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1.发明授权Circuit for detecting a utensil load placed asymmetrically relative to an induction heating coil 失效用于检测相对于感应加热线圈非对称放置的器具负载的电路
公开(公告)号：US4447691A
公开(公告)日：1984-05-08
申请号：US173802
申请日：1980-07-30
申请人： Takumi Mizukawa , Keizo Amagami , Takao Kobayashi
发明人： Takumi Mizukawa , Keizo Amagami , Takao Kobayashi
CPC分类号： H05B6/062 , H05B6/1254 , Y02B40/126 , Y10S99/14
摘要： A plurality of magnetic field sensors are mounted adjacent the periphery of an induction heating coil of flat, spiral configuration which is energized by ultrasonic frequency energy to generate a time-varying magnetic field. The magnetic field sensors are connected in a ciruit to produce an output signal when a magnetic utensil load is placed asymmetrically with respect to the center of the induction heating coil. In response to sensor output exceeding a predetermined value a warning indication is provided. The ultrasonic energy level is reduced in response to the warning indication to minimize radio interference which would otherwise occur due to leakage magnetic flux.
摘要翻译： 多个磁场传感器安装在平面螺旋结构的感应加热线圈的周边附近，该感应加热线圈由超声频率能量激发以产生时变磁场。 当磁性器具负载相对于感应加热线圈的中心非对称地放置时，磁场传感器以电路连接以产生输出信号。 响应于超过预定值的传感器输出，提供警告指示。 超声波能量响应于警告指示而减小，以最小化否则由于漏磁通而发生的无线电干扰。
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公开(公告)号：US4016392A
公开(公告)日：1977-04-05
申请号：US544845
申请日：1975-01-28
申请人： Takao Kobayashi , Keizo Amagami , Takumi Mizukawa , Tadao Toyooka
发明人： Takao Kobayashi , Keizo Amagami , Takumi Mizukawa , Tadao Toyooka
CPC分类号： H05B6/062 , H05B3/683 , H05B2213/05
摘要： Electromagnetic coupling between a pan or utensil load to be heated by magnetic induction and a source of high frequency magnetic flux is sensed by detecting a current which is indicative of the electromagnetic coupling by means of a current transformer. The detected current is compared with a reference level. Intermittent generation of the magnetic flux is commenced when, for example, a small magnetic metal object is inadvertently placed as a load with the result that the detected current becomes lower than the reference level. This allows intermittent check for the presence and absence of the inadvertently placed load for subsequent cooking operations and minimization of the heat generated therein.
摘要翻译： 通过检测通过电流互感器指示电磁耦合的电流来感测通过磁感应加热的锅或器具负载与高频磁通源之间的电磁耦合。 将检测到的电流与参考电平进行比较。 当例如小的磁性金属物体被无意地放置为负载时，开始磁通的间歇产生，结果检测到的电流变得低于参考电平。 这允许对随后的烹饪操作的无意放置的负载的存在和不存在进行间歇检查并且最小化其中产生的热量。
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3.发明授权
公开(公告)号：US4074101A
公开(公告)日：1978-02-14
申请号：US657307
申请日：1976-02-11
IPC分类号： H05B6/12 , H01F30/00 , H02M5/22 , H02M5/27 , H03B9/10 , H05B6/06 , H05B6/10 , H05B6/68 , H05B5/04
CPC分类号： H05B6/1209 , H02M5/22 , H02M5/27 , H03B9/10 , H05B6/062 , H05B6/6488 , Y02B40/123 , Y10S55/36
摘要： An induction heating apparatus comprising a pair of inversely parallel-connected gate-controlled switching devices connected to an alternating current source, a resonant circuit including an induction heating coil and a variable frequency gating circuit for firing the switching devices to generate oscillations through the conducting device and the induction heating coil. The switching devices are gated into conduction in succession in a first order during the positive half cycle of the alternating current and in a reversed order during the negative half cycle. A zero crosspoint detector is provided to inhibit gating when the source voltage is near zero crosspoint level and to control the gating frequency in accordance with the instantaneous value of the source voltage to increase the turn-off time of the switching devices for lower input source voltage.
摘要翻译： 一种感应加热装置，包括连接到交流电源的一对逆并联的门控开关装置，包括感应加热线圈的谐振电路和用于点火开关装置以产生通过导电装置的振荡的可变频率选通电路 和感应加热线圈。 开关器件在交流电的正半周期期间以一级顺序被选通导通，并且在负半周期期间以相反的顺序被选通。 提供零交叉点检测器以在源电压接近零交叉点电平时禁止门控，并根据源电压的瞬时值来控制门控频率，以增加用于较低输入电源电压的开关器件的关断时间 。
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公开(公告)号：US4446350A
公开(公告)日：1984-05-01
申请号：US272032
申请日：1981-06-09
申请人： Takumi Mizukawa , Keizo Amagami , Yoshio Ogino
发明人： Takumi Mizukawa , Keizo Amagami , Yoshio Ogino
CPC分类号： H05B6/062
摘要： An induction heating cooking apparatus includes a pan supporting plate made of a flat sheet of a heat-resistant dielectric material, a heating coil for induction heating disposed below the pan supporting plate, and touch pads each constituting a capacitor-pair formed by first, second and third electrodes. The touch pads when including three pads respectively serves for turning on a power supply, for turning off the power supply, and for setting a power level to a predetermined level. The induction heating or the supply of the power is permitted to take place only when the touch pad is first touched and followed by touching the touch pad. The first electrodes of the touch pads are provided on the upper surface of the pan supporting plate, and are enclosed by guard rings of a conductive material to prevent erroneous operation.
摘要翻译： 感应加热烹饪设备包括由耐热介电材料的平板制成的平底锅支撑板，设置在平底锅支撑板下方的用于感应加热的加热线圈，以及各自构成由第一，第二 和第三电极。 当包括三个焊盘时，触摸板分别用于打开电源，关闭电源以及将功率电平设置到预定水平。 感应加热或电源供应仅在首先触摸触摸板并随后触摸触摸板时才能进行。 触摸板的第一电极设置在盘支撑板的上表面上，并被导电材料的保护环包围，以防止错误操作。
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5.发明授权
公开(公告)号：US4317975A
公开(公告)日：1982-03-02
申请号：US972881
申请日：1978-12-26
摘要： Induction heating apparatus using gate-controlled switching devices includes a zero crossing point detector for detecting the occurrence of each zero crossing point of high frequency energization current, and a timing circuit which provides timing action in response to the detected zero crossing point. The timing action is controlled by a power control circuit which detects the level of energy delivered to a load within a range from the inherent turn-off time of the gate-controlled switching devices to a desired value.
摘要翻译： 使用栅极控制开关器件的感应加热装置包括用于检测高频通电电流的每个过零点的出现的过零点检测器，以及响应于检测到的过零点提供定时动作的定时电路。 定时动作由功率控制电路控制，功率控制电路检测在从门控开关装置的固有关断时间到期望值的范围内传送到负载的能量的水平。
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6.发明授权
公开(公告)号：US4147910A
公开(公告)日：1979-04-03
申请号：US803968
申请日：1977-06-06
CPC分类号： G05F1/455
摘要： In an induction heating cooking apparatus, the frequency of electromagnetic energy is varied in response to a desired power setting level within an allowable range and the duty cycle of the energy is varied in response to the setting level while the frequency is set at the lower limit of the allowable range. The combined effects of frequency and duty cycle controls permit the power to vary from as low as 50 watts to as high as 2 kilowatts.
摘要翻译： 在感应加热烹调设备中，电磁能的频率响应期望的功率设定水平而变化，并且能量的占空比响应设定水平而变化，而频率设定在下限 的允许范围。 频率和占空比控制的综合影响允许功率从低至50瓦特变化到高达2千瓦。
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7.发明授权Induction heating apparatus having timing means responsive to temporary removal of cooking implement 失效感应加热装置具有响应于临时移除烹饪器具的定时装置
公开(公告)号：US4129767A
公开(公告)日：1978-12-12
申请号：US818322
申请日：1977-07-22
申请人： Keizo Amagami , Masatatsu Nakamura , Hideyuki Kominami , Kouji Funakoshi , Mitsuyuki Kiuchi , Takumi Mizukawa
发明人： Keizo Amagami , Masatatsu Nakamura , Hideyuki Kominami , Kouji Funakoshi , Mitsuyuki Kiuchi , Takumi Mizukawa
CPC分类号： H05B6/062
摘要： A plurality of switches each is provided in the vicinity of each of a plurality of heater coils of an induction heating apparatus, and responsive to removel of a cooking implement from a corresponding heater coil for being rendered open. A plurality of timers each is connected to each of the switches and causes the heater coil to be de-energized when the cooking implement is kept away from the heater coil for more than a predetermined time period.
摘要翻译： 在感应加热装置的多个加热器线圈的每一个附近设置多个开关，并且响应于来自相应的加热器线圈的烹饪器具的去除而被打开。 多个定时器各自连接到每个开关，并且当烹饪器具远离加热器线圈超过预定时间段时使加热器线圈断电。
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8.发明授权Multiple-load induction heating cooking apparatus with means for eliminating interference between two or more commutation circuits 失效具有用于消除两个或更多个换向电路之间的干扰的装置的多负载感应加热烹饪设备
公开(公告)号：US4092510A
公开(公告)日：1978-05-30
申请号：US732660
申请日：1976-10-15
CPC分类号： H05B6/6488 , H02M7/523 , H02M7/525 , H05B6/062
摘要： A multiple-load induction heating cooking apparatus comprises two or more induction heating commutation circuits each having the junction between its commutating inductor and capacitor manually selectively connected by corresponding one of a plurality of interconnecting switches equal in number to the commutation circuits to form a series-connected LC circuit to a high frequency energy source. The potential at the common point of connection is compared with a reference potential to produce an error signal which is used to control the frequency of the energy source so that the potential at the common point is maintained constant regardless of the magnitude of induction heating loads.
摘要翻译： 多负载感应加热烹饪设备包括两个或更多个感应加热换向电路，每个感应加热换向电路的换向电感器和电容器之间的接点手动地通过与换向电路相等的多个互连开关中的相应一个相互连接， 连接的LC电路到高频能量源。 将公共连接点处的电位与参考电位进行比较，以产生用于控制能量源的频率的误差信号，使得无论感应加热负载的大小如何，公共点处的电位都保持恒定。
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公开(公告)号：US4145592A
公开(公告)日：1979-03-20
申请号：US749258
申请日：1976-12-10
摘要： Induction heating apparatus using gate-controlled switching devices includes a zero crossing point detector for detecting the occurrence of each zero crossing point of high frequency energization current, and a timing circuit which provides timing action in response to the detected zero crossing point. The timing action is controlled by a power control circuit which detects the level of energy delivered to a load within a range from the inherent turn-off time of the gate-controlled switching devices to a desired value.
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10.发明授权Induction heating apparatus using a saturable reactor for power control purposes 失效感应加热装置使用可饱和电抗器进行功率控制
公开(公告)号：US4055740A
公开(公告)日：1977-10-25
申请号：US666973
申请日：1976-03-15
CPC分类号： H05B6/06 , H02M7/523 , H01F2038/003
摘要： An induction heating apparatus includes a saturable reactor having a pair of rectangular ferrite cores. An air gap is provided in each ferrite core to provide a gradually increasing saturation characteristic on the magnetization curve of the cores. A pair of series-connected load windings is coiled around each core and a control winding is coiled around a common magnetic path of the cores. A power control circuit produces a DC control current that passes through the control winding. The high frequency energization current is passed through the load windings. Means are provided to control the DC control current at a desired setting. Preferably, the actual power level is detected to control the DC current through a feedback loop.
摘要翻译： 感应加热装置包括具有一对矩形铁氧体磁芯的可饱和电抗器。 在每个铁氧体磁芯中提供气隙以在磁芯的磁化曲线上提供逐渐增加的饱和特性。 一对串联的负载绕组围绕每个磁芯卷绕，并且控制绕组围绕磁芯的公共磁路卷绕。 功率控制电路产生通过控制绕组的直流控制电流。 高频通电电流通过负载绕组。 提供装置以在期望的设置下控制DC控制电流。 优选地，检测实际功率电平以控制通过反馈回路的直流电流。
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