CN108574481B - Electronic induction switch circuit, electronic induction switch system and power supply circuit - Google Patents
Electronic induction switch circuit, electronic induction switch system and power supply circuit Download PDFInfo
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- CN108574481B CN108574481B CN201710147594.2A CN201710147594A CN108574481B CN 108574481 B CN108574481 B CN 108574481B CN 201710147594 A CN201710147594 A CN 201710147594A CN 108574481 B CN108574481 B CN 108574481B
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- 230000006698 induction Effects 0.000 title claims abstract description 144
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- 230000005291 magnetic effect Effects 0.000 claims description 45
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/90—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0036—Means reducing energy consumption
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/945—Proximity switches
- H03K2217/95—Proximity switches using a magnetic detector
- H03K2217/954—Ferromagnetic case
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Abstract
Description
技术领域Technical field
本发明涉及一种开关装置,特别是一种汽车充电用开关装置。The present invention relates to a switch device, in particular to a switch device for automobile charging.
背景技术Background technique
为了响应节能环保的要求,电动汽车越来越多的应用于生产生活中。电动汽车采用电池作为动力来源。因而,电动汽车每隔一定使用时间就需要进行充电。一般而言,电动汽车采用充电枪进行充电。而开关则是充电枪的重要部件。现有技术中的汽车充电用开关往往为机械开关,机械开关通过直接接触实现开关的通断,这种方式存在寿命有限、精度不高等缺点。In order to respond to the requirements of energy conservation and environmental protection, electric vehicles are increasingly used in production and life. Electric vehicles use batteries as their power source. Therefore, electric vehicles need to be charged every certain period of time. Generally speaking, electric vehicles use charging guns for charging. The switch is an important part of the charging gun. The car charging switches in the prior art are often mechanical switches. The mechanical switch realizes the switching on and off of the switch through direct contact. This method has shortcomings such as limited service life and low accuracy.
发明内容Contents of the invention
本发明的目的之一是为了克服现有技术中的不足,提供一种响应于磁场变化的汽车充电用电磁开关的供电和工作电路,具体技术方案如下:One of the purposes of the present invention is to overcome the deficiencies in the prior art and provide a power supply and working circuit for an electromagnetic switch for automobile charging that responds to magnetic field changes. The specific technical solution is as follows:
一种电子感应开关电路,用于感测联动开关的行程或位置,其特征在于包括:分离电路,所述分离电路接收PWM脉冲信号,所述PWM脉冲信号包括正相PWM脉冲和负相PWM脉冲,所述分离电路根据所述正相PWM脉冲产生正相直流电压,所述分离电路根据所述负相PWM脉冲产生负相直流电压;感应电路,用于感应联动开关的行程或位置来产生位置感应信号,所述感应电路使用所述负相直流电压作为工作电压;控制电路,所述控制电路使用所述负相直流电压作为工作电压,控制所述感应电路的工作方式,以减小其功耗;开关电路,所述开关电路使用所述正相直流电压作为工作电压,接收所述位置感应信号,并根据所接收到的所述位置感应信号输出闭合或断开信号。An electronic induction switch circuit used to sense the stroke or position of a linkage switch, which is characterized by including: a separation circuit, the separation circuit receives a PWM pulse signal, and the PWM pulse signal includes a positive phase PWM pulse and a negative phase PWM pulse. , the separation circuit generates a positive phase DC voltage according to the positive phase PWM pulse, the separation circuit generates a negative phase DC voltage according to the negative phase PWM pulse; the induction circuit is used to sense the stroke or position of the linkage switch to generate a position Induction signal, the induction circuit uses the negative-phase DC voltage as a working voltage; a control circuit, the control circuit uses the negative-phase DC voltage as a working voltage to control the working mode of the induction circuit to reduce its power Consumption; switch circuit, the switch circuit uses the positive-phase DC voltage as the operating voltage, receives the position sensing signal, and outputs a closing or opening signal according to the received position sensing signal.
如前文所述的电子感应开关电路,所述控制电路控制所述感应电路的工作方式,使之在第一模式和第二模式下工作;在所述第一模式下,所述感应电路具有第一工作电流和第一工作时间;在所述第二模式下,所述感应电路具有第二工作电流和第二工作时间。As in the electronic induction switch circuit described above, the control circuit controls the working mode of the induction circuit to operate in the first mode and the second mode; in the first mode, the induction circuit has a third An operating current and a first operating time; in the second mode, the sensing circuit has a second operating current and a second operating time.
如前文所述的电子感应开关电路,所述第一模式为工作模式,所述感应电路在所述工作模式时,感测联动开关的行程或位置信号;所述第二模式为待机模式,所述感应电路在所述待机模式时不工作。As in the electronic induction switch circuit described above, the first mode is the working mode, and the induction circuit senses the stroke or position signal of the linkage switch in the working mode; the second mode is the standby mode, so The sensing circuit does not work in the standby mode.
如前文所述的电子感应开关电路,所述第一工作电流大于所述第二工作电流;所述第一工作时间小于所述第二工作时间。As in the electronic induction switch circuit described above, the first operating current is greater than the second operating current; the first operating time is less than the second operating time.
如前文所述的电子感应开关电路,所述第一工作电流和所述第一工作时间分别为4mA和40us;所述第二工作电流和所述第二工作时间分别为13uA和100ms。As in the electronic induction switch circuit described above, the first working current and the first working time are 4mA and 40us respectively; the second working current and the second working time are 13uA and 100ms respectively.
如前文所述的电子感应开关电路,所述所述分离电路包括:第一整流电路,所述第一整流电路包括第一电阻、第一二极管和第一电容;所述第一电阻的第一端接收PWM脉冲信号,所述第一电阻的第二端连接所述第一二极管的正极;所述第一二极管的负极连接所述第一电容的第一端并形成第一公共连接点;所述第一电容的第二端接地;所述第一公共连接点为所述正相直流电压的输出端;第二整流电路,所述第二整流电路包括第二电阻、第二二极管、第二电容和第三二极管;所述第二电阻的第一端接收PWM脉冲信号,所述第二电阻的第二端连接所述第二二极管的负极;所述第二二极管的正极连接所述第二电容的第一端;所述第二电容的第二端连接所述第三二极管的正极,所述第三二极管的负极为所述负相直流电压的输出端。As in the electronic induction switch circuit described above, the separation circuit includes: a first rectifier circuit, the first rectifier circuit includes a first resistor, a first diode and a first capacitor; the first resistor The first end receives the PWM pulse signal, the second end of the first resistor is connected to the anode of the first diode; the cathode of the first diode is connected to the first end of the first capacitor and forms a third A common connection point; the second end of the first capacitor is grounded; the first common connection point is the output end of the positive-phase DC voltage; a second rectifier circuit, the second rectifier circuit includes a second resistor, a second diode, a second capacitor and a third diode; the first end of the second resistor receives the PWM pulse signal, and the second end of the second resistor is connected to the cathode of the second diode; The anode of the second diode is connected to the first end of the second capacitor; the second end of the second capacitor is connected to the anode of the third diode, and the cathode of the third diode is The output terminal of the negative phase DC voltage.
如前文所述的电子感应开关电路,所述第一电阻、第一电容和第一二极管构成滤波整流电路。As in the electronic induction switch circuit described above, the first resistor, the first capacitor and the first diode constitute a filter rectifier circuit.
如前文所述的电子感应开关电路,所述第二电阻、第二电容和第二二极管构成滤波整流电路。As in the electronic induction switch circuit described above, the second resistor, the second capacitor and the second diode constitute a filter rectifier circuit.
如前文所述的电子感应开关电路,所述感应电路包括:霍尔感应单元,所述控制电路控制所述霍尔感应单元的工作状态。As in the electronic induction switch circuit described above, the induction circuit includes a Hall induction unit, and the control circuit controls the working state of the Hall induction unit.
如前文所述的电子感应开关电路,所述霍尔感应单元的接收所述第三二极管的负极输出的负相直流电压;所述霍尔感应单元感测联动开关运动,并产生所述位置感应信号。As in the electronic induction switch circuit described above, the Hall induction unit receives the negative phase DC voltage output from the negative electrode of the third diode; the Hall induction unit senses the movement of the linkage switch and generates the Position sensing signal.
如前文所述的电子感应开关电路,所述开关电路包括:场效应管;所述场效应管包括栅极、源极和漏极;所述场效应管的栅极同时连接所述感应电路的输出端和所述第一整流电路的第一二极管的负极,接收所述感应电路的位置感应信号和所述第一整流电路输出的正相直流电压;所述场效应管的源极接地;所述场效应管的漏极接状态指示电路,所述状态指示电路用于在所述场效应管导通时输出第一状态值,在所述场效应管截止时输出第二状态值。The electronic induction switch circuit as described above, the switch circuit includes: a field effect transistor; the field effect transistor includes a gate, a source and a drain; the gate of the field effect transistor is simultaneously connected to the induction circuit The output end and the cathode of the first diode of the first rectifier circuit receive the position sensing signal of the induction circuit and the positive phase DC voltage output by the first rectifier circuit; the source of the field effect transistor is grounded ; The drain of the field effect transistor is connected to a status indication circuit, and the status indication circuit is used to output a first status value when the field effect transistor is turned on, and output a second status value when the field effect transistor is turned off.
如前文所述的电子感应开关电路,所述正相直流电压为所述场效应管的栅极触发高电平。As in the electronic induction switch circuit described above, the positive-phase DC voltage is the gate triggering high level of the field effect transistor.
如前文所述的电子感应开关电路,所述状态指示电路包括:第四电阻和第五电阻;所述第四电阻和第五电阻串联连接;所述场效应管的漏极连接在所述第四电阻和所述第五电阻之间。As in the electronic induction switch circuit described above, the status indication circuit includes: a fourth resistor and a fifth resistor; the fourth resistor and the fifth resistor are connected in series; the drain of the field effect transistor is connected to the first between the fourth resistor and the fifth resistor.
如前文所述的电子感应开关电路,所述第四电阻的第一端与所述第五电阻的第一端相连,以形成两者之间的第二公共连接点;所述第四电阻的第二端为状态指示电路的输出端,所述第五电阻的第二端接地;所述场效应管的漏极连接在所述第四电阻和所述第五电阻之间的第二公共连接点相连。As in the electronic induction switch circuit described above, the first end of the fourth resistor is connected to the first end of the fifth resistor to form a second common connection point between the two; The second end is the output end of the status indication circuit, the second end of the fifth resistor is connected to ground; the drain of the field effect transistor is connected to the second common connection between the fourth resistor and the fifth resistor. The dots are connected.
如前文所述的电子感应开关电路,所述第一状态值为第四电阻的电阻值;所述第二状态值为第四电阻和第五电阻串联后的电阻值。As in the electronic induction switch circuit described above, the first state value is the resistance value of the fourth resistor; the second state value is the resistance value of the fourth resistor and the fifth resistor connected in series.
如前文所述的电子感应开关电路,还包括:第四二极管和第五二极管;所述第四二极管的正极连接所述第一公共连接点,第四二极管的正极的负极连接所述场效应管的栅极;所述第五二极管的负极连接在所述第四二极管的负极和所述场效应管的栅极的公共连接点之间;所述第五二极管的正极接地。The electronic induction switch circuit as mentioned above also includes: a fourth diode and a fifth diode; the anode of the fourth diode is connected to the first common connection point, and the anode of the fourth diode is connected to the first common connection point. The cathode of the fifth diode is connected to the gate of the field effect transistor; the cathode of the fifth diode is connected between the cathode of the fourth diode and the common connection point of the gate of the field effect transistor; The anode of the fifth diode is connected to ground.
如前文所述的电子感应开关电路,还包括:第六二极管,用于防止来自于所述状态指示电路的输出端的电压浪涌破坏所述场效应管的漏极;所述第六二极管的负极连接在所述第四电阻的第二端;所述第六二极管的正极接地。The electronic induction switch circuit as described above further includes: a sixth diode, used to prevent the voltage surge from the output end of the status indicating circuit from damaging the drain of the field effect transistor; The cathode of the diode is connected to the second end of the fourth resistor; the anode of the sixth diode is connected to ground.
如前文所述的电子感应开关电路,联动开关上设有磁铁装置,所述磁铁装置随着联动开关的操作会朝着所述霍尔感应单元接近或远离;所述霍尔感应单元感应所述磁铁装置由行程或位置的变化而产生的磁场的变化,产生所述位置感应信号。As in the electronic induction switch circuit described above, the linkage switch is provided with a magnet device, and the magnet device will approach or move away from the Hall induction unit as the linkage switch is operated; the Hall induction unit senses the The change in the magnetic field generated by the change in stroke or position of the magnet device generates the position sensing signal.
如前文所述的电子感应开关电路,所述PWM脉冲信号是从车辆充电插头中的控制引导电路信号。As in the electronic induction switch circuit described above, the PWM pulse signal is a control guidance circuit signal from the vehicle charging plug.
如前文所述的电子感应开关电路,所述述正相占空比信号和所述负相占空比信号的占空比是互补的。As in the electronic induction switch circuit described above, the duty ratios of the positive-phase duty cycle signal and the negative-phase duty cycle signal are complementary.
如前文所述的电子感应开关电路,所述正相PWM脉冲的占空比为13.5%;所述负相PWM脉冲的占空比为86.5%。As in the electronic induction switch circuit described above, the duty cycle of the positive-phase PWM pulse is 13.5%; the duty cycle of the negative-phase PWM pulse is 86.5%.
如前文所述的电子感应开关电路,所述控制引导电路的PWM脉冲信号输出同时连接车辆上的负载。As with the electronic induction switch circuit described above, the PWM pulse signal output of the control guidance circuit is simultaneously connected to the load on the vehicle.
本发明的目的之二是提供一种电子感应开关系统,包括:如前文所述的电子感应开关电路;The second object of the present invention is to provide an electronic induction switch system, including: the electronic induction switch circuit as mentioned above;
联动开关,所述联动开关相对所述电子感应开关电路可运动地设置;所述联动开关上固定设有磁铁装置,所述磁铁装置随着所述联动开关运动,并相对所述电子感应开关电路具有接近和远离位置;和所述感应电路感应所述磁铁装置运动而产生的磁场的变化,并产生位置感应信号。A linkage switch, the linkage switch is movably arranged relative to the electronic induction switch circuit; a magnet device is fixed on the linkage switch, and the magnet device moves with the linkage switch and is relative to the electronic induction switch circuit It has close and far away positions; and the induction circuit senses changes in the magnetic field generated by the movement of the magnet device and generates a position sensing signal.
本发明的目的之三是提一供电电路,包括:The third object of the present invention is to provide a power supply circuit, including:
分离电路,所述分离电路接收PWM脉冲信号,所述PWM脉冲信号包括正相PWM脉冲和负相PWM脉冲,所述分离电路根据所述正相PWM脉冲产生正相直流电压,所述分离电路根据所述负相PWM脉冲产生负相直流电压;控制电路,所述控制电路使用所述负相直流电压作为工作电压,控制一感应电路的工作方式,以减小其功耗。A separation circuit, the separation circuit receives a PWM pulse signal, the PWM pulse signal includes a positive phase PWM pulse and a negative phase PWM pulse, the separation circuit generates a positive phase DC voltage according to the positive phase PWM pulse, the separation circuit is based on The negative-phase PWM pulse generates a negative-phase DC voltage; a control circuit uses the negative-phase DC voltage as a working voltage to control the working mode of an induction circuit to reduce its power consumption.
如前文所述的供电电路,所述控制电路向感应电路发出控制信号,控制感应电路在第一模式和第二模式下工作;感应电路接收到第一状态的控制信号处于第一模式;感应电路接收到第二状态的控制信号处于第二模式。As in the power supply circuit described above, the control circuit sends a control signal to the induction circuit to control the induction circuit to work in the first mode and the second mode; the induction circuit receives the control signal of the first state and is in the first mode; the induction circuit The control signal receiving the second state is in the second mode.
如前文所述的供电电路,在所述第一模式下,所述感应电路具有第一工作电流和第一工作时间;在所述第二模式下,所述感应电路具有第二工作电流和第二工作时间;所述第一状态的控制信号持续的时间为所述感应电路的第一工作时间;所述第二状态的控制信号持续的时间为所述感应电路的第二工作时间。As in the power supply circuit described above, in the first mode, the induction circuit has a first operating current and a first operating time; in the second mode, the induction circuit has a second operating current and a first operating time. Two working times; the duration of the control signal in the first state is the first working time of the induction circuit; the duration of the control signal in the second state is the second working time of the induction circuit.
如前文所述的供电电路,所述第一模式为工作模式,所述感应电路在所述工作模式时,感测所述联动开关的行程或位置信号;所述第二模式为待机模式,所述感应电路在所述待机模式时不工作。As in the power supply circuit described above, the first mode is the working mode, and the induction circuit senses the stroke or position signal of the linkage switch in the working mode; the second mode is the standby mode, so The sensing circuit does not work in the standby mode.
如前文所述的供电电路,所述第一工作电流小于所述第二工作电流;As in the power supply circuit described above, the first operating current is smaller than the second operating current;
所述第一工作时间小于所述第二工作时间。The first working time is less than the second working time.
如前文所述的供电电路,所述第一工作电流和所述第一工作时间分别为4mA和40us;As in the power supply circuit described above, the first operating current and the first operating time are 4mA and 40us respectively;
所述第二工作电流和所述第二工作时间分别为13uA和100ms。The second operating current and the second operating time are 13uA and 100ms respectively.
本发明采用分离电路从车辆充电插头中的控制引导电路中摄取PWM脉冲信号,将PWM脉冲信号中的正相PWM脉冲和负相PWM脉冲分离成正相直流电压和负相直流电压,用其中的正相直流电压给开关电路供电,用其中的负相直流电压给感测磁铁装置运动的感应电路供电,并通过感应电路控制电路来控制感应电路,使其处于工作模式或是待机模式以减小功耗,使其在能够正常感测磁铁装置的运动的同时,还不影响控制引导电路的正常负载工作。本发明采用电磁元件作为充电枪的感应开关以替代机械式开关,具有较长的使用寿命,同时可以感测微小距离的开关运动变化,提高开关的感测精度;本发明的电子感应开关电路能够在不需要额外供电电源的情况下,摄取充电枪中控制引导电路中的PWM脉冲信号作为开关系统的供电电力,同时不影响控制引导电路的正常工作,具备极大的兼容性,同时还具有在复杂电磁环境下的抗干扰能力。The present invention uses a separation circuit to absorb the PWM pulse signal from the control guidance circuit in the vehicle charging plug, separates the positive phase PWM pulse and the negative phase PWM pulse in the PWM pulse signal into a positive phase DC voltage and a negative phase DC voltage, and uses the positive phase PWM pulse and the negative phase PWM pulse in the PWM pulse signal. The phase DC voltage supplies power to the switching circuit, and the negative phase DC voltage is used to power the induction circuit that senses the movement of the magnet device, and the induction circuit is controlled through the induction circuit control circuit to make it in working mode or standby mode to reduce power. consumption, so that it can normally sense the movement of the magnet device without affecting the normal load operation of the control and guidance circuit. The present invention uses electromagnetic elements as the induction switch of the charging gun to replace the mechanical switch, which has a longer service life. At the same time, it can sense the change of switch movement at a small distance and improve the sensing accuracy of the switch. The electronic induction switch circuit of the present invention can Without the need for an additional power supply, the PWM pulse signal in the control and guidance circuit in the charging gun is taken as the power supply for the switching system. At the same time, it does not affect the normal operation of the control and guidance circuit. It has great compatibility and also has the ability to Anti-interference ability in complex electromagnetic environment.
附图说明Description of drawings
图1为本发明的电子开关的机械布局结构示意图;Figure 1 is a schematic diagram of the mechanical layout structure of the electronic switch of the present invention;
图2为本发明电子感应开关电路的逻辑结构示意图;Figure 2 is a schematic diagram of the logic structure of the electronic induction switch circuit of the present invention;
图3为本发明感应电路控制电路产生的控制信号波形示意图;Figure 3 is a schematic diagram of the control signal waveform generated by the induction circuit control circuit of the present invention;
图4A为本发明的PWM脉冲信号波形图;Figure 4A is a PWM pulse signal waveform diagram of the present invention;
图4B为正相直流电压的波形图;Figure 4B is a waveform diagram of the positive-phase DC voltage;
图4C为负相直流电压的波形图;Figure 4C is a waveform diagram of the negative phase DC voltage;
图5为本发明电子感应开关电路的电器元件结构示意图。Figure 5 is a schematic structural diagram of the electrical components of the electronic induction switch circuit of the present invention.
具体实施方式Detailed ways
下面将参考构成本说明书一部分的附图对本发明的各种具体实施方式进行描述。应该理解的是,虽然在本发明中使用表示方向的术语,诸如“前”、“后”、“上”、“下”、“左”、“右”等描述本发明的各种示例结构部分和元件,但是在此使用这些术语只是为了方便说明的目的,基于附图中显示的示例方位而确定的。由于本发明所公开的实施例可以按照不同的方向设置,所以这些表示方向的术语只是作为说明而不应视作为限制。在可能的情况下,本发明中使用的相同或者相类似的附图标记指的是相同的部件。Various embodiments of the present invention will be described below with reference to the accompanying drawings, which form a part of this specification. It should be understood that although terms indicating directions are used herein, such as "front," "rear," "upper," "lower," "left," "right," etc., to describe various example structural parts of the present invention. and elements, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Since the disclosed embodiments of the present invention may be arranged in different directions, these directional terms are for illustration only and should not be considered limiting. Wherever possible, the same or similar reference numbers used in this disclosure refer to the same parts.
图1为本发明的电子感应开关的机械布局结构示意图。Figure 1 is a schematic diagram of the mechanical layout structure of the electronic induction switch of the present invention.
本发明为设置在车辆充电插头安装壳10(图中未视出)内的电子感应开关组件100,电子感应开关组件100主要包括可活动地转动的支撑件40、设置在支撑件40上的磁体50构成的联动开关101,以及下方设置在电路板28上的磁性开关组件20和其他电路元件。The present invention is an electronic induction switch assembly 100 disposed in a vehicle charging plug installation shell 10 (not shown in the figure). The electronic induction switch assembly 100 mainly includes a movably rotating support member 40 and a magnet provided on the support member 40 The linkage switch 101 composed of 50, as well as the magnetic switch assembly 20 and other circuit components provided on the circuit board 28 below.
在支撑件40的中部位置设置有转动轴19,转动轴19用于支撑支撑件40,并使得支撑件40可实现转动。支撑件40的左端下方具有保持部46,磁体50设置于支撑件40的保持部46。支撑件40的右端设置有受力部44。受力部44用于承受外部压力,以驱动支撑件40相对于安装壳10转动。受力部44与抵顶部42彼此反向转动地设置。也即是,在汽车充电开关101与对配插座插接配合的方向上,支撑件40的前端、后端彼此反向转动地设置。受力部44受压而靠近安装壳10时,抵顶部42反向转动至远离安装壳10。当人力按压受力部44实现开关的断开或是闭合操作时,支撑件40沿着转动轴19转动时,保持部46相对于磁性开关组件20可靠近及远离地运动。A rotating shaft 19 is provided at the middle position of the supporting member 40. The rotating shaft 19 is used to support the supporting member 40 and enable the supporting member 40 to rotate. The support 40 has a holding portion 46 below the left end, and the magnet 50 is provided in the holding portion 46 of the support 40 . The right end of the support member 40 is provided with a force receiving portion 44 . The force-receiving portion 44 is used to withstand external pressure to drive the support member 40 to rotate relative to the installation shell 10 . The force-receiving portion 44 and the resisting portion 42 are arranged to rotate in opposite directions to each other. That is, in the direction in which the car charging switch 101 is plugged into the mating socket, the front end and the rear end of the support member 40 are arranged to rotate in opposite directions to each other. When the force-receiving portion 44 is pressed and approaches the installation shell 10 , the top portion 42 rotates reversely to move away from the installation shell 10 . When the force-receiving part 44 is pressed manually to realize the opening or closing operation of the switch, and the support member 40 rotates along the rotation axis 19 , the holding part 46 can move closer to and farther away from the magnetic switch assembly 20 .
磁性开关组件20,又可称之为磁控开关组件,其为一种依据磁场信号而控制相应线路(或电子元件)开关的器件。磁性开关组件20设置为依据检测到的磁场强度的变化而导通或断开。可以想到的是,在磁体50靠近、远离的过程中,从而使得到达磁性开关组件20的磁场强度发生变化。磁性开关组件20的具体种类、规格及开关动作原理只要能够实现依据相应的磁场强度的变化实现对应的导通或断开即可。譬如,在磁体50靠近磁性开关组件20至某一预设位置时,磁性开关组件20检测到的磁场强度增强至导通阈值,从而进行导通动作;在磁体50远离磁性开关组件20至另一预设位置时,磁性开关组件20检测到的磁场强度减弱至断开阈值,从而进行电路的断开动作。The magnetic switch assembly 20, which can also be called a magnetically controlled switch assembly, is a device that controls the switching of corresponding circuits (or electronic components) based on magnetic field signals. The magnetic switch assembly 20 is configured to be turned on or off according to the detected change in magnetic field strength. It is conceivable that when the magnet 50 moves closer and farther away, the intensity of the magnetic field reaching the magnetic switch assembly 20 changes. The specific type, specifications and switching action principle of the magnetic switch assembly 20 only need to be able to achieve corresponding conduction or disconnection according to changes in corresponding magnetic field intensity. For example, when the magnet 50 approaches the magnetic switch assembly 20 to a certain preset position, the magnetic field intensity detected by the magnetic switch assembly 20 increases to a conduction threshold, thereby performing a conduction action; when the magnet 50 moves away from the magnetic switch assembly 20 to another At the preset position, the magnetic field intensity detected by the magnetic switch assembly 20 weakens to the disconnection threshold, thereby disconnecting the circuit.
为了便利于实现开关操作及提升反应精度,磁性开关组件20包括磁场传感器25。磁场传感器25亦可称之为磁性传感器,或磁感测元件。磁场传感器25用于感应磁场强度。在本实施例中,磁场传感器25用于感应磁体50的提供的磁场强度。磁场传感器25具体规格及种类只要能够满足感应磁场强度即可。磁场传感器25可以为磁阻传感器,或位置传感器。在本实施例中,磁场传感器25为霍尔传感器,或霍尔开关。进一步地,磁场传感器25设置在电路板28上。磁场传感器25与电路板28电连接,并将相应的感应到的信号传输至电路板28。In order to facilitate switch operation and improve response accuracy, the magnetic switch assembly 20 includes a magnetic field sensor 25 . The magnetic field sensor 25 can also be called a magnetic sensor or a magnetic sensing element. The magnetic field sensor 25 is used to sense the strength of the magnetic field. In this embodiment, the magnetic field sensor 25 is used to sense the strength of the magnetic field provided by the magnet 50 . The specific specifications and types of the magnetic field sensor 25 only need to meet the intensity of the induced magnetic field. The magnetic field sensor 25 may be a magnetoresistive sensor, or a position sensor. In this embodiment, the magnetic field sensor 25 is a Hall sensor or a Hall switch. Further, the magnetic field sensor 25 is provided on the circuit board 28 . The magnetic field sensor 25 is electrically connected to the circuit board 28 and transmits corresponding sensed signals to the circuit board 28 .
为了进一步提升磁性开关组件20的反应精度、准确度,汽车充电用开关101还包括铁磁件60。铁磁件60采用铁磁材料制成。也即是,铁磁件60没有受磁场的作用时,其分子电流所产生的合成磁矩在宏观上等于零,因而不呈现磁性,而当受到磁场作用下,内部分子磁矩排列整齐的过程而磁化。铁磁件60用于将自磁体50引出的磁力线引入磁性开关组件20。In order to further improve the response precision and accuracy of the magnetic switch assembly 20 , the car charging switch 101 also includes a ferromagnetic component 60 . The ferromagnetic part 60 is made of ferromagnetic material. That is to say, when the ferromagnetic component 60 is not affected by a magnetic field, the synthetic magnetic moment generated by its molecular current is macroscopically equal to zero, so it does not exhibit magnetism. However, when it is affected by a magnetic field, the internal molecular magnetic moments are arranged neatly. magnetization. The ferromagnetic component 60 is used to introduce the magnetic field lines drawn from the magnet 50 into the magnetic switch assembly 20 .
本发明将申请人在与本申请同一申请日申请的另一发明名称为“汽车充电用开关及汽车充电连接器”(内部案号为P251-TE-CN)的专利申请的全部技术方案引用到本发明中。磁场传感器25以及电路板28上的电子感应开关组件100的其他电子器件的电路图见图2。The present invention cites all the technical solutions of another patent application titled "Automobile Charging Switch and Automobile Charging Connector" (internal case number: P251-TE-CN) filed by the applicant on the same filing date as this application. in the present invention. A circuit diagram of the magnetic field sensor 25 and other electronic components of the electronic induction switch assembly 100 on the circuit board 28 is shown in FIG. 2 .
图2为本发明电子感应开关电路的逻辑结构示意图;Figure 2 is a schematic diagram of the logic structure of the electronic induction switch circuit of the present invention;
欲实现前文电子感应开关组件100的正常工作,需给电子感应开关组件100的各部件供电,但为了避免在车辆充电插头内另增加一路供电线路作为电力供给,本发明设计的电子感应开关电路200直接摄取车辆充电插头中用作通讯线路的控制引导电路205(Control Piolot,简称CP线路)上的PWM脉冲信号输出作为电力来源,控制引导电路205的电力或来源于充电桩上的电源电路209,本用于连接车辆上的负载206,并通过PWM脉冲信号输出的通断来传输信号。本发明在使用控制引导电路205额外给电子感应开关组件100供电时,不能影响到控制引导电路205对负载206的供电。故而减小电子感应开关组件100的耗电部件的功耗也是本发明的需要解决的问题之一。In order to realize the normal operation of the electronic induction switch assembly 100 mentioned above, power needs to be supplied to each component of the electronic induction switch assembly 100. However, in order to avoid adding another power supply line as a power supply in the vehicle charging plug, the electronic induction switch circuit 200 designed by the present invention Directly ingest the PWM pulse signal output on the control pilot circuit 205 (Control Piolot, CP line for short) used as a communication line in the vehicle charging plug as a power source. The power of the control pilot circuit 205 may come from the power circuit 209 on the charging pile. This is used to connect the load 206 on the vehicle and transmit the signal through the on and off of the PWM pulse signal output. When the present invention uses the control and guidance circuit 205 to provide additional power to the electronic induction switch assembly 100, it cannot affect the power supply of the control and guidance circuit 205 to the load 206. Therefore, reducing the power consumption of the power-consuming components of the electronic induction switch assembly 100 is also one of the problems that needs to be solved in the present invention.
如图2所示,图1中的联动开关101中的支撑件40和磁体50在图2中简化示意,支撑件40围绕转动轴19旋转并带动磁体50上下运动。电子感应开关电路200包括分离电路210、感应电路201、感应电路控制电路202和开关电路230。As shown in FIG. 2 , the support member 40 and the magnet 50 in the linkage switch 101 in FIG. 1 are simplified in FIG. 2 . The support member 40 rotates around the rotation axis 19 and drives the magnet 50 to move up and down. The electronic induction switch circuit 200 includes a separation circuit 210, an induction circuit 201, an induction circuit control circuit 202 and a switch circuit 230.
分离电路210为电力采集和供电电路,接收控制引导电路205提供的PWM脉冲信号,PWM脉冲信号本身包括不同占空比的正相PWM脉冲402和负相PWM脉冲401(见图4A),分离电路210包括第一整流电路和第二整流电路(见图5),第一整流电路根据正相PWM脉冲402产生正相直流电压411,第二整流电路根据负相PWM脉冲401产生负相直流电压412(见图4B和图4C)。The separation circuit 210 is a power collection and power supply circuit that receives the PWM pulse signal provided by the control guidance circuit 205. The PWM pulse signal itself includes positive-phase PWM pulses 402 and negative-phase PWM pulses 401 with different duty ratios (see Figure 4A). The separation circuit 210 includes a first rectifier circuit and a second rectifier circuit (see Figure 5). The first rectifier circuit generates a positive-phase DC voltage 411 based on the positive-phase PWM pulse 402, and the second rectifier circuit generates a negative-phase DC voltage 412 based on the negative-phase PWM pulse 401. (See Figure 4B and Figure 4C).
感应电路201,设有图1中的磁场传感器25,感应联动开关101中的的磁体50行程或位置变化来产生位置感应信号;感应电路201连接第二整流电路使用负相直流电压412作为工作电压;The induction circuit 201 is provided with the magnetic field sensor 25 in Figure 1, which senses the stroke or position change of the magnet 50 in the linkage switch 101 to generate a position sensing signal; the induction circuit 201 is connected to the second rectifier circuit and uses the negative phase DC voltage 412 as the operating voltage. ;
感应电路控制电路202用于控制感应电路201,感应电路控制电路202连接第二整流电路使用负相直流电压412作为工作电压,并控制感应电路201的工作方式处于工作模式或是休眠模式(见图3),以减小其功耗;The induction circuit control circuit 202 is used to control the induction circuit 201. The induction circuit control circuit 202 is connected to the second rectifier circuit and uses the negative phase DC voltage 412 as the working voltage, and controls the working mode of the induction circuit 201 to be in the working mode or the sleep mode (see figure) 3), to reduce its power consumption;
开关电路230,开关电路230连接第一整流电路使用正相直流电压411作为工作电压,并连接感应电路201接收位置感应信号,并根据所接收到的位置感应信号闭合或断开(具体工作原理和电路结构见图5)。The switch circuit 230 is connected to the first rectifier circuit and uses the positive-phase DC voltage 411 as the operating voltage, and is connected to the induction circuit 201 to receive the position sensing signal, and is closed or opened according to the received position sensing signal (specific working principle and The circuit structure is shown in Figure 5).
开关电路230连接连接确认电路237,通过连接确认电路237感测开关电路230的电阻值来判断联动开关101处于闭合或断开状态。The switch circuit 230 is connected to the connection confirmation circuit 237, and the connection confirmation circuit 237 senses the resistance value of the switch circuit 230 to determine whether the linkage switch 101 is in a closed or open state.
图3为本发明感应电路控制电路产生的控制信号波形示意图;Figure 3 is a schematic diagram of the control signal waveform generated by the induction circuit control circuit of the present invention;
先如图2所示,感应电路控制电路202的连接控制感应电路201,感应电路控制电路202通过输出控制信号来实现对感应电路201工作方式的控制。如图3所示为感应电路控制电路202产生的控制信号波形示意图,感应电路201接收到图中第一状态的控制信号,即波形301段信号时处于第一模式即工作状态,接收到波形302段信号处于第二模式即待机状态,波形301(高电平)持续的时间为t1,感应电路201接收到图中第二状态的控制信号,即波形302(低电平)持续的时间为t2。在工作状态下,感应电路201具有第一工作电流4mA和第一工作时间t1:40us;在待机状态下,感应电路201具有第二工作电流13uA和第二工作时间t2:100ms。如此循环往复。可以得知,第一工作时间远小于第二工作时间,使得感应电路201的实际工作状态时间相对于休眠状态极短,其电能消耗大为降低。但感应电路201的工作状态和待机状态的切换频率远大于车辆充电插头的联动开关101断开或是闭合的频率,所以这种分时工作状态不影响对联动开关101工作状态的感测。As shown in FIG. 2 , the connection of the induction circuit control circuit 202 controls the induction circuit 201 . The induction circuit control circuit 202 controls the working mode of the induction circuit 201 by outputting a control signal. As shown in Figure 3 is a schematic diagram of the control signal waveform generated by the induction circuit control circuit 202. The induction circuit 201 is in the first mode, that is, the working state when it receives the control signal in the first state in the figure, that is, the waveform 301 segment signal, and receives the waveform 302. The segment signal is in the second mode, that is, the standby state. The waveform 301 (high level) lasts for t1. The sensing circuit 201 receives the control signal of the second state in the figure, that is, the waveform 302 (low level) lasts for t2. . In the working state, the sensing circuit 201 has a first working current of 4mA and a first working time t1:40us; in a standby state, the sensing circuit 201 has a second working current of 13uA and a second working time t2:100ms. And so on. It can be seen that the first working time is much shorter than the second working time, so that the actual working state time of the sensing circuit 201 is extremely short compared to the sleep state, and its power consumption is greatly reduced. However, the switching frequency between the working state and the standby state of the induction circuit 201 is much greater than the frequency at which the linkage switch 101 of the vehicle charging plug is turned off or closed, so this time-sharing working state does not affect the sensing of the working state of the linkage switch 101 .
图4A为本发明的PWM脉冲信号波形图;Figure 4A is a PWM pulse signal waveform diagram of the present invention;
如图4A所示,控制引导电路205传输的PWM脉冲信号包括不同占空比的正相占空比信号402和负相占空比信号401,作为一个实施例,本发明的正相占空比信号402的占空比为13.5%,负相占空比信号401占空比为86.5%,可见PWM脉冲信号的波形是连续的,且正相占空比信号402和负相占空比信号401的占空比是互补的。分离电路将正相占空比信号402和负相占空比信号401通过第一整流电路和第二整流电路进行滤波整流后得到图4A和图4B的正相直流电压411和负相直流电压412。As shown in Figure 4A, the PWM pulse signal transmitted by the control guidance circuit 205 includes a positive phase duty cycle signal 402 and a negative phase duty cycle signal 401 with different duty ratios. As an embodiment, the positive phase duty cycle signal of the present invention The duty cycle of the signal 402 is 13.5%, and the duty cycle of the negative phase duty cycle signal 401 is 86.5%. It can be seen that the waveform of the PWM pulse signal is continuous, and the positive phase duty cycle signal 402 and the negative phase duty cycle signal 401 The duty cycles are complementary. The separation circuit filters and rectifies the positive phase duty cycle signal 402 and the negative phase duty cycle signal 401 through the first rectifier circuit and the second rectifier circuit to obtain the positive phase DC voltage 411 and the negative phase DC voltage 412 in Figure 4A and Figure 4B .
图4B和图4C分别为正相直流电压和负相直流电压的波形图;Figure 4B and Figure 4C are waveform diagrams of positive-phase DC voltage and negative-phase DC voltage respectively;
第一整流电路使用第一电阻512和第一二极管513(见图5)进行整流,使用第一电容517进行滤波,第一二极管513的正极连接控制引导电路205,摄取其正相占空比信号402信号进行滤波整流后得到如图4B所示的正相直流电压411;同理,第二整流电路使用第二电阻514和第二二极管516(见图5)进行整流,使用第二电容518进行滤波,第二二极管516的负极连接控制引导电路205,摄取其负相占空比信号401信号进行滤波整流后得到如图4C所示的负相直流电压412。正相直流电压411和负相直流电压412为连续的直流电压,作为一个具体电路中个实施例,其电压分别为9V和6V。The first rectifier circuit uses the first resistor 512 and the first diode 513 (see Figure 5) for rectification, and uses the first capacitor 517 for filtering. The anode of the first diode 513 is connected to the control guidance circuit 205 to capture its positive phase. After the duty cycle signal 402 is filtered and rectified, the positive-phase DC voltage 411 shown in Figure 4B is obtained; similarly, the second rectifier circuit uses the second resistor 514 and the second diode 516 (see Figure 5) for rectification. The second capacitor 518 is used for filtering, and the cathode of the second diode 516 is connected to the control steering circuit 205. The negative phase duty cycle signal 401 is taken in and filtered and rectified to obtain the negative phase DC voltage 412 as shown in Figure 4C. The positive phase DC voltage 411 and the negative phase DC voltage 412 are continuous DC voltages. As a specific embodiment of the circuit, their voltages are 9V and 6V respectively.
图5为本发明电子感应开关电路的电器元件结构示意图。Figure 5 is a schematic structural diagram of the electrical components of the electronic induction switch circuit of the present invention.
如图5所示,电子感应开关电路200包括分离电路210、感应电路201、感应电路控制电路202和开关电路230。As shown in FIG. 5 , the electronic induction switch circuit 200 includes a separation circuit 210 , an induction circuit 201 , an induction circuit control circuit 202 and a switch circuit 230 .
其中分离电路210包括第一整流电路和第二整流电路,具体的:第一整流电路包括第一电阻512、第一二极管513和第一电容517;第一电阻512的第一端501接收PWM脉冲信号,第一电阻512的第二端502连接第一二极管513的正极503;第一二极管513的负极504连接第一电容517的第一端581并形成第一公共连接点571;第一电容517的第二端582接地;第一公共连接点571为正相直流电压411的输出端。The separation circuit 210 includes a first rectifier circuit and a second rectifier circuit. Specifically: the first rectifier circuit includes a first resistor 512, a first diode 513 and a first capacitor 517; the first end 501 of the first resistor 512 receives PWM pulse signal, the second end 502 of the first resistor 512 is connected to the anode 503 of the first diode 513; the cathode 504 of the first diode 513 is connected to the first end 581 of the first capacitor 517 and forms a first common connection point 571; the second end 582 of the first capacitor 517 is grounded; the first common connection point 571 is the output end of the positive-phase DC voltage 411.
第二整流电路包括第二电阻514、第二二极管516、第二电容518和第三二极管519;第二电阻514的第一端505接收PWM脉冲信号,第二电阻514的第二端506连接第二二极管516的负极507;第二二极管516的正极508连接第二电容518的第一端583;第二电容518的第二端584连接第三二极管519的正极585,第三二极管519的负极586为负相直流电压412的输出端。The second rectifier circuit includes a second resistor 514, a second diode 516, a second capacitor 518 and a third diode 519; the first end 505 of the second resistor 514 receives the PWM pulse signal, and the second end of the second resistor 514 receives the PWM pulse signal. The terminal 506 is connected to the cathode 507 of the second diode 516; the anode 508 of the second diode 516 is connected to the first terminal 583 of the second capacitor 518; the second terminal 584 of the second capacitor 518 is connected to the third diode 519. The positive electrode 585 and the negative electrode 586 of the third diode 519 are the output terminals of the negative phase DC voltage 412 .
作为一个实施例,感应电路201为霍尔感应单元201,霍尔感应单元201输入端525连接第三二极管519的负极586输出的负相直流电压412;感应电路控制电路202也连接第三二极管519的负极586输出的负相直流电压412,感应电路控制电路202的输出连接霍尔感应单元201,发出如图3所示的控制信号控制霍尔感应单元201的工作,霍尔感应单元201在工作状态时感测图1和图2中磁体50的运动,产生位置感应信号。作为一个实施例,霍尔感应单元201和感应电路控制电路202可以设置在同一个电器芯片220中,感应电路控制电路202也可以通过另设的电路或元件来实现对霍尔感应单元201的连接和控制。电器芯片220的输出端524即是霍尔感应单元201的输出端,为位置感应信号的输出端。As an embodiment, the sensing circuit 201 is a Hall sensing unit 201. The input terminal 525 of the Hall sensing unit 201 is connected to the negative phase DC voltage 412 output by the cathode 586 of the third diode 519; the sensing circuit control circuit 202 is also connected to the third The negative phase DC voltage 412 output by the cathode 586 of the diode 519, the output of the induction circuit control circuit 202 is connected to the Hall induction unit 201, and a control signal as shown in Figure 3 is sent to control the operation of the Hall induction unit 201. The Hall induction In the working state, the unit 201 senses the movement of the magnet 50 in Figures 1 and 2 and generates a position sensing signal. As an embodiment, the Hall sensing unit 201 and the sensing circuit control circuit 202 can be provided in the same electrical chip 220. The sensing circuit control circuit 202 can also realize the connection to the Hall sensing unit 201 through another circuit or component. and control. The output terminal 524 of the electrical chip 220 is the output terminal of the Hall sensing unit 201 and is the output terminal of the position sensing signal.
开关电路230包括一场效应管531。场效应管531包括栅极541、源极543和漏极542;场效应管531的栅极541同时连接霍尔感应单元201的输出端524和第一整流电路的第一二极管513的负极,接收霍尔感应单元201的位置感应信号和第一整流电路输出的正相直流电压411,正相直流电压411为场效应管531的栅极触发高电平。场效应管531的源极543接地;场效应管531的漏极542接状态指示电路。场效应管531同时接收霍尔感应单元201的位置感应信号使其在导通时输出第一状态值,在截止时输出第二状态值。第一电阻值和第二电阻值通过状态指示电路来实现。The switching circuit 230 includes a field effect transistor 531 . The field effect transistor 531 includes a gate 541, a source 543 and a drain 542; the gate 541 of the field effect transistor 531 is simultaneously connected to the output terminal 524 of the Hall sensing unit 201 and the cathode of the first diode 513 of the first rectifier circuit. , receiving the position sensing signal of the Hall sensing unit 201 and the positive-phase DC voltage 411 output by the first rectifier circuit. The positive-phase DC voltage 411 is the gate triggering high level of the field effect transistor 531. The source 543 of the field effect transistor 531 is connected to the ground; the drain 542 of the field effect transistor 531 is connected to the status indication circuit. The field effect transistor 531 simultaneously receives the position sensing signal of the Hall sensing unit 201 so that it outputs a first state value when it is turned on and a second state value when it is turned off. The first resistance value and the second resistance value are realized by the status indication circuit.
状态指示电路包括第四电阻534和第五电阻535;第四电阻534和第五电阻535串联连接,第四电阻534的第一端551与第五电阻535的第一端552相连,以形成两者之间的第二公共连接点588;第四电阻534的第二端554为状态指示电路的输出端537,第五电阻535的第二端553接地;场效应管531的漏极542与第四电阻534和第五电阻535之间的第二公共连接点588相连。当场效应管531同时接收到正相直流电压411和位置感应信号时,效应管531的源极543与漏极542之间被导通,第五电阻535被短接,输出端537输出第四电阻534的电阻值作为第一状态值,此时连接确认电路207判断联动开关101导通;当场效应管531未接收到位置感应信号时,源极543与漏极542之间被截止,第四电阻534和第五电阻535串联,输出端537输出第四电阻534和第五电阻535的电阻值之和作为第二状态值,此时连接确认电路207判断联动开关101断开。The status indication circuit includes a fourth resistor 534 and a fifth resistor 535; the fourth resistor 534 and the fifth resistor 535 are connected in series, and the first end 551 of the fourth resistor 534 is connected to the first end 552 of the fifth resistor 535 to form two The second common connection point 588 between them; the second end 554 of the fourth resistor 534 is the output end 537 of the status indication circuit, the second end 553 of the fifth resistor 535 is grounded; the drain 542 of the field effect transistor 531 and the third The second common connection point 588 between the fourth resistor 534 and the fifth resistor 535 is connected. When the field effect transistor 531 receives the positive-phase DC voltage 411 and the position sensing signal at the same time, the source 543 and the drain 542 of the effect transistor 531 are connected, the fifth resistor 535 is short-circuited, and the output terminal 537 outputs the fourth resistor. The resistance value of 534 is used as the first state value. At this time, the connection confirmation circuit 207 determines that the linkage switch 101 is turned on; when the field effect transistor 531 does not receive the position sensing signal, the source 543 and the drain 542 are cut off, and the fourth resistor 534 and the fifth resistor 535 are connected in series, and the output terminal 537 outputs the sum of the resistance values of the fourth resistor 534 and the fifth resistor 535 as the second state value. At this time, the connection confirmation circuit 207 determines that the linkage switch 101 is disconnected.
需要补充的是,电子感应开关电路200还包括第四二极管532和第五二极管533。第四二极管532的正极连接所述第一公共连接点571,第四二极管532的负极连接所述场效应管531的栅极541。第四二极管532半向导通正相直流电压411。第五二极管533的正极566接地,第五二极管533的负极565连接在第四二极管532的负极564和场效应管531的栅极541的公共连接点之间,作为稳压二极管保护场效应管531的栅极541。It should be added that the electronic induction switch circuit 200 also includes a fourth diode 532 and a fifth diode 533 . The anode of the fourth diode 532 is connected to the first common connection point 571 , and the cathode of the fourth diode 532 is connected to the gate 541 of the field effect transistor 531 . The fourth diode 532 conducts the positive-phase DC voltage 411 in the semi-directional direction. The anode 566 of the fifth diode 533 is connected to ground, and the cathode 565 of the fifth diode 533 is connected between the cathode 564 of the fourth diode 532 and the common connection point of the gate 541 of the field effect transistor 531 as a voltage regulator. The diode protects the gate 541 of the field effect transistor 531 .
电子感应开关电路200还包括第六二极管536,第六二极管536的负极565连接在第四电阻534的第二端554,第六二极管536的正极572接地。第六二极管536,用于防止来自于状态指示电路的输出端537的电压浪涌破坏场效应管531的漏极542。The electronic induction switch circuit 200 also includes a sixth diode 536. The cathode 565 of the sixth diode 536 is connected to the second end 554 of the fourth resistor 534, and the anode 572 of the sixth diode 536 is connected to ground. The sixth diode 536 is used to prevent the voltage surge from the output terminal 537 of the status indicating circuit from damaging the drain 542 of the field effect transistor 531 .
电子感应开关电路200还包括第三电阻522,第三电阻522连接在第一公共连接点571和第四二极管532的正极之间,作为限流电阻限制正相直流电压产生的电流。The electronic induction switch circuit 200 also includes a third resistor 522, which is connected between the first common connection point 571 and the anode of the fourth diode 532, and serves as a current limiting resistor to limit the current generated by the positive-phase DC voltage.
第四二极管532、五二极管533、第六二极管536以及第三电阻522等用于保护场效应管531等电器元件能够在复杂的电磁环境下正常工作,提高抗电磁干扰能力。The fourth diode 532, the fifth diode 533, the sixth diode 536 and the third resistor 522 are used to protect the field effect transistor 531 and other electrical components to work normally in a complex electromagnetic environment and improve the ability to resist electromagnetic interference.
本发明在采用分离电路210接收控制引导电路205提供的PWM脉冲信号、并将PWM脉冲信号的正相PWM脉冲402和负相PWM脉冲401整流滤波产生正相直流电压411和负相直流电压412,分别提供给开关电路230和感应电路201作为工作电压。为减少能耗,通过感应电路控制电路202控制感应电路201间歇性的处于工作状态,并在工作状态时检测联动开关101上的磁体50的运动产生位置感测信号发送给开关电路230,开关电路230接受位置感测信号来判断联动开关101的状态是断开或是闭合,电路结构巧妙,且不需要额外增加供电线路来给感应电路201和开关电路230供电的同时不影响控制引导电路205的正常工作。The present invention uses the separation circuit 210 to receive the PWM pulse signal provided by the control and guidance circuit 205, and rectifies and filters the positive phase PWM pulse 402 and the negative phase PWM pulse 401 of the PWM pulse signal to generate a positive phase DC voltage 411 and a negative phase DC voltage 412. are respectively provided to the switching circuit 230 and the sensing circuit 201 as operating voltages. In order to reduce energy consumption, the induction circuit control circuit 202 controls the induction circuit 201 to be in the working state intermittently, and detects the movement of the magnet 50 on the linkage switch 101 during the working state to generate a position sensing signal and send it to the switching circuit 230. The switching circuit 230 receives the position sensing signal to determine whether the state of the linkage switch 101 is open or closed. The circuit structure is ingenious and does not require additional power supply lines to supply power to the sensing circuit 201 and the switch circuit 230 without affecting the control and guidance circuit 205. normal work.
尽管参考附图中出示的具体实施方式将对本发明进行描述,但是应当理解,在不背离本发明教导的精神和范围和背景下,本发明的电子感应开关电路可以有许多变化形式。本领域技术普通技术人员还将意识到有不同的方式来改变本发明所公开的实施例中的参数,均落入本发明和权利要求的精神和范围内。Although the invention will be described with reference to specific embodiments illustrated in the drawings, it will be understood that many variations of the electronic inductive switch circuit of the invention are possible without departing from the spirit and scope and context of the teachings of the invention. One of ordinary skill in the art will also recognize that there are different ways to vary the parameters of the disclosed embodiments of the invention, all within the spirit and scope of the invention and claims.
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