CN2859984Y - Electromagnetic oven control device - Google Patents

Electromagnetic oven control device Download PDF

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Publication number
CN2859984Y
CN2859984Y CN 200520066573 CN200520066573U CN2859984Y CN 2859984 Y CN2859984 Y CN 2859984Y CN 200520066573 CN200520066573 CN 200520066573 CN 200520066573 U CN200520066573 U CN 200520066573U CN 2859984 Y CN2859984 Y CN 2859984Y
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circuit
microcontroller
output
resistor
connected
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CN 200520066573
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余青辉
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深圳市拓邦电子科技股份有限公司
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Abstract

The utility model relates to an electromagnetic oven control device, including an AC filter circuit, a rectifier filter circuit, a power circuit, a voltage detection and a current detection, charactered in that it also includes a heating circuit, a surge sampling, a DC voltage-dividing circuit, a C-pole voltage-dividing circuit of IGBT and a micro-controller. The output terminals of the surge sampling, the DC voltage-dividing circuit, and the C-pole voltage-dividing circuit of IGBT are all connected with the microcontroller; the said microcontroller is connected to the input terminals of the IGBT driver circuit; the said microcontroller controls the output of the programmable pulse generator by the outputs of the first comparator, the second comparator and AD converters; the output of the said programmable pulse generator controls the said IGBT driver circuit. The utility model is an electromagnetic oven control device with a reasonable design, a simple and innovative circuit structure, and low-cost.

Description

一种电磁炉控制装置 One kind of cooker control means

技术领域 FIELD

本实用新型涉及一种电磁炉,更具体地说,涉及一种电磁炉控制装置。 The present invention relates to a cooker, and more particularly, to a cooker control means.

背景技术 Background technique

现有电磁炉的控制装置,其加热控制电路通常由比较器和/或分立元器件组成,控制电路的特点是元器件数量多、电路结构复杂,其原理框图如图1所示,包括交流虑波电路、整流虑波电路、加热电路、IGBT驱动电路、电源电路、电压检测、浪涌采样、电流检测、直流分压电路、IGBT C极分压电路、比较输出电路、过压保护电路、同步比较电路、振荡电路、PWM调整电路、浪涌保护电路和微控制器。 The control device of the conventional cooker, heating control circuit which usually consists of a comparator and / or discrete components and parts, the characteristics of the control circuit is the number of components, a complicated circuit structure, its block diagram shown in Figure 1, comprises an alternating current wave into account circuit, consider wave rectifying circuit, a heating circuit, the IGBT driver circuit, a power supply circuit, a voltage detection, sampling surge current detection, DC voltage dividing circuit, IGBT C extreme dividing circuit, the output of the comparison circuit, overvoltage protection circuit, the synchronous comparison circuit, an oscillator, the PWM adjustment circuit, the surge protection circuit and the microcontroller. 上述控制装置存在的缺点是:由于需要的元器件数量相对较多,而导致其成本高、体积大且可靠性低,另外由于电路结构复杂,抗干扰性能不易控制、设计调试及维修难度大,因而要求开发调试及维修人员必须具有较高技术水平。 Disadvantage that the control device is: Since relatively large number of components required, resulting in high cost, low reliability and large volume, since the circuit construction is complicated Further, anti-jamming performance is difficult to control, large design commissioning and maintenance difficulty, thus requiring the development of commissioning and maintenance personnel must have a high level of technology.

实用新型内容本实用新型要解决的技术问题在于,针对现有技术的上述控制装置中元器件数量多、电路结构复杂的缺陷,提供一种电磁炉控制装置。 SUMMARY The present invention is to solve the technical problem that the control for the above-described prior art apparatus the number of components, a complicated circuit structure of a defect, there is provided a cooker control means.

本实用新型解决其技术问题所采用的技术方案是:一种电磁炉控制装置,包括交流虑波电路、整流虑波电路、电源电路、电压检测和电流检测,其特征在于,还包括加热电路、浪涌采样、直流分压电路、IGBT C极电压分压电路和微控制器,所述浪涌采样、直流分压电路及IGBT C极电压分压电路的输出端均与微控制器连接,所述微控制器与所述IGBT驱动电路的输入端连接,所述微控制器通过第一比较器、第二比较器的输出和AD转换器的输出控制可编程脉冲发生器的输出,所述可编程脉冲发生器的输出所述控制IGBT驱动电路。 Aspect of the present invention to solve the technical problem is: A cooker control apparatus, comprising consider wave AC circuit, consider wave rectifying circuit, a power supply circuit, the voltage detection and the current detection, characterized by further comprising a heating circuit, waves Chung sampling, the DC voltage dividing circuit, IGBT C voltage dividing circuit and the microcontroller, the sampling surge, DC voltage dividing circuit and the output terminal of IGBT C voltage dividing circuit are connected to the microcontroller, the the microcontroller and an input terminal of the IGBT driver circuit is connected to the microcontroller via a first comparator, the output of the second comparator and the output of the AD converter control output of a programmable pulse generator, said programmable the control output of the pulse generator IGBT drive circuit.

本实用新型所述浪涌采样电路包括浪涌取样电路和浪涌参考电压电路,其中所述浪涌取样电路包括电阻R7、R8、R9和电容C1,电阻R8与R9连接处的电压信号输出到所述微制器的第一比较器的正输入端,所述浪涌参考电压电路包括电阻R5和R6,电阻R5和R6连接处的参考电压输出到微控制器的第一比较器的负输入端,通过微控制器的内部第一比较器来检测是否有浪涌干扰。 The surge of the present invention comprises a sampling circuit and a sampling circuit inrush surge voltage reference circuit, wherein the sampling circuit comprises a surge resistors R7, R8, R9 and capacitor C1, a voltage signal output resistors R8 and R9 to the junction the first comparator microfabrication positive input terminal, the reference voltage circuit comprises a surge resistors R5 and R6, the voltage output of the reference resistors R5 and R6 is connected to the first comparator at the negative input of the microcontroller end is detected by the first comparator internal microcontroller if there is a surge of interference.

本实用新型所述直流电压分压电路包括电阻R10、R11、R12及电容C2,其中电阻R10的一端接在所述加热电路直流电源的输入端,另一端与电阻R11串联;电阻R11与R12连接处的电压信号输出到微控制器的第二比较器的负输入端,为跟踪加热波形提供基准信号。 The present invention said DC voltage dividing circuit comprising resistors R10, R11, R12 and capacitor C2, a heating circuit in the direct current power supply input terminal of resistor R10 wherein one end, the other end of the resistor R11 in series; resistors R11 and R12 connected voltage signal at the output to the negative input terminal of the second comparator microcontroller, to provide a reference signal for the tracking waveform heating.

本实用新型所述IGBT C极电压分压电路包括电阻R13、R14、R15、R16、R17、二极管D1及电容C3、C4,其中电阻R13的一端接在所述加热电路与所述IGBT驱动电路的连接处,电阻R14与R15连接处的电压信号输出到微控制器的第二比较器的正输入端连接,为跟踪加热波形提供波形特征信号,电阻R15与电阻R16的中间节点与二极管D1的正极连接,二极管D1负极的电压信号输出到微控制内部AD转换器的输入端,用于监测IGBT1的C极工作电压是否出现异常。 C of the IGBT according to the present invention, voltage dividing circuit includes resistors R13, R14, R15, R16, R17, a diode D1 and a capacitor C3, C4, wherein one end of the resistor R13 in the IGBT drive circuit and the heating circuit, a second comparator connected to the positive input terminal is connected, the resistor R14 and R15 is connected at the output a voltage signal to the microcontroller, providing a waveform signal characteristic, resistor R15 and the resistor R16 and the diode D1 intermediate node to track the waveform of the positive electrode heating connection, the voltage signal output to the cathode of the diode D1 inside the micro control input of the AD converter, for monitoring the operating voltage of the IGBT1 C electrode is abnormal.

本实用新型所述IGBT驱动电路包括IGBT1、电阻R1、R2、R3、R4及三极管Q1、Q2,其中IGBT1的C极与所述加热电路连接,三极管Q1和Q2的B极与所述微控制器内部可编程脉冲发生器的输出端连接,用于微控制器向IGBT驱动电路输出IGBT1的控制信号。 The present invention includes a drive circuit of the IGBT IGBT1, resistors R1, R2, R3, R4 and transistors Q1, Q2, wherein the C IGBT1 connected with the heating circuit, the transistors Q1 and Q2 and the microcontroller pole B internal programmable pulse generator output terminal is connected to a microcontroller for driving the control circuit outputs a signal to IGBT1 IGBT.

本实用新型所述加热电路3包括谐振电容C3和加热线盘L。 The present invention The heating circuit 3 comprises a resonant capacitor C3 and heater plate L.

本实用新型所述微控制器包括单片机U1、电阻R18、R19、R20、二极管D2、晶体振荡体XL1及电容C5,其中晶体振荡体XL1及电阻R18组成时钟电路,为单片机U1提供时钟信号,电阻R19、R20、二极管D2和电容C5组成单片机U1复位电路,单片机U1用于控制电磁炉的加热过程。 The present invention comprises a single chip microcontroller U1, resistors R18, R19, R20, diode D2, and a capacitor XL1 crystal oscillating body C5, and resistors R18 wherein XL1 body composition crystal oscillator clock circuit providing a clock signal to the microcontroller U1, resistor R19, ​​R20, diode D2 and capacitor C5 form microcontroller U1 reset circuit, the microcontroller U1 controls the heating cooker.

本实用新型的有益效果是,由于将加热控制电路部分由微控制器处理,所以不仅降低产品的生产成本,而且可大大减少其体积,从而也相应的减少电磁炉的体积,另外,由于元器件数量的减少及微控制器具有较强的抗干扰能力,大大提高了控制装置的可靠性,从而也大大提高了电磁炉的性能,是一种设计合理、电路结构简洁新颖、成本低廉的电磁炉控制装置。 The present invention has the advantages that, since the heating control circuit portion of the processing by the microcontroller, so that not only reduces production costs, but also greatly reduce the volume, thereby correspondingly reducing the volume of the appliance, in addition, since the number of components the microcontroller has a strong reducing and anti-jamming capability, greatly improving the reliability of the control device, thus greatly improving the performance of the appliance, is reasonable design, novel circuit configuration is simple, low cost cooker control means.

附图说明 BRIEF DESCRIPTION

下面将结合附图及实施例对本实用新型作进一步说明,附图中:图1是现有电磁炉控制装置的原理框图;图2是本实用新型的原理框图;图3是本实用新型的微控制器原理框图;图4是本实用新型的一个优选实施例的电路原理图。 The accompanying drawings and the following examples further illustrate embodiments of the present invention for the drawings in which: FIG. 1 is a schematic block diagram of a conventional cooker control device; FIG. 2 is a block diagram of the present invention; FIG. 3 is a micro-control of the present invention Block diagram; FIG. 4 is a circuit diagram of the embodiment of the present invention a preferred embodiment.

具体实施方式 Detailed ways

如图2、图3所示,一种电磁炉控制装置,包括交流虑波电路1、整流虑波电路2、电源电路5、电压检测6和电流检测8,其特征在于,还包括加热电路3、浪涌采样7、直流分压电路9、IGBT C极电压分压电路10和微控制器11,所述浪涌采样7、直流分压电路9及IGBT C极电压分压电路10的输出端均与微控制器11连接,所述微控制器11与所述IGBT驱动电路4的输入端连接,所述微控制器11通过第一比较器12、第二比较器13的输出和AD转换器15的输出控制可编程脉冲发生器14的输出,所述可编程脉冲发生器14的输出所述控制IGBT驱动电路4。 2, FIG. 3 A cooker control apparatus includes an AC chopper circuit 1 into account, consider wave rectifying circuit 2, a power supply circuit 5, the voltage detector 6 and a current detection 8, characterized by further comprising a heating circuit 3, surge sample 7, DC voltage dividing circuit 9, IGBT C voltage dividing circuit 10 and the microcontroller 11, the surge sample 7, DC voltage dividing circuit 9 and the IGBT C voltage dividing circuit 10 are output terminals 11 is connected to the microcontroller, the microcontroller 11 to the IGBT driving circuit 4 is connected to the input terminal of the microcontroller 11 via a first comparator 12, the comparator output and a second AD converter 15 13 output control programmable pulse generator output 14, the output of the programmable pulse generator 14 controls the IGBT driving circuit 4.

如图4所示,所述浪涌采样电路7包括浪涌取样电路和浪涌参考电压电路,其中浪涌取样电路包括由电阻R7、R8、R9和电容C1所组成的电路,浪涌源取自电流检测电路8并与电阻R7、R8连接,电阻R7的另一端接地,电阻R8的另一端经过电阻R9与电容C1中间节点接在微控制器11的第一比较器的正输入端(即C0VIN+引脚),电阻R9的另一端接电源+5V,电容C1的另一端接地。 4, the sampling circuit 7 comprises a surge inrush surge sampling circuit and a reference voltage circuit, wherein the sampling circuit comprises a surge circuit of a resistor R7, R8, R9, and capacitor C1 is composed of, taking surge source from the current detecting circuit 8 and, R8 is connected to the resistor R7, the other end of the resistor R7, the other end of the resistor R8 via the resistor R9 and the capacitor C1 connected to the intermediate node of the microcontroller 11 of the first comparator positive input terminal (i.e. C0VIN + pin), the other end of the resistor R9 + other end of the power supply 5V, the capacitor C1. 浪涌参考电压电路包括由电阻R5和R6所组成的电路,电阻R5和R6串联,其中间节点接在微控制器11的第一比较器的负输入端(即C0VIN-引脚),电阻R5的另一端接电源+5V,电阻R6的另一端接地。 Surge by the reference voltage circuit includes a circuit composed of resistors R5 and R6, the resistors R5 and R6 in series, wherein the microcontroller connected between nodes of the first comparator 11 negative input terminal (i.e. pin C0VIN-), resistor R5 the other end of the power supply + 5V, the other end of the resistor R6. 通过微控制器11的第一比较器12可以检测是否有浪涌干扰。 By the microcontroller 12 of the first comparator 11 can detect whether there is a surge of interference.

所述加热电路3包括由谐振电容C3和加热线盘L1所组成的电路。 The heating circuit 3 comprises a circuit composed of a resonant capacitor C3 and heater plate consisting of L1. 所述谐振电容C3和所述加热线盘L1并联,一端接在所述整流滤波电路2的直流电源的输出端,另一端接在所述IGBT驱动电路4的IGBT1的C极引脚。 The resonant capacitor C3 and the heating coil L1 in parallel, one end of the DC power source at the output of the rectifier filter circuit 2 and the other end of the IGBT1 in the IGBT drive circuit 4 C electrode pin.

所述IGBT驱动电路4包括由功率管IGBT1、电阻R1、R2、R3、R4及三极管Q1、Q2所组成的电路。 The IGBT drive circuit of a power circuit 4 comprises a tube IGBT1, resistors R1, R2, R3, R4 and transistors Q1, Q2 thereof. 其中功率管IGBT1的C极与所述加热电路3连接,三极管Q1的C极接电源+18V,三极管Q1的E极与电阻R3连接,电阻R3的另一端与电阻R2及三极管Q2的E极连接,电阻R2的另一端与电阻R1及功率管IGBT1的G极连接,电阻R1的另一端与电阻R4、三极管Q2的C极及功率管IGBT1的E极一起连接到地,电阻R4的另一端与三极管Q1及Q2的B极一起接在微控制器11的PPG引脚。 Wherein the power transistor IGBT1 C electrode 3 is connected to the heating circuit, the transistor Q1 is connected to the power pole C + 18V, the transistor Q1 is connected to resistor R3 and the electrode E, the other end of the resistor R3 and the resistor R2 and the transistor Q2 is connected to electrode E , the resistor R2 and the other end connected to the resistor R1 and the power transistor IGBT1 of G, the resistor R1 and the other end of the resistor R4, transistor Q2 C electrode and the power tube of IGBT1 E connected together, the resistor R4 and the other end transistors Q1 and Q2 connected together in a pole B PPG pin 11 of the microcontroller. 微控制器11的PPG引脚为其内部可编程脉冲发生器14的输出引脚,用于微控制器11向IGBT驱动电路4输出IGBT1的控制信号。 The microcontroller 11 pin PPG output pin for an internal programmable pulse generator 14, the microcontroller 11 controls a signal outputted to the driving circuit IGBT1 IGBT.

所述直流电压分压电路9包括由电阻R10、R11、R12及电容C2所组成的电路。 The DC circuit 9 comprises a voltage dividing circuit by the resistor R10, R11, R12 and capacitor C2 thereof. 其中电阻R10的一端接在所述加热电路3直流电源的输入端,另一端与电阻R11串联;电阻R11与电阻R12的中间节点通过与电容C2的交接点接在微控制器11的第二比较器13的负输入端(即C1VIN-引脚),用于为跟踪加热波形提供基准信号,电阻R12和电容C2的另一端连接到地。 Wherein one end of the resistor R10 at the input of the DC power source 3 of the heating circuit, and the other end of the resistor R11 in series; intermediate node resistor R11 through the resistor R12 and the junction point of capacitor C2 is connected to the second comparator 11 of the microcontroller negative input terminal (i.e. C1VIN- pin) 13 for providing a reference signal, the other end of the resistor R12 and capacitor C2 is connected to the ground trace heating waveforms.

所述IGBT C极电压分压电路10包括由电阻R13、R14、R15、R16、R17、二极管D1及电容C3、C4所组成的电路。 The IGBT C voltage dividing circuit 10 includes a resistor R13, R14, R15, R16, R17, a diode D1 and a capacitor C3, C4 circuit composed. 其中电阻R13的一端接在所述加热电路3与所述IGBT驱动电路4的连接处,另一端与电阻R14串联;电阻R14与电阻R15的中间结点的一端与电容C3连接,另一端与微控制器11的第二比较器13的正输入端连接(即C1VIN+引脚),用于为跟踪加热波形提供波形特征信号。 Wherein one end of the resistor R13 in the heating circuit 3 is connected to the IGBT driving circuit 4 at the other end of the resistor R14 in series; end of the intermediate node resistor R14 and resistor R15 and the capacitor C3 is connected, the other end of the micro the controller of the second comparator 11 is connected to the positive input terminal 13 (i.e., pin C1VIN +) for providing a tracking signal waveform wherein waveforms heating. 电阻R15与电阻R16的中间节点与二极管D1的正极连接,二极管D1的负极通过与电阻R17、电容C4的交接点接在微控制器11的内部AD转换器15(即PB2/AN2引脚),用于为监测功率管IGBT1的C极工作电压提供信号。 Resistor R15 and the resistor R16 connected to the positive intermediate node of the diode D1, the cathode of diode D1 and the resistor junction points by R17, capacitor C4 is connected to the internal AD converter 15 of the microcontroller 11 (i.e. PB2 / AN2 pin), C electrode for providing a signal monitoring operation voltage of the power transistor IGBT1. 电阻R16、R17及电容C3、C4的另一端一起连接到地。 Resistors R16, R17 and capacitor C3, C4 and the other end connected to the ground together.

所述微控制器11的C1VIN-引脚和C1VIN+引脚为微控制器11的第一比较器12的输入端,通过第一比较器12跟踪加热波形,并提供加热控制。 The microcontroller 11 pin C1VIN- and C1VIN + input pin of the microcontroller 12 first comparator 11, the comparator 12 through the first heating trace waveform, and provides heating control. 微控制器11的PB2/AN2引脚为其内部AD转换器15的输入端,通过AD转换可以监测IGBT1的C极工作电压是否出现异常。 PB2 / AN2 input pins for the internal AD converter 15 to the microcontroller 11, the AD conversion can be monitored by the working electrode C is abnormal voltage of the IGBT1.

所述微控制器11包括由单片机U1、电阻R18、R19、R20、二极管D2、晶体振荡体XL1及电容C5所组成的电路,其中晶体振荡体XL1及电阻R18组成时钟电路,用于为单片机U1提供时钟信号。 The microcontroller circuit 11 comprises a microcontroller U1, resistors R18, R19, R20, diode D2, the oscillating body XL1 crystal capacitor C5 and consisting of, wherein the crystal oscillating body consisting of resistor R18 and XL1 clock circuit for the microcontroller U1 It provides a clock signal. 电阻R19、R20、二极管D2和电容C5组成单片机U1复位电路。 Resistors R19, R20, diode D2 and capacitor C5 form a reset circuit microcontroller U1. 单片机U1用于控制电磁炉的加热过程,在本实施例中,单片机U1的型号为HolTek的HT46R12。 Process control of the microcontroller U1 for heating cooker, in the present embodiment, the microcontroller U1 is a Model HolTek HT46R12.

交流滤波电路1、整流滤波电路2、电源电路5、电压检测电路6及电流检测电路8均与现有电磁炉控制装置的电路相同。 AC filter circuit 1, the rectifier filter circuit 2, a power supply circuit 5, the voltage detecting circuit 6 and the current detecting circuit 8 are conventional oven circuit and the same control device.

用电磁炉进行加热时,微控制器11首先检测是否在电磁炉上放有合适的加热锅具,执行以下操作:微控制器11内部的可编程脉冲发生器输出约10微秒的正脉冲波形给IGBT驱动电路4,让功率管IGBT1导通约10微秒后关闭,在功率管IGBT1导通期间,输入电源对加热电路3中的加热线盘充电储能,功率管IGBT1关闭后,加热电路3开始发生LC阻尼振荡,此时通过直流电压分压电路9、IGBT C极电压分压电路10及微控制器11的内部比较器来检测LC阻尼振荡的衰减状况,进而判定是否放有合适的加热锅具。 When the heating cooker, the microcontroller 11 first detects whether the cooker and placed in a heating pot with a suitable, do the following: a programmable pulse generator output of the internal microcontroller 11 to about 10 microsecond positive pulse waveform to the IGBT drive circuit 4, so that the power transistor IGBT1 turned off after about 10 microseconds, the power transistor IGBT1 during conduction, the input power of the heating coil for heating the charge storage circuit 3, the power transistor IGBT1 closed heating circuit 3 starts LC ringing occurs, when the DC voltage dividing circuit 9, IGBT C voltage dividing circuit 10 and a comparator internal microcontroller 11 to detect the ringing of the LC attenuation conditions, and further determines whether there is placed a suitable heating pot with.

当微控制器11检测到在电磁炉上放有合适的加热锅具后,微控制器11内部的可编程脉冲发生器输出约10微秒的正脉冲波形给IGBT驱动电路4,让功率管IGBT1导通约10微秒后关闭,并在此时通过程序设置由微控制器11的内部比较器来控制可编程脉冲发生器的输出,以启动电磁炉加热。 When the microcontroller 11 detects the cooker placed in a heating pot with a suitable, programmable pulse generator output of the internal microcontroller 11 to about 10 microseconds to a positive pulse waveform of the IGBT drive circuit 4, so that the power guiding tube IGBT1 after about 10 microseconds pass off, and at this time is controlled by the microcontroller is provided an internal comparator 11 outputs a programmable pulse generator by a program, to start the heating cooker. 在功率管IGBT1关闭期间,加热电路3开始发生LC阻尼振荡,进而产生高频涡流对锅具进行加热,此时通过直流电压分压电路9、IGBT C极电压分压电路10及微控制器11的内部比较器来跟踪LC阻尼振荡的波形,当功率管IGBT1的C极电压下降到一定值时,微控制器11的内部比较器将输出低电平,并触发微控制器11内部的可编程脉冲发生器再次输出正脉冲波形给IGBT驱动电路4,让功率管IGBT1导通一定时间后又关闭……如此反复控制功率管IGBT1开关,进而实现电磁炉的加热。 IGBT1 during the power off tube, heated LC circuit 3 starts ringing occurs, thereby generating high frequency eddy current heating of the pot, when the DC voltage dividing circuit 9, IGBT C voltage dividing circuit 10 and the microcontroller 11 to track the internal comparator LC ringing waveform when IGBT1 C voltage power transistor drops to a certain value, the microcontroller internal comparator 11 outputs a low level, and programmable internal triggers microcontroller 11 again a positive pulse generator output pulse waveform to the IGBT drive circuit 4, so that the power transistor IGBT1 turned off after a certain time and so forth ...... IGBT1 to control the power switch tube, so as to realize the heating cooker. 可以通过检测电压及电流来检测加热功率,并根据实际加热功率与目标功率的差值来调节可编程脉冲发生器输出的正脉冲波形的时间宽度,进而实现功率稳定效果。 It can be detected by detecting voltage and current of the heating power, and to adjust the width of the positive pulse time waveform of the output of a programmable pulse generator according to the difference between the actual heating power to the target power, so as to realize the power stabilization effect.

在电磁炉工作过程中,将通过微控制器11的内部比较器来检测浪涌干扰情况,一旦出现浪涌干扰,则微控制器11的内部比较器输出低电平,并禁止微控制器11内部的可编程脉冲发生器输出正脉冲波形,进而可靠的关闭功率管IGBT1,停止加热。 Cooker In operation, the microcontroller will be detected by comparator 11 inside the surge interference, once the surge interference occurs, then the microcontroller internal comparator 11 outputs a low level and disable the internal microcontroller 11 the programmable pulse generator output pulse waveform is positive, power transistor and thus reliable closure of IGBT1, heating was stopped.

在电磁炉加热过程中,将通过IGBT C极电压分压电路10及微控制器11内部AD转换器来监测功率管IGBT1的C极工作电压,一旦出现异常,将控制微控制器11内部的可编程脉冲发生器的输出,进而保证功率管IGBT1及电磁炉的安全。 In the heating cooker, the voltage divider circuit 10 and the microcontroller 11 via an AD converter inside the IGBT C C electrode voltage monitoring operating voltage of the power transistor IGBT1, once the abnormal, the programmable internal control microcontroller 11 the output of the pulse generator, thereby ensuring the safety of the appliance and the power transistor IGBT1.

以上内容是结合具体的实施方式对本实用新型所作的进一步详细说明,不能认定本实用新型的具体实施只局限于这些说明。 Above with reference to specific embodiments further detailed description of the invention made by the present invention should not be considered limited to the particular embodiments described. 对于本实用新型所属技术领域的普通技术人员来说,在不脱离本实用新型构思的前提下,还可以做出若干简单推演或替换,都应当视为属于本实用新型由所提交的权利要求书确定的专利保护范围。 Those of ordinary skill in the art the present invention belongs to it, without departing from the concepts of the present invention, you can make various simple deduction or replacement should be considered by the present invention as claimed in the new claims submitted belongs the patentable scope is determined.

Claims (8)

1.一种电磁炉控制装置,包括交流虑波电路(1)、整流虑波电路(2)、电源电路(5)、电压检测(6)和电流检测(8),其特征在于,还包括加热电路(3)、浪涌采样(7)、直流分压电路(9)、IGBT C极电压分压电路(10)和微控制器(11),所述浪涌采样(7)、直流分压电路(9)及IGBT C极电压分压电路(10)的输出端均与所述微控制器(11)连接,所述微控制器(11)与所述IGBT驱动电路(4)的输入端连接。 A cooker control apparatus includes an AC chopper circuit considered (1), consider wave rectifier circuit (2), a power supply circuit (5), a voltage detector (6) and the current detector (8), characterized by further comprising heating circuit (3), the surge sample (7), DC voltage dividing circuit (9), IGBT C voltage dividing circuit (10) and a microcontroller (11), said surge sampling (7), dividing the DC the output circuit (9) and C IGBT voltage dividing circuit (10) are connected to the microcontroller (11), the microcontroller (11) and the IGBT drive circuit (4) input terminal connection. 所述微控制器(11)通过第一比较器(12)、第二比较器(13)的输出和AD转换器(15)的输出控制可编程脉冲发生器(14)的输出,所述可编程脉冲发生器(14)的输出控制IGBT驱动电路(4)。 Said microcontroller (11) through a first comparator (12), the output of the second comparator (13) and the output of the AD converter (15) controlling a programmable pulse generator (14) output, said output programming pulse generator (14) controls the IGBT drive circuit (4).
2.根据权利要求1所述的电磁炉控制装置,其特征在于,所述浪涌采样电路(7)包括浪涌取样电路和浪涌参考电压电路,其中所述浪涌取样电路包括电阻R7、R8、R9和电容C1,电阻R8与R9连接处的电压信号输出到所述微制器(11)的第一比较器(12)的正输入端,所述浪涌参考电压电路包括电阻R5和R6,电阻R5和R6连接处的参考电压输出到微控制器(11)的第一比较器(12)的负输入端,通过微控制器(11)的内部第一比较器(12)来检测是否有浪涌干扰。 2. Induction control device according to claim 1, wherein said surge sampling circuit (7) comprises a surge and surge sampling circuit reference voltage circuit, wherein the sampling circuit comprises a surge resistors R7, R8 , the positive input terminal of R9 and the capacitor C1, the resistor R8 and R9 connected to the output voltage signal at the first comparator (12) to said micro-system device (11), said reference voltage circuit comprises a surge resistors R5 and R6 , resistors R5 and R6 connected to the reference voltage at the output to the negative input of the microcontroller (11) a first comparator (12) by the microcontroller (11) inside the first comparator (12) to detect whether there surge interference.
3.根据权利要求1所述的电磁炉控制装置,其特征在于,所述直流电压分压电路(9)包括电阻R10、R11、R12及电容C2,其中电阻R10的一端接在所述加热电路(3)直流电源的输入端,另一端与电阻R11串联;电阻R11与R12连接处的电压信号输出到微控制器(11)的第二比较器(13)的负输入端,为跟踪加热波形提供基准信号。 3. The control device of the cooker according to claim 1, wherein said DC voltage dividing circuit (9) comprises a resistor R10, R11, R12 and capacitor C2, one end of the resistor R10 in the heating circuit ( 3) input terminal of the DC power source, the other end of the resistor R11 in series; negative input voltage signal output resistors R11 and R12 connected to the microcontroller at (11) a second comparator (13), the waveform is supplied to the heating track the reference signal.
4.根据权利要求1所述的电磁炉控制装置,其特征在于,所述IGBT C极电压分压电路(10)包括电阻R13、R14、R15、R16、R17、二极管D1及电容C3、C4,其中电阻R13的一端接在所述加热电路(3)与所述IGBT驱动电路(4)的连接处,电阻R14与R15连接处的电压信号输出到微控制器(11)的第二比较器(13)的正输入端连接,为跟踪加热波形提供波形特征信号,电阻R15与电阻R16的中间节点与二极管D1的正极连接,二极管D1负极的电压信号输出到微控制(11)内部AD转换器(15)的输入端,用于监测IGBT1的C极工作电压是否出现异常。 4. The control apparatus of the cooker in claim 1, wherein said IGBT C voltage dividing circuit (10) includes a resistor R13, R14, R15, R16, R17, a diode D1 and a capacitor C3, C4, wherein a second comparator (13 is connected at the resistor R14 and outputs a voltage signal with the termination resistor R13 in the IGBT drive circuit of the heating circuit (3) (4) R15 is connected to the microcontroller (11) ) positive input terminal connected to provide a positive electrode connected to the waveform characteristics of the signal, the resistor R15 and the resistor R16 intermediate node of the diode D1 is heat traced waveform of the voltage signal output diode D1 of the negative electrode to the microcontroller (11) inside an AD converter (15 ) input terminal, C electrode for monitoring the operating voltage of the IGBT1 is abnormal.
5.根据权利要求1所述的电磁炉控制装置,其特征在于,所述IGBT驱动电路(4)包括IGBT1、电阻R1、R2、R3、R4及三极管Q1、Q2,其中IGBT1的C极与所述加热电路(3)连接,三极管Q1和Q2的B极与所述内部可编程脉冲发生器(14)的输出端连接,用于所述微控制器(11)向所述IGBT驱动电路(4)输出IGBT1的控制信号。 The cooker control device according to claim 1, characterized in that the IGBT drive circuit (4) comprises a IGBT1, resistors R1, R2, R3, R4 and transistors Q1, Q2, wherein the electrode of IGBT1 C heating circuit (3) connected to the output terminal of the transistor Q1 and Q2 electrode B with the internal programmable pulse generator (14) connected to the microcontroller (11) to the IGBT drive circuit (4) IGBT1 the output control signal.
6.根据权利要求1所述的电磁炉控制装置,其特征在于,所述微控制器(11)包括单片机U1、电阻R18、R19、R20、二极管D2、晶体振荡体XL1及电容C5,其中晶体振荡体XL1及电阻R18组成时钟电路,为单片机U1提供时钟信号,电阻R19、R20、二极管D2和电容C5组成单片机U1复位电路,单片机U1用于控制电磁炉的加热过程。 6. The control apparatus according cooker according to claim 1, characterized in that the microcontroller (11) comprises a microcontroller U1, resistors R18, R19, R20, diode D2, and a capacitor XL1 crystal oscillating body C5, wherein the crystal oscillator XL1 body composed of resistor R18 and the clock circuit, the clock signal for the microcontroller U1, resistors R19, R20, diode D2 and capacitor C5 form microcontroller U1 reset circuit, the microcontroller U1 controls the heating cooker.
7.根据权利要求6所述的电磁炉控制装置,其特征在于,所述的单片机U1的型号为HT46R12。 7. A cooker control means according to claim 6, wherein said microcontroller U1 model HT46R12.
8.根据权利要求1所述的电磁炉控制装置,其特征在于,所述加热电路(3)包括谐振电容C3和加热线盘L。 8. A cooker control means according to claim 1, wherein said heating circuit (3) comprises a resonant capacitor C3 and heater plate L.
CN 200520066573 2005-10-27 2005-10-27 Electromagnetic oven control device CN2859984Y (en)

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WO2010066102A1 (en) * 2008-12-12 2010-06-17 深圳市鑫汇科科技有限公司 Method and circuit for automatic calibration of the power of electromagnetic oven
WO2010066097A1 (en) * 2008-12-12 2010-06-17 深圳市鑫汇科科技有限公司 Electromagnetic oven circuit based on soc chip
WO2010066103A1 (en) * 2008-12-12 2010-06-17 深圳市鑫汇科科技有限公司 Method and circuit for detecting intensity of igbt recoil high voltage in electromagnetic stove
WO2010142190A1 (en) * 2009-06-08 2010-12-16 深圳市鑫汇科科技有限公司 Large power electromagnetic cooker circuit based on system-on-chip (soc)
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WO2010066103A1 (en) * 2008-12-12 2010-06-17 深圳市鑫汇科科技有限公司 Method and circuit for detecting intensity of igbt recoil high voltage in electromagnetic stove
WO2010066102A1 (en) * 2008-12-12 2010-06-17 深圳市鑫汇科科技有限公司 Method and circuit for automatic calibration of the power of electromagnetic oven
WO2010142190A1 (en) * 2009-06-08 2010-12-16 深圳市鑫汇科科技有限公司 Large power electromagnetic cooker circuit based on system-on-chip (soc)
EP2453568A1 (en) * 2009-07-07 2012-05-16 Shenzhen Chk Technology Co., Ltd. Digital control type power converter for cooking utensils
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EP2453568A4 (en) * 2009-07-07 2013-07-03 Shenzhen Chk Technology Co Ltd Digital control type power converter for cooking utensils
CN102013659B (en) 2010-11-18 2013-12-25 深圳和而泰智能控制股份有限公司 Surge voltage and current protective device
CN102013659A (en) * 2010-11-18 2011-04-13 深圳和而泰智能控制股份有限公司 Surge voltage and current protective device
CN102802289A (en) * 2012-07-30 2012-11-28 东莞市精诚电能设备有限公司 Electromagnetic induction heating control circuit based on digital signal processing
CN103108423A (en) * 2012-11-14 2013-05-15 明达实业(厦门)有限公司 Single tube electromagnetic field generator
CN103595372A (en) * 2013-11-23 2014-02-19 大连尚能科技发展有限公司 Pulse generating device
CN103595372B (en) * 2013-11-23 2015-12-30 大连尚能科技发展有限公司 A kind of pulse generating unit
CN104640257A (en) * 2015-02-04 2015-05-20 佛山市顺德区美的电热电器制造有限公司 Electromagnetic heating switch control circuit and electromagnetic heating device with same
CN105662117A (en) * 2016-04-13 2016-06-15 浙江大学 Boiling-free energy-saving hot pot device and boiling-free control method thereof
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