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1. 发明授权

US06556462B1 High power factor converter with a boost circuit having continuous/discontinuous modes 有权
标题翻译：具有连续/不连续模式的升压电路的高功率因数转换器
公开(公告)号：US06556462B1
公开(公告)日：2003-04-29
申请号：US10064278
申请日：2002-06-28
申请人： Robert Louis Steigerwald , Vinod John , Milan Zarko Ilic
发明人： Robert Louis Steigerwald , Vinod John , Milan Zarko Ilic
IPC分类号： H02M7217
CPC分类号： H02M1/4208 , H02M5/458 , H02M2001/007 , Y02B70/126 , Y02P80/112
摘要： A high power factor converter system comprises an input rectifier, a converter and a booster circuit. The input rectifier is configured for rectifying an input ac voltage. The converter is configured for generating an output voltage for the high power factor converter system. The converter comprises several converter switches and inverse parallel diodes. The booster circuit comprises an inductor and at least one converter switch and an inverse parallel diode of the converter. The inductor is coupled between the input rectifier and the converter. The booster circuit is configured for controlling the supply of a booster current through the inductor to be discontinuous when the instantaneous voltage level is less than a predetermined fraction of a dc voltage level across the converter and continuous when the instantaneous voltage level is greater than the predetermined fraction of the dc voltage level.
摘要翻译：高功率因数转换器系统包括输入整流器，转换器和升压电路。输入整流器配置为整流输入交流电压。转换器被配置为产生用于高功率因数转换器系统的输出电压。该转换器包括多个转换器开关和反并联二极管。升压电路包括电感器和转换器的至少一个转换器开关和逆并联二极管。电感器耦合在输入整流器和转换器之间。升压电路被配置为当瞬时电压电平小于转换器上的直流电压电平的预定分数时，控制通过电感器的升压电流不连续的供应，并且当瞬时电压电平大于预定值时连续直流电压电平的分数。

2. 发明授权

US6021051A Power converter with crowbar circuit and control for very fast output voltage turn-off 失效
标题翻译：电源转换器具有撬棒电路和控制非常快的输出电压关断
公开(公告)号：US6021051A
公开(公告)日：2000-02-01
申请号：US222354
申请日：1998-12-29
申请人： Laszlo Laskai , Milan Zarko Ilic
发明人： Laszlo Laskai , Milan Zarko Ilic
IPC分类号： H02M3/335
CPC分类号： H02M3/33507
摘要： A forward converter, having a single switching device, is coupled through an isolation transformer to a crowbar circuit and an output capacitor for controlling the isolated output voltage turn-off. The crowbar circuit, including a trigger device and a resistor, is coupled between the transformer and the output capacitor. The conduction times of the converter switching device are controlled to regulate the energy stored in the transformer and to generate a reverse voltage having a predetermined amplitude. During the output voltage-on mode, the amplitude of the reverse voltage swing is controlled to be sufficiently low such that the converter operates as a conventional forward converter. For output voltage turn-off, the conduction time of the switching device is controlled to obtain a voltage swing of sufficient magnitude to trigger the crowbar circuit, and thus rapidly discharge the output capacitor.
摘要翻译：具有单个开关器件的正向转换器通过隔离变压器耦合到短路电路和用于控制隔离的输出电压关断的输出电容器。包括触发装置和电阻器的短路电路耦合在变压器和输出电容器之间。控制转换器开关器件的导通时间以调节存储在变压器中的能量并产生具有预定幅度的反向电压。在输出电压接通模式期间，反向电压摆幅的幅度被控制为足够低，使得转换器作为常规的正向转换器工作。对于输出电压关断，控制开关器件的导通时间以获得足够大的电压摆幅以触发短路电路，从而快速放电输出电容器。

3. 发明授权

US06473284B1 Low-power dc-to-dc converter having high overvoltage protection 失效
标题翻译：具有高过压保护功能的低功率DC-DC转换器
公开(公告)号：US06473284B1
公开(公告)日：2002-10-29
申请号：US09657633
申请日：2000-09-06
申请人： Milan Zarko Ilic , Warren Ralph Germer , Richard Alan Balch
发明人： Milan Zarko Ilic , Warren Ralph Germer , Richard Alan Balch
IPC分类号： H02H320
CPC分类号： H02M1/32 , H02H7/1213 , H02M3/155
摘要： A dc-to-dc converter is provided with overvoltage protection circuitry while still providing normal output voltage. Such overvoltage protection circuitry does not require resetting. The overvoltage protection circuitry includes a first switching device connected between the input bridge and a dc output voltage bus and further includes an overvoltage current path. The overvoltage current path includes a complementary switching device in series with Zener diode circuitry having a predetermined breakdown voltage, and further has a transition current path. The first switching device is closed for nominal input voltage and is open for overvoltages. When the input voltage exceeds the Zener diode breakdown voltage, the transition current path conducts current. When the threshold voltage of the complementary switching device is exceeded, the complementary switching device turns on and conducts current through the overvoltage current path. After the overvoltage transient condition subsides and the input voltage decreases back to the nominal range, the complementary switching device turns off, and normal converter operation resumes.
摘要翻译： DC-DC转换器提供过压保护电路，同时仍然提供正常的输出电压。这种过电压保护电路不需要复位。过电压保护电路包括连接在输入桥和直流输出电压母线之间的第一开关装置，并且还包括过压电流路径。过电压电流路径包括与具有预定击穿电压的齐纳二极管电路串联的互补开关器件，并且还具有转换电流通路。第一个开关器件为标称输入电压闭合，并且过电压开路。当输入电压超过齐纳二极管击穿电压时，转换电流路径导通电流。当超过互补开关器件的阈值电压时，互补开关器件导通，并通过过压电流通路导通电流。过电压瞬变状态消失，输入电压降低到标称范围后，互补开关器件关闭，恢复正常的转换器工作。

4. 发明授权

US06181580B2 Single-supply gridding and biasing circuitry 失效
标题翻译：单电源网路和偏置电路
公开(公告)号：US06181580B2
公开(公告)日：2001-01-30
申请号：US09578092
申请日：2000-05-25
申请人： Laszlo Laskai , Milan Zarko Ilic
发明人： Laszlo Laskai , Milan Zarko Ilic
IPC分类号： H02M3335
CPC分类号： H02M3/28 , H02M1/10 , H05G1/10
摘要： A single power supply circuit, including a push-pull input converter stage and a voltage-controlled latch circuit output stage isolated from each other by a transformer, provides both voltage gridding and biasing functions in, for example, an x-ray tube application. In the gridding mode, a first voltage level supplies the push-pull converter to provide an output voltage that is sufficiently high to trigger the voltage-controlled latch circuit and thereby provide grid control via a grid control electrode. In the biasing mode, a lower voltage level supplies the push-pull converter such that the output voltage is insufficient to trigger the voltage-controlled latch circuit. As a result, a resistive voltage divider provides a predetermined biasing voltage on a bias control electrode.
摘要翻译：包括推挽输入转换器级和由变压器彼此隔离的电压控制的锁存电路输出级的单个电源电路在例如x射线管应用中提供电压网格化和偏置功能。在网格化模式中，第一电压电平提供推挽转换器以提供足够高的输出电压以触发电压控制的锁存电路，从而通过电网控制电极提供电网控制。在偏置模式中，较低的电压电平提供推挽转换器，使得输出电压不足以触发电压控制的锁存电路。结果，电阻分压器在偏置控制电极上提供预定的偏置电压。

5. 发明授权

US5969955A Push-pull power converter with crowbar circuit for very fast output voltage turn-off 有权
标题翻译：推挽式电源转换器，具有非常快的输出电压关断功能
公开(公告)号：US5969955A
公开(公告)日：1999-10-19
申请号：US222353
申请日：1998-12-29
申请人： Laszlo Laskai , Milan Zarko Ilic
发明人： Laszlo Laskai , Milan Zarko Ilic
IPC分类号： H02M3/337 , H02M3/335
CPC分类号： H02M3/337
摘要： A forward converter useful in a power supply utilizing an isolation transformer includes a crowbar circuit and control such that turn-off by discharging an output capacitor is made advantageously faster than conventional circuits. The forward converter has a push-pull arrangement of two switching devices. For operation in the output voltage-on mode, the forward converter transfers energy in a peak forward converter mode with the first switching device being turned on and off. For output voltage turn-off, the crowbar circuit is activated by turning on the second switching device which results in a reverse voltage at the secondary winding of the isolation transformer. The reverse voltage is superimposed on the converter output voltage, the sum of the converter output voltage and the reverse voltage being imposed across the crowbar circuit. If the sum of the converter output voltage and the reverse voltage exceeds the breakover voltage of the crowbar circuit, the output capacitor discharges rapidly through the crowbar circuit and the transformer secondary winding.
摘要翻译：用于利用隔离变压器的电源中的正激转换器包括短路电路和控制，使得通过放电输出电容器的关断有利地比常规电路更快。正向转换器具有两个开关器件的推挽布置。为了在输出电压开启模式下工作，正向转换器以峰值正向转换器模式传输能量，其中第一开关装置被接通和断开。对于输出电压关断，通过打开第二个开关器件来激活短路电路，从而导致隔离变压器的次级绕组产生反向电压。反向电压叠加在转换器输出电压上，转换器输出电压和反向电压之和施加在短路电路上。如果转换器输出电压和反向电压的总和超过了撬棒电路的跳变电压，则输出电容通过短路电路和变压器次级绕组迅速放电。

6. 发明授权

US06509724B1 Housekeeping power supply for electronically controlled loads 失效
标题翻译：电控负载的家用电源
公开(公告)号：US06509724B1
公开(公告)日：2003-01-21
申请号：US09698794
申请日：2000-10-27
申请人： Milan Zarko Ilic , Frank Jakob John Mueller
发明人： Milan Zarko Ilic , Frank Jakob John Mueller
IPC分类号： G05F140
CPC分类号： H05B41/3924 , H05B41/2853 , H05B41/2983
摘要： A circuit for loading the rectified AC voltage bus in a housekeeping power supply for an electronically controlled load is provided for avoiding large increases in the rectified AC bus voltage upon disconnecting the load. The load circuit includes a current sink, a relatively small energy storage capacitance, and a negative feedback circuit. The current sink includes a resistance coupled to the rectified AC voltage bus for sinking current whenever the semiconductor switch is on. When the semiconductor switch is off, the small capacitance discharges through the resistive voltage divider. When the voltage across the small capacitance decreases to a threshold mean AC rectified voltage bus value, then the negative feedback circuit provides sufficient current to turn the semiconductor switch back on and thus provide approximately the threshold mean AC rectified voltage bus value. Diodes are provided on the AC rectified voltage bus in order to ensure fast feedback and to separate the current sink resistance from the remainder of the housekeeping supply during normal circuit operation.
摘要翻译：提供了用于将整流的AC电压总线加载到用于电子控制负载的管理电源中的电路，用于避免在断开负载时整流的AC总线电压的大幅增加。负载电路包括电流吸收器，相对较小的储能电容和负反馈电路。电流吸收器包括耦合到整流的AC电压总线的电阻，用于每当半导体开关导通时吸收电流。当半导体开关关闭时，小电容通过电阻分压器放电。当小电容两端的电压降低到阈值平均值AC整流电压总线值时，负反馈电路提供足够的电流来使半导体开关重新导通，从而提供大致阈值平均AC整流电压总线值。在交流整流电压总线上提供二极管，以确保在正常电路运行期间快速反馈并将电流吸收电阻与余下的电源分离。

7. 发明授权

US06275391B1 Compact push-pull converter and crowbar circuit, and control therefor 失效
标题翻译：紧凑型推挽转换器和撬棒电路，并进行控制
公开(公告)号：US06275391B1
公开(公告)日：2001-08-14
申请号：US09615832
申请日：2000-07-13
申请人： Laszlo Laskai , Milan Zarko Ilic
发明人： Laszlo Laskai , Milan Zarko Ilic
IPC分类号： H02M3335
CPC分类号： H02M3/3372 , H02M2001/322 , Y02B70/1433
摘要： A push-pull converter, coupled through an isolation transformer to a crowbar circuit for controlling an isolated output voltage across an output capacitor, has a compact circuit arrangement with a minimal number of components. The switching devices of the push-pull converter have integrated, ultra-fast anti-parallel diodes. The crowbar circuit is a voltage-controlled bi-directional switch coupled between the transformer and the output capacitor. The converter is controlled in an output-voltage-on mode by turning on and off the first switching device, and in an output-voltage-off mode by applying a gating signal to the second switching device sufficient to both activate the crowbar circuit and discharge the output capacitor for very fast isolated output voltage turn-off. In addition, a primary-side circuit comprising a switch and a resistance can be used to avoid excessive residual output voltage build-up.
摘要翻译：通过隔离变压器耦合到用于控制输出电容器两端的隔离输出电压的短路电路的推挽转换器具有最小数量的部件的紧凑的电路装置。推挽转换器的开关器件具有集成的超快速反并联二极管。短路电路是连接在变压器和输出电容器之间的电压双向开关。转换器通过接通和关闭第一开关器件而在输出电压接通模式下被控制，并且在输出电压关闭模式下，通过向第二开关器件施加门控信号，足以使得激活电源线和放电输出电容用于非常快的隔离输出电压关断。此外，可以使用包括开关和电阻的初级侧电路来避免过剩的剩余输出电压积聚。

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