Flyback converter with soft switching using auxiliary switch and
resonant circuit
    1.
    发明授权
    Flyback converter with soft switching using auxiliary switch and resonant circuit 失效
    反激式转换器采用软开关辅助开关和谐振电路

    公开(公告)号:US6005782A

    公开(公告)日:1999-12-21

    申请号:US173034

    申请日:1998-10-16

    摘要: A flyback converter has a main switch coupling a primary winding of a transformer between supply terminals, a duty cycle of the main switch controlling an output of the converter derived from a secondary winding of the transformer. Soft (zero voltage) switching of the main switch is facilitated by a snubber capacitor in parallel with the main switch. An auxiliary circuit coupled in parallel with the snubber capacitor and main switch includes a series-connected auxiliary switch, capacitor, and inductor coupled via another inductor to a full wave rectifier arrangement for recovering energy from the snubber capacitor. Resonant circuits provided by the auxiliary circuit facilitate soft switching of the auxiliary switch for low power loss and high frequency operation. The switches can be MOSFETs with reverse-poled diodes in parallel with their drain-source paths.

    摘要翻译: 反激式转换器具有主开关,其在电源端子之间耦合变压器的初级绕组,主开关的占空比控制从变压器的次级绕组获得的转换器的输出。 主开关的软(零电压)开关由与主开关并联的缓冲电容器促成。 与缓冲电容器和主开关并联耦合的辅助电路包括通过另一电感器耦合到全波整流器装置的串联辅助开关,电容器和电感器,用于从缓冲电容器恢复能量。 由辅助电路提供的谐振电路便于辅助开关的软开关,用于低功耗和高频工作。 这些开关可以是反向极化二极管与其漏源路径并联的MOSFET。

    Topology and control method for power factor correction
    2.
    发明授权
    Topology and control method for power factor correction 失效
    功率因数校正的拓扑和控制方法

    公开(公告)号:US06344986B1

    公开(公告)日:2002-02-05

    申请号:US09595425

    申请日:2000-06-15

    IPC分类号: H02M542

    摘要: In a power factor corrected AC-to-DC power supply system, a DC-to-DC power converter is coupled to the output of an AC-to-DC power converter in order to produce a regulated DC output signal from a rectified AC input signal. The AC-to-DC power converter and the DC-to-DC power converter each includes a switch for controlling the operation of their respective power converter. The AC-to-DC converter includes an inductor. The system provides power factor correction for minimizing harmonic distortion by including a controller that receives the regulated DC output voltage as a feedback signal, and in response, produces a series of drive pulses having predetermined constant duty cycle. These pulses are simultaneously fed to each switch, to operate the respective converters alternately between ON and OFF states. When the AC-to-DC converter is driven by a fixed duty cycle of the series of pulses, power factor correction is improved since the current flowing through the inductor is substantially proportional to the waveform of the rectified AC input signal. By preselecting the value of the inductor, the AC-to-DC converter is operable in a discontinuous mode when the instantaneous rectified AC input signal is low and in a continuous mode when the instantaneous rectified AC input signal is high.

    摘要翻译: 在功率因数校正的AC至DC电源系统中,DC-DC电力转换器耦合到AC-DC电力转换器的输出端,以便从整流的AC输入端产生稳定的DC输出信号 信号。 AC-DC电力转换器和DC-DC电力转换器各自包括用于控制其各自功率转换器的操作的开关。 AC-DC转换器包括电感器。 该系统通过包括接收调节的DC输出电压作为反馈信号的控制器来提供用于最小化谐波失真的功率因数校正,并且作为响应,产生具有预定的恒定占空比的一系列驱动脉冲。 这些脉冲同时馈送到每个开关,以在各自的开关状态之间交替地操作相应的转换器。 当由一系列脉冲的固定占空比驱动AC到DC转换器时,功率因数校正被改善,因为流过电感器的电流基本上与整流的AC输入信号的波形成正比。 通过预选电感器的值,当瞬时整流的AC输入信号为低电平时,AC瞬间整流的AC输入信号为高电平时,AC-DC转换器可在不连续模式下工作。

    Power converter for a power generator
    3.
    发明授权
    Power converter for a power generator 有权
    发电机功率转换器

    公开(公告)号:US08467200B2

    公开(公告)日:2013-06-18

    申请号:US13094260

    申请日:2011-04-26

    IPC分类号: H02M1/12

    摘要: Provided are methods, circuits, and systems for obtaining power from a power generator such as a photovoltaic cell or a fuel cell. The methods, circuits, and systems comprise converting substantially DC output power from the power generator into a high frequency AC voltage while rejecting or minimizing oscillations in the output power from the power generator; converting the high frequency AC voltage into a high frequency substantially sinusoidal voltage or current; and converting the high frequency substantially sinusoidal AC voltage or current into (i) a DC voltage or current, and (ii) a low frequency substantially sinusoidal AC voltage or current; wherein the high frequency substantially sinusoidal AC voltage or current is isolated from the DC voltage or current or the low frequency substantially sinusoidal AC voltage or current.

    摘要翻译: 提供了用于从诸如光伏电池或燃料电池的发电机获得电力的方法,电路和系统。 方法,电路和系统包括将来自发电机的基本上DC输出功率转换成高频AC电压,同时抑制或最小化来自发电机的输出功率的振荡; 将高频交流电压转换成高频大致正弦电压或电流; 并将高频大体正弦交流电压或电流转换为(i)直流电压或电流,以及(ii)低频大致正弦交流电压或电流; 其中所述高频大体上正弦的AC电压或电流与所述直流电压或电流或所述低频大体正弦交流电压或电流隔离。

    Tertiary side resonant DC/DC converter
    4.
    发明授权
    Tertiary side resonant DC/DC converter 失效
    三相谐振DC / DC转换器

    公开(公告)号:US5438497A

    公开(公告)日:1995-08-01

    申请号:US59973

    申请日:1993-05-13

    申请人: Praveen K. Jain

    发明人: Praveen K. Jain

    IPC分类号: H02M3/337 H02M3/335

    摘要: Resonant DC/DC converters are disclosed. The DC/DC converters according to the present invention include a bridged inverter, a resonant circuit, a high frequency transformer and a rectifying circuit. The high frequency transformer has a tertiary winding. The resonant circuit consists of a series resonant branch connected to the transformer primary winding and a parallel resonant branch connected across the tertiary winding. The converters require less capacitive components and lend themselves well to miniaturization.

    摘要翻译: 公开了谐振DC / DC转换器。 根据本发明的DC / DC转换器包括桥式逆变器,谐振电路,高频变压器和整流电路。 高频变压器有三级绕组。 谐振电路由连接到变压器初级绕组的串联谐振分支和跨三次绕组连接的并联谐振分支组成。 这些转换器需要较少的电容元件,并适合小型化。

    Digital EMI filter
    5.
    发明授权
    Digital EMI filter 有权
    数字EMI滤波器

    公开(公告)号:US09172299B2

    公开(公告)日:2015-10-27

    申请号:US14112708

    申请日:2012-04-19

    IPC分类号: H02M1/12 H02M1/44

    CPC分类号: H02M1/44 H02M1/12

    摘要: The invention provides a digital active EMI filter that removes, minimizes, or reduces unwanted interference (i.e., EMI noise) generated by a power circuit such as, for example, a power converter. Digital active filtering includes digital sampling of the incident noise signal amplitude and frequency, discrete time conversion of the EMI noise source, processing (e.g., inverting) the digital signal, and then constructing an analog output signal (i.e., an EMI compensation signal) which is injected to the input of the power circuit. A digital EMI filter as described herein may be used in both differential-mode and common-mode configurations, and overcomes limitations of passive and active analog EMI filters.

    摘要翻译: 本发明提供一种数字有源EMI滤波器,其去除,最小化或减少由例如功率转换器的电力电路产生的不需要的干扰(即,EMI噪声)。 数字有源滤波包括入射噪声信号幅度和频率的数字采样,EMI噪声源的离散时间转换,数字信号的处理(例如,反相),然后构建模拟输出信号(即EMI补偿信号),其中 被注入到电源电路的输入端。 这里描述的数字EMI滤波器可以用于差模和共模配置,并克服无源和有源模拟EMI滤波器的限制。

    Adaptive power converter and related circuitry
    6.
    发明授权
    Adaptive power converter and related circuitry 有权
    自适应功率转换器及相关电路

    公开(公告)号:US08184456B1

    公开(公告)日:2012-05-22

    申请号:US12198605

    申请日:2008-08-26

    IPC分类号: H02M3/335

    CPC分类号: H02M5/29

    摘要: A resonant power converter circuit stage can be configured to: i) receive a rectified voltage derived from an AC input voltage; ii) convert the rectified voltage to an internal voltage based on the application of a duty cycle that varies depending on the input voltage and the output dynamic load, and iii) convert the internal voltage to a DC output voltage for driving the dynamic load based on application of a switching frequency that varies depending on a dynamic load. The efficiency of the power converter system can be increased by setting the internal DC voltage magnitude to be load adaptive. Variation of the internal DC voltage depending on the dynamic load enables the resonant converter circuit to operate at a switching frequency near its optimum resonance frequency. This method results in constant power converter system efficiency over a wide range of loading. In order to further increase the light load efficiency interleaved resonant power converters with load, adaptive internal DC voltage are used.

    摘要翻译: 谐振功率转换器电路级可以被配置为:i)接收从AC输入电压导出的整流电压; ii)基于施加根据输入电压和输出动态负载而变化的占空比将整流电压转换为内部电压,以及iii)将内部电压转换为用于驱动动态负载的直流输出电压,基于 应用根据动态负载而变化的开关频率。 通过将内部直流电压幅度设置为负载自适应,可以提高功率转换器系统的效率。 根据动态负载的内部直流电压的变化使得谐振变换器电路能够以接近其最佳谐振频率的开关频率工作。 这种方法在广泛的负载范围内导致恒定的功率转换器系统效率。 为了进一步增加轻载负载效率交流谐振功率转换器的负载,采用自适应内部直流电压。

    Power supply and related circuits

    公开(公告)号:US07592789B2

    公开(公告)日:2009-09-22

    申请号:US11644645

    申请日:2006-12-22

    申请人: Praveen K. Jain

    发明人: Praveen K. Jain

    IPC分类号: G05F1/569

    摘要: A controller circuit in a power supply system is configured to simultaneously control both a voltage regulator circuit and a dynamic power supply circuit. The controller circuit monitors voltage produced by the voltage regulator circuit. The voltage regulator circuit conveys power from a voltage source to a dynamic load such as a microprocessor, whose power consumption can change rapidly change during operation. Depending on a state (e.g., current value, trend, etc.) of the monitored voltage applied to the load by the voltage regulator circuit, the controller circuit can initiate activation of the dynamic power supply circuit in parallel with the voltage regulator circuit to selectively supply additional power to the load. Supplying additional power to the dynamic load during heavy load conditions prevents the regulated voltage supplied to the load from falling below a threshold value.

    POWER SUPPLY AND CONTROLLER CIRCUITS
    8.
    发明申请
    POWER SUPPLY AND CONTROLLER CIRCUITS 有权
    电源和控制器电路

    公开(公告)号:US20080157742A1

    公开(公告)日:2008-07-03

    申请号:US11969655

    申请日:2008-01-04

    IPC分类号: G05F1/00

    CPC分类号: H02M3/1584 H02M2003/1566

    摘要: A power supply system includes multiple power converter phases. A controller (e.g., a processor device, ASIC) monitors an output voltage generated by a combination of multiple power converter phases that supply power to a load. Based on the monitoring, the controller determines: i) a magnitude of an error signal representing a relative difference between the output voltage and a predetermined setpoint value, and ii) a rate-of-change associated with the output voltage. The controller compares the rate-of-change to threshold criteria. In response to detecting that the rate-of-change associated with the output voltage exceeds a threshold value, the controller adjusts a time of turning on of a phase switch (e.g., a power switch configured to convey an input voltage to an inductor that in turn delivers energy to the load) in one or more of the multiple power converter phases depending on the magnitude of the error signal.

    摘要翻译: 电源系统包括多个电源转换器阶段。 控制器(例如,处理器设备,ASIC)监视由向负载供电的多个功率转换器相位的组合产生的输出电压。 基于监视,控制器确定:i)表示输出电压和预定设定值之间的相对差的误差信号的大小,以及ii)与输出电压相关联的变化率。 控制器将变化率与阈值进行比较。 响应于检测到与输出电压相关联的变化率超过阈值,控制器调节相位开关的接通时间(例如,被配置为将输入电压传送到电感器的电源开关的时间) 根据误差信号的大小,在多个功率转换器相中的一个或多个中将负载转换为负载)。

    Constant frequency resonant dc/dc converter
    9.
    发明授权
    Constant frequency resonant dc/dc converter 失效
    恒频谐振直流/直流转换器

    公开(公告)号:US5157593A

    公开(公告)日:1992-10-20

    申请号:US676597

    申请日:1991-03-28

    申请人: Praveen K. Jain

    发明人: Praveen K. Jain

    IPC分类号: H02M3/28 H02M3/337 H02M7/537

    CPC分类号: H02M3/337 Y02B70/1433

    摘要: A constant frequency full resonant mode dc/dc converter is provided, suitable for use in low voltage, high current dc power distribution systems. The converter comprises a full-bridge inverter, a resonant circuit, an output transformer, an output diode rectifier, a dc output filter, and a control circuit. The resonant circuit consists of a series branch and a parallel branch. The components of the resonant circuit are selected such that a sinusoidal voltage waveform is achieved across the parallel branch, and an overall lagging current is obtained at the output of the full-bridge inverter for a desired range of output voltage control and no-load to full-load operating conditions.

    摘要翻译: 提供恒频全谐振模式dc / dc转换器,适用于低电压,大电流直流配电系统。 该转换器包括全桥逆变器,谐振电路,输出变压器,输出二极管整流器,直流输出滤波器和控制电路。 谐振电路由串联支路和并联支路组成。 选择谐振电路的部件,使得跨并联支路实现正弦电压波形,并且在全桥逆变器的输出端获得整体滞后电流,以获得期望的输出电压控制范围和空载到 满载运行条件。

    AC/DC converter using resonant network for high input power factor
    10.
    发明授权
    AC/DC converter using resonant network for high input power factor 失效
    AC / DC转换器采用谐振网络实现高输入功率因数

    公开(公告)号:US4959766A

    公开(公告)日:1990-09-25

    申请号:US376854

    申请日:1989-07-07

    申请人: Praveen K. Jain

    发明人: Praveen K. Jain

    IPC分类号: H02M1/00 H02M1/42

    摘要: An AC/DC converter is provided, suitable for use in an advanced single phase, sine wave voltage, high frequency power distribution system, such as that used on a 20 kHz Space Station Primary Electrical Power Distribution System. The converter comprises a transformer, a resonant network, a current controler, a diode rectifier and an output filter. The voltage source is converted into a sinusoidal current source. The output of this current source is rectified by the diode rectifier and is controlled by the current controller. The controlled rectified current is then filtered by the output filter to obtain a constant voltage across the load.

    摘要翻译: 提供了一个适用于先进的单相,正弦波电压,高频配电系统的AC / DC转换器,例如在20 kHz空间站一次配电系统上使用的。 转换器包括变压器,谐振网络,电流控制器,二极管整流器和输出滤波器。 电压源被转换为正弦电流源。 该电流源的输出由二极管整流器整流,由电流控制器控制。 然后通过输出滤波器对受控整流电流进行滤波,以在负载两端获得恒定电压。