The buffer circuit is electrically coupled with the power switch. By using the buffer circuit, the voltage and current have phase interlacing shifts and thereby reducing the switching loss.Type: GrantFiled: June 23, 2015Date of Patent: August 2, 2016Assignee: Asian Power Devices Inc.Inventors: Tsung-Liang Hung, Yeu-Torng Yau
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Publication number: 20140049992Abstract: A switching power supply is suitable for transforming AC input voltage to DC output voltage. The switching power supply includes a transformer, a power circuit, an output circuit, a switching element, a control element, a shielding element and a metal element. The power circuit is coupled to the primary side of the transformer to receive AC input voltage. The output circuit is coupled to the secondary side of the transformer to provide DC output voltage to the load. The switching element is coupled to the primary side of the transformer, and is coupled to the primary side ground. The control element is coupled to the switching element to control the switch of the switching element. The shielding element is surrounded onto the transformer, and is coupled to the primary side ground. The metal element is leaned against the switching element, and is coupled to the primary side ground.Type: ApplicationFiled: May 28, 2013Publication date: February 20, 2014Applicant: Asian Power Devices Inc.Inventor: Po-Yang Lu
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Patent number: 8556642Abstract: A power supply structure includes a main body and a plug. The main body has a circular containing space, a cylinder and a plurality of conducting plates. The cylinder has a retaining plane and at least one annular groove. The plug has a plug seat and a first cylinder. The first cylinder has a protrusion and at least one elastic device on an inner side of the bottom of the first cylinder. The elastic device has a resilient arm and a pressing member. The annular groove has a stop block and a fixing space. The protrusion is provided and placed into the annular groove, so that the plug can be fixed into the main body.Type: GrantFiled: September 28, 2011Date of Patent: October 15, 2013Assignee: Asian Power Devices Inc.Inventors: Yu-Ci Lai, Chuei-Hang Ciou, Da-Wei Lee
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Patent number: 7675240Abstract: A light emitting diode (LED) circuit having even current has multiple LED strings, a current equalizing integrated circuit (IC) and a voltage compensation module. The LED strings are connected to an external power source, and each LED string has a power terminal and a driving terminal. The current equalizing IC has multiple driving pins connected respectively to the driving terminals of the LED strings. The voltage compensation module is connected between the LED strings and the external power source and has a threshold voltage value and multiple input terminals. The input terminals are connected respectively to the driving pins of the current equalizing IC to allow the voltage compensation module rise and send the voltage obtained from the external power source to the LED strings when the voltage compensation module determines any voltage on the driving pins of the current equalizing IC is lower than the threshold voltage value.Type: GrantFiled: December 12, 2007Date of Patent: March 9, 2010Assignee: Asian Power Devices Inc.Inventors: Cheng-Chang Yang, Guang-Ming Lei, Yu-Chi Lai
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Patent number: 7602151Abstract: A charger with output voltage compensation includes an AC/DC circuit, an output interface, a charge controller, and a compensator. The AC/DC circuit converts an AC source into a DC source. The voltage of the DC source is elevated by a transformer and used to charge a battery via the output interface. The charge controller can further increase the voltage of the output interface in order to accelerate battery charging. The compensator compensates the voltage wasted by the circuit. Therefore, the invention can overcome energy waste caused by the internal resistance in the circuit, achieving satisfactory charging effects.Type: GrantFiled: November 7, 2006Date of Patent: October 13, 2009Assignee: Asian Power Devices Inc.Inventors: Yu-Chi Lai, Sheng-Fa Chi
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Patent number: 7550951Abstract: A two-step charger includes an AC/DC power supply, a transformer, a compensator, a controller, a comparator and an isolating controller. The comparator detects whether a battery is connected to the transformer. If so, a command voltage of the charger is set at a high level. Since the battery voltage is lower than the command voltage, the controller orders the compensator to send out a compensating current. The current entering the primary side of the transformer is increased to promote the output current from the secondary side of the transformer. Once the comparator detects that the battery reaches as high as the charger, the command voltage is adjusted to a low level. The controller orders the compensator to stop outputting the compensating current. Therefore, a larger current can speed up battery charging. Once the battery is fully charged, the charging voltage is lowered to avoid high temperature.Type: GrantFiled: October 3, 2006Date of Patent: June 23, 2009Assignee: Asian Power Devices Inc.Inventors: Yu-Chi Lai, Ji-Shun Liao
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Patent number: 7232558Abstract: Solid, shaped and fired fibers of Ti4O7 and Ti5O9 are made by firing TiO2 fibers in a reducing atmosphere. In a first aspect, the TiO2 fibers are made by extruding into air a viscous TiO2 gel and heat treating the resulting green fibers to remove solvent, decompose and to volatilize undesired constituents to form electrically conductive, refractory fibers of Ti4O7 and Ti5O9. In a second aspect, solid, shaped and fired fibers of Ti4O7 and Ti5O9 are made by firing extruded fibers from mixtures of TiO2.Type: GrantFiled: January 9, 2004Date of Patent: June 19, 2007Assignee: Advanced Power Devices, Inc.Inventors: Richard E. Tressler, James H. Adair, David L. Shelleman, Julie M. Anderson
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Patent number: 6652705Abstract: An improved, more durable heat conductive composition for transferring heat from a heat-dissipating component to a heat dissipater and method of producing the same. The composition preferably comprises a base consisting of paraffin having particles of graphite suspended therein. In the preferred embodiment, the composition further includes a polymer to increase durability. The composition is formulated to be solid in the range of normal room temperatures, but liquify once subjected to temperatures just below the range at which heat generating electronic semi conductor devices typically operate. The present invention further comprises processes for transferring heat from a heat-dissipating component to a heat dissipater, which comprises applying the heat conductive composition to an interface between a heat-dissipating component and a heat sink.Type: GrantFiled: May 18, 2000Date of Patent: November 25, 2003Assignee: Power Devices, Inc.Inventors: Raymond G. Freuler, Gary E. Flynn, Robert A. Rauch
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Patent number: 6624030Abstract: A vertical semiconductor rectifier device includes a semiconductor substrate of first conductivity type and having a plurality of gates insulatively formed on a first major surface and a plurality of source/drain regions of the first conductivity type formed in surface regions of second conductivity type in the first major surface adjacent to the gates. A plurality of channels of the second conductivity type each abuts a source/drain region and extends under a gate, each channel being laterally graded with a sloped P-N junction separating the channel region from the substrate of first conductivity type. In fabricating the vertical semiconductor rectifier device, a partial ion mask is formed on the surface of the semiconductor with the mask having a sloped surface which varies the path length of ions through the mask to form laterally-graded channel regions.Type: GrantFiled: December 19, 2000Date of Patent: September 23, 2003Assignee: Advanced Power Devices, Inc.Inventors: Paul Chang, Geeng-Chuan Chern, Wayne Y. W. Hsueh, Vladimir Rodov, Charles Lin
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Patent number: 6451485Abstract: The performance of electrochemical energy devices such as batteries, fuel cells, capacitors and sensors is enhanced by the use of electrically conducting ceramic materials in the form of fibers, powder, chips and substrates.Type: GrantFiled: June 12, 1998Date of Patent: September 17, 2002Assignee: Advanced Power Devices, Inc.Inventors: David James, Daniel B. Allison, II, John J. Kelley, James B. Doe
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Patent number: 6377157Abstract: A coil element with no solder joints is made of a continuous conductive strip includes a first terminal, a second terminal, a conductive path between the first terminal and the second terminal. The conductive path has curved regions and foldable hinge regions shaped such that the coil element may be folded into single or multi-turn coils for use in transformers and other electronic devices.Type: GrantFiled: August 17, 2000Date of Patent: April 23, 2002Assignee: International Power Devices, Inc.Inventors: Hanson Liu, Pi-Yao Aileen Liu
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Patent number: 6331455Abstract: A power rectifier having low on resistance, mass recovery times and low forward voltage drop. In a preferred embodiment, the present invention provides a power rectifier device employing a vertical device structure, i.e., with current flow between the major surfaces of the discrete device. The device employs a large number of parallel connected cells, each comprising a MOSFET structure with a gate to drain short via a common metallization. This provides a low Vf path through the channel regions of the MOSFET cells to the source region on the other side of the integrated circuit. A thin gate structure is formed annularly around the pedestal regions on the upper surface of the device and a precisely controlled body implant defines the channel region and allows controllable device characteristics, including gate threshold voltage and Vf. A parallel Schottky diode is also provided which increases the switching speed of the MOSFET cells.Type: GrantFiled: April 1, 1999Date of Patent: December 18, 2001Assignee: Advanced Power Devices, Inc.Inventors: Vladimir Rodov, Wayne Y. W. Hsueh, Paul Chang, Michael Chern
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Patent number: D647476Type: GrantFiled: May 26, 2011Date of Patent: October 25, 2011Assignee: Asian Power Devices Inc.Inventor: Chuei-Hang Ciou
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Patent number: D697029Type: GrantFiled: July 15, 2013Date of Patent: January 7, 2014Assignee: Asian Power Devices, Inc.Inventor: Chui-Hsing Chiu
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Patent number: D721038Type: GrantFiled: April 23, 2014Date of Patent: January 13, 2015Assignee: Asian Power Devices, Inc.Inventor: Chui-Hsing Chiu