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42 results about "Buck power converter" patented technology
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Three phase buck power converters having input current control
InactiveUS7139180B1Efficient power electronics conversionAc-dc conversionCurrent mode controlPower factor
A three phase buck power converter having input power control is described. The power converter uses a three input buck converter comprising switches for each phase, a catch rectifier, an inductor and an output capacitor. The duty cycle of the three switches is constrained to have a sine function relationship that may be derived from the input voltage wave form or from a reference oscillator. When so constrained, the input currents have high power factor. The output is a precise, high quality dc voltage, comparable to the output of a dc—dc buck converter, and the dynamic response is comparable. Voltage mode and current mode controls are shown, as is a precise line regulation feed forward for the voltage mode embodiment. The three phase buck power converter may be operated in reverse as a three phase boost converter, as they are reciprocal. A three phase ac—ac converter may have a three phase buck converter as its input and a three phase boost converter as its output.
Owner:HERBERT EDWARD
Bidirectional buck-boost power converters, electric starter generator system employing bidirectional buck-boost power converters, and methods therefor
ActiveUS20060103341A1Single-phase induction motor startersElectronic commutation motor controlStarter generatorBoost power converter
A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14, 15. A method for controlling a voltage output of a machine starter generator having an inverter rectifier and bidirectional buck-boost converter, includes outputting a dc voltage controlled by bidirectional buck-boost pulse width modulation (PWM) switching control, when the starter generator is in a generator mode.
Owner:GENERAL ELECTRIC CO
Control circuit and method for a buck-boost power converter
ActiveUS20110074373A1Improve efficiencyMinimize output rippleDc-dc conversionElectric variable regulationEngineeringControl circuit
Control signals are generated for a buck-boost power stage of a buck-boost power converter to convert an input voltage to an output voltage. The buck-boost power stage includes an inductor and at least two power switches connected thereto. The output voltage is monitored to generate an error signal having clamped level according to a first detecting signal related to at least one of the input voltage, output voltage and inductor current. In a buck-boost mode, a compensation signal and a duty insertion signal are generated according to a second detecting signal related to at least one of the input voltage, output voltage, inductor current and variation of the output voltage, the error signal is compensated with the compensation signal to generate a compensated error signal, and the control signals are determined upon the combination of the compensated error signal, the duty insertion signal and a ramp signal.
Owner:RICHTEK TECH
Simplified current sense for buck LED driver
A current sense and feedback circuit is provided for a non-isolated Buck power converter to maintain constant current load regulation. The Buck converter may have a high side power switch and may include an input port, a switcher unit including a switch and a controller, an inductor coupled to the output, and a freewheeling diode for circulating the inductor current when the switch is open. The simplified current sense and feedback circuit of the power converter may include a current sense resistor module coupled to the freewheeling diode to provide a sense signal to the controller. The controller may also be coupled to the output of the power converter to sense an over voltage condition. The simplified current sense and feedback circuit may provide output regulation while maintaining a low component count, small size, and low loss that makes the power converter suitable for use in compact design applications.
Owner:POWER INTEGRATIONS INC
Bidirectional hysteretic power converter
ActiveUS20120299553A1Reduce the valueSmall sizeBatteries circuit arrangementsDc-dc conversionSwitching frequencyEngineering
Owner:QUALCOMM INC
Multi-die DC-DC Buck Power Converter with Efficient Packaging
ActiveUS20080024102A1Efficient packagingReduced footprintSemiconductor/solid-state device detailsSolid-state devicesMOSFETDie bonding
A DC-DC buck converter in multi-die package is proposed having an output inductor, a low-side Schottky diode and a high-side vertical MOSFET controlled by a power regulating controller (PRC). The multi-die package includes a first die pad with the Schottky diode placed there on side by side with the vertical MOSFET. The PRC die is attached atop the first die pad via an insulating die bond. Alternatively, the first die pad is grounded. The vertical MOSFET is a top drain N-channel FET, the substrate of Schottky diode die is its anode. The Schottky diode and the vertical MOSFET are stacked atop the first die pad. The PRC is attached atop the first die pad via a conductive die bond. The Schottky diode die can be supplied in a flip-chip configuration with cathode being its substrate. Alternatively, the Schottky diode is supplied with anode being its substrate without the flip-chip configuration.
Owner:ALPHA & OMEGA SEMICON LTD
Bi-directional DC to DC power converter having a neutral terminal
ActiveUS20100072819A1Dc network circuit arrangementsConversion with intermediate conversion to dcInductanceBoost power converter
A bidirectional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
Owner:ABLEREX ELECTRONICS CO LTD
Bi-directional DC to DC power converter having a neutral terminal
ActiveUS8130524B2Dc network circuit arrangementsConversion with intermediate conversion to dcEngineeringBoost power converter
A bi-directional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
Owner:ABLEREX ELECTRONICS CO LTD
Cross-interference reduction of a buck power converter
ActiveUS8803492B2Electric signal transmission systemsDc network circuit arrangementsVoltage referenceInterference reduction
A power converter includes a first conversion stage for converting an input voltage to a first output voltage and a second conversion stage for converting the first output voltage to a second output voltage. An error signal is generated according to a reference voltage and a feedback signal extracted from the second conversion stage, and a feed forward signal is generated from the error signal and injected into the first conversion stage to stabilize the first output voltage. The feedback signal is a function of the second output voltage and thus, the error signal varies with the second output voltage. As a result, the first output voltage will be stabilized when the second output voltage varies, due to the varied feed forward signal.
Owner:RICHTEK TECH
Bidirectional buck-boost power converters
A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14, 15. A method for controlling a voltage output of a machine starter generator having an inverter rectifier and bidirectional buck-boost converter, includes outputting a dc voltage controlled by bidirectional buck-boost pulse width modulation (PWM) switching control, when the starter generator is in a generator mode.
Owner:GENERAL ELECTRIC CO
Simplified current sense for buck LED driver
A current sense and feedback circuit is provided for a non-isolated Buck power converter to maintain constant current load regulation. The Buck converter may have a high side power switch and may include an input port, a switcher unit including a switch and a controller, an inductor coupled to the output, and a freewheeling diode for circulating the inductor current when the switch is open. The simplified current sense and feedback circuit of the power converter may include a current sense resistor module coupled to the freewheeling diode to provide a sense signal to the controller. The controller may also be coupled to the output of the power converter to sense an over voltage condition. The simplified current sense and feedback circuit may provide output regulation while maintaining a low component count, small size, and low loss that makes the power converter suitable for use in compact design applications.
Owner:POWER INTEGRATIONS INC
Single inductor multiple output power converter
ActiveUS8773088B2Minimum cross regulationEasy to superviseEfficient power electronics conversionDc-dc conversionMultiplexingTransverter
A novel method to operate and control single inductor multiple output switching power converter is presented. The method includes the means for generating one or more synthetic ripple signals and operating the converter at constant switching frequency allowing high frequency operation, maintaining stability in all conditions with minimum cross regulation between the outputs independently on the levels of load present at the outputs. The method further includes means for setting the maximum frequency of multiplexing the energy stored in the inductor between the various outputs reaching the desired compromise between the value of the output capacitors, the switching frequency of the output power devices and the acceptable output voltage ripple.Two different topologies are proposed that can be used for single inductor multiple output buck power converters and for boost power converter allowing the extension to buck-boost configurations as well.
Owner:QUALCOMM INC
Modified oscillator and decompression power converter
InactiveCN101295927AReduce volumeImprove transient responseApparatus without intermediate ac conversionElectric variable regulationCapacitanceControl signal
The invention discloses an oscillator which comprises a voltage division circuit, a charging resistance, a capacitance, a comparator circuit and a discharging circuit. The voltage division circuit is connected with a power source and provides a divided voltage reflecting the voltage of the power source; the power source charges the capacitance by the charging resistance; the comparator circuit compares the voltage drop of the capacitance and the divided voltage; when the voltage drop of the capacitance is higher than or equal to the divided voltage, the comparator circuit outputs a discharge control signal to control the discharging circuit to discharge the capacitance; when the voltage drop of the capacitance is lower than the divided voltage, the comparator circuit outputs a non-discharge control signal to control the discharging circuit to stop discharging the capacitance; thus the oscillator generates a oscillator signal, the amplitude of which is in proportion to the power source voltage.
Owner:WUXI ZGMICRO ELECTRONICS CO LTD
Bidirectional hysteretic power converter
ActiveUS8441231B2Reduce the valueSmall sizeBatteries circuit arrangementsDc-dc conversionTransverterSwitching frequency
Owner:QUALCOMM INC
Single Inductor Multiple Output Power Converter
ActiveUS20130162228A1Minimum cross regulationEasy to superviseEfficient power electronics conversionDc-dc conversionMultiplexingTransverter
A novel method to operate and control single inductor multiple output switching power converter is presented. The method includes the means for generating one or more synthetic ripple signals and operating the converter at constant switching frequency allowing high frequency operation, maintaining stability in all conditions with minimum cross regulation between the outputs independently on the levels of load present at the outputs. The method further includes means for setting the maximum frequency of multiplexing the energy stored in the inductor between the various outputs reaching the desired compromise between the value of the output capacitors, the switching frequency of the output power devices and the acceptable output voltage ripple.Two different topologies are proposed that can be used for single inductor multiple output buck power converters and for boost power converter allowing the extension to buck-boost configurations as well.
Owner:QUALCOMM INC
Saw tooth wave generator of boost-buck power supply converter and method
InactiveCN102055306ARapid responseStable output voltagePulse generatorPower conversion systemsPeak valueEngineering
The invention discloses a method for generating saw tooth wave signals in a boost-buck power supply converter. The boost-buck power supply converter is used for converting an input voltage into an output voltage. The method is characterized by comprising the following steps of: 1, detecting the input voltage; and 2, providing a first saw tooth wave signal and a second saw tooth wave signal according to the input voltage, wherein the peak value of the first saw tooth wave signal is changed together with the input voltage, and the valley value of the second saw tooth wave signal is changed together with the input voltage. A saw tooth wave generator of the boost-buck power supply converter and the saw tooth wave signal generating method have the advantage of quickly responding to stabilize the output voltage when the input voltage is changed.
Owner:RICHTEK TECH
Energy predictive buck converter
ActiveUS20110115455A1Improve stabilityOptimizes transient responseDc-dc conversionElectric variable regulationEnergy balancedEnergy supply
In a switched-mode buck power converter, superior regulation with excellent transient response is provided when per-cycle energy demand is determined and balanced with per-cycle inductive energy supply to control per-cycle inductive energy charging. Such per cycle inductive energy calculation is improved through the prediction of pedestal energy during operating periods of Continuous Conduction Mode (CCM). Further, recovery from severe transients sometimes straddles multiple chopping cycles. Such recovery is best obtained by preserving energy balance information from one or more un-recovered chopping cycles, to be used to restore energy balance in subsequent cycles. Significant improvement over prior art converters may be obtained even when the energy balance data used for control and recovery are imprecise approximations of true energy demand and supply.This invention provides control circuitry and a method for using energy balance information to better control a buck converter, with the further improvements of pedestal energy prediction and extension of energy balance over multiple chopping cycles, and for using said circuitry and methods to maintain stability and recover from transients more reliably than in the prior art.
Owner:COGNIPOWER
Multi-die DC-DC buck power converter with efficient packaging
ActiveUS7825508B2Reduced footprintMinimized vertical MOSFET source inductanceSemiconductor/solid-state device detailsSolid-state devicesMOSFETEngineering
A DC-DC buck converter in multi-die package is proposed having an output inductor, a low-side Schottky diode and a high-side vertical MOSFET controlled by a power regulating controller (PRC). The multi-die package includes a first die pad with the Schottky diode placed there on side by side with the vertical MOSFET. The PRC die is attached atop the first die pad via an insulating die bond. Alternatively, the first die pad is grounded. The vertical MOSFET is a top drain N-channel FET, the substrate of Schottky diode die is its anode. The Schottky diode and the vertical MOSFET are stacked atop the first die pad. The PRC is attached atop the first die pad via a conductive die bond. The Schottky diode die can be supplied in a flip-chip configuration with cathode being its substrate. Alternatively, the Schottky diode is supplied with anode being its substrate without the flip-chip configuration.
Owner:ALPHA & OMEGA SEMICON LTD
Energy predictive buck converter
ActiveUS8570008B2Maintain energy balanceOptimizes responseDc-dc conversionElectric variable regulationConvertersSoftware engineering
A switched-mode buck power converter includes a power source, a first switch, an inductor for storing energy, a diode or second switch, and control circuitry. The inductor has a first end connected to an output node of the power converter, wherein the first switch is connected between the power source and a second end of the inductor. The diode or second switch is connected, at the second end of the inductor, between the first switch and a common node of the power converter. The control circuitry is configured to (i) characterize per cycle energy demand of the power converter, (ii) characterize per cycle inductive energy of the power converter, and (iii) compare the characterized energy demand to the characterized inductive energy to control the first switch.
Owner:COGNIPOWER LLC
Buck power converter
InactiveUS20140159684A1Effectively resolving a ringing issueReduce noiseEfficient power electronics conversionDc-dc conversionRing circuitEngineering
A buck power converter includes a power transistor, an inductor, a first diode, and an anti-ringing circuit. The power transistor has a first terminal, a second terminal, and a control terminal. The first terminal of the power transistor receives an input voltage, and the control terminal of the power transistor receives a pulse width modulation (PWM) signal. The anti-ringing circuit detects a detection voltage on the second terminal of the power transistor. According to the detection voltage, the anti-ringing circuit provides at least one second diode serially coupled between the second terminal of the power transistor and a reference ground terminal in a forward-biased manner, so as to clamp a voltage swing of the detection voltage.
Owner:EXCELLIANCE MOS
Multiphase low lc buck regulator
ActiveUS20140021931A1Improve efficiencySmall sizeDc-dc conversionElectric variable regulationLinear regulatorPhysical space
A buck power converter creates a desired output voltage from a greater input voltage with higher efficiency than linear regulators or charge pumps. For compact-size and cost sensitive products, the use of the buck power converter is hindered mainly because of lack of physical space and increases in the cost of the passive components like the inductor and capacitor. Techniques are presented to reduce the sizes of the passive components so that they can be integrated on-chip or in-package or on board. A signal converter in the buck power converter determines the duty cycle of a switching control signal. The switching control signal would ordinarily have driven a power switching circuit that provides current to the inductor in the buck power converter. The signal converter outputs a modified (multiphase) switching control signal that includes multiple separated on-periods that taken together approximate the duty cycle of the switching control signal while maintaining the same control loop frequency. The multiphase switching signal drives the power switching circuit to provide current to the inductor during each of the multiple separated on-periods so that the output voltage ripple decreases by a factor of the number of phases in the modified switching signal. In this way, if the ripple amplitude is kept same, the sizes of the passive components can be reduced by the factor of the number of phases in the modified switching control signal.
Owner:SANDISK TECH LLC
Buck power converter capable of improving interactive interference and method thereof
ActiveCN101753015AImprove InteractionEnhanced interactionApparatus without intermediate ac conversionVoltage referenceElectrical and Electronics engineering
The invention discloses a method for improving the interactive interference of a buck power converter. The power converter comprises a first switching stage and a second switching stage, wherein the first switching stage converts an input voltage into a first output voltage, and the second switching stage converts the first output voltage into a second output voltage. The method is characterized in that the method comprises the following steps: 1. according to a reference voltage and a feedback voltage, producing an error signal, wherein the feedback voltage is the function of the second output voltage; and 2. producing a forward feed signal to the first switching stage from the error signal so as to stabilize the first output voltage. In the invention, the buck power converter capable of improving interactive interference and the method thereof have the advantage of improving the interactive interference between the output ends of the power supplies.
Owner:RICHTEK TECH
Buck Power Converter
ActiveCN103840661BReduced ringingReduce noiseDc-dc conversionElectric variable regulationRing circuitInductance
Disclosed is a buck power converter. The buck power converter comprises a power transistor, an inductor, a first diode and an anti-ringing circuit. The power transistor is provided with a first end, a second end and a control end. The first end receives an input voltage. The control end receives a pulse-width modulation signal. The anti-ringing circuit detects a detection voltage at the second end of the power transistor, and according to the detection voltage, provides at least one second diode for series connection between the second end of the power transistor and a reference grounding end in a forward bias mode so as to clamp the voltage value of the detection voltage.
Owner:EXCELLIANCE MOS
Buck power converter
The invention provides a buck power converter, which is used for converting a power input voltage into a power output voltage. The buck power converter comprises a first rectifier filter circuit and a power integrated circuit. The first rectifier filter circuit is used for carrying out rectification and filtering on an output intermediate voltage and converting the output intermediate voltage into a power output voltage; and the power integrated circuit is used for converting the power output voltage into the output intermediate voltage. Besides, the power integrated circuit comprises a voltage output pin and a second rectifier filter circuit. The voltage output pin is used for outputting the output intermediate voltage; and the second rectifier filter circuit, which is coupled with the voltage output pin, is used for carrying out rectification and filtering on the output intermediate voltage so as to convert the output intermediate voltage into a detection voltage, wherein the detection voltage is the same as the power output voltage.
Owner:ADVANCED POWER ELECTRONICS CORP
Controller for buck dc/dc converter with effective decoupling
A DC-DC power converter, a control component of a DC-DC power converter, and a method of controlling a buck DC-DC power converter are provided. The method includes receiving at least one of a measured load current and a measured input voltage. The measured load current is a measurement of current that flows from the buck inductor of a physical component of the buck DC-DC power converter. The measured input voltage is a measurement of the DC link input voltage measured across a DC link of the physical component of the buck DC-DC power converter. The method further includes generating a control signal to control a pulse width modulator (PWM), wherein the control signal is based on at least one of the measured load current and the measured input voltage. The PWM is configured to control at least one switch that is coupled to the buck inductor to allow the buck inductor to operate on a current flowing from the DC link only when the at least one switch is turned ON.
Owner:HAMILTON SUNDSTRAND CORP
Robust control method and control system of direct-current buck converter and power converter
InactiveCN111641337ASolve Oscillation ProblemsStable power supply voltageDc-dc conversionElectric variable regulationCapacitanceControl signal
The invention discloses a robust control method and control system of a direct-current buck converter, and a direct-current buck power converter. The method comprises the following steps: S1, acquiring voltage at two ends of a capacitor of a converter and current flowing through the inductor of the converter; S2, respectively calculating values z1(k) and z2(k) of error variables z1 and z2 at a moment k according to the obtained voltage and current; and S3, setting the duty ratio of the on-off control signal of the switching tube of the converter as an actual control variable u, obtaining the value u(k) of the actual control variable u at the moment k, setting the duty ratio of the on-off control signal of the switching tube of the converter as u(k), and returning to S1. According to the invention, the control method can effectively solve the problem of bus voltage oscillation caused by non-linear change of the load so as to stabilize the power supply voltage, the calculated amount is small, the algorithm is simple and easy to understand, robust control is achieved through the combination of the first inequality and the second inequality and the backstepping method, items needing tobe amplified are amplified slightly, and output oscillation is small.
Owner:中国星网网络应用有限公司
Controller for buck DC/DC converter with effective decoupling
A DC-DC power converter, a control component of a DC-DC power converter, and a method of controlling a buck DC-DC power converter are provided. The method includes receiving at least one of a measured load current and a measured input voltage. The measured load current is a measurement of current that flows from the buck inductor of a physical component of the buck DC-DC power converter. The measured input voltage is a measurement of the DC link input voltage measured across a DC link of the physical component of the buck DC-DC power converter. The method further includes generating a control signal to control a pulse width modulator (PWM), wherein the control signal is based on at least one of the measured load current and the measured input voltage. The PWM is configured to control at least one switch that is coupled to the buck inductor to allow the buck inductor to operate on a current flowing from the DC link only when the at least one switch is turned ON.
Owner:HAMILTON SUNDSTRAND CORP
An ultra-high-speed generator rectifier based on automatic energy consumption matching
ActiveCN104578848BSafe and stable operationStrong loadAc-dc conversionDc-dc conversionCapacitancePositive power
An ultra-high-speed generator rectifier based on automatic energy consumption matching belongs to the field of power electronic converters. The invention solves the problem of energy mismatch between the independent power supply system for power generation and the load when the existing generator supplies power to the load by outputting a constant voltage through the electric energy converter. It includes three-phase rectifier bridge, buck step-down power converter, energy consumption matching circuit, drive circuit, controller and No. 1 capacitor C1; buck step-down power converter includes No. 1 power switch tube, No. 2 power switch tube, inductor and No. 2 capacitor C2; the energy consumption matching circuit includes No. 3 power switch tube and resistor R, the three-phase current input terminal of the three-phase rectifier bridge is connected with the three-phase current output terminal of the ultra-high-speed generator, and the positive pole power supply output of the three-phase rectifier bridge The terminals are simultaneously connected with one terminal of the No. 1 capacitor C1, the bus voltage signal input terminal of the controller, the positive power supply input terminal of the No. 1 power switch tube, and the positive power supply input terminal of the No. 3 power switch tube. It is mainly used in the field of generator rectification.
Owner:HARBIN INST OF TECH
Dynamic operating frequency control of a buck power converter having a variable voltage output
ActiveCN106208689AVariable output voltage rangeReduced switching frequencyEfficient power electronics conversionApparatus without intermediate ac conversionEngineeringCycle time
A switch controller for a variable output voltage power converter includes a pulse width modulator (PWM) output producing a pulsed signal for driving a power converter switch. A mode selector output is connected to a multiplier. A period selector output is connected to the multiplier and to a PWM input. The multiplier output is connected to another PWM input. A comparator output is connected to a period selector input. The period selector outputs a nominal cycle time to the PWM when an operating on-time state is greater than a minimum operating on-time. The period selector outputs an updated cycle time greater than the nominal cycle time when the operating on-time state is less than the minimum operating on-time causing the PWM to output a pulsed signal with the updated cycle time and a duty cycle equal to a duty cycle of an immediately preceding pulsed signal.
Owner:ASTEC INT LTD
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