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公开(公告)号：US4390769A
公开(公告)日：1983-06-28
申请号：US154222
申请日：1980-05-29
CPC分类号： H05B6/062
摘要： An improved induction heating apparatus comprises a full bridge inverter with each inverter leg fabricated of first and second serially coupled field effect transistors. A control apparatus coupled to the gate of each field effect transistor of each leg alternately renders the first and second field effect transistors of each inverter leg conductive. By varying the phase delay between initiation of alternate conduction of the field effect transistors of one inverter leg and subsequent initiation of alternate conduction of the field effect transistors of the other inverter legs in response to operator commands, smooth induction heating apparatus power control is achieved.
摘要翻译： 一种改进的感应加热装置包括全桥逆变器，每个逆变器支脚由第一和第二串联耦合的场效应晶体管构成。 耦合到每个支路的每个场效应晶体管的栅极的控制装置交替地使每个反相器的第一和第二场效应晶体管导通。 通过改变一个逆变器支路的场效应晶体管的交替导通的开始之间的相位延迟以及响应于操作者指令的其他逆变器支路的场效应晶体管的随后的交替导通，实现了平滑的感应加热装置功率控制。
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公开(公告)号：US4386394A
公开(公告)日：1983-05-31
申请号：US264750
申请日：1981-05-20
CPC分类号： H02M1/4216 , H02J1/102 , H02M1/4258 , H02M3/33507 , H02J1/108 , H02J2001/104 , H02M2001/4283 , Y02B70/126
摘要： A single phase AC to DC power converter is provided which accepts a single AC line input voltage and provides a DC output voltage. Input current feedback is used to control the converter and to provide high quality sinusoidal line currents in phase with the applied line voltage. In another embodiment, a three phase AC to DC converter is realized as a delta connection of three isolated single phase AC to DC converters. Reduction in peak transistor currents of the switching transistor in each single phase converter is accomplished by the introduction of third harmonics to each of the single phase AC to DC power converters. Each of the three single phase AC to DC converters are synchronized so that the current pulses at the outputs of the three AC to DC converters are staggered in time reducing the amount of filtering required at the load.
摘要翻译： 提供单相AC至DC功率转换器，其接受单个AC线路输入电压并提供DC输出电压。 输入电流反馈用于控制转换器，并提供与施加的线路电压同相的高质量正弦线电流。 在另一个实施例中，三相AC至DC转换器被实现为三个隔离单相AC至DC转换器的三角形连接。 每个单相转换器中的开关晶体管的峰值晶体管电流的减小是通过向每个单相AC到DC电力转换器引入三次谐波来实现的。 三个单相AC到DC转换器中的每一个被同步，使得三个AC到DC转换器的输出处的电流脉冲在时间上交错，减少了负载所需的滤波量。
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公开(公告)号：US4346431A
公开(公告)日：1982-08-24
申请号：US224599
申请日：1981-01-12
CPC分类号： H02M3/135
摘要： A field controlled thyristor or a field terminated diode is used in a gate assisted turn off mode in a resonant circuit commutated switching dc/dc converter to convert power from one voltage level to another voltage level. A diode allows energy trapped in stray inductances to be delivered directly to the load rather than be dissipated in snubber resistors.
摘要翻译： 在谐振电路换向开关dc / dc转换器中的栅极辅助关断模式中使用场控晶闸管或场终端二极管，以将功率从一个电压电平转换到另一个电压电平。 二极管使杂散电感中捕获的能量直接传递到负载，而不是在缓冲电阻中消散。
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公开(公告)号：US4253054A
公开(公告)日：1981-02-24
申请号：US009305
申请日：1979-02-05
CPC分类号： H02J7/027 , H02J7/0093 , H02J7/022 , Y02B40/90 , Y10S320/24
摘要： An improved battery charger circuit for rapidly charing a battery by increasing the rate of battery charge acceptance through periodic battery discharge during the charging process includes a pair of first and second controlled rectifier circuits coupled to an AC source and adapted for coupling to a battery. The first controlled rectifier circuit is rendered conductive during the charging intervals to supply the battery with charge current from the AC source. The second controlled rectifier circuit is rendered conductive during battery discharge intervals to discharge the battery in a substantially lossless manner by conducting battery discharge current through the AC source, thus realizing a highly efficient battery charger.
摘要翻译： 一种改进的电池充电器电路，用于通过在充电过程中通过周期性电池放电来增加电池充电接受率来快速烧结电池，包括耦合到AC源并适于耦合到电池的一对第一和第二受控整流器电路。 在充电间隔期间，第一受控整流电路导通，以向AC电池提供充电电流。 第二受控整流电路在电池放电间隔期间变为导电，以通过通过AC电源进行电池放电电流以基本无损的方式对电池进行放电，从而实现高效率的电池充电器。
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公开(公告)号：US4241250A
公开(公告)日：1980-12-23
申请号：US51719
申请日：1979-06-25
摘要： An induction cooking system comprises at least one induction surface unit which includes an induction coil operatively positioned adjacent to a metallic, food-containing utensil. A switching means is coupled in series with the coil across a source of rectified AC and is rendered conductive at a prescribed rate to energize the coil, causing the coil to generate magnetic flux which, in turn, causes eddy currents to be circulated in the utensil surface. The circulating eddy currents in the utensil surface result in joule losses causing food heating. Reactive energy present in the induction coil during intervals when the switching means is non-conductive is stored in a reactive power converter for subsequent discharge across the source of rectified AC. Selectively discharging the reactive power converter during the valleys of the AC input wave to the induction coil allows the coil to be energized during the entire 360.degree. of the AC input wave, thus realizing an efficient induction cooking system.
摘要翻译： 感应烹调系统包括至少一个感应表面单元，该感应表面单元包括可操作地定位成邻近金属食物的器具的感应线圈。 开关装置与整流的AC的线圈串联耦合，并以规定的速率被导通以对线圈通电，从而使线圈产生磁通量，这又导致涡流在器具中循环 表面。 器具表面的循环涡流导致焦耳损失导致食物加热。 在开关装置不导通的间隔期间，存在于感应线圈中的无功能量被存储在无功功率转换器中，用于随后的整流AC源放电。 在交流输入波谷期间将无功功率转换器选择性地放电到感应线圈，可以使线圈在交流输入波的整个360°范围内通电，从而实现高效的感应烹饪系统。
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