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公开(公告)号：US09929649B2
公开(公告)日：2018-03-27
申请号：US15042406
申请日：2016-02-12
发明人： Euisik Yoon , Sung-Yun Park
CPC分类号： H02M3/158 , G05F1/563 , H02M3/157 , H02M2001/0019 , H02M2001/0054 , H02M2003/1566
摘要： A pulse width modulated power converter is presented with load-adaptive power transistor scaling scheme using analog-digital hybrid control. The coarse digital control generates an approximate duty cycle necessary for driving a given load and selects an appropriate width of power transistors to minimize redundant power dissipation. The fine analog control provides the final tuning of the duty cycle to compensate for the error from the coarse digital control. The mode switching between the analog and digital controls is accomplished by a mode arbiter which estimates the average duty cycle for the given load condition from limit cycle oscillations induced by the coarse adjustments.
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公开(公告)号：US09917528B2
公开(公告)日：2018-03-13
申请号：US14868215
申请日：2015-09-28
IPC分类号： H02M5/458 , H02M7/217 , H02M7/155 , H02M3/335 , H02M7/48 , H02M1/36 , H02J7/00 , H02M1/08 , H05B33/08 , H02M1/00
CPC分类号： H02M5/458 , H02J7/0052 , H02J2007/0062 , H02M1/08 , H02M1/36 , H02M3/33507 , H02M7/155 , H02M7/217 , H02M7/2176 , H02M7/48 , H02M2001/0009 , H02M2001/0019 , H05B33/0809 , Y10T307/406
摘要： An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.
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公开(公告)号：US20180019674A1
公开(公告)日：2018-01-18
申请号：US15667522
申请日：2017-08-02
发明人： Hassan Ihs
CPC分类号： H02M3/158 , H02M1/32 , H02M3/157 , H02M2001/0019 , H02M2003/1566
摘要： A DC-DC converter operating in pulse frequency modulation (PFM) and pulse width modulation (PWM) modes includes a plurality of PWM signal generators. The PWM signal generators generate PWM signals with different duty cycles. PWM signals with larger duty cycles may be selected for use in undervoltage situations.
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公开(公告)号：US20180019662A1
公开(公告)日：2018-01-18
申请号：US15732110
申请日：2017-09-19
CPC分类号： H02M1/4208 , H02M2001/0019 , H02M2001/0025 , Y02B70/126
摘要： A power factor correction voltage controller is disclosed. In one embodiment, the controller has a linear PI compensator, a moving average filter, a non-linear error circuit, a hysteretic peak control, and an output power feedforward. The power factor correction voltage controller provides regulation of maximum and minimum voltage values but without allowing large periodic fluctuations in the input power/current.
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公开(公告)号：US20170302172A1
公开(公告)日：2017-10-19
申请号：US15509934
申请日：2015-09-07
CPC分类号： H02M3/156 , H02J9/00 , H02M3/1584 , H02M3/1588 , H02M2001/0019 , H02M2003/1566 , Y02B70/1425 , Y02B70/1466
摘要： The present invention introduces a new compact Voltage Regulator Module (VRM) solution that hybrids a buck converter with a resonant switched-capacitor auxiliary circuit that is connected at the load side. By using a new control concept of the present invention, the auxiliary circuit effectively mimics increased capacitance during loading and unloading transient events, reducing the burden on both the input and output filters, and reduces the current stress.
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公开(公告)号：US20170271981A1
公开(公告)日：2017-09-21
申请号：US15119242
申请日：2015-09-29
CPC分类号： H02M3/04 , H02M5/04 , H02M7/04 , H02M7/44 , H02M2001/0019 , H02M2001/0025 , H02M2001/008
摘要： A converter control unit, method, and computer program product for controlling a power supply device including a converter that provides power to a load. In one embodiment, the converter control unit is configured to obtain a load voltage measure from the converter representing a load voltage of the load, obtain an estimate of a voltage drop between the converter and the load, and obtain a reference voltage corresponding to a desired load voltage. The converter control unit is also configured to adjust the reference voltage or the load voltage measure with the estimate of the voltage drop, and compare, after the adjustment, the load voltage measure with the reference voltage to acquire an error signal. The converter control unit is still further configured to control the converter to provide the load voltage based on the error signal.
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公开(公告)号：US20170237348A1
公开(公告)日：2017-08-17
申请号：US15042406
申请日：2016-02-12
发明人： Euisik YOON , Sung-Yun PARK
IPC分类号： H02M3/158
CPC分类号： H02M3/158 , G05F1/563 , H02M3/157 , H02M2001/0019 , H02M2001/0054 , H02M2003/1566
摘要： A pulse width modulated power converter is presented with load-adaptive power transistor scaling scheme using analog-digital hybrid control. The coarse digital control generates an approximate duty cycle necessary for driving a given load and selects an appropriate width of power transistors to minimize redundant power dissipation. The fine analog control provides the final tuning of the duty cycle to compensate for the error from the coarse digital control. The mode switching between the analog and digital controls is accomplished by a mode arbiter which estimates the average duty cycle for the given load condition from limit cycle oscillations induced by the coarse adjustments.
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公开(公告)号：US20170229968A1
公开(公告)日：2017-08-10
申请号：US15414420
申请日：2017-01-24
CPC分类号： H02M3/33507 , H02M2001/0019 , H02M2001/0032 , Y02B70/16
摘要： Methods of operating switching power supplies are disclosed. A power supply has a transformer and a switch coupled to the primary side of the transformer for controlling the current flow through the primary side of the transformer. A method includes determining the output voltage of the power supply. A first minimum switching frequency is generated for driving the switch in response to the output voltage being greater than a nominal output voltage and less than a predetermined voltage. A second minimum switching frequency is generated for driving the switch in response to the output voltage being equal to or greater than the predetermined voltage, wherein the first minimum switching frequency is greater than the second minimum switching frequency.
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公开(公告)号：US09621028B2
公开(公告)日：2017-04-11
申请号：US14692465
申请日：2015-04-21
发明人： Sicong Lin , Wenbin Lu , Wangmiao Hu , Lijie Jiang , Qiming Zhao , Guangchao Zhang
CPC分类号： H02M1/4225 , H02M2001/0012 , H02M2001/0019 , Y02B70/126 , Y02P80/112
摘要： A PFC circuit having a switching circuit and a control circuit, the control circuit controls an operation mode of the switching circuit based on an input current and a switching frequency of the switching circuit, when the switching circuit works under a continuous current mode, the switching circuit is turned ON when the input current is less than an OFF current reference signal, and when the switching circuit works under a first discontinuous mode or a second discontinuous mode, the switching circuit is turned ON after a turn ON delay time period when the input current is less than the OFF current reference signal.
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公开(公告)号：US09537080B2
公开(公告)日：2017-01-03
申请号：US14586550
申请日：2014-12-30
CPC分类号： H01L41/042 , H01L41/25 , H02M7/53803 , H02M7/797 , H02M2001/0019 , Y10T29/42
摘要： A system for driving a piezoelectric load includes a direct current (DC) voltage source and a bi-directional DC-to-DC converter having a primary side coupled to the DC voltage source and a secondary side and comprising a control input configured to receive a first control signal configured to control conversion of a first voltage on the primary side of the bi-directional DC-to-DC converter to a second voltage on the secondary side of the bi-directional DC-to-DC converter. The driver system also includes a capacitor coupled to the secondary side of the bi-directional DC-to-DC converter and configured to remove a DC offset of the second voltage and includes a reactive load having a first terminal coupled to the capacitor and a second terminal coupled to the secondary side of the bi-directional DC-to-DC converter.
摘要翻译： 用于驱动压电负载的系统包括直流（DC）电压源和双向DC-DC转换器，其具有耦合到DC电压源的初级侧和次级侧，并且包括被配置为接收 第一控制信号被配置为控制双向DC-DC转换器的初级侧的第一电压的转换为双向DC-DC转换器的次级侧上的第二电压。 驱动器系统还包括耦合到双向DC-DC转换器的次级侧的电容器，其被配置为去除第二电压的DC偏移，并且包括具有耦合到电容器的第一端子的无功负载和第二 端子耦合到双向DC-DC转换器的次级侧。
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