WO2016095394A1 - Electromagnetic resonant circuit, and control method and control system thereof - Google Patents

Electromagnetic resonant circuit, and control method and control system thereof Download PDF

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Publication number
WO2016095394A1
WO2016095394A1 PCT/CN2015/077726 CN2015077726W WO2016095394A1 WO 2016095394 A1 WO2016095394 A1 WO 2016095394A1 CN 2015077726 W CN2015077726 W CN 2015077726W WO 2016095394 A1 WO2016095394 A1 WO 2016095394A1
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Prior art keywords
module
resonant
control
signal
switch
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PCT/CN2015/077726
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French (fr)
Chinese (zh)
Inventor
雷俊
梁三林
董凯
卞在银
黄开平
李信合
张永亮
黄庶锋
何毅东
徐双江
王强
钟石刚
袁宏斌
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佛山市顺德区美的电热电器制造有限公司
美的集团股份有限公司
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Publication of WO2016095394A1 publication Critical patent/WO2016095394A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion

Definitions

  • the invention relates to the technical field of electromagnetic resonance, in particular to an electromagnetic resonance circuit, a control method of the electromagnetic resonance circuit and a control system of the electromagnetic resonance circuit.
  • two independent working coil coils are used to realize electromagnetic heating products (such as rice cookers, induction cookers, etc.) for heating different parts of the pot, which are widely popularized due to good cooking effect.
  • electromagnetic heating products such as rice cookers, induction cookers, etc.
  • the processor has an error in the determination of the synchronization signal, which causes an abnormality in the conduction of the insulated gate bipolar transistor (IGBT), and the problem of IGBT breakdown occurs.
  • IGBT insulated gate bipolar transistor
  • the present invention aims to solve at least one of the technical problems existing in the prior art.
  • a first resonant module and a first switch control module disposed in series between the positive pole and the negative pole of the power module
  • a second resonant module and a second switch control module disposed in series between the positive electrode and the negative electrode;
  • a reference signal detecting module connected to the positive pole, configured to detect a reference signal output by the positive pole
  • a resonant signal detecting module connected to the output end of the first resonant module and the output end of the second resonant module by the adaptive module, the adaptive module is configured to control the first resonant module or the a resonant signal at the output of the second resonant module;
  • a processor connected to the reference signal detecting module and the resonant signal detecting module, configured to determine, according to the reference signal and the resonant signal, whether the resonant signal crosses a zero point or approaches a zero point voltage, and is at the resonant signal
  • the first switch control module or the second switch control module is controlled to be turned on when the zero crossing or near zero.
  • the power module includes:
  • a rectifier circuit connected to the alternating current power source for rectifying an alternating current output of the alternating current power source
  • a filter circuit connected to the rectifier circuit for filtering the rectified electrical signal and outputting the reference signal.
  • the first resonant module or the second resonant module includes a heating coil and a capacitor disposed in parallel between the power module and the first switch control module.
  • the first switch control module or the second switch control module includes:
  • a transistor including two connection ends and a control end respectively connected to the first resonance module and the negative electrode;
  • a driving unit connected to the processor and the control end, configured to generate a driving signal according to a control signal output by the processor and input the control end, and the transistor controls the two connections according to the driving signal Turn on and off at the end.
  • the reference signal detection module includes a plurality of voltage dividing elements connected in series between the positive pole and the ground, and a connection point between the two of the voltage dividing elements is connected to the processor .
  • the adaptive module comprises:
  • the first diode set including at least one diode connected in series;
  • the second diode set comprising at least one diode connected in series.
  • the first diode set and the second diode set are capable of withstanding a reverse voltage above 1000 volts.
  • the diodes of the first diode group and the second diode group are fast recovery diodes.
  • the adaptive module includes a first controllable switch and a second controllable switch; a controllable switch is connected to the output end of the first resonant module and the resonant signal detecting module, and the second controllable switch is connected to the second resonant module and the resonant signal detecting module; And controlling on and off of the first controllable switch and the second controllable switch.
  • the first controllable switch and the second controllable switch are mechanical switches or electronic switches.
  • the adaptive module includes a first switching unit and a second switching unit; the first switching unit is coupled to an output end of the first resonant module and the resonant signal detecting module, a second switching unit is connected to the second resonant module and the resonant signal detecting module; the first switching unit includes a switch, the switch includes two connecting ends and a control end, and the two connecting ends are respectively connected to the An output end of the first resonance module and the ground, the control end is connected to the processor, the processor is configured to control the conduction or disconnection of the two connection ends by the control end; the second switch unit Including a switch, the switch includes two connection ends and a control end, the two connection ends are respectively connected to an output end of the second resonance module and a ground, the control end is connected to the processor, and the processing The device is configured to control the conduction or disconnection of the two terminals through the control terminal.
  • the resonant signal detecting module includes a plurality of voltage dividing elements connected in series between the adaptive module and ground, and a voltage dividing point of the plurality of voltage dividing elements is connected to the processor .
  • a first control unit configured to control the first resonant module or the second resonant module to operate
  • a detecting unit configured to detect whether the resonant signal falls through the reference signal to determine whether the resonant signal crosses a zero point or approaches a zero point voltage
  • a second control unit configured to be turned on by the switch control module corresponding to the resonant module that controls operation when the resonant signal is at or near a zero voltage.
  • the switch control module corresponding to the resonant module that controls operation when the zero crossing or near zero of the resonant signal is determined is turned on.
  • the preset time is started after the quasi-signal
  • the switch control module corresponding to the resonant module that controls the operation is turned on.
  • the predetermined time t ranges from 0.5 to 3 microseconds.
  • FIG. 1 is a schematic view of an electromagnetic resonance circuit according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a control system of an electromagnetic resonance circuit according to a first embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a method for controlling an electromagnetic resonance circuit according to a first embodiment of the present invention
  • FIG. 4 is a schematic diagram showing an operation waveform of an electromagnetic resonance circuit according to a first embodiment of the present invention
  • Figure 5 is a schematic view of an electromagnetic resonance circuit of a second embodiment of the present invention.
  • Fig. 6 is a schematic view showing an electromagnetic resonance circuit of a third embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include one or more of the described features either explicitly or implicitly.
  • the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, or may be electrically connected or may communicate with each other; may be directly connected or indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • Connected, or integrally connected may be mechanically connected, or may be electrically connected or may communicate with each other; may be directly connected or indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship.
  • the above terms can be understood in the present invention according to specific circumstances. The specific meaning.
  • an electromagnetic resonant circuit 100 includes a power module 10 , a first resonant module 21 and a first series connected in series between a positive electrode (+) and a negative electrode ( ⁇ ) of the power module 10 .
  • a switch control module 31, a second resonant module 22 and a second switch control module 32 sequentially disposed in series between the positive pole and the negative pole, a reference signal detecting module 40 connected to the positive pole, an adaptive module, and a pass
  • the adaptive module is coupled to the output of the first resonant module 21 and the output of the second resonant module 22 to the resonant signal detecting module 60 and the processor 70.
  • the reference signal detecting module 40 is configured to detect a reference signal output by the positive pole.
  • the adaptive module is configured to control selection of the resonant signal detecting module 60 to detect a resonant signal output by the first resonant module 21 or the second resonant module 22.
  • the processor 70 is connected to the reference signal detecting module 40 and the resonant signal detecting module 60, and configured to determine, according to the reference signal and the resonant signal, whether the resonant signal crosses a zero point or approaches a zero point voltage, and When the resonant signal falls through the reference signal, the processor delays the delay, and when the resonant voltage (the point at which the IGBT pin is connected to the inductor) crosses the zero point or approaches the zero point voltage, the first switch control module 31 or The second switch control module 32 is turned on.
  • the power module 10 includes an AC power source 11 and a rectifier circuit 12 connected to the AC power source 11 for rectifying the AC power output by the AC power source 11 and filtering connected to the rectifier circuit 12.
  • the circuit 13 is configured to filter the rectified alternating current and output the reference signal.
  • the AC power source 11 can be an alternating current of 220 volts and 50 Hz.
  • the rectifier circuit 12 can be a bridge circuit. One end of the output of the rectifier circuit 12 is grounded to form the negative electrode, and the other end forms the positive electrode.
  • the filter circuit 13 may include an inductor L1 disposed on the positive electrode and a capacitor C1 disposed between the positive electrode and the negative electrode to form an LC filter circuit, which can filter harmonics (noise) of the rectified electrical signal. .
  • the first resonant module 21 includes a heating coil L2 (ie, an inductor) and a capacitor C2 disposed in parallel between the power module 11 and the first switch control module 31.
  • a resonant circuit formed by the heating coil L2 and the capacitor C2 and the first switch control module 31 are connected in series between the positive pole and the negative pole, and the conduction of the control loop is performed in the first switch control module 31 and Resonance occurs in the change of disconnection.
  • the heating coil L2 thus produces a high frequency alternating magnetic field.
  • the magnetic flux in the alternating magnetic field not only causes a self-induced electromotive force in the heating coil L2, but also generates a mutual electromotive force in a corresponding portion of the pot, thereby generating eddy current and generating heat.
  • the first switch control module 31 includes a transistor 311 and a drive unit 312.
  • the transistor 311 includes two connection ends and a control end respectively connected to the first resonance module 21 and the negative electrode.
  • the driving unit 312 is connected to the processor 70 and the control terminal, and configured to generate a driving signal according to a control signal output by the processor 70 and input the control terminal, and the transistor controls the location according to the driving signal. The two terminals are turned on and off.
  • the transistor 311 may be an IGBT, and the collector C and the emitter E are the two connection ends, and the gate electrode G is the control end.
  • the drive unit 315 may be an integrated circuit including a plurality of transistors.
  • An anti-interference circuit may be disposed between the transistor 311 and the driving unit 312.
  • the anti-interference circuit includes a Zener diode D1 and a resistor R1 disposed in parallel between the control terminal and the ground.
  • control signal is a level signal and is determined according to whether the resonant signal crosses zero or is close to zero voltage. For example, when the resonant signal falls past zero or near zero, the control signal is flipped from level to high.
  • the driving signal is also a level signal, and may be, for example, a level signal amplified or otherwise processed by the driving unit 312, and may also be low-powered when the control signal is turned from a low level to a high level. Flat flip to high level.
  • the transistor 311 turns on the two terminals when the control terminal receives a high level.
  • the second resonant module 22 is substantially identical in structure and principle to the first resonant module 21 and includes a parallel arrangement between the power module 11 and the second switch control module 32.
  • Heating coil L23 ie, inductance
  • capacitor C3 ie, capacitor
  • the second switch control module 32 is substantially the same in structure and principle as the first switch control module 31, and includes a transistor 321 and a driving unit 322.
  • the reference signal detection module 40 includes a plurality of voltage dividing elements (eg, voltage dividing resistors R3-R7) connected in series between the positive pole and the ground, the plurality of voltage dividing components
  • a pressure point (a connection point between two of the voltage dividing elements (i.e., a voltage dividing resistor R6 and a voltage dividing resistor R7) is connected to the processor 70.
  • the reference signal is divided and sampled by the voltage dividing component and input to the processor 70 for comparison with the resonant signal.
  • the reference signal detecting module 40 may further include a filter capacitor C4 connected in parallel with the voltage dividing resistor R7 and a diode D3 connected in series with the voltage dividing resistor R7 at the voltage end.
  • the adaptive module includes a first diode group 51 coupled to an output of the first resonant module 21 and a second diode group 52 coupled to an output of the second resonant module 22.
  • the first diode set 52 includes at least one forward biased diode connected in series.
  • the second diode group 52 includes at least one forward biased diode connected in series.
  • the first diode group 52 includes two diodes D3-D4 connected in series.
  • the second diode group 52 includes two diodes D5-D6 connected in series.
  • the first diode set 52 can include one or more diodes connected in series.
  • the second diode group 52 can also include one or more diodes connected in series.
  • a diode it is necessary to withstand a reverse voltage higher than 1000V.
  • the reverse voltage withstand capability of multiple diodes in series can reach 1000V or more.
  • the diode since the resonance frequency of the first resonance module 21 is too high (generally above 20 kHz), the diode employs a fast recovery diode.
  • the resonant signal detection module 60 includes a plurality of voltage dividing elements (eg, voltage dividing resistors R8-R15) connected in series between the adaptive module and ground, the plurality of voltage dividing components
  • the voltage dividing point (the connection point between the two of the voltage dividing elements (i.e., the voltage dividing resistor R14 and the voltage dividing resistor R15) is connected to the processor 70.
  • the resonant signal is divided and sampled by the voltage dividing component and input to the processor 70 for comparison with the reference signal.
  • the resonant signal detecting module 60 may further include a filter capacitor C5 connected in parallel with the voltage dividing resistor R15 and a diode D8 connected in series with the voltage dividing resistor R15 at the voltage end.
  • the processor 70 can be an integrated chip and can receive a specific signal, process, and generate a corresponding signal through a specific circuit structure and/or running a specific programming code.
  • the processor 70 includes a first control unit 71, a detection unit 72, and a second control unit 73.
  • the first control unit 71 is configured to issue a control signal to control the operation of the first resonance module 21 or the second resonance module 22.
  • the detecting unit 72 is configured to detect whether the resonant signal falls through the reference signal to determine whether the resonant signal crosses a zero point or approaches a zero point voltage.
  • the second control unit 73 is configured to control a switch control module corresponding to the working resonant module (for example, the first resonant module 21) when the resonant signal is zero crossing or close to a zero voltage (ie, the first The switch control module 31) is turned on.
  • the processor 70 and the control system of the electromagnetic resonance circuit 100 can be understood.
  • control method of the electromagnetic resonance circuit 100 includes:
  • S3 controlling a switch control module (ie, the first switch control module 31) corresponding to the working resonant module (for example, the first resonant module 21) to be turned on when the resonant signal is zero crossing or close to a zero voltage. .
  • a switch control module ie, the first switch control module 31
  • the working resonant module for example, the first resonant module 21
  • the working principle of the electromagnetic resonance circuit 100 will be described below by taking the first resonance module 21 as the working resonance module as an example.
  • the first resonant module 21 generates a resonant signal (resonant wave) 402 (a waveform diagram of point C in FIG. 1) when operating, and generates an induced voltage at the second resonant module 22, so that the second resonant module 22 also A resonant signal (resonant wave) 406 (a waveform diagram at point A in FIG. 1) is generated, but the resonant signal 404 of the second resonant module 22 lags behind the resonant signal 402 of the first resonant module 21.
  • FIG. 2 also shows the reference signal (approximate DC signal) 404 generated by the power module 10 (a waveform diagram of point D in FIG. 1).
  • the falling edge of the resonant signal 402 crosses the rising edge of the resonant signal 406 at point I, the resonant signal 402C intersects the reference signal 404 at point J, the rising edge of the resonant signal 402 and the resonance Signal 406 crosses at point K.
  • point B in FIG. 1 ie, the input terminal of the resonance signal detecting module 60
  • the voltage of the voltage is equal to the resonance voltage at point C.
  • the resonance voltage at point B the resonance voltage at point A.
  • the resonant voltage at point A and the resonant voltage at point C pass through the adaptive module, and are converted into a resonant voltage at point B, and the resonant voltage of B and the voltage at point D are respectively said resonant signal detecting module 60 and
  • the reference signal detecting module 40 detects (ie, steps down the voltage dividing element) and inputs the port corresponding to the processor 70. Since the resonance voltage at point B and the voltage at point D are reversed at point J, the detecting unit 72 judges that the resonance signal falls through the reference signal near the point J.
  • the second control unit 73 generally does not control the conduction of the first switch control module 31 at the point J, but
  • the detecting unit 72 starts to turn on the timing, and after counting the predetermined time t, determines whether the resonant signal crosses the zero point or approaches the zero point voltage.
  • the control turns on the first switch control module 31 to ensure that the transistor 311 is turned on and the The resonance of the first resonance module 21 is synchronized to prevent the transistor 311 from opening early, causing the transistor 311 to break down, and also avoiding the slow operation of the transistor 311 to affect the normal operation of the electromagnetic resonance circuit 100.
  • the turn-on and turn-off waveforms of the transistor 311 are shown as waveform 408.
  • the predetermined time t is 0.5-3 microseconds.
  • the predetermined time t is generally determined according to the specific characteristics of the rice cooker 100, and is not limited to the embodiment.
  • the resonance signal 406 can be detected by the resonance signal 406 due to the presence of the adaptive module.
  • the interference caused by the operation of module 60.
  • the intersection point I leads the intersection point J or with J.
  • the electromagnetic resonance circuit 200 of the second embodiment of the present invention is substantially the same as the electromagnetic resonance circuit 100, but the electromagnetic resonance circuit 200 includes an adaptive module and an adaptive module of the electromagnetic resonance circuit 100. different.
  • the electromagnetic resonance circuit 200 includes an adaptive module including a first controllable switch K1 and a second controllable switch K2.
  • the first controllable switch K1 is connected to the output end of the first resonant module 21 and the resonant signal detecting module 60
  • the second controllable switch K2 is connected to the second resonant module 22 and the resonant signal detecting Module 60.
  • the processor 70 is further configured to control on and off of the first controllable switch K1 and the second controllable switch K2.
  • the processor 70 is connected to the controllable switch corresponding to the working resonant module, that is, if the first resonant module 21 is working, the processor 70 is connected to the first controllable switch K1.
  • the second controllable switch K2 is disconnected.
  • the processor 70 communicates with the second controllable switch K2 to open the first controllable switch K1.
  • the adaptive module can also eliminate the interference caused by the resonant signal 406 to the operation of the resonant signal detecting module 60.
  • the first controllable switch K1 and the second controllable switch K2 may be mechanical switches or electronic switches, but may be controlled by the processor 70.
  • the electromagnetic resonance circuit 300 of the third embodiment of the present invention is substantially the same as the electromagnetic resonance circuit 100, but the electromagnetic resonance circuit 300 includes an adaptive module and an adaptive module of the electromagnetic resonance circuit 100. different.
  • the electromagnetic resonance circuit 300 includes an adaptive module including a first switching unit 51a and a second switching unit 52a.
  • the first switching unit 51a is connected to the output end of the first resonant module 21 and the resonant signal detecting module 60
  • the second switching unit 52a is connected to the second resonant module 22 and the resonant signal detecting module 60.
  • the first switch unit 51a includes a switch, and the switch includes two connection ends and a control end, and the two connection ends are respectively connected to an output end of the first resonance module and a ground, and the control end is respectively Connected to the processor, the processor is configured to control conduction or disconnection of the two terminals through the control terminal.
  • the resonance signal outputted from the output end of the first resonance module 21 is grounded. In this case, if the second resonance module 22 operates, the first resonance module The resonant signal of 21 does not affect the operation of the resonant signal detection module 60.
  • the switch is a transistor Q1
  • the first switch unit 51a includes a plurality of voltage dividing elements connected in series between the output end of the first resonant module 21 and the resonant signal detecting module 60 (for example, a voltage dividing resistor R8-R14, one of the connecting ends (for example, the collector C) of the transistor Q1 is connected between two predetermined voltage dividing elements (for example, between the voltage dividing resistor R13 and the voltage dividing resistor R14) The other end of the connection (for example, the emitter E is grounded), the control end of the transistor Q1 (for example, the base click B) is connected to the processor 70, and the processor 70 transmits a control signal (for example, VB1 in 6 controls the conduction or disconnection of the two terminals of the transistor Q1.
  • a control signal for example, VB1 in 6 controls the conduction or disconnection of the two terminals of the transistor Q1.
  • the second switch unit 52a has substantially the same structure, connection relationship and function as the first switch unit 51a, and details are not described herein.

Abstract

An electromagnetic resonant circuit (100), comprising a power source module (10), and a first resonance module (21) and a first switch control module (31) sequentially connected in series between an anode and a cathode of the power source module, a second resonance module (22) and a second switch control module (32) sequentially connected in series between the anode and the cathode, a reference signal detection module (40) connected to the anode and used to detect a reference signal output by the anode, self-adaptive modules (51, 52), a resonance signal detection module (60) connected to output ends of the first resonance module and the second resonance module via the self-adaptive modules, and a processor (70) connected to the reference signal detection module and the resonance signal detection module. The self-adaptive modules are used to control to select resonance signals of the output ends of the first resonance module or the second resonance module. The processor is used to determine, according to the reference signal and the resonance signal, whether the resonance signal crosses a zero point or approaches a zero-point voltage, and controls the conduction of the first switch control module or the second switch control module when the resonance signal crosses the zero point or approaches the zero-point voltage.

Description

电磁谐振电路、其控制方法及其控制系统Electromagnetic resonance circuit, control method thereof and control system thereof
优先权信息Priority information
本申请请求2014年12月17日向中国国家知识产权局提交的、专利申请号为201410789609.1的专利申请的优先权和权益，并且通过参照将其全文并入此处。Priority is claimed on Japanese Patent Application No. 2014-10789609.1, filed on Dec.
技术领域Technical field
本发明涉及电磁谐振技术领域，特别涉及一种电磁谐振电路、电磁谐振电路的控制方法及电磁谐振电路的控制系统。The invention relates to the technical field of electromagnetic resonance, in particular to an electromagnetic resonance circuit, a control method of the electromagnetic resonance circuit and a control system of the electromagnetic resonance circuit.
背景技术Background technique
目前，采用两个独立工作的线圈盘实现对锅具不同部位进行加热的电磁加热产品(如电饭煲、电磁炉等)，由于烹饪效果较好，得到了广泛普及。At present, two independent working coil coils are used to realize electromagnetic heating products (such as rice cookers, induction cookers, etc.) for heating different parts of the pot, which are widely popularized due to good cooking effect.
但是，在实际应用中，由于两个线圈盘的安装距离有限，其中一个线圈盘工作时会在另一个线圈盘上产生感应电压，在同步电压信号采样时，感应电压作为一个干扰源存在，使处理器对同步信号的判定出现错误，导致绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor, IGBT)导通出现异常，而且会出现IGBT击穿的问题。However, in practical applications, since the installation distance of the two coil disks is limited, one of the coil disks generates an induced voltage on the other coil disk, and the induced voltage exists as a source of interference when the synchronous voltage signal is sampled. The processor has an error in the determination of the synchronization signal, which causes an abnormality in the conduction of the insulated gate bipolar transistor (IGBT), and the problem of IGBT breakdown occurs.
发明内容Summary of the invention
本发明旨在至少解决现有技术中存在的技术问题之一。The present invention aims to solve at least one of the technical problems existing in the prior art.
根据本发明的实施方式的电磁谐振电路包括：An electromagnetic resonance circuit according to an embodiment of the present invention includes:
电源模块；Power module
依次串联设置于所述电源模块的正极及负极之间的第一谐振模块及第一开关控制模块；a first resonant module and a first switch control module disposed in series between the positive pole and the negative pole of the power module;
依次串联设置在所述正极及所述负极之间的第二谐振模块及第二开关控制模块；a second resonant module and a second switch control module disposed in series between the positive electrode and the negative electrode;
与所述正极连接的基准信号检测模块，用于检测所述正极输出的基准信号；a reference signal detecting module connected to the positive pole, configured to detect a reference signal output by the positive pole;
自适应模块；Adaptive module
通过所述自适应模块与所述第一谐振模块的输出端及所述第二谐振模块的输出端连接的谐振信号检测模块，所述自适应模块用于控制所述第一谐振模块或所述第二谐振模块的输出端的谐振信号；及 a resonant signal detecting module connected to the output end of the first resonant module and the output end of the second resonant module by the adaptive module, the adaptive module is configured to control the first resonant module or the a resonant signal at the output of the second resonant module; and
与所述基准信号检测模块及所述谐振信号检测模块连接的处理器，用于根据所述基准信号及所述谐振信号判断所述谐振信号是否过零点或接近零点电压，并在所述谐振信号过零点或接近零点时控制所述第一开关控制模块或所述第二开关控制模块导通。a processor connected to the reference signal detecting module and the resonant signal detecting module, configured to determine, according to the reference signal and the resonant signal, whether the resonant signal crosses a zero point or approaches a zero point voltage, and is at the resonant signal The first switch control module or the second switch control module is controlled to be turned on when the zero crossing or near zero.
在某些实施方式中，所述电源模块包括：In some embodiments, the power module includes:
交流电源；AC power supply;
与所述交流电源连接的整流电路，用于整流所述交流电源输出的交流电；及a rectifier circuit connected to the alternating current power source for rectifying an alternating current output of the alternating current power source; and
与所述整流电路连接的滤波电路，用于对整流后的电信号滤波，并输出所述基准信号。And a filter circuit connected to the rectifier circuit for filtering the rectified electrical signal and outputting the reference signal.
在某些实施方式中，所述第一谐振模块或所述第二谐振模块包括并联设置在所述电源模块与所述第一开关控制模块之间的加热线圈及电容。In some embodiments, the first resonant module or the second resonant module includes a heating coil and a capacitor disposed in parallel between the power module and the first switch control module.
在某些实施方式中，所述第一开关控制模块或所述第二开关控制模块包括：In some embodiments, the first switch control module or the second switch control module includes:
晶体管，所述晶体管包括分别与所述第一谐振模块及所述负极连接的两个连接端及控制端；及a transistor including two connection ends and a control end respectively connected to the first resonance module and the negative electrode;
与所述处理器及所述控制端连接的驱动单元，用于根据所述处理器输出的控制信号产生驱动信号并输入所述控制端，所述晶体管根据所述驱动信号控制所述两个连接端的导通及断开。a driving unit connected to the processor and the control end, configured to generate a driving signal according to a control signal output by the processor and input the control end, and the transistor controls the two connections according to the driving signal Turn on and off at the end.
在某些实施方式中，所述基准信号检测模块包括串联连接在所述正极与地之间的多个分压元件，特定两个所述分压元件之间的连接点连接至所述处理器。In some embodiments, the reference signal detection module includes a plurality of voltage dividing elements connected in series between the positive pole and the ground, and a connection point between the two of the voltage dividing elements is connected to the processor .
在某些实施方式中，所述自适应模块包括：In some embodiments, the adaptive module comprises:
连接所述第一谐振模块的输出端及所述谐振信号检测模块的第一二极管组，所述第一二极管组包括至少一个串联连接的二极管；及Connecting an output end of the first resonant module and a first diode group of the resonant signal detecting module, the first diode set including at least one diode connected in series;
连接所述第二谐振模块的输出端及所述谐振信号检测模块的第二二极管组，所述第二二极管组包括至少一个串联连接的二极管。Connecting an output of the second resonant module and a second diode set of the resonant signal detecting module, the second diode set comprising at least one diode connected in series.
在某些实施方式中，所述第一二极管组及所述第二二极管组能够承受高于1000伏以上的反向电压。In some embodiments, the first diode set and the second diode set are capable of withstanding a reverse voltage above 1000 volts.
在某些实施方式中，所述第一二极管组及所述第二二极管组的二极管为快恢复二极管。In some embodiments, the diodes of the first diode group and the second diode group are fast recovery diodes.
在某些实施方式中，所述自适应模块包括第一可控开关及第二可控开关；所述第 一可控开关连接所述第一谐振模块的输出端与所述谐振信号检测模块，所述第二可控开关连接所述第二谐振模块与所述谐振信号检测模块；所述处理器还用于控制所述第一可控开关及所述第二可控开关的通断。In some embodiments, the adaptive module includes a first controllable switch and a second controllable switch; a controllable switch is connected to the output end of the first resonant module and the resonant signal detecting module, and the second controllable switch is connected to the second resonant module and the resonant signal detecting module; And controlling on and off of the first controllable switch and the second controllable switch.
在某些实施方式中，所述第一可控开关及所述第二可控开关为机械开关或电子开关。In some embodiments, the first controllable switch and the second controllable switch are mechanical switches or electronic switches.
在某些实施方式中，所述自适应模块包括第一开关单元及第二开关单元；所述第一开关单元连接所述第一谐振模块的输出端与所述谐振信号检测模块，所述第二开关单元连接所述第二谐振模块与所述谐振信号检测模块；所述第一开关单元包括开关，所述开关包括两个连接端及控制端，所述两个连接端分别连接至所述第一谐振模块的输出端及地，所述控制端连接至所述处理器，所述处理器用于通过所述控制端控制所述两个连接端的导通或断开；所述第二开关单元包括开关，所述开关包括两个连接端及控制端，所述两个连接端分别连接至所述第二谐振模块的输出端及地，所述控制端连接至所述处理器，所述处理器用于通过所述控制端控制所述两个连接端的导通或断开。In some embodiments, the adaptive module includes a first switching unit and a second switching unit; the first switching unit is coupled to an output end of the first resonant module and the resonant signal detecting module, a second switching unit is connected to the second resonant module and the resonant signal detecting module; the first switching unit includes a switch, the switch includes two connecting ends and a control end, and the two connecting ends are respectively connected to the An output end of the first resonance module and the ground, the control end is connected to the processor, the processor is configured to control the conduction or disconnection of the two connection ends by the control end; the second switch unit Including a switch, the switch includes two connection ends and a control end, the two connection ends are respectively connected to an output end of the second resonance module and a ground, the control end is connected to the processor, and the processing The device is configured to control the conduction or disconnection of the two terminals through the control terminal.
在某些实施方式中，所述谐振信号检测模块包括串联连接在所述自适应模块与地之间的多个分压元件，所述多个分压元件的分压点连接至所述处理器。In some embodiments, the resonant signal detecting module includes a plurality of voltage dividing elements connected in series between the adaptive module and ground, and a voltage dividing point of the plurality of voltage dividing elements is connected to the processor .
本发明较佳实施方式的用于控制所述电磁谐振电路的控制系统包括：A control system for controlling the electromagnetic resonance circuit of a preferred embodiment of the present invention includes:
第一控制单元，用于控制所述第一谐振模块或所述第二谐振模块工作；a first control unit, configured to control the first resonant module or the second resonant module to operate;
检测单元，用于检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过零点或接近零点电压；及a detecting unit, configured to detect whether the resonant signal falls through the reference signal to determine whether the resonant signal crosses a zero point or approaches a zero point voltage;
第二控制单元，用于在所述谐振信号是否过零点或接近零点电压时控制工作的所述谐振模块对应的所述开关控制模块导通。And a second control unit, configured to be turned on by the switch control module corresponding to the resonant module that controls operation when the resonant signal is at or near a zero voltage.
本发明较佳实施方式的用于控制所述电磁谐振电路的控制方法包括：A control method for controlling the electromagnetic resonance circuit according to a preferred embodiment of the present invention includes:
控制所述第一谐振模块或所述第二谐振模块工作；Controlling the operation of the first resonance module or the second resonance module;
检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过零点或接近零点电压；及Detecting whether the resonant signal falls through the reference signal to determine whether the resonant signal is crossing zero or near zero; and
在所述确定谐振信号过零点或接近零点时控制工作的所述谐振模块对应的所述开关控制模块导通。The switch control module corresponding to the resonant module that controls operation when the zero crossing or near zero of the resonant signal is determined is turned on.
本发明较佳实施方式的用于控制所述电磁谐振电路的控制方法包括：A control method for controlling the electromagnetic resonance circuit according to a preferred embodiment of the present invention includes:
控制所述第一谐振模块或所述第二谐振模块工作；Controlling the operation of the first resonance module or the second resonance module;
检测所述谐振信号是否下降穿过所述基准信号并在所述谐振信号下降穿过所述基 准信号后开始计时预设时间；及Detecting whether the resonant signal falls through the reference signal and drops through the base at the resonant signal The preset time is started after the quasi-signal; and
在所述谐振信号下降穿过所述基准信号时后经历所述预设时间后，控制工作的所述谐振模块对应的所述开关控制模块导通。After the preset time is elapsed after the resonance signal falls through the reference signal, the switch control module corresponding to the resonant module that controls the operation is turned on.
在某些实施方式中，所述预设时间t的范围为0.5-3微秒。In some embodiments, the predetermined time t ranges from 0.5 to 3 microseconds.
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。The additional aspects and advantages of the invention will be set forth in part in the description which follows.
附图说明DRAWINGS
本发明的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from
图1是本发明第一实施方式的电磁谐振电路的示意图；1 is a schematic view of an electromagnetic resonance circuit according to a first embodiment of the present invention;
图2为本发明第一实施方式的电磁谐振电路的控制系统示意图；2 is a schematic diagram of a control system of an electromagnetic resonance circuit according to a first embodiment of the present invention;
图3为本发明第一实施方式的电磁谐振电路的控制方法的流程示意图；3 is a schematic flow chart of a method for controlling an electromagnetic resonance circuit according to a first embodiment of the present invention;
图4是本发明第一实施方式的电磁谐振电路的工作波形示意图；4 is a schematic diagram showing an operation waveform of an electromagnetic resonance circuit according to a first embodiment of the present invention;
图5是本发明第二实施方式的电磁谐振电路的示意图；及Figure 5 is a schematic view of an electromagnetic resonance circuit of a second embodiment of the present invention;
图6是本发明第三个实施方式的电磁谐振电路的示意图。Fig. 6 is a schematic view showing an electromagnetic resonance circuit of a third embodiment of the present invention.
具体实施方式detailed description
下面详细描述本发明的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.
在本发明的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通信；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的 具体含义。In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, or may be electrically connected or may communicate with each other; may be directly connected or indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship. For those skilled in the art, the above terms can be understood in the present invention according to specific circumstances. The specific meaning.
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may be repeated with reference to the numerals and/or reference numerals in the various examples, which are for the purpose of simplicity and clarity, and do not indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.
请参阅图1，本发明第一实施方式的电磁谐振电路100包括电源模块10、依次串联设置于所述电源模块10的正极(+)及负极(-)之间的第一谐振模块21及第一开关控制模块31、依次串联设置在所述正极及所述负极之间的第二谐振模块22及第二开关控制模块32、与所述正极连接的基准信号检测模块40、自适应模块、通过所述自适应模块与所述第一谐振模块21的输出端及所述第二谐振模块22的输出端连接的谐振信号检测模块60及处理器70。所述基准信号检测模块40用于检测所述正极输出的基准信号。所述自适应模块用于控制选择所述谐振信号检测模块60检测所述第一谐振模块21或所述第二谐振模块22输出的谐振信号。所述处理器70与所述基准信号检测模块40及所述谐振信号检测模块60连接，用于根据所述基准信号及所述谐振信号判断所述谐振信号是否过零点或接近零点电压，并在所述谐振信号下降穿过所述基准信号时，处理器计时延时，使谐振电压(IGBT引脚与电感连接的点)过零点或接近零点电压时，控制所述第一开关控制模块31或所述第二开关控制模块32导通。Referring to FIG. 1 , an electromagnetic resonant circuit 100 according to a first embodiment of the present invention includes a power module 10 , a first resonant module 21 and a first series connected in series between a positive electrode (+) and a negative electrode (−) of the power module 10 . a switch control module 31, a second resonant module 22 and a second switch control module 32 sequentially disposed in series between the positive pole and the negative pole, a reference signal detecting module 40 connected to the positive pole, an adaptive module, and a pass The adaptive module is coupled to the output of the first resonant module 21 and the output of the second resonant module 22 to the resonant signal detecting module 60 and the processor 70. The reference signal detecting module 40 is configured to detect a reference signal output by the positive pole. The adaptive module is configured to control selection of the resonant signal detecting module 60 to detect a resonant signal output by the first resonant module 21 or the second resonant module 22. The processor 70 is connected to the reference signal detecting module 40 and the resonant signal detecting module 60, and configured to determine, according to the reference signal and the resonant signal, whether the resonant signal crosses a zero point or approaches a zero point voltage, and When the resonant signal falls through the reference signal, the processor delays the delay, and when the resonant voltage (the point at which the IGBT pin is connected to the inductor) crosses the zero point or approaches the zero point voltage, the first switch control module 31 or The second switch control module 32 is turned on.
在某些实施方式中，所述电源模块10包括交流电源11、与所述交流电源11连接的整流电路12，用于整流所述交流电源11输出的交流电及与所述整流电路12连接的滤波电路13，用于对整流后的所述交流电滤波，并输出所述基准信号。In some embodiments, the power module 10 includes an AC power source 11 and a rectifier circuit 12 connected to the AC power source 11 for rectifying the AC power output by the AC power source 11 and filtering connected to the rectifier circuit 12. The circuit 13 is configured to filter the rectified alternating current and output the reference signal.
具体的，所述交流电源11可以是220伏、50赫兹的交流电。所述整流电路12可以是桥式电路。所述整流电路12输出的一端接地形成所述负极，另一端形成所述正极。所述滤波电路13可以包括设置于所述正极的电感L1及设置在所述正极及所述负极之间的电容C1，构成LC滤波电路，可以滤除整流后的电信号的谐波(噪声)。Specifically, the AC power source 11 can be an alternating current of 220 volts and 50 Hz. The rectifier circuit 12 can be a bridge circuit. One end of the output of the rectifier circuit 12 is grounded to form the negative electrode, and the other end forms the positive electrode. The filter circuit 13 may include an inductor L1 disposed on the positive electrode and a capacitor C1 disposed between the positive electrode and the negative electrode to form an LC filter circuit, which can filter harmonics (noise) of the rectified electrical signal. .
在某些实施方式中，所述第一谐振模块21包括并联设置在所述电源模块11与所述第一开关控制模块31之间的加热线圈L2(即电感)及电容C2。In some embodiments, the first resonant module 21 includes a heating coil L2 (ie, an inductor) and a capacitor C2 disposed in parallel between the power module 11 and the first switch control module 31.
所述加热线圈L2与所述电容C2构成的谐振电路与所述第一开关控制模块31串联所述正极及所述负极之间，并在所述第一开关控制模块31控制回路的导通及断开的变化中产生谐振。所述加热线圈L2因此产生高频交变磁场。当锅具靠近所述加热 线圈时，所述交变磁场中的磁通不仅在所述加热线圈L2中引起自感电动势，还会在所述锅具对应部分产生互感电动势，从而产生涡流而发热。a resonant circuit formed by the heating coil L2 and the capacitor C2 and the first switch control module 31 are connected in series between the positive pole and the negative pole, and the conduction of the control loop is performed in the first switch control module 31 and Resonance occurs in the change of disconnection. The heating coil L2 thus produces a high frequency alternating magnetic field. When the pot is close to the heating In the case of the coil, the magnetic flux in the alternating magnetic field not only causes a self-induced electromotive force in the heating coil L2, but also generates a mutual electromotive force in a corresponding portion of the pot, thereby generating eddy current and generating heat.
在某些实施方式中，所述第一开关控制模块31包括晶体管311及驱动单元312。所述晶体管311包括分别与所述第一谐振模块21及所述负极连接的两个连接端及控制端。所述驱动单元312与所述处理器70及所述控制端连接，用于根据所述处理器70输出的控制信号产生驱动信号并输入所述控制端，所述晶体管根据所述驱动信号控制所述两个连接端的导通及断开。In some embodiments, the first switch control module 31 includes a transistor 311 and a drive unit 312. The transistor 311 includes two connection ends and a control end respectively connected to the first resonance module 21 and the negative electrode. The driving unit 312 is connected to the processor 70 and the control terminal, and configured to generate a driving signal according to a control signal output by the processor 70 and input the control terminal, and the transistor controls the location according to the driving signal. The two terminals are turned on and off.
具体的，所述晶体管311可以为IGBT，且集电极C及发射极E为所述两个连接端，而门电极G为所述控制端。所述驱动单元315可以是包括多个晶体管的集成电路。所述晶体管311及所述驱动单元312之间还可以设置抗干扰电路。所述抗干扰电路包括并联设置在所述控制端及地之间的稳压管D1及电阻R1。Specifically, the transistor 311 may be an IGBT, and the collector C and the emitter E are the two connection ends, and the gate electrode G is the control end. The drive unit 315 may be an integrated circuit including a plurality of transistors. An anti-interference circuit may be disposed between the transistor 311 and the driving unit 312. The anti-interference circuit includes a Zener diode D1 and a resistor R1 disposed in parallel between the control terminal and the ground.
可以理解，所述控制信号为电平信号，并根据所述谐振信号是否过零点或接近零电压确定。例如，当所述谐振信号下降过零点或接近零点电压时，所述控制信号由电平翻转为高电平。所述驱动信号也为电平信号，例如可以是经所述驱动单元312放大或进行其他处理的电平信号，且也可以在所述控制信号由低电平翻转为高电平时也由低电平翻转为高电平。所述晶体管311在所述控制端接收到高电平时导通所述两个连接端。It can be understood that the control signal is a level signal and is determined according to whether the resonant signal crosses zero or is close to zero voltage. For example, when the resonant signal falls past zero or near zero, the control signal is flipped from level to high. The driving signal is also a level signal, and may be, for example, a level signal amplified or otherwise processed by the driving unit 312, and may also be low-powered when the control signal is turned from a low level to a high level. Flat flip to high level. The transistor 311 turns on the two terminals when the control terminal receives a high level.
在某些实施方式中，所述第二谐振模块22与所述第一谐振模块21结构及原理基本相同，并包括并联设置在所述电源模块11与所述第二开关控制模块32之间的加热线圈L23(即电感)及电容C3。In some embodiments, the second resonant module 22 is substantially identical in structure and principle to the first resonant module 21 and includes a parallel arrangement between the power module 11 and the second switch control module 32. Heating coil L23 (ie, inductance) and capacitor C3.
所述第二开关控制模块32与所述第一开关控制模块31结构及原理基本相同，并包括晶体管321及驱动单元322。The second switch control module 32 is substantially the same in structure and principle as the first switch control module 31, and includes a transistor 321 and a driving unit 322.
由于结构基本相同，此处不再赘述所述第二谐振单元22与所述第二开关控制模块32。Since the structures are substantially the same, the second resonating unit 22 and the second switch control module 32 are not described herein again.
在某些实施方式中，所述基准信号检测模块40包括串联连接在所述正极与地之间的多个分压元件(例如分压电阻R3-R7)，所述多个分压元件的分压点(特定两个所述分压元件之间(即分压电阻R6与分压电阻R7)的连接点)连接至所述处理器70。如此，所述基准信号经所述分压元件分压采样后输入所述处理器70，以与所述谐振信号作比较。In some embodiments, the reference signal detection module 40 includes a plurality of voltage dividing elements (eg, voltage dividing resistors R3-R7) connected in series between the positive pole and the ground, the plurality of voltage dividing components A pressure point (a connection point between two of the voltage dividing elements (i.e., a voltage dividing resistor R6 and a voltage dividing resistor R7) is connected to the processor 70. As such, the reference signal is divided and sampled by the voltage dividing component and input to the processor 70 for comparison with the resonant signal.
所述基准信号检测模块40还可以包括有与所述分压电阻R7并联接地的滤波电容C4及与所述分压电阻R7串联在电压端的二极管D3。 The reference signal detecting module 40 may further include a filter capacitor C4 connected in parallel with the voltage dividing resistor R7 and a diode D3 connected in series with the voltage dividing resistor R7 at the voltage end.
所述自适应模块包括与所述第一谐振模块21的输出端连接的第一二极管组51及与所述第二谐振模块22的输出端连接的第二二极管组52。所述第一二极管组52包括至少一个串联连接的正向偏置二极管。所述第二二极管组52包括至少一个串联连接的正向偏置二极管。The adaptive module includes a first diode group 51 coupled to an output of the first resonant module 21 and a second diode group 52 coupled to an output of the second resonant module 22. The first diode set 52 includes at least one forward biased diode connected in series. The second diode group 52 includes at least one forward biased diode connected in series.
本实施方式中，所述第一二极管组52包括两个串联连接的二极管D3-D4。所述第二二极管组52包括两个串联连接的二极管D5-D6。In this embodiment, the first diode group 52 includes two diodes D3-D4 connected in series. The second diode group 52 includes two diodes D5-D6 connected in series.
当然在其他实施方式中，所述第一二极管组52可以包括一个或两个以上的串联连接的二极管。所述第二二极管组52也可以包括一个或两个以上的串联连接的二极管。在使用一个二极管时，需要能够承受高于1000V以上的反向电压，在使用多个二极管时，保证多个二极管串联后的反向耐压能力能够达到1000V以上。Of course, in other embodiments, the first diode set 52 can include one or more diodes connected in series. The second diode group 52 can also include one or more diodes connected in series. When using a diode, it is necessary to withstand a reverse voltage higher than 1000V. When using multiple diodes, it is guaranteed that the reverse voltage withstand capability of multiple diodes in series can reach 1000V or more.
另外，由于所述第一谐振模块21的谐振频率过高(一般在20千赫兹以上)，因此，所述二极管采用快恢复二极管。In addition, since the resonance frequency of the first resonance module 21 is too high (generally above 20 kHz), the diode employs a fast recovery diode.
在某些实施方式中，所述谐振信号检测模块60包括串联连接在所述自适应模块与地之间的多个分压元件(例如分压电阻R8-R15)，所述多个分压元件的分压点(特定两个所述分压元件之间(即分压电阻R14与分压电阻R15)的连接点)连接至所述处理器70。如此，所述谐振信号经所述分压元件分压采样后输入所述处理器70，以与所述基准信号作比较。In some embodiments, the resonant signal detection module 60 includes a plurality of voltage dividing elements (eg, voltage dividing resistors R8-R15) connected in series between the adaptive module and ground, the plurality of voltage dividing components The voltage dividing point (the connection point between the two of the voltage dividing elements (i.e., the voltage dividing resistor R14 and the voltage dividing resistor R15) is connected to the processor 70. As such, the resonant signal is divided and sampled by the voltage dividing component and input to the processor 70 for comparison with the reference signal.
所述谐振信号检测模块60还可以包括有与所述分压电阻R15并联接地的滤波电容C5及与所述分压电阻R15串联在电压端的二极管D8。The resonant signal detecting module 60 may further include a filter capacitor C5 connected in parallel with the voltage dividing resistor R15 and a diode D8 connected in series with the voltage dividing resistor R15 at the voltage end.
请参阅图2，在某些实施方式中，所述处理器70可以为集成芯片，并可通过特定的电路结构及/或运行特定的编程代码，接收特定的信号、处理并产生对应的信号。例如所述处理器70包括第一控制单元71、检测单元72及第二控制单元73。Referring to FIG. 2, in some embodiments, the processor 70 can be an integrated chip and can receive a specific signal, process, and generate a corresponding signal through a specific circuit structure and/or running a specific programming code. For example, the processor 70 includes a first control unit 71, a detection unit 72, and a second control unit 73.
所述第一控制单元71用于发出控制信号，控制所述第一谐振模块21或所述第二谐振模块22工作。所述检测单元72用于检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过零点或接近零点电压。所述第二控制单元73用于在所述谐振信号是否过零点或接近零点电压时控制所述工作谐振模块(例如为所述第一谐振模块21)对应的开关控制模块(即所述第一开关控制模块31)导通。The first control unit 71 is configured to issue a control signal to control the operation of the first resonance module 21 or the second resonance module 22. The detecting unit 72 is configured to detect whether the resonant signal falls through the reference signal to determine whether the resonant signal crosses a zero point or approaches a zero point voltage. The second control unit 73 is configured to control a switch control module corresponding to the working resonant module (for example, the first resonant module 21) when the resonant signal is zero crossing or close to a zero voltage (ie, the first The switch control module 31) is turned on.
可以理解，所述处理器70及所述电磁谐振电路100的控制系统。The processor 70 and the control system of the electromagnetic resonance circuit 100 can be understood.
请参阅图3，所述电磁谐振电路100的控制方法包括：Referring to FIG. 3, the control method of the electromagnetic resonance circuit 100 includes:
S1：控制所述第一谐振模块21或所述第二谐振模块22工作；S1: controlling the first resonant module 21 or the second resonant module 22 to operate;
S2：检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过 零点或接近零点电压；S2: detecting whether the resonant signal falls through the reference signal to determine whether the resonant signal has passed Zero or near zero voltage;
S3：在所述谐振信号是否过零点或接近零点电压时控制所述工作谐振模块(例如为所述第一谐振模块21)对应的开关控制模块(即所述第一开关控制模块31)导通。S3: controlling a switch control module (ie, the first switch control module 31) corresponding to the working resonant module (for example, the first resonant module 21) to be turned on when the resonant signal is zero crossing or close to a zero voltage. .
请参阅图4，以下以所述第一谐振模块21为所述工作谐振模块为例进行说明所述电磁谐振电路100的工作原理。Referring to FIG. 4, the working principle of the electromagnetic resonance circuit 100 will be described below by taking the first resonance module 21 as the working resonance module as an example.
所述第一谐振模块21工作时产生谐振信号(谐振波)402(图1中C点的波形示意图)，并在所述第二谐振模块22产生感应电压，从而所述第二谐振模块22也产生谐振信号(谐振波)406(图1中A点的波形示意图)，但是所述第二谐振模块22的谐振信号404滞后于所述第一谐振模块21的谐振信号402。另外，图2还显示了所述电源模块10产生的所述基准信号(近似直流信号)404(图1中D点的波形示意图)。The first resonant module 21 generates a resonant signal (resonant wave) 402 (a waveform diagram of point C in FIG. 1) when operating, and generates an induced voltage at the second resonant module 22, so that the second resonant module 22 also A resonant signal (resonant wave) 406 (a waveform diagram at point A in FIG. 1) is generated, but the resonant signal 404 of the second resonant module 22 lags behind the resonant signal 402 of the first resonant module 21. In addition, FIG. 2 also shows the reference signal (approximate DC signal) 404 generated by the power module 10 (a waveform diagram of point D in FIG. 1).
所述谐振信号402的下降沿与所述谐振信号406的上升沿交叉于I点，所述谐振信号402C与所述基准信号404交叉于J点，所述谐振信号402的上升沿与所述谐振信号406交叉于K点。由于所述第一二极管组51及所述第二二极管组52的正向偏置特性，在K-I时间内，图1中的B点(即所述谐振信号检测模块60的输入端)的电压等于C点的谐振电压，在I-K时间内，B点的谐振电压＝A点的谐振电压。The falling edge of the resonant signal 402 crosses the rising edge of the resonant signal 406 at point I, the resonant signal 402C intersects the reference signal 404 at point J, the rising edge of the resonant signal 402 and the resonance Signal 406 crosses at point K. Due to the forward biasing characteristics of the first diode group 51 and the second diode group 52, point B in FIG. 1 (ie, the input terminal of the resonance signal detecting module 60) during KI time The voltage of the voltage is equal to the resonance voltage at point C. In the IK time, the resonance voltage at point B = the resonance voltage at point A.
也即是说，A点的谐振电压和C点的谐振电压经过所述自适应模块后，转换成B点的谐振电压，B的谐振电压跟D点的电压分别所述谐振信号检测模块60及所述基准信号检测模块40检测(即经分压元件降压)后输入处理器70对应的端口。因为B点的谐振电压与D点的电压在J点发生翻转，所以所述检测单元72判断所述谐振信号在J点附近下降穿过所述基准信号。That is to say, the resonant voltage at point A and the resonant voltage at point C pass through the adaptive module, and are converted into a resonant voltage at point B, and the resonant voltage of B and the voltage at point D are respectively said resonant signal detecting module 60 and The reference signal detecting module 40 detects (ie, steps down the voltage dividing element) and inputs the port corresponding to the processor 70. Since the resonance voltage at point B and the voltage at point D are reversed at point J, the detecting unit 72 judges that the resonance signal falls through the reference signal near the point J.
考虑到所述基准信号存在谐波，为消除可能由此引起的误差，一般的所述第二控制单元73不会在J点即刻控制导通所述第一开关控制模块31，而是所述检测单元72开始开启计时，计时到预定时间t后，确定所述谐振信号是否过零点或接近零点电压，此时控制导通所述第一开关控制模块31，确保所述晶体管311开通与所述第一谐振模块21的谐振同步，避免所述晶体管311开通过早而导致所述晶体管311击穿，同时也避免所述晶体管311开通过慢而影响所述电磁谐振电路100的正常工作。如图2所示，所述晶体管311的开通与断开波形图如波形408所示。Considering that there is a harmonic in the reference signal, in order to eliminate the error that may be caused thereby, the second control unit 73 generally does not control the conduction of the first switch control module 31 at the point J, but The detecting unit 72 starts to turn on the timing, and after counting the predetermined time t, determines whether the resonant signal crosses the zero point or approaches the zero point voltage. At this time, the control turns on the first switch control module 31 to ensure that the transistor 311 is turned on and the The resonance of the first resonance module 21 is synchronized to prevent the transistor 311 from opening early, causing the transistor 311 to break down, and also avoiding the slow operation of the transistor 311 to affect the normal operation of the electromagnetic resonance circuit 100. As shown in FIG. 2, the turn-on and turn-off waveforms of the transistor 311 are shown as waveform 408.
所述预定时间t为0.5-3微秒。The predetermined time t is 0.5-3 microseconds.
可以理解，所述预定时间t一般根据所述电饭煲100的具体特性而定，并不限于本实施方式。It can be understood that the predetermined time t is generally determined according to the specific characteristics of the rice cooker 100, and is not limited to the embodiment.
而由于所述自适应模块的存在，可以消除所述谐振信号406对所述谐振信号检测 模块60的工作造成的干扰。The resonance signal 406 can be detected by the resonance signal 406 due to the presence of the adaptive module. The interference caused by the operation of module 60.
当然，假若所述第二谐振模块22没有磁场感应或者磁场感应小，导致所述谐振信号406远滞后与所述谐振信号402甚至不存在，则交叉点I点超前于交叉点J点或者与J点重叠，所述谐振信号406不会对所述谐振信号检测模块60的工作造成干扰。Of course, if the second resonance module 22 has no magnetic field induction or the magnetic field induction is small, and the resonance signal 406 is far behind and the resonance signal 402 does not even exist, the intersection point I leads the intersection point J or with J. The points overlap, and the resonant signal 406 does not interfere with the operation of the resonant signal detection module 60.
请参阅图5，本发明第二实施方式的电磁谐振电路200与所述电磁谐振电路100基本相同，但所述电磁谐振电路200包括的自适应模组与所述电磁谐振电路100的自适应模块不同。本实施方式中，所述电磁谐振电路200包括的自适应模组包括第一可控开关K1及第二可控开关K2。所述第一可控开关K1连接所述第一谐振模块21的输出端与所述谐振信号检测模块60，所述第二可控开关K2连接所述第二谐振模块22与所述谐振信号检测模块60。所述处理器70还用于控制所述第一可控开关K1及所述第二可控开关K2的通断。具体的，所述处理器70连通工作的谐振模块对应的可控开关，也即是说，假若所述第一谐振模块21工作，则所述处理器70连通所述第一可控开关K1，断开所述第二可控开关K2。相反，假若所述第二谐振模块22工作，则所述处理器70连通所述第二可控开关K2，断开所述第一可控开关K1。Referring to FIG. 5, the electromagnetic resonance circuit 200 of the second embodiment of the present invention is substantially the same as the electromagnetic resonance circuit 100, but the electromagnetic resonance circuit 200 includes an adaptive module and an adaptive module of the electromagnetic resonance circuit 100. different. In this embodiment, the electromagnetic resonance circuit 200 includes an adaptive module including a first controllable switch K1 and a second controllable switch K2. The first controllable switch K1 is connected to the output end of the first resonant module 21 and the resonant signal detecting module 60, and the second controllable switch K2 is connected to the second resonant module 22 and the resonant signal detecting Module 60. The processor 70 is further configured to control on and off of the first controllable switch K1 and the second controllable switch K2. Specifically, the processor 70 is connected to the controllable switch corresponding to the working resonant module, that is, if the first resonant module 21 is working, the processor 70 is connected to the first controllable switch K1. The second controllable switch K2 is disconnected. Conversely, if the second resonant module 22 is operational, the processor 70 communicates with the second controllable switch K2 to open the first controllable switch K1.
如此，所述自适应模块同样可以消除所述谐振信号406对所述谐振信号检测模块60的工作造成的干扰。As such, the adaptive module can also eliminate the interference caused by the resonant signal 406 to the operation of the resonant signal detecting module 60.
所述第一可控开关K1及所述第二可控开关K2可以是机械开关或者电子开关，但都可以被所述处理器70所控制。The first controllable switch K1 and the second controllable switch K2 may be mechanical switches or electronic switches, but may be controlled by the processor 70.
请参阅图6，本发明第三实施方式的电磁谐振电路300与所述电磁谐振电路100基本相同，但所述电磁谐振电路300包括的自适应模组与所述电磁谐振电路100的自适应模块不同。本实施方式中，所述电磁谐振电路300包括的自适应模组包括第一开关单元51a及第二开关单元52a。所述第一开关单元51a连接所述第一谐振模块21的输出端与所述谐振信号检测模块60，所述第二开关单元52a连接所述第二谐振模块22与所述谐振信号检测模块60。Referring to FIG. 6, the electromagnetic resonance circuit 300 of the third embodiment of the present invention is substantially the same as the electromagnetic resonance circuit 100, but the electromagnetic resonance circuit 300 includes an adaptive module and an adaptive module of the electromagnetic resonance circuit 100. different. In the embodiment, the electromagnetic resonance circuit 300 includes an adaptive module including a first switching unit 51a and a second switching unit 52a. The first switching unit 51a is connected to the output end of the first resonant module 21 and the resonant signal detecting module 60, and the second switching unit 52a is connected to the second resonant module 22 and the resonant signal detecting module 60. .
具体的，所述第一开关单元51a包括开关，所述开关包括两个连接端及控制端，所述两个连接端分别连接至所述第一谐振模块的输出端及地，所述控制端连接至所述处理器，所述处理器用于通过所述控制端控制所述两个连接端的导通或断开。Specifically, the first switch unit 51a includes a switch, and the switch includes two connection ends and a control end, and the two connection ends are respectively connected to an output end of the first resonance module and a ground, and the control end is respectively Connected to the processor, the processor is configured to control conduction or disconnection of the two terminals through the control terminal.
当所述两个连接端导通，则所述第一谐振模块21的输出端输出的谐振信号被接地，在此情况下，若所述第二谐振模块22工作，则所述第一谐振模块21的谐振信号不会影响所述谐振信号检测模块60的工作。 When the two connection ends are turned on, the resonance signal outputted from the output end of the first resonance module 21 is grounded. In this case, if the second resonance module 22 operates, the first resonance module The resonant signal of 21 does not affect the operation of the resonant signal detection module 60.
在本实施方式中，所述开关为三极管Q1，所述第一开关单元51a包括多个串联在所述第一谐振模块21的输出端与所述谐振信号检测模块60之间的分压元件(例如分压电阻R8-R14，所述三极管Q1的一个所述连接端(例如集电极C)连接至预定两个所述分压元件之间(例如分压电阻R13与分压电阻R14之间)，另一个所述连接端(例如为发射极E接地)，所述三极管Q1的控制端(例如为基点击B)与所述处理器70连接，所述处理器70通过发送控制信号(例如图6中的VB1)控制所述三极管Q1的两个连接端的导通或断开。In this embodiment, the switch is a transistor Q1, and the first switch unit 51a includes a plurality of voltage dividing elements connected in series between the output end of the first resonant module 21 and the resonant signal detecting module 60 ( For example, a voltage dividing resistor R8-R14, one of the connecting ends (for example, the collector C) of the transistor Q1 is connected between two predetermined voltage dividing elements (for example, between the voltage dividing resistor R13 and the voltage dividing resistor R14) The other end of the connection (for example, the emitter E is grounded), the control end of the transistor Q1 (for example, the base click B) is connected to the processor 70, and the processor 70 transmits a control signal (for example, VB1 in 6 controls the conduction or disconnection of the two terminals of the transistor Q1.
所述第二开关单元52a与所述第一开关单元51a具有基本相同的结构、连接关系及功能，在此不再赘述。The second switch unit 52a has substantially the same structure, connection relationship and function as the first switch unit 51a, and details are not described herein.
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
尽管已经示出和描述了本发明的实施方式，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。 While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims (16)

  1. 一种电磁谐振电路，其特征在于，包括：An electromagnetic resonance circuit, comprising:
    电源模块；Power module
    依次串联设置于所述电源模块的正极及负极之间的第一谐振模块及第一开关控制模块；a first resonant module and a first switch control module disposed in series between the positive pole and the negative pole of the power module;
    依次串联设置在所述正极及所述负极之间的第二谐振模块及第二开关控制模块；a second resonant module and a second switch control module disposed in series between the positive electrode and the negative electrode;
    与所述正极连接的基准信号检测模块，用于检测所述正极输出的基准信号；a reference signal detecting module connected to the positive pole, configured to detect a reference signal output by the positive pole;
    自适应模块；Adaptive module
    通过所述自适应模块与所述第一谐振模块的输出端及所述第二谐振模块的输出端连接的谐振信号检测模块，所述自适应模块用于控制选择所述第一谐振模块或所述第二谐振模块的输出端的谐振信号；及a resonant signal detecting module connected to the output end of the first resonant module and the output end of the second resonant module by the adaptive module, wherein the adaptive module is configured to control selection of the first resonant module or Resonant signal at the output of the second resonant module; and
    与所述基准信号检测模块及所述谐振信号检测模块连接的处理器，用于根据所述基准信号及所述谐振信号判断所述谐振信号是否过零点或接近零点电压，并在所述谐振信号过零点或接近零点时控制所述第一开关控制模块或所述第二开关控制模块导通。a processor connected to the reference signal detecting module and the resonant signal detecting module, configured to determine, according to the reference signal and the resonant signal, whether the resonant signal crosses a zero point or approaches a zero point voltage, and is at the resonant signal The first switch control module or the second switch control module is controlled to be turned on when the zero crossing or near zero.
  2. 如权利要求1所述的电磁谐振电路，其特征在于，所述电源模块包括：The electromagnetic resonance circuit according to claim 1, wherein said power supply module comprises:
    交流电源；AC power supply;
    与所述交流电源连接的整流电路，用于整流所述交流电源输出的交流电；及a rectifier circuit connected to the alternating current power source for rectifying an alternating current output of the alternating current power source; and
    与所述整流电路连接的滤波电路，用于对整流后的电信号滤波，并输出所述基准信号。And a filter circuit connected to the rectifier circuit for filtering the rectified electrical signal and outputting the reference signal.
  3. 如权利要求1所述的电磁谐振电路，其特征在于，所述第一谐振模块或所述第二谐振模块包括并联设置在所述电源模块与所述第一开关控制模块之间的加热线圈及电容。The electromagnetic resonance circuit according to claim 1, wherein said first resonance module or said second resonance module comprises a heating coil disposed in parallel between said power module and said first switch control module capacitance.
  4. 如权利要求1所述的电磁谐振电路，其特征在于，所述第一开关控制模块或所述第二开关控制模块包括：The electromagnetic resonance circuit according to claim 1, wherein the first switch control module or the second switch control module comprises:
    晶体管，所述晶体管包括分别与所述第一谐振模块及所述负极连接的两个连接端及控制端；及a transistor including two connection ends and a control end respectively connected to the first resonance module and the negative electrode;
    与所述处理器及所述控制端连接的驱动单元，用于根据所述处理器输出的控制信 号产生驱动信号并输入所述控制端，所述晶体管根据所述驱动信号控制所述两个连接端的导通及断开。a driving unit connected to the processor and the control end, for controlling a signal output according to the processor The driving signal is generated and input to the control terminal, and the transistor controls conduction and disconnection of the two connection terminals according to the driving signal.
  5. 如权利要求1所述的电磁谐振电路，其特征在于，所述基准信号检测模块包括串联连接在所述正极与地之间的多个分压元件，特定两个所述分压元件之间的连接点连接至所述处理器。The electromagnetic resonance circuit according to claim 1, wherein said reference signal detecting module comprises a plurality of voltage dividing elements connected in series between said positive electrode and ground, between two specific said voltage dividing elements A connection point is connected to the processor.
  6. 如权利要求1所述的电磁谐振电路，其特征在于，所述自适应模块包括：The electromagnetic resonance circuit of claim 1 wherein said adaptive module comprises:
    连接所述第一谐振模块的输出端及所述谐振信号检测模块的第一二极管组，所述第一二极管组包括至少一个串联连接的二极管；及Connecting an output end of the first resonant module and a first diode group of the resonant signal detecting module, the first diode set including at least one diode connected in series;
    连接所述第二谐振模块的输出端及所述谐振信号检测模块的第二二极管组，所述第二二极管组包括至少一个串联连接的二极管。Connecting an output of the second resonant module and a second diode set of the resonant signal detecting module, the second diode set comprising at least one diode connected in series.
  7. 如权利要求6所述的电磁谐振电路，其特征在于，所述第一二极管组及所述第二二极管组能够承受高于1000伏以上的反向电压。The electromagnetic resonance circuit according to claim 6, wherein said first diode group and said second diode group are capable of withstanding a reverse voltage higher than 1000 volts.
  8. 如权利要求6所述的电磁谐振电路，其特征在于，所述第一二极管组及所述第二二极管组的二极管为快恢复二极管。The electromagnetic resonance circuit according to claim 6, wherein the diodes of said first diode group and said second diode group are fast recovery diodes.
  9. 如权利要求1所述的电磁谐振电路，其特征在于，所述自适应模块包括第一可控开关及第二可控开关；所述第一可控开关连接所述第一谐振模块的输出端与所述谐振信号检测模块，所述第二可控开关连接所述第二谐振模块与所述谐振信号检测模块；所述处理器还用于控制所述第一可控开关及所述第二可控开关的通断。The electromagnetic resonance circuit according to claim 1, wherein said adaptive module comprises a first controllable switch and a second controllable switch; said first controllable switch being coupled to an output of said first resonant module And the resonant signal detecting module, the second controllable switch is connected to the second resonant module and the resonant signal detecting module; the processor is further configured to control the first controllable switch and the second Controllable switch on and off.
  10. 如权利要求1所述的电磁谐振电路，其特征在于，所述第一可控开关及所述第二可控开关为机械开关或电子开关。The electromagnetic resonance circuit according to claim 1, wherein said first controllable switch and said second controllable switch are mechanical switches or electronic switches.
  11. 如权利要求1所述的电磁谐振电路，其特征在于，所述自适应模块包括第一开关单元及第二开关单元；所述第一开关单元连接所述第一谐振模块的输出端与所述谐振信号检测模块，所述第二开关单元连接所述第二谐振模块与所述谐振信号检测模块；所述第一开关单元包括开关，所述开关包括两个连接端及控制端，所述两个连接端分别连接至所述第一谐振模块的输出端及地，所述控制端连接至所述处理器，所述处理器用于通过所述控制端控制所述两个连接端的导通或断开；所述第二开关单元包括开关，所述开关包括两个连接端及控制端，所述两个连接端分别连接至所述第二谐振模块的输出端及地，所述控制端连接至所述处理器，所述处理器用于通过所述控制端控制所述两个连接端的导通或断开。 The electromagnetic resonance circuit according to claim 1, wherein said adaptive module comprises a first switching unit and a second switching unit; said first switching unit is connected to an output of said first resonant module and said a resonant signal detecting module, the second switching unit is connected to the second resonant module and the resonant signal detecting module; the first switching unit comprises a switch, the switch comprises two connecting ends and a control end, the two Connected to the output end of the first resonant module and the ground, the control end is connected to the processor, and the processor is configured to control the conduction or the disconnection of the two connecting ends by the control end The second switch unit includes a switch, the switch includes two connection ends and a control end, the two connection ends are respectively connected to an output end of the second resonance module and a ground, and the control end is connected to The processor is configured to control, by the control terminal, to be turned on or off by the two terminals.
  12. 如权利要求1所述的电磁谐振电路，其特征在于，所述谐振信号检测模块包括串联连接在所述自适应模块与地之间的多个分压元件，所述多个分压元件的分压点连接至所述处理器。The electromagnetic resonance circuit according to claim 1, wherein said resonance signal detecting module comprises a plurality of voltage dividing elements connected in series between said adaptive module and ground, said plurality of voltage dividing elements A pressure point is connected to the processor.
  13. 一种用于控制如权利要求1-12任意一项所述的电磁谐振电路的控制系统，其特征在于，所述控制系统包括：A control system for controlling an electromagnetic resonance circuit according to any one of claims 1 to 12, wherein the control system comprises:
    第一控制单元，用于控制所述第一谐振模块或所述第二谐振模块工作；a first control unit, configured to control the first resonant module or the second resonant module to operate;
    检测单元，用于检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过零点或接近零点电压；及a detecting unit, configured to detect whether the resonant signal falls through the reference signal to determine whether the resonant signal crosses a zero point or approaches a zero point voltage;
    第二控制单元，用于在所述谐振信号是否过零点或接近零点电压时控制工作的所述谐振模块对应的所述开关控制模块导通。And a second control unit, configured to be turned on by the switch control module corresponding to the resonant module that controls operation when the resonant signal is at or near a zero voltage.
  14. 一种用于控制如权利要求1-12任意一项所述的电磁谐振电路的控制方法，其特征在于，所述控制方法包括：A control method for controlling an electromagnetic resonance circuit according to any one of claims 1 to 12, wherein the control method comprises:
    控制所述第一谐振模块或所述第二谐振模块工作；Controlling the operation of the first resonance module or the second resonance module;
    检测所述谐振信号是否下降穿过所述基准信号从而确定所述谐振信号是否过零点或接近零点电压；及Detecting whether the resonant signal falls through the reference signal to determine whether the resonant signal is crossing zero or near zero; and
    在所述确定谐振信号过零点或接近零点时控制工作的所述谐振模块对应的所述开关控制模块导通。The switch control module corresponding to the resonant module that controls operation when the zero crossing or near zero of the resonant signal is determined is turned on.
  15. 一种用于控制如权利要求1-12任意一项所述的电磁谐振电路的控制方法，其特征在于，所述控制方法包括：A control method for controlling an electromagnetic resonance circuit according to any one of claims 1 to 12, wherein the control method comprises:
    控制所述第一谐振模块或所述第二谐振模块工作；Controlling the operation of the first resonance module or the second resonance module;
    检测所述谐振信号是否下降穿过所述基准信号并在所述谐振信号下降穿过所述基准信号后开始计时预设时间；及Detecting whether the resonant signal falls through the reference signal and starts counting for a preset time after the resonant signal falls through the reference signal; and
    在所述谐振信号下降穿过所述基准信号时后经历所述预设时间后，控制工作的所述谐振模块对应的所述开关控制模块导通。After the preset time is elapsed after the resonance signal falls through the reference signal, the switch control module corresponding to the resonant module that controls the operation is turned on.
  16. 一种如权利要求15所述的控制方法，其特征在于，所述预设时间t的范围为0.5-3微秒。 A control method according to claim 15, wherein said preset time t ranges from 0.5 to 3 microseconds.
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