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1.发明授权Metal base cookware induction heating apparatus having improved power control circuit for insuring safe operation 失效金属炊具感应加热装置具有改进的功率控制电路，用于确保安全操作
公开(公告)号：US4151387A
公开(公告)日：1979-04-24
申请号：US520117
申请日：1974-11-01
IPC分类号： F24C7/02 , G01J5/04 , G05D23/19 , G05D23/24 , G05D23/27 , G05F1/56 , H02M1/08 , H02M3/135 , H02M5/45 , H02M7/515 , H02M7/525 , H05B6/02 , H05B6/06 , H05B6/12 , H05B5/04
CPC分类号： H05B6/062 , F24C7/02 , G05D23/19 , G05D23/1917 , G05D23/24 , G05D23/27 , G05F1/56 , H02M1/083 , H02M3/135 , H02M5/45 , H02M7/515 , H02M7/525 , H05B6/1263 , H05B2206/022
摘要： A metal based cookware induction heating apparatus having an improved power supply and control circuit comprised of a chopper inverter including a gate controlled power thyristor coupled to and supplying an induction heating coil with periodic energization currents. A full wave rectifier supplies rectified, unfiltered, unidirectional high voltage excitation potential to the chopper inverter which converts the excitation potential to a comparatively high frequency of the order of 20 kilohertz for supply to the induction heating coil. A gating circuit is provided for driving the chopper inverter directly from the rectified high voltage excitation potential supplied by the rectifier.
摘要翻译： 一种金属炊具感应加热装置，具有改进的电源和控制电路，该电源和控制电路由斩波逆变器组成，该斩波逆变器包括耦合到感应加热线圈并向其提供周期性通电电流的栅极控制功率晶闸管。 全波整流器向斩波逆变器提供整流，未滤波的单向高电压激励电位，将激励电位转换为20千赫兹数量级的较高频率，供给感应加热线圈。 提供一种选通电路，用于直接从整流器提供的整流高压励磁电位驱动斩波逆变器。
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2.发明授权Induction cooking unit having cooking load sensing device and essentially zero stand-by power loss 失效具有烹饪负载感应装置的诱导烹饪单元和基本的零点电力损失
公开(公告)号：US4013859A
公开(公告)日：1977-03-22
申请号：US583662
申请日：1975-06-04
CPC分类号： H05B6/062
摘要： An induction heating unit is provided having an essentially zero stand-by power requirement and comprised by a high power solid-state inverter for supplying relatively high frequency excitation currents to an induction heating coil, and including inhibit, delay, and starting and stopping gating circuits to control the operation of the high frequency power inverter. An induction heating load sensing device senses the presence of a load such as a pan or other metal base cookware located in induction heating relationship with respect to the induction heating coil. The pan presence sensing device comprises a very low power oscillator coupled to a load sensing coil for exciting the load sensing coil with high frequency oscillatory signals which preferably are in the range of two to three times the frequency at which the power inverter operates. The load sensing coil is physically positioned adjacent the induction heating coil in a location to provide inductive coupling of the high frequency sensing signal to a pan load suitably supported near the induction heating coil. The pan load sensing coil is designed to minimize the effect of inductive coupling to the induction heating coil, and for this purpose is provided with a multiple loop figure-eight or cloverleaf shape so designed and positioned that currents induced in the loops of the sensing coil by the magnetic field of the induction heating coil null one another at the terminals of the sensing coil. A load sensing detector responds to the magnitude of the high frequency voltage across the pan load sensing coil and controls the operation of the gating circuits of the power inverter in a load-selective manner to cause turn-on of the power inverter only in the presence of a proper pan load.
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公开(公告)号：US3958148A
公开(公告)日：1976-05-18
申请号：US303725
申请日：1952-08-11
CPC分类号： H01J25/56
摘要： 1. A magnetron discharge device for noise generation comprising an elongated cathode, a plurality of spaced anode segments surrounding said cathode to define a cylindrical space charge chamber, and means for establishing a radial electric field between said cathode and said anode segments for imparting an average rotational velocity about the cathode to an electronic space charge when a magnetic field is axially directed through the space charge chamber, said spaced segments and the gaps between them differing in relative widths whereby electrons traveling under different segments and gaps have different transit times.
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公开(公告)号：US3953783A
公开(公告)日：1976-04-27
申请号：US454787
申请日：1974-03-26
IPC分类号： F24C7/02 , G01J5/04 , G05D23/19 , G05D23/24 , G05D23/27 , G05F1/56 , H02M1/08 , H02M3/135 , H02M5/45 , H02M7/515 , H02M7/525 , H05B6/02 , H05B6/06 , H05B6/12
CPC分类号： H05B6/062 , F24C7/02 , G05D23/19 , G05D23/1917 , G05D23/24 , G05D23/27 , G05F1/56 , H02M1/083 , H02M3/135 , H02M5/45 , H02M7/515 , H02M7/525 , H05B6/1254 , H05B2206/022 , Y02B40/126
摘要： A metal based cookware induction heating apparatus having an improved power supply and control circuit comprised of a chopper inverter including a gate controlled power thyristor coupled to and supplying an induction heating coil with periodic energization currents. A full wave rectifier supplies rectified, unfiltered, unidirectional high voltage excitation potential to the chopper inverter which converts the excitation potential to a comparatively high frequency of the order of 20 kilohertz for supply to the induction heating coil. A gating circuit is provided for driving the chopper inverter directly from the rectified high voltage excitation potential supplied by the rectifier.The gating circuit includes an additional low voltage, direct current excitation potential connected to supply to a timing circuit charging capacitor. A voltage responsive switch such as a SUS or PUT or their equivalents is rendered conductive upon the timing circuit reaching a present value and in turn rendered conductive a constant current high voltage switching transistor connected in series with the primary winding of a pulse transformer across the output of the additional low voltage derived from the main full wave rectifier. The pulse transformer in turn has its secondary winding connected to the control gate of the power thyristor included in the chopper inverter.
摘要翻译： 一种金属炊具感应加热装置，具有改进的电源和控制电路，该电源和控制电路由斩波逆变器组成，该斩波逆变器包括耦合到感应加热线圈并向其提供周期性通电电流的栅极控制功率晶闸管。 全波整流器向斩波逆变器提供整流，未滤波的单向高电压激励电位，将激励电位转换为20千赫兹数量级的较高频率，供给感应加热线圈。 提供一种选通电路，用于直接从整流器提供的整流高压励磁电位驱动斩波逆变器。
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公开(公告)号：US3944872A
公开(公告)日：1976-03-16
申请号：US303726
申请日：1952-08-11
摘要： 1. A magnetron discharge device for noise generation comprising an elongated cathode and a plurality of anode segments surrounding said cathode to define a cylindrical space charge chamber, said cathode comprising a helix having a diameter equal to at least half the space charge chamber diameter and having a spacing between adjacent turns equal to at least half the helix diameter.
摘要翻译： 1.一种用于产生噪声的磁控管放电装置，包括细长阴极和围绕所述阴极的多个阳极段，以限定圆柱形空间电荷室，所述阴极包括直径等于空间电荷室直径的至少一半的螺旋线，并且具有 相邻匝之间的间距等于螺旋直径的至少一半。
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6.发明授权Integral crystal-controlled line-voltage ballast for compact RF fluorescent lamps 失效用于紧凑型射频荧光灯的整体晶体控制线路电压镇流器
公开(公告)号：US4631449A
公开(公告)日：1986-12-23
申请号：US638166
申请日：1984-08-06
CPC分类号： H05B41/2806 , Y02B20/22
摘要： A ballast circuit for a fluorescent lamp including a rectifier-filter for coupling to an AC power supply to generate a DC voltage, an oscillator circuit coupled to said DC voltage for developing an RF oscillator signal, and switching signal means for developing concurrent oppositely phased switching signals at the frequency of said oscillator signal to drive series connected power transistors. The common output of the power transistors is coupled to energize a fluorescent lamp coil and regenerative feedback means for generating a signal to aid in switching the power transistors.
摘要翻译： 一种用于荧光灯的镇流器电路，其包括用于耦合到AC电源以产生DC电压的整流滤波器，耦合到所述DC电压的振荡器电路用于开发RF振荡器信号，以及用于开发同步相位切换的切换信号装置 信号以所述振荡器信号的频率驱动串联连接的功率晶体管。 功率晶体管的公共输出被耦合以激励荧光灯线圈和再生反馈装置，用于产生信号以帮助切换功率晶体管。
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公开(公告)号：US4149167A
公开(公告)日：1979-04-10
申请号：US492327
申请日：1955-03-04
CPC分类号： G01S7/38
摘要： 1. An automatic radar jamming transmitter comprising a plurality of voltatuned magnetrons each adapted to be tuned over a prescribed wide range of frequencies, discrete voltage tuning means in circuit with each of said magnetrons respectively whereby each of said magnetrons initially and simultaneously generate radio-frequency energy at prescribed discrete frequencies, means for simultaneously varying said discrete voltage tuning means in a random manner whereby the discrete outputs of said magnetrons comprise simultaneously generated frequency modulated noise signals, means for amplifying said noise signals, and means in circuit with said amplifying means for producing random changes in the amplitudes of said noise signals.
摘要翻译： 1.一种自动雷达干扰发射机，包括多个电压调谐磁控管，每个磁控管适于在规定的宽频率范围内调谐，分别与每个所述磁控管电路分离电压调谐装置，每个磁控管最初并同时产生无线电 以规定的离散频率的频率能量的装置，用于以随机方式同时改变所述离散电压调谐装置的装置，由此所述磁控管的离散输出包括同时产生的调频噪声信号，用于放大所述噪声信号的装置，以及具有所述放大 用于产生所述噪声信号幅度随机变化的装置。
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公开(公告)号：US4068235A
公开(公告)日：1978-01-10
申请号：US490702
申请日：1955-02-25
CPC分类号： G01S13/24
摘要： 1. A frequency diversity radar transmission system comprising a source of curring periodic pulses, a magnetron type oscillator adapted to be voltage tuned for generating continuous waves of radio-frequency energy, means responsive to said pulses for voltage tuning said magnetron whereby the continuous wave output frequency of the magnetron is instantaneously shifted to successive discrete frequencies by successive pulses and the respective discrete frequencies are maintained constant for the period between any two successive pulses, a transmitting antenna, wideband amplifier means driven by the output of said magnetron and having its output coupled to said antenna, and means for periodically energizing said amplifier immediately after each of said successive shifts in frequency whereby radio-frequency pulse energy is coupled through said amplifier to said transmitting antenna only for a relatively small fraction of the period of said recurring pulses, each of the transmitted pulses comprising discrete frequencies.
摘要翻译： 1.一种包括循环周期脉冲源的频率分集雷达传输系统，适于被电压调谐以产生无线电频率能量的连续波的磁控管型振荡器，响应于所述脉冲用于电压调谐所述磁控管的装置，由此连续波输出 磁控管的频率通过连续的脉冲瞬间移动到连续的离散频率，并且相应的离散频率在任何两个连续脉冲之间的周期保持恒定，发射天线，宽带放大器装置由所述磁控管的输出驱动，并且其输出耦合 到所述天线，以及用于在频率的每一个之后立即周期性地激励所述放大器的装置，其中射频脉冲能量通过所述放大器仅耦合到所述发射天线，仅在所述重复脉冲的周期的相对较小的一部分中， 的发射脉冲c 令人惊奇的离散频率。
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9.发明授权Induction cooking unit having all pan safe operation, wide range power control and low start-up and shut-down transients 失效感应烹饪单元具有全面的安全操作，广泛的功率控制和低启动和关闭瞬变
公开(公告)号：US3932801A
公开(公告)日：1976-01-13
申请号：US505133
申请日：1974-09-11
摘要： An induction heating unit including inverter circuit means comprised by a gate controlled thyristor and commutation circuit coupled together in circuit relationship and excited from a set of power supply terminals connected to a source of excitation potential. An induction heating coil is coupled to and excited by the inverter circuit means in a manner such that the loading on the induction heating coil determines at least in part the operating frequency at which the inverter circuit means operates. Gating circuit means comprised by a gating signal generator and enabling circuit means are coupled to and control turn-on of the gate control thyristor with the gating circuit means comprising a feedback sensing circuit coupled to the induction heating coil for deriving a feedback trigger signal synchronized with the frequency of operation of the commutation circuit.
摘要翻译： 一种感应加热单元，包括由栅极控制的晶闸管和换向电路组成的反相器电路装置，所述转换电路以电路关系耦合在一起，并从连接到激励电位源的一组电源端子激励。 感应加热线圈以这样的方式耦合到逆变器电路装置并被其激励，使得感应加热线圈上的负载至少部分地确定逆变器电路装置工作的工作频率。 由门控信号发生器和使能电路装置组成的门电路装置与门控电路装置相连接并控制栅极控制晶闸管的导通，该选通电路装置包括耦合到感应加热线圈的反馈感测电路，用于导出与 换向电路的工作频率。
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