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33results about How to "Current detection" patented technology
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Motor control device and motor control method
InactiveUS7183737B2Improve accuracyCurrent detectionAC motor controlElectric motor controlDriving currentControl signal
A motor control device selectively turns on or off a drive transistor in-accordance with a PWM control signal Sp, such that a drive current Im supplied to a motor is adjusted. The device also samples and holds a motor current Sm for obtaining a motor current value Ih. With reference to the motor current value Ih, the device protects the motor from an overcurrent. Sampling and holding of the motor current Sm is performed for a sampling and holding time Ts. The sampling and holding time Ts corresponds to a time period between a first point in time when the level of the PWM control signal Sp is switched for turning off the drive transistor and a second point in time that precedes the first point in time by a predetermined period. As a result, the motor current value Ih is detected with high accuracy.
Owner:ASMO CO LTD
Switching power supply
InactiveUS7385380B2Highly precise and high speed current controlCurrent detectionDc-dc conversionPulse techniqueAudio power amplifierEngineering
In a switching power supply apparatus for performing a switching control of a power MOS transistor that flows current to a coil and converting input voltage into output voltage, even if there occurs offset voltage in a current sensing operational amplifier, source potential of a current sensing MOS transistor is precisely kept at source potential of a low side power MOS transistor. For example, an offset cancel capacitor is arranged at an inverting input terminal of the current sensing operational amplifier, and voltage in the direction to offset the offset voltage occurring in the operational amplifier is charged to this capacitor.
Owner:RENESAS ELECTRONICS CORP
Current sensor
InactiveUS20080030208A1Low costImprove reliabilityCurrent/voltage measurementResistance/reactance/impedenceBusbarCurrent sensor
A current sensor includes a busbar, a case, a connector, and a bare chip having a current detection circuit. The busbar has a crimp terminal at one end, a ring terminal at the other end, and a shunt resistor welded between the crimp and ring terminals. The shunt resistor is encapsulated in the case, and the busbar has an electrode exposed to a sealed inner room of the case. The connector has a connector body unitary with the case and has a connector terminal that is exposed to the inner room at one end and exposed to an outside of the connector body at the other end. The bare chip is arranged in the inner room of the case and wire-bonded to each of the busbar and the connector terminal.
Owner:DENSO CORP
Unmanned helicopter
InactiveUS20090069957A1Current detectionReduce impactAircraft componentsUnmanned aerial vehiclesFlight dataEngineering
GPS devices (GPS receivers and corresponding GPS antennas) for detecting a location of an airframe are provided. An autonomous control section (e.g., an autonomous control box) including a data communication device for communicating with the ground and a control board having a built-in control program is provided. An unmanned helicopter flies depending on airframe data such as an attitude and a speed of the airframe, engine speed, and a throttle angle and flight data such as a location and a direction of the airframe. The autonomous control section is provided with a plurality of different type of GPS devices.
Owner:YAMAHA MOTOR CO LTD
Current sensor
InactiveUS7573274B2Low costImprove reliabilityMeasurement using dc-ac conversionResistance/reactance/impedenceBusbarCurrent sensor
A current sensor includes a busbar, a case, a connector, and a bare chip having a current detection circuit. The busbar has a crimp terminal at one end, a ring terminal at the other end, and a shunt resistor welded between the crimp and ring terminals. The shunt resistor is encapsulated in the case, and the busbar has an electrode exposed to a sealed inner room of the case. The connector has a connector body unitary with the case and has a connector terminal that is exposed to the inner room at one end and exposed to an outside of the connector body at the other end. The bare chip is arranged in the inner room of the case and wire-bonded to each of the busbar and the connector terminal.
Owner:DENSO CORP
Rechargeable motor-driven ratchet wrench having power-off protection
A rechargeable motor-driven ratchet wrench having power-off protection of the present invention includes a motor, a rechargeable battery and a power-off protection device. When the loaded current of the motor exceeds a set default value of a reference circuit, the power-off protection device disconnects the power supply of the rechargeable battery, so as to stop the motor operation. With the circuit design of the power-off protection device, the ratchet wrench can be ensured to provide usage safety and also usage lifespan of the ratchet wrench can be extended.
Owner:TECHWAY INDAL
Method of checking earphone wearing state
ActiveUS20140093088A1Easy to detectCurrent detectionPosition data use in hearing devicesHeadphones for stereophonic communicationInformation processingHeadphones
An information processing apparatus that detects an output from a 3-axis acceleration sensor included in an earphone unit worn by a user while the user is in a still state; monitors the output of the 3-axis acceleration sensor while a nodding gesture is performed by the user; detects a time when an angle of the nodding gesture reaches a maximum; and determines an earphone wearing state based on the output from the 3-axis acceleration sensor in the still state and the output from the 3-axis acceleration sensor at the time of detecting the maximum nodding angle.
Owner:SONY CORP
Power factor correction (PFC) controller and bridgeless pfc circuit with the same
InactiveUS20130249504A1Current detectionEfficient power electronics conversionElectric variable regulationPower flowActive power factor correction
A power factor correction (PFC) controller for controlling at least a switching unit is provided. The PFC controller has a feedback control circuit, a conductive current detecting circuit, and a switching control circuit. The feedback control circuit generates a feedback control signal for turning off the switch according to a feedback voltage signal. The conductive current detecting circuit has a clamp circuit, which generates a clamped signal restricted in a positive potential varying range according to a negative potential portion of a conductive-current detecting signal, and generates a cutoff signal for turning off the switch according to at least the clamped signal. The switching control circuit is utilized for controlling the switch according to the feedback control signal and the cutoff signal.
Owner:NIKO SEMICON
Semiconductor device and display device
ActiveUS20160093641A1Solve the large power consumptionImprove accuracyStatic indicating devicesSolid-state devicesDisplay deviceEngineering
A semiconductor device capable of detecting a minute current with high accuracy is provided. The semiconductor device includes a first circuit, a second circuit, a first transistor, and a second transistor. A first analog signal is input to the first circuit via the first transistor. A second analog signal is input to the first circuit via the second transistor. The first analog signal includes a value of a first current. The second analog signal includes a value of a second current. The first circuit is capable of converting the first analog signal into a first digital signal. The second circuit is capable of generating a second digital signal based on the first digital signal. The first circuit is capable of converting the second analog signal into a third digital signal based on the second digital signal. The first or second transistor includes an oxide semiconductor in a channel.
Owner:SEMICON ENERGY LAB CO LTD
Resistive component and method of manufacturing the same
ActiveUS20100039211A1Improve stabilityAdhesionResistor chip manufactureEnvelope/housing resistor manufactureElectrical resistance and conductanceOptoelectronics
A resistive component suitable for detecting electric current in a circuit and a method of manufacturing the resistive component are provided. The resistive component includes a carrier, a resistive layer, an electrode unit, an upper oxide layer and a protective layer. The resistive layer comprises copper alloy and is disposed on the carrier. The electrode unit is electrically connected to the resistive layer. The upper oxide layer is disposed on a part of a surface of the resistive layer and includes oxides of the resistive layer. The protective layer covers at least a part of the upper oxide layer.
Owner:CYNTEC
Rechargeable motor-driven ratchet wrench having power-off protection
A rechargeable motor-driven ratchet wrench having power-off protection of the present invention includes a motor, a rechargeable battery and a power-off protection device. When the loaded current of the motor exceeds a set default value of a reference circuit, the power-off protection device disconnects the power supply of the rechargeable battery, so as to stop the motor operation. With the circuit design of the power-off protection device, the ratchet wrench can be ensured to provide usage safety and also usage lifespan of the ratchet wrench can be extended.
Owner:TECHWAY INDAL
Vehicle power supply device
InactiveUS20090295329A1Simple configurationCurrent detectionCharge equalisation circuitElectric devicesRechargeable cellHigh voltage battery
The vehicle power supply device includes a high-voltage battery portion 1 that includes a plurality of serially-connected rechargeable batteries, a current detecting portion 3 that detects the current of the battery portion 1, a voltage detecting circuit 4 that detects the voltage of the battery portion 1, and a power supply circuit 5 that supplies power to power supply lines 20 of the voltage detecting circuit 4 and the current detecting portion 3. The current detecting portion 3 includes a shunt resistor 7 serially connected to the batteries, and a current detecting circuit 6 for detecting the current based on the voltage between the ends of the shunt resistor 7. The power supply circuit 5 is an insulated-type power supply circuit 5A insulated from a vehicle chassis ground. The power supply circuit 5A supplies power to the power supply lines 20.
Owner:SANYO ELECTRIC CO LTD
Method and apparatus for controlling on-vehicle generator
ActiveUS20060186863A1Increase the output voltageCurrent detectionBatteries circuit arrangementsMotor/generator/converter stoppersIn vehicleExcitation current
An apparatus for controlling an on-vehicle generator is provided. The apparatus comprises a switching element, current detecting unit, setting unit and driving unit. The switching unit turns on / off an exciting current to an exciting winding of the generator, the switching element being driven responsively to a driving signal having an adjustable duty ratio. The setting unit sets the duty ratio based on (i) a difference between an output voltage of the generator and a target voltage value and (ii) a condition in which an electric load is disconnected from the generator, wherein the duty ratio is allowed to lower than a minimum value of the duty ratio depending on a generated state of the generator. The minimum value allows the exciting current to flow at a lower limit detectable by the current detecting unit, The driving unit drives the switching element based on the driving signal.
Owner:DENSO CORP
Method of checking earphone wearing state
ActiveUS9351090B2Current detectionPosition data use in hearing devicesHeadphones for stereophonic communicationInformation processingHeadphones
An information processing apparatus that detects an output from a 3-axis acceleration sensor included in an earphone unit worn by a user while the user is in a still state; monitors the output of the 3-axis acceleration sensor while a nodding gesture is performed by the user; detects a time when an angle of the nodding gesture reaches a maximum; and determines an earphone wearing state based on the output from the 3-axis acceleration sensor in the still state and the output from the 3-axis acceleration sensor at the time of detecting the maximum nodding angle.
Owner:SONY CORP
Diagnostic system for automatic transmission
ActiveUS20090157251A1Improve reliabilityIncrease freedomVehicle testingRegistering/indicating working of vehiclesMicrocomputerPower flow
A diagnostic system for an automatic transmission is provided in which a microcomputer determines that torque that can drive the driving wheels of the vehicle is not transmitted to an output shaft of the automatic transmission when the vehicle is stopped and the ignition key is operated to the OFF position, and performs forced energization of solenoids of solenoid valves associated with respective friction devices of the transmission, while monitoring current passing through the solenoid valves. If the current monitored does not match the current for energizing any of the solenoids, the microcomputer determines that the corresponding solenoid valve is at fault. Thus, the diagnostic system appropriately determines the presence of a fault of each solenoid valve for controlling the hydraulic pressure to each friction device, with increased flexibility and freedom.
Owner:TOYOTA JIDOSHA KK
Current detection apparatus for a car power source
InactiveUS20080224665A1Detection precision is loweredImprove accuracyBatteries circuit arrangementsElectric powerCar drivingCharge current
The current detection apparatus is provided with a current detection section (20; 30) that detects charging current and discharging current of the car driving battery (10), a level-shift circuit (40; 50) connected to the output-side of the current detection section (20; 30) that shifts the output of the current detection section (20; 30), and an A / D converter (60) connected to the output-side of the level-shift circuit (40; 50). The level-shift circuit (40; 50) shifts the current detection section (20; 30) output signal to unbalance the maximum discharging current and maximum charging current that can be detected.
Owner:SANYO ELECTRIC CO LTD
Gas concentration detection device
ActiveUS20170219513A1Deteriorate detectionGas sensitivity is reducedMaterial electrochemical variablesPower flowVoltage regulation
A gas concentration detection device includes a pump cell, a sensor cell, a monitor cell, a sensor current detection unit detecting a current outputted by the sensor cell, a monitor current detection unit detecting a current outputted by the monitor cell, a voltage adjustment unit adjusting a pump cell voltage applied to the pump cell, and a sensitivity determination unit determining a gas sensitivity of at least one of the sensor cell or the monitor cell. The voltage adjustment unit changes the pump cell voltage from a target voltage into a detection voltage where the concentration of the residual oxygen supplied to the sensor cell and the monitor cell is increased. The sensitivity determination unit determines the gas sensitivity based on a detection current detected by at least one of the sensor current detection unit or the monitor current detection unit in accordance with the concentration of the residual oxygen.
Owner:DENSO CORP
Remotely monitorable multi-port charging device
ActiveUS20160118824A1Easy to optimizeSave energyPower network operation systems integrationElectric powerElectricityWireless transmission
A remotely monitorable multi-port charging device has a circuit board provided with plural current-detecting elements and a processing unit. A charging portion having plural connecting ports is for connecting and charging multiple electronic devices. The connecting ports are electrically connected the current-detecting elements. A transmission unit is electrically connected to the circuit board. The current-detecting elements serve to detect charging currents of the electronic devices and generate detection signals. The transmission unit receives detection signals, and transmits the signals through wired or wireless transmission to a remote monitoring station. The processing unit performs remote control through the transmission unit, and switch charging states of the electronic devices at the connecting ports. The charging states include a fast charging mode, a slow charging mode, an adjustment mode, a power-saving mode and a mis-connection mode. Thereby, the multi-port charging device can manage all the connected electronic devices rapidly and effectively.
Owner:HAN HSU
Diagnostic system for automatic transmission
InactiveUS8032274B2Increase flexibilityIncrease freedomVehicle testingMachine gearing/transmission testingMicrocomputerDrive wheel
A diagnostic system for an automatic transmission is provided in which a microcomputer determines that torque that can drive the driving wheels of the vehicle is not transmitted to an output shaft of the automatic transmission when the vehicle is stopped and the ignition key is operated to the OFF position, and performs forced energization of solenoids of solenoid valves associated with respective friction devices of the transmission, while monitoring current passing through the solenoid valves. If the current monitored does not match the current for energizing any of the solenoids, the microcomputer determines that the corresponding solenoid valve is at fault. Thus, the diagnostic system appropriately determines the presence of a fault of each solenoid valve for controlling the hydraulic pressure to each friction device, with increased flexibility and freedom.
Owner:TOYOTA JIDOSHA KK
Motor control device and motor control method
InactiveUS20050019024A1Improve accuracyCurrent detectionAC motor controlElectric motor controlDriving currentOvercurrent
A motor control device selectively turns on or off a drive transistor in-accordance with a PWM control signal Sp, such that a drive current Im supplied to a motor is adjusted. The device also samples and holds a motor current Sm for obtaining a motor current value Ih. With reference to the motor current value Ih, the device protects the motor from an overcurrent. Sampling and holding of the motor current Sm is performed for a sampling and holding time Ts. The sampling and holding time Ts corresponds to a time period between a first point in time when the level of the PWM control signal Sp is switched for turning off the drive transistor and a second point in time that precedes the first point in time by a predetermined period. As a result, the motor current value Ih is detected with high accuracy.
Owner:ASMO CO LTD
Driving method of switching element and power supply unit
InactiveUS20110115451A1Avoid unnecessary wasteReduce conduction lossEfficient power electronics conversionDc-dc conversionEngineeringPower MOSFET
In a power supply unit, a main MOS and a sub MOS connected in parallel in a low-side power MOSFET section, a sensing MOS which is provided on a same semiconductor substrate with the low-side power MOSFET section, detects information corresponding to a load of the low-side power MOSFET section and is smaller in number than the transistors connected in parallel of the low-side power MOSFET section, and a control section for driving the main MOS and the sub MOS based on the information detected by the sensing MOS are provided.
Owner:RENESAS ELECTRONICS CORP
Outside rearview mirror flexing mechanism and control method thereof
An outside rearview mirror flexing mechanism, which is capable of moving the outside rearview mirror between a flexed position and an extended position and vice versa, and which is of the type comprising an electric motor, a mechanical transmission and an electronic control circuit. The flexing mechanism is capable of attaining an activated state by being connected to an electrical power source, and it is capable of being in a locked position and in an unlocked position. The flexing mechanism is provided with a position detector which is capable of detecting the locked position and the unlocked position.
Owner:FICO MIRRORS SA
Remotely monitorable multi-port charging device
ActiveUS9509155B2Save energyEasily informedPower network operation systems integrationSecondary cellsCharge currentWireless transmission
A remotely monitorable multi-port charging device has a circuit board provided with plural current-detecting elements and a processing unit. A charging portion having plural connecting ports is for connecting and charging multiple electronic devices. The connecting ports are electrically connected the current-detecting elements. A transmission unit is electrically connected to the circuit board. The current-detecting elements serve to detect charging currents of the electronic devices and generate detection signals. The transmission unit receives detection signals, and transmits the signals through wired or wireless transmission to a remote monitoring station. The processing unit performs remote control through the transmission unit, and switch charging states of the electronic devices at the connecting ports. The charging states include a fast charging mode, a slow charging mode, an adjustment mode, a power-saving mode and a mis-connection mode. Thereby, the multi-port charging device can manage all the connected electronic devices rapidly and effectively.
Owner:HAN HSU
Power Management Method and Power Management System
ActiveUS20140062193A1Current detectionDc network circuit arrangementsCurrent/voltage measurementDriving currentComputer module
A power management method includes: reading the driving current; determining if a driving current of an electronic device is less than or equal to a first steady current value for a first period of time; turning off a first electronic module to decrease the driving current when the driving current is less than or equal to the first steady current value for the first period of time; determining if the driving current is within a first judging range for a second period of time; updating the first steady current value with a second steady current value when the driving current is within the first judging range for the second period of time; determining if the second steady current value is less than or equal to an energy saving set value.
Owner:PEGATRON
Current detection apparatus for a car power source
InactiveUS7812570B2Improve accuracyComplex structureBatteries circuit arrangementsElectric powerCharge currentCar driving
A current detection apparatus includes a current detection section that detects charging current and discharging current of the car driving battery, a level-shift circuit connected to the output-side of the current detection section that shifts the output of the current detection section, and an A / D converter connected to the output-side of the level-shift circuit. The level-shift circuit shifts the current detection section output signal to unbalance the maximum discharging current and maximum charging current that can be detected.
Owner:SANYO ELECTRIC CO LTD
Circuit protection device and protection method thereof
ActiveUS20130027826A1More currentSolve the real problemEmergency protective arrangements for automatic disconnectionControl signalEngineering
A circuit protection device and a protection method thereof are provided. The circuit protection device includes a pulse width modulation unit which detects in order for a plurality of current phase of a plurality of transistors. The pulse width modulation unit decides the current phase of the transistors override a first threshold value whether. Then, the pulse width modulation unit sends a control signal to close the transistor that the current phase exceeds the first threshold value, so as to avoid the transistor burn down.
Owner:GIGA BYTE TECH CO LTD
Semiconductor device and display device
ActiveUS10141342B2Solve the large power consumptionImprove accuracyStatic indicating devicesSolid-state devicesPower semiconductor devicePower flow
Owner:SEMICON ENERGY LAB CO LTD
Gas concentration detection device
ActiveUS10564120B2Deteriorate detectionReduce sensitivityMaterial electrochemical variablesEngineeringGas concentration
A gas concentration detection device includes a pump cell, a sensor cell, a monitor cell, a sensor current detection unit detecting a current outputted by the sensor cell, a monitor current detection unit detecting a current outputted by the monitor cell, a voltage adjustment unit adjusting a pump cell voltage applied to the pump cell, and a sensitivity determination unit determining a gas sensitivity of at least one of the sensor cell or the monitor cell. The voltage adjustment unit changes the pump cell voltage from a target voltage into a detection voltage where the concentration of the residual oxygen supplied to the sensor cell and the monitor cell is increased. The sensitivity determination unit determines the gas sensitivity based on a detection current detected by at least one of the sensor current detection unit or the monitor current detection unit in accordance with the concentration of the residual oxygen.
Owner:DENSO CORP
Electric compressor
ActiveUS20210164459A1Increase in sizeCurrent detectionConversion constructional detailsElectrical testingBusbarElectrical connection
An electric compressor includes an electric motor, and a motor controller configured to drive the electric motor. The motor controller includes a high voltage circuit board on which switching elements are mounted, a low voltage circuit board on which a control circuit controlling switching operation of the switching elements is mounted, an input connector, an output connector, and a current sensor. The high voltage circuit board and the low voltage circuit board are stacked with each other. The output connector is integrated with a detection busbar that provides electrical connection between the high voltage circuit board and the low voltage circuit board, and through which detection signals indicative of the output current are output to the control circuit.
Owner:TOYOTA IND CORP
Circuit protection device and protection method thereof
ActiveUS8659863B2Prevents the PWM unit, the transistor or the processor from burning downAvoids the excessive current or the overhigh temperatureEmergency protective arrangements for automatic disconnectionControl signalEngineering
A circuit protection device and a protection method thereof are provided. The circuit protection device includes a pulse width modulation unit which detects in order for a plurality of current phase of a plurality of transistors. The pulse width modulation unit decides the current phase of the transistors override a first threshold value whether. Then, the pulse width modulation unit sends a control signal to close the transistor that the current phase exceeds the first threshold value, so as to avoid the transistor burn down.
Owner:GIGA BYTE TECH CO LTD
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