Patents Examined by Adolf D. Berhane
  • Patent number: 10454386
    Abstract: A plurality of semiconductor elements and a control circuit unit are provided. The plurality of semiconductor elements which are connected in parallel are configured to perform switching at the same time. The control circuit unit includes a drive circuit connected to the plurality of semiconductor elements which perform operation at the same time, control wirings and reference wirings. The control wirings connect control electrodes of the semiconductor elements to the drive circuit. The reference wirings connect reference electrodes of the semiconductor elements to the drive circuit. A parasitic inductance in the reference wiring is made smaller than a parasitic inductance in the control wiring.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: October 22, 2019
    Assignee: DENSO CORPORATION
    Inventors: Tomoya Miura, Yuu Yamahira, Kazuma Fukushima
  • Patent number: 10454375
    Abstract: A power converter may include a first and second housings, each of which houses switching elements connected in parallel. Each of the first and the second housings may be provided with a first surface and a second surface. The first and the second housings may be arranged face to face. In each of the first and the second housings, the switching elements may be aligned in an alignment direction which is parallel to both of the first and the second surfaces. An emitter terminal or a source terminal of parallel connection of the switching elements may extend from the second surface at a position equidistant from the switching elements positioned at both ends in the alignment direction among the plurality of switching elements. A collector terminal or a drain terminal of the parallel connection may be positioned adjacent to the emitter or the source terminal in the alignment direction.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: October 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Jojima, Shuichi Iwata, Hiromi Yamasaki, Takanori Kawashima
  • Patent number: 10451687
    Abstract: A power converter is provided with a power semiconductor module having a switching element. The power converter includes a gate drive circuit, a first detection unit, a second detection unit, a time measuring unit, and an abnormality diagnostic unit. The gate drive circuit drives the switching element and outputs a feedback signal based on a switching operation of the switching element. The first detection unit detects a change in a feedback signal of an upper arm of the power converter. The second detection unit detects a change in a feedback signal of a lower arm of the power converter. The time measuring unit measures a difference between detection timings of a signal change by the first detection unit and a signal change by the second detection unit. The abnormality diagnostic unit performs diagnosis of the power converter based on a measurement result by the time measuring unit.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: October 22, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Kazuki Tani, Yoshinobu Kimura, Takashi Ogawa
  • Patent number: 10452088
    Abstract: A source driver and an operation method thereof are provided. The source driver includes an output buffer, a feedback switch, and a feedback voltage generating circuit. The output buffer receives the input voltage and produces an output voltage. The first terminal and the second terminal of the feedback switch are respectively coupled to the input terminal and the output terminal of the output buffer. During an overdrive period, the feedback switch is turned off, and the feedback voltage generating circuit outputs a feedback voltage to the output buffer. The feedback voltage is lower than the output voltage when the input voltage is in a rising mode. The feedback voltage is higher than the output voltage when the input voltage is in a falling mode. During a normal driving period, the feedback switch is turned on, and the feedback voltage generating circuit does not output the feedback voltage.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 22, 2019
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Chia-Chu Chien
  • Patent number: 10447164
    Abstract: An object of the present invention is to provide a power supply voltage stabilizing method that can suppress the performance of a switching power supply from being deteriorated even when a battery voltage varies and/or load conditions change. In a power supply voltage stabilizing method of a switching power supply including an output power MOS to which a battery voltage is supplied and a PWM feedback control unit that controls the output power MOS, the PWM feedback control unit includes a voltage feedback controller that controls on the basis of a power supply voltage output from the switching power supply and a current feedback controller that controls on the basis of a current output from the switching power supply. A variation in the battery voltage and/or a change in the load condition of the switching power supply are/is detected, and the bandwidth of the PWM feedback control unit is dynamically changed in accordance with the result of the detection.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: October 15, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Masayuki Ida
  • Patent number: 10447173
    Abstract: A single-phase five-level active clamping converter unit and a converter. The single-phase five-level active clamping converter unit has three input ends and one output end, and also comprises: a suspension capacitor and a topological control portion. The topological control portion is connected to the suspension capacitor and the three input ends and one output end of the single-phase five-level active clamping converter unit, is connected to a plurality of control ends, and is suitable for the supply of at least eight operating modes under the control of a control signal accessing the control ends. In the single-phase five-level active clamping converter unit, a topological structure is easy to design, and is simple and convenient to control.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: October 15, 2019
    Inventors: Hongliang Wang, Yan-Fei Liu
  • Patent number: 10447167
    Abstract: In a method of DC voltage—pulse voltage conversion, DC voltage is provided; a succession of controlling square pulses having adjustable pulse ratio is generated; an inductive load is periodically connected to outputs of a source of the DC voltage using the succession of the controlling square pulses; pulse current flowing through the inductive load is generated; a predefined value of resistance of an electronically-controlled resistor included in a circuit of the pulse current flowing through the inductive load is formed, and the pulse current is adjusted by the electronically-controlled resistor, whereby adjusting the level of pulse electromagnetic noise radiated to the environment is achieved.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: October 15, 2019
    Assignee: Drive CJSC
    Inventors: Yuriy I. Romanov, Stanislav V. Maletskiy
  • Patent number: 10447027
    Abstract: The present embodiments relate to methods and apparatuses for providing fault protection in a power controller such as a voltage regulator, and particularly protection against reverse over current fault conditions. Some embodiments are capable of distinguishing between different types of reverse over current conditions, such as a high-side short or a normal over voltage condition. In these and other embodiments, fault protection is performed in favor of a load connected to the voltage regulator, rather than components of the voltage regulator itself.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: October 15, 2019
    Assignee: Intersil Americas LLC
    Inventors: Chun Cheung, Mir Mahin, Paul Dackow
  • Patent number: 10439487
    Abstract: Converter devices and methods are disclosed. A supply voltage (Vcc), for example to supply a control circuit (11) controlling a switch (Q1), is generated using an additional current path (16) and a snubber circuit (12).
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 8, 2019
    Assignee: Infineon Technologies Austria AG
    Inventors: Yi-Chou Hsiao, Chia Jui Chang, Jin Hung Lin
  • Patent number: 10438736
    Abstract: A magnetic component and a manufacturing method thereof are provided. The magnetic component includes a magnetic core, a first winding set and a second winding set. The magnetic core is made of a magnetic powder material and includes two connecting portions connected through three magnetic columns to form a first side and a second side opposite to each other. The first winding set and the second winding set are made by a flat conductive body, and spaced apart on the middle magnetic column at a distance. The first winding set includes two first conducting portions connected through a first horizontal portion. The second winding set includes two second conducting portions connected through a second horizontal portion. The first horizontal portion and the second horizontal portion are exposed to the first side, and the two first conducting portions and the two second conducting portions are extended to the second side.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 8, 2019
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jinping Zhou, Zhangnan Xin, Pengkai Ji, Yi-Min Hsieh
  • Patent number: 10439385
    Abstract: A biomedical stimulation protection device includes a current source, a first upper P-channel metal oxide semiconductor field effect transistor (PMOSFET), a first adaptive bias circuit, and six first stimulating metal oxide semiconductor field effect transistors (MOSFETs). The first adaptive bias circuit receives a power voltage (VDD), a double power voltage (2VDD), and a triple power voltage (3VDD). The first upper MOSFET and the first stimulating MOSFETs are electrically cascoded with each other. The first adaptive bias circuit turns on at least one of the first stimulating MOSFETs according to VDD, 2VDD, and 3VDD, so as to stimulate a physiological tissue and control a voltage difference between two terminals of each of the first upper MOSFET and the first stimulating MOSFETs to be lower than or equal to VDD.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 8, 2019
    Assignee: National Chiao Tung University
    Inventors: Chung-Yu Wu, Chi-Wei Huang, Cheng-Hsiang Cheng
  • Patent number: 10429879
    Abstract: An embodiment for bandgap reference voltage circuitry includes: a bandgap reference voltage generator including: a first bipolar junction transistor (BJT); a first amplifier having a non-inverting input coupled to a collector of the first BJT and a first output node configured to provide a bandgap reference voltage; a first resistor coupled between a base of the first BJT and the first output node; a second BJT; a second amplifier having a non-inverting input coupled to a collector of the second BJT and a second output node coupled to a junction node; a second resistor coupled between a base of the second BJT and the junction node; and a third resistor coupled between the base of the first BJT and the junction node.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: October 1, 2019
    Assignee: NXP USA, Inc.
    Inventor: Ricardo Pureza Coimbra
  • Patent number: 10432086
    Abstract: Bridgeless PFC converters. At least some example embodiments are methods of operating a power converter, including operating the power converter during a positive half-line cycle of a frequency of an alternating current (AC) source by: charging a primary winding of a multi-winding boost inductor with a charging current having a first polarity; and then discharging the primary winding; sensing a falling edge of a voltage at a switch node by way of a secondary winding of the multi-winding boost inductor; and triggering a subsequent charging of the primary winding during the positive half-line cycle based on the falling edge. Operating the power converter during a negative half-line cycle of the line frequency by: sensing a rising edge of the voltage at the switch node by way of the secondary winding; and triggering a subsequent charging of the primary winding.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: October 1, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Nikhilesh S. Kamath
  • Patent number: 10432093
    Abstract: A multiphase DC-DC converter includes a first phase circuit including a higher inductance inductor and a second phase circuit including a lower inductance inductor. An output of the inductors are tied together providing a Vout. A phase manager and current sharing (PMCS) block receives a feedback signal from a feedback network coupled between Vout and the PMCS block that receives current feedback from phase circuits. The PMCS block generates driver control signals at a first time when a load is requesting a lower load current for controlling the phase circuits to operate with a first current sharing ratio to provide the lower load current, and at a second time when the load is requesting a higher load current controls the phase circuits to operate at a second current sharing ratio that is different from the first current sharing ratio having a higher average second phase circuit current.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: October 1, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Kuang-Yao Cheng, Wenkai Wu, Yipeng Su
  • Patent number: 10432090
    Abstract: There is provided a reference voltage generator for providing an adaptive voltage. The reference voltage generator includes a steady current source and a PMOS transistor and an NMOS transistor cascaded to each other. A reference voltage provided by the reference voltage generator is determined by gate-source voltages of the PMOS transistor and the NMOS transistor. As said gate-source voltages vary with the temperature and manufacturing process, the reference voltage forms a self-adaptive voltage.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: October 1, 2019
    Assignee: AUDIOWISE TECHNOLOGY INC.
    Inventor: Lien-Sheng Wei
  • Patent number: 10432106
    Abstract: A power conversion device includes a printed wiring board on which an alternating-current power-supply input part, a converter circuit part to convert alternating-current power to direct-current power, an inverter circuit part to convert direct-current power converted by the converter circuit part to alternating-current power, an alternating-current power-supply output part to output alternating-current power converted by the inverter circuit part, and a conductive pattern to electrically connect the alternating-current power-supply input part, the converter circuit part, the inverter circuit part, and the alternating-current power-supply output part to one another are provided, and a busbar that has a plate-like shape with a plane direction thereof perpendicular to a plane direction of the printed wiring board, is arranged to overlap the conductive pattern in plan view, and includes two or more connecting portions that are in contact with the conductive pattern.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventor: Shinya Matsushita
  • Patent number: 10432095
    Abstract: A controller for a power converter includes a switching control coupled to switch a power switch to regulate an output of the power converter. A sensor is coupled to receive a signal from a terminal of the controller that represents a line input voltage during at least a portion of an on time of the power switch, and an output voltage of the power converter during at least a portion of an off time of the power switch. The sensor is coupled to sample the signal from the terminal during the portion of the on time of the power switch and to generate a sample input line voltage signal. An output regulator is coupled between the sensor and the switching control to output an output regulation signal to the switching control. The switching control is coupled to switch the power switch in response to the output regulation signal.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: October 1, 2019
    Assignee: Power Integrations, Inc.
    Inventors: Alex B. Djenguerian, Balu Balakrishnan
  • Patent number: 10431984
    Abstract: The invention relates to a system for generating electric power, comprising: an alternator (1) for coupling with a drive system (7), supplying an AC voltage to an output bus (10); a reversible AC/DC converter (2) in which the AC bus (6) is connected to the output bus (10) of the alternator (1); an electricity-storage element (3) connected to the DC bus (9) of the converter (2); a controller (4) arranged to react to a transient state of load-shedding or charging impact by controlling the converter (2) so as to collect energy on the output bus (10) of the alternator (2) and to store same in the storage element (3) in the case of load-shedding, and to collect energy in the storage element (3) and to inject same into the output bus (10) in the case of charging impact, the converter (2) being controlled so as to inject currents to compensate for harmonic currents into the AC bus (10) of the alternator (1).
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 1, 2019
    Assignees: MOTEURS LEROY-SOMER, UNIVERSITE DE POITIERS
    Inventors: Emile Mouni, Philippe Manfe, Faycal Bensmaine, Slim Tnani, Gerard Champenois
  • Patent number: 10432127
    Abstract: A cargo handling system is disclosed. In various embodiments, the cargo handling system includes a direct current power bus; a motor connected to the direct current power bus and having a flux reference input; a unit controller connected to the motor and configured to detect a level of regenerative energy on the direct current power bus and to alter the flux reference input in response to the level of regenerative energy.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 1, 2019
    Assignee: GOODRICH CORPORATION
    Inventor: Scott Harms
  • Patent number: 10432082
    Abstract: An electrical power input adapter coupled to a direct current (DC) bus in a power distribution system receives either an alternating current (AC) power signal or a DC power signal at a first voltage level to transmit to the DC bus. An electrical converter receives and converts the received signal to a DC power signal at a second fixed voltage. A second interface includes a current limiter to receive and limit an amperage of the DC power signal at the second voltage. A programmable switch coupled to the current limiter receives the DC power signal at the second voltage and at the limited amperage and transmits the DC power signal at the second voltage and at the limited amperage. A controller coupled to the programmable switch controls when, within a period of time, the programmable switch is to transmit the DC power signal at the second voltage and at the limited amperage.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: October 1, 2019
    Assignee: Katerra, Inc.
    Inventors: Bahman Sharifipour, Jumie Yuventi, Mark Thomas