Patents Assigned to Lambda Corporation
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Patent number: 11650380Abstract: The present disclosure provides embodiments of fiber optic cable connectors, sleeves for fiber optic cable connectors, fiber optic cable adapters and fiber optic connector assemblies that incorporate intelligent systems that can identify presence and exchange information.Type: GrantFiled: July 19, 2018Date of Patent: May 16, 2023Assignee: Green Lambda CorporationInventors: Mohammad H. Raza, Boby Joseph, Andrew J. Martin, Robert C. O'Neil
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Patent number: 10218265Abstract: A multi-level voltage regulator system/method providing discrete regulation of a DC-DC intermediate bus converter (IBC) output voltage (Vout) is disclosed. The disclosed system/method allows IBC Vout to be regulated in discrete steps during periods where IBC input voltage (Vin) falls below nominal operating values. Rather than shutting down or degrading IBC Vout in an unpredictable non-linear fashion based on IBC input/loading, IBC Vout is regulated in fixed discrete steps, allowing IBC-connected point-of-load (POL) converters to obtain stable power input that is well-defined over IBC Vin. IBC operating parameters may define multi-dimensional operational state spaces of IBC Vout regulation that ensure optimum power flow to attached POLs while maintaining operational stability within the IBC regulator. Instabilities in IBC/POL performance across variations in IBC Vin, load transients, POL loading, and environmental variables may be prevented using Vin voltage step hysteresis.Type: GrantFiled: November 8, 2016Date of Patent: February 26, 2019Assignee: TDK-LAMBDA CORPORATIONInventors: Jin He, Jeffrey John Boylan
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Publication number: 20170063220Abstract: A multi-level voltage regulator system/method providing discrete regulation of a DC-DC intermediate bus converter (IBC) output voltage (Vout) is disclosed. The disclosed system/method allows IBC Vout to be regulated in discrete steps during periods where IBC input voltage (Vin) falls below nominal operating values. Rather than shutting down or degrading IBC Vout in an unpredictable non-linear fashion based on IBC input/loading, IBC Vout is regulated in fixed discrete steps, allowing IBC-connected point-of-load (POL) converters to obtain stable power input that is well-defined over IBC Vin. IBC operating parameters may define multi-dimensional operational state spaces of IBC Vout regulation that ensure optimum power flow to attached POLs while maintaining operational stability within the IBC regulator. Instabilities in IBC /POL performance across variations in IBC Vin, load transients, POL loading, and environmental variables may be prevented using Vin voltage step hysteresis.Type: ApplicationFiled: November 8, 2016Publication date: March 2, 2017Applicant: TDK-Lambda CorporationInventors: Jin HE, Jeffrey John Boylan
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Patent number: 9520772Abstract: A multi-level voltage regulator system/method providing discrete regulation of a DC-DC intermediate bus converter (IBC) output voltage (Vout) is disclosed. The disclosed system/method allows IBC Vout to be regulated in discrete steps during periods where IBC input voltage (Vin) falls below nominal operating values. Rather than shutting down or degrading IBC Vout in an unpredictable non-linear fashion based on IBC input/loading, IBC Vout is regulated in fixed discrete steps, allowing IBC-connected point-of-load (POL) converters to obtain stable power input that is well-defined over IBC Vin. IBC operating parameters may define multi-dimensional operational state spaces of IBC Vout regulation that ensure optimum power flow to attached POLs while maintaining operational stability within the IBC regulator. Instabilities in IBC/POL performance across variations in IBC Vin, load transients, POL loading, and environmental variables may be prevented using Vin voltage step hysteresis.Type: GrantFiled: August 16, 2013Date of Patent: December 13, 2016Assignee: TDK-LAMBDA CORPORATIONInventors: Jin He, Jeffrey John Boylan
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Patent number: 9408327Abstract: A thermal management system/method allowing efficient electrical/thermal attachment of heat sourcing PCBs to heat sinking PCBs using reflow/wave/hand soldering is disclosed. The disclosed system/method may incorporate a combination of support pins, spacer pads, and/or contact paste that mechanically attaches a heat sourcing PCB (and its associated components) to a heat sinking PCB such that thermal conductivity between the two PCBs can be optimized while simultaneously allowing controlled electrical conductivity between the two PCBs. Controlled electrical isolation between the two PCBs is provided for using spacer pads that may also be thermally conductive. Contact paste incorporated in some embodiments permits enhanced conductivity paths between the heat sourcing PCB, a thermally conductive plate mounted over the heat sourcing PCB, and the heat sinking PCB. The use of self-centering support pins incorporating out-gassing vents in some embodiments allows reflow/wave/hand soldering as desired.Type: GrantFiled: July 15, 2015Date of Patent: August 2, 2016Assignee: TDK-LAMBDA CORPORATIONInventors: L. Ray Albrecht, III, Gordon K. Y. Lee, Jin He
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Publication number: 20150319886Abstract: A thermal management system/method allowing efficient electrical/thermal attachment of heat sourcing PCBs to heat sinking PCBs using reflow/wave/hand soldering is disclosed. The disclosed system/method may incorporate a combination of support pins, spacer pads, and/or contact paste that mechanically attaches a heat sourcing PCB (and its associated components) to a heat sinking PCB such that thermal conductivity between the two PCBs can be optimized while simultaneously allowing controlled electrical conductivity between the two PCBs. Controlled electrical isolation between the two PCBs is provided for using spacer pads that may also be thermally conductive. Contact paste incorporated in some embodiments permits enhanced conductivity paths between the heat sourcing PCB, a thermally conductive plate mounted over the heat sourcing PCB, and the heat sinking PCB. The use of self-centering support pins incorporating out-gassing vents in some embodiments allows reflow/wave/hand soldering as desired.Type: ApplicationFiled: July 15, 2015Publication date: November 5, 2015Applicant: TDK-LAMBDA CORPORATIONInventors: L. Ray Albrecht, III, Gordon K.Y. Lee, Jin He
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Patent number: 9143047Abstract: The improved DC-DC converter apparatus includes a primary side circuit and a secondary side circuit that is galvanically isolated from the primary. The primary side induces a voltage in the secondary side that provides an output voltage for driving POLs. A flux-control device measures the transformer primary side flux to control the primary side duty cycle, thereby loosely regulating the output voltage of the secondary side circuit.Type: GrantFiled: November 9, 2011Date of Patent: September 22, 2015Assignee: TDK-LAMBDA CORPORATIONInventor: Carl Wildrick
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Patent number: 9119327Abstract: A thermal management system/method allowing efficient electrical/thermal attachment of heat sourcing PCBs to heat sinking PCBs using reflow/wave/hand soldering is disclosed. The disclosed system/method may incorporate a combination of support pins, spacer pads, and/or contact paste that mechanically attaches a heat sourcing PCB (and its associated components) to a heat sinking PCB such that thermal conductivity between the two PCBs can be optimized while simultaneously allowing controlled electrical conductivity between the two PCBs. Controlled electrical isolation between the two PCBs is provided for using spacer pads that may also be thermal conductive. Contact paste incorporated in some embodiments permits enhanced conductivity paths between the heat sourcing PCB, a thermally conductive plate mounted over the heat sourcing PCB, and the heat sinking PCB. The use of self-centering support pins incorporating out-gassing vents in some embodiments allows reflow/wave/hand soldering as desired.Type: GrantFiled: October 24, 2012Date of Patent: August 25, 2015Assignee: TDK-LAMBDA CORPORATIONInventors: L. Ray Albrecht, III, Gordon K. Y. Lee, Jin He
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Patent number: 8934267Abstract: The improved DC-DC converter apparatus includes a primary side circuit and a secondary side circuit that is galvanically isolated from the primary. The primary side induces a voltage in the secondary side that provides an output voltage for driving POLs. A controller in the primary senses a reflected output voltage signal that is coupled from the secondary and is proportional to the secondary output voltage with respect to a voltage regulation point determined by either a voltage divider circuit or the zener voltage in the secondary. The voltage regulation point is established by wide-tolerance electrical components, such as a zener diode, a resistor, or a combination, connected in the coupling device circuit.Type: GrantFiled: March 24, 2011Date of Patent: January 13, 2015Assignee: TDK-Lambda CorporationInventors: Jin He, Jeffrey Boylan, Carl Wildrick
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Patent number: 8929098Abstract: A controller controls a voltage-source power converter and a current-source power converter based on a detection value of a rail voltage input to the voltage-source power converter and a detection value of a charging voltage output from the current-source power converter, at the time of charging operation.Type: GrantFiled: June 13, 2011Date of Patent: January 6, 2015Assignee: TDK-Lambda CorporationInventor: Eiji Takegami
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Patent number: 8842446Abstract: A controller controls a voltage-source power converter and a current-source power converter based on a detection value of a rail voltage input to the voltage-source power converter and a detection value of a charging voltage output from the current-source power converter, at the time of charging operation.Type: GrantFiled: June 13, 2011Date of Patent: September 23, 2014Assignee: TDK-Lambda CorporationInventor: Eiji Takegami
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Patent number: 8766546Abstract: An LED drive device whose power dissipation can be effectively reduced without halting current supply to an LED row as well as an LED illuminating device with the LED drive device incorporated therein. When an LED 21A making up an LED row 3A has developed a short-circuit fault, a voltage corresponding to a forward voltage which has been applied to the faulty LED 21A is impressed additionally to an FET 31A for electric power consumption thereof to increase to not less than a certain value. At this time, a power limiting circuit 6A varies a potential, being a reference value of a constant current circuit 7A, at a connecting point between voltage dividing resistors 46A, 47A and then continues to supply a certain level of a current IF1 to the LED row 3A so as to keep the remaining fault-free LEDs 22A to 26A lighting. Consequently, in the event of a short-circuit fault of the LED 21A, the adverse effect caused by discontinuing the current supply to the LED row 3A can be swept away.Type: GrantFiled: June 6, 2011Date of Patent: July 1, 2014Assignee: TDK-Lambda CorporationInventor: Kazunori Oshima
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Patent number: 8604770Abstract: A load drive device capable of expanding a range of an output power by improving a linearity thereof when the output power varies.Type: GrantFiled: June 23, 2011Date of Patent: December 10, 2013Assignee: TDK-Lambda CorporationInventor: Kazunori Oshima
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Patent number: 8604797Abstract: A number of cells can be determined before control for a battery without providing cell number setting and input means. The cell number determination device comprises voltage measuring units that select an “i”th cell among cells that are connected in series and that configure a battery, and that measure a voltage value between a terminal in which the “i”th cell and an (i?1)th cell, which is in one location higher than the “i”th cell, are connected and a ground potential line, voltage comparators that determine an existence, nonexistence or normality of the cells by comparing a voltage value of an (i+1)th cell that is in one location lower than the “i”th cell with the voltage value of the “i”th cell measured by the voltage measuring units and a cell number determination unit that determines a number of assembled cells and normal cells and cell assembled locations in the battery.Type: GrantFiled: March 25, 2010Date of Patent: December 10, 2013Assignees: TDK-Lambda Corporation, TDK CorporationInventors: Tadao Senriuchi, Masahiko Hirokawa, Takumi Sakamoto, Hiroshi Nakazawa, Noriyuki Hirao
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Patent number: 8576582Abstract: A DC-DC converter includes a current-source power converter that converts direct current into alternating current; a transformer that transforms the voltage of the alternating current output from the current-source power converter; a rectifier that converts the alternating current the voltage of which has been transformed by the transformer, into direct current; and a capacitor that is connected in series with winding of the transformer on the rectifier side, and blocks a direct-current component from being applied to the transformer.Type: GrantFiled: June 13, 2011Date of Patent: November 5, 2013Assignee: TDK-Lambda CorporationInventor: Kazuki Iwaya
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Patent number: 8531841Abstract: The present invention provides a non-intrusive method for dissipating heat from open-frame DC-DC power converters where bottom side components are exposed. A thermal interface material is placed between the motherboard to which the power converter is soldered and power dissipating and temperature sensitive components on the bottom of the power converter. The thermal interface material fills the gap between the power converter components and the motherboard, thereby providing a heat conductive path for dissipating heat from the power converter to the motherboard.Type: GrantFiled: October 26, 2010Date of Patent: September 10, 2013Assignee: TDK-Lambda CorporationInventor: Gordon K. Y. Lee
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Patent number: 8513903Abstract: A discharge lamp lighting device capable of preventing magnetic saturation of an inductor connected with an output of an inverter. An inverter 12 comprises a first set of switching elements 32, 33 for switching an output voltage of the inverter 12 to a positive polarity and a second set of switching elements 31, 34 for switching the output voltage thereof to a negative polarity. At the start-up of a lamp 20, each of the switching elements 31 to 34 is allowed to perform switching operations in such a pattern that after turning on and off the first set of the switching elements 32, 33 more than once, the second set of switching elements 31, 34 are allowed to turn or and off more than once. Accordingly, energy stored in the inductor 37 is discharged during a temporary off-period, thus permitting the inductor 37 to be prevented from being magnetically saturated.Type: GrantFiled: January 28, 2011Date of Patent: August 20, 2013Assignees: TDK-Lambda Corporation, Seiko Epson CorporationInventors: Takumi Horikawa, Kikuro Sasayama, Kenichi Kitagawa
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Patent number: 8461807Abstract: A reusable period of a battery can be maintained for a long time by recharging while avoiding abnormal heating of the battery due to over discharge. A battery protection circuit comprises a control part that cuts off a discharge switch which is a discharge path to a load for a battery when a voltage value of the battery is equal to or less than a first threshold value, or when the voltage value of the battery is less than the first threshold value, wherein the control part cuts off a power switch as a power supply path to the control part itself when the voltage value of the battery is equal to or less than a second threshold value, or when the voltage value of the battery is less than the second threshold value which is lower than the first threshold value.Type: GrantFiled: March 25, 2010Date of Patent: June 11, 2013Assignees: TDK-Lambda Corporation, TDK CorporationInventors: Tadao Senriuchi, Masahiko Hirokawa, Takumi Sakamoto, Hiroshi Nakazawa, Noriyuki Hirao
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Patent number: 8369056Abstract: A power supply control device for controlling power supply to a pair of terminals to which a load is connected, comprising a voltage measuring part for measuring a voltage which has a predetermined relationship with the voltage of the pair of terminals, a short circuit detecting part for detecting whether a short circuit exists between the pair of terminals based on the measured voltage and for making power supply to the pair of terminals stop when existence of a short circuit is detected, and a constant current supplying part for supplying a constant current though the pair of terminals; wherein the short circuit detecting part is configured to detect that the previously detected short circuit is eliminated when the voltage measured by the voltage measuring part is equal to or greater than a predetermined threshold value upon supplying the constant current through the pair of terminals.Type: GrantFiled: March 25, 2010Date of Patent: February 5, 2013Assignees: TDK-Lambda Corporation, TDK CorporationInventors: Tadao Senriuchi, Masahiko Hirokawa, Takumi Sakamoto, Hiroshi Nakazawa, Noriyuki Hirao
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Patent number: 8344762Abstract: A primary circuit turns on switching elements and generates energy from a direct-current power supply to a secondary circuit through a transformer. The secondary circuit charges a driven element using the energy obtained from the primary circuit through the transformer, turns on a switching element, discharges the energy accumulated in the driven element, and generates the energy in the primary circuit through the transformer. The primary circuit returns the energy obtained from the secondary circuit to the direct-current power supply.Type: GrantFiled: December 22, 2009Date of Patent: January 1, 2013Assignee: TDK-Lambda CorporationInventor: Hiroto Terashi