CN209841948U - Adjustable Hall voltage sensor - Google Patents
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Abstract
Description
技术领域technical field
本实用新型涉及一种传感器,具体涉及一种可调式霍尔电压传感器。The utility model relates to a sensor, in particular to an adjustable Hall voltage sensor.
背景技术Background technique
目前国内外用于直流电压隔离的传感器有两大类,一类是基于光电效应的光电式传感器,这类传感器在环境温度不变的条件下,传感精度高、线性度好,但当环境温度变化时,光敏器件的暗电流和光电流将随温度的变化而变化,因此只能实现直流隔离,很难达到直流电压高精度的隔离传送和检测的目的。另一类是霍尔电压传感器,其具有传感精度高、线性度好,而且温度漂移小等特点,基于霍尔效应的磁平衡原理自身所具有的特性有:一是由于磁平衡原理,可使输出电流能精确地反映出原边电流值,输出电压能精确地反映出原边的电压值,因此采用该原理研制的传感器从理论上讲,可具有传感精度高、线性度好的特性,二是输出与输入之间高度隔离,非常有利于电隔离。At present, there are two types of sensors used for DC voltage isolation at home and abroad. One is the photoelectric sensor based on the photoelectric effect. This type of sensor has high sensing accuracy and good linearity under the condition of constant ambient temperature, but when the ambient temperature When changing, the dark current and photocurrent of the photosensitive device will change with the change of temperature, so only DC isolation can be achieved, and it is difficult to achieve the purpose of high-precision isolation transmission and detection of DC voltage. The other type is the Hall voltage sensor, which has the characteristics of high sensing accuracy, good linearity, and small temperature drift. The characteristics of the magnetic balance principle based on the Hall effect are: First, due to the magnetic balance principle, it can be The output current can accurately reflect the current value of the primary side, and the output voltage can accurately reflect the voltage value of the primary side. Therefore, the sensor developed by this principle can theoretically have the characteristics of high sensing accuracy and good linearity. , The second is the high isolation between the output and the input, which is very conducive to electrical isolation.
在应用计算机进行4遥(遥控、遥调、遥信、遥测)监控的现代化系统中,监控系统中的工控机与受控设备之间需要进行电隔离检测以保证工控机能安全和可靠地运行。其中直流电压隔离检测通常是由霍尔电压传感器实现的。霍尔电压传感器不仅传感精度高、线性度好,而且温度漂移小,在-40℃~75℃的温度范围内其传感精度和线性度变化非常小。因此在隔离检测、隔离监控技术中得到了广泛的应用。但是工控机的检测系统中由于被检测的电压多,而且电压值不同,甚至相差很大,工控机对输入电压范围的要求是一定的,在这种情况下,如果传感器的输出电压与输入电压的比例(传送比例)是固定的,那么在有些情况(电压过高或过低)下传感器的输出电压就无法满足工控机对输入电压的要求。为了满足工控机对输入电压的要求,只好对传感器的输出电压进行再处理,这种处理往往会降低精度。In a modern system that uses computers for 4-remote monitoring (remote control, remote adjustment, remote signaling, and telemetry), an electrical isolation test is required between the industrial computer and the controlled equipment in the monitoring system to ensure the safe and reliable operation of the industrial computer. Among them, the DC voltage isolation detection is usually realized by the Hall voltage sensor. The Hall voltage sensor not only has high sensing accuracy and good linearity, but also has small temperature drift, and its sensing accuracy and linearity change very little in the temperature range of -40°C to 75°C. Therefore, it has been widely used in isolation detection and isolation monitoring technology. However, in the detection system of the industrial computer, since there are many voltages to be detected, and the voltage values are different, even greatly different, the requirements for the input voltage range of the industrial computer are certain. In this case, if the output voltage of the sensor is the same as the input voltage The ratio (transmission ratio) of the sensor is fixed, so in some cases (the voltage is too high or too low), the output voltage of the sensor cannot meet the requirements of the industrial computer for the input voltage. In order to meet the requirements of the industrial computer for the input voltage, the output voltage of the sensor has to be reprocessed, which often reduces the accuracy.
发明内容Contents of the invention
本发明的目的在于解决现有技术中霍尔电压传感器检测电压的传送比例是固定的,当检测系统需检测的电压多且电压值不同时,需要对传感器的输出电压进行再处理,这种处理往往会降低测试精度,为此本实用新型提供了一种可调式霍尔电压传感器,该可调式霍尔电压传感器具有传感精度高、传送比例连续可调的特点。The purpose of the present invention is to solve the problem that the transmission ratio of the detection voltage of the Hall voltage sensor in the prior art is fixed. When the detection system needs to detect many voltages and the voltage values are different, the output voltage of the sensor needs to be reprocessed. This processing The test accuracy is often reduced, so the utility model provides an adjustable Hall voltage sensor, which has the characteristics of high sensing accuracy and continuously adjustable transmission ratio.
本实用新型提供技术方案如下:The utility model provides technical scheme as follows:
可调式霍尔电压传感器,包括:Adjustable Hall voltage sensors, including:
直流电压输入电路,用于将被传电压转换为原边电流,所述原边电流通过所述原边线圈形成原边磁场;A DC voltage input circuit, used to convert the transmitted voltage into a primary current, and the primary current passes through the primary coil to form a primary magnetic field;
霍尔元件N3,所述霍尔元件N3包括原边线圈和副边线圈;Hall element N 3 , the Hall element N 3 includes a primary coil and a secondary coil;
工作电流电路,用于提供工作电流;An operating current circuit for providing an operating current;
副边电流形成电路,用于将霍尔电压放大并转换为副边电流,所述副边电流通过所述副边线圈形成副边磁场;The secondary current forming circuit is used to amplify and convert the Hall voltage into a secondary current, and the secondary current passes through the secondary coil to form a secondary magnetic field;
可调比例电路,用于调整传送比例,使输出电压可调。The adjustable ratio circuit is used to adjust the transmission ratio so that the output voltage can be adjusted.
进一步地,所述可调比例电路,至少包括一个可调电阻R01。Further, the adjustable ratio circuit includes at least one adjustable resistor R 01 .
进一步地,所述可调比例电路包括电阻R02和可调电阻R01,电阻R02的一端连接副边电压输出端,电阻R02的另外一端接地,可调电阻R01串联在电压输出端和电阻R02之间。Further, the adjustable ratio circuit includes a resistor R 02 and an adjustable resistor R 01 , one end of the resistor R 02 is connected to the secondary voltage output end, the other end of the resistor R 02 is grounded, and the adjustable resistor R 01 is connected in series to the voltage output end and resistor R 02 .
进一步地,所述工作电流电路包括电阻R4、正电源、电阻R5、负电源,霍尔元件N3的1脚经所述电阻R4连接所述正电源,霍尔元件N3的3脚经电阻R5连接负电源。Further, the working current circuit includes a resistor R 4 , a positive power supply, a resistor R 5 , and a negative power supply. Pin 1 of the Hall element N 3 is connected to the positive power supply through the resistor R 4 , and 3 pins of the Hall element N 3 The pin is connected to the negative power supply through the resistor R5.
进一步地,所述工作电流电路还包括滤波电容C3,所述滤波电容C3的正极连接正电源,该滤波电容C3的负极连接负电源。Further, the working current circuit further includes a filter capacitor C 3 , the positive pole of the filter capacitor C 3 is connected to the positive power supply, and the negative pole of the filter capacitor C 3 is connected to the negative power supply.
进一步地,所述可调式霍尔电压传感器还包括消除失调电路,用于消除附加电压。Further, the adjustable Hall voltage sensor also includes an offset elimination circuit for eliminating the additional voltage.
进一步地,所述消除失调电路包括运算放大器N1、电阻R1、电阻R2,所述运算放大器N1的b-cp1端经电容C1连接运算放大器N1的cp2端,所述运算放大器N1的iput2端经电阻R1连接霍尔元件N3的2脚,所述运算放大器N1的iput1端经电阻R2连接霍尔元件N3的4脚,所述运算放大器N1的vout端将处理后的信号输出给副边电流形成电路。Further, the offset elimination circuit includes an operational amplifier N 1 , a resistor R 1 , and a resistor R 2 , the b-cp1 end of the operational amplifier N 1 is connected to the cp2 end of the operational amplifier N 1 via a capacitor C 1 , and the operational amplifier N 1 The iput2 end of N1 is connected to pin 2 of the Hall element N3 via a resistor R1, the iput1 end of the operational amplifier N1 is connected to pin 4 of the Hall element N3 via a resistor R2, and the vout of the operational amplifier N1 The terminal outputs the processed signal to the secondary current forming circuit.
进一步地,所述副边电流形成电路包括第一三极管Q1和第二三极管Q2,所述第一三极管Q1的集电极连接消除失调电路的输出端,所述第一三极管Q1的基极连接正电源,所述第一三极管Q1的发射极连接第二三极管Q2的集电极,第二三极管Q2的发射极连接消除失调电路的输出端,第二三极管Q2的基极连接负电源,所述第二三极管Q2的集电极连接信号输出端。Further, the secondary current forming circuit includes a first transistor Q 1 and a second transistor Q 2 , the collector of the first transistor Q 1 is connected to the output terminal of the offset elimination circuit, and the first transistor Q 1 The base of a transistor Q1 is connected to the positive power supply, the emitter of the first transistor Q1 is connected to the collector of the second transistor Q2 , and the emitter of the second transistor Q2 is connected to eliminate the offset At the output end of the circuit, the base of the second triode Q2 is connected to the negative power supply, and the collector of the second triode Q2 is connected to the signal output end.
进一步地,所述副边电流形成电路还包括第一开关二极管D1和第二开关二极管D2,第一开关二极管D1的阳极连接第二三极管Q2的基极,第一开关二极管D1的阴极连接第二三极管Q2的集电极,第二开关二极管D2的阳极连接第二三极管Q2的集电极,第二开关二极管D2的阴极连接第一三极管Q1的基极,所述第一开关二极管D1和第二开关二极管D2采用的型号为BAV99。Further, the secondary current forming circuit further includes a first switching diode D 1 and a second switching diode D 2 , the anode of the first switching diode D 1 is connected to the base of the second triode Q 2 , the first switching diode The cathode of D1 is connected to the collector of the second transistor Q2 , the anode of the second switching diode D2 is connected to the collector of the second transistor Q2 , and the cathode of the second switching diode D2 is connected to the first transistor The base of Q 1 , the first switching diode D 1 and the second switching diode D 2 are BAV99.
与现有技术相比,本发明的有益效果是:Compared with prior art, the beneficial effect of the present invention is:
1.本实用新型公开的可调式霍尔电压传感器采用可调比例电路,解决了现有技术输出电压不可调的问题,能够实现传送比例连续可调,将不同电压范围的输入电压调整为可供工控机检测的电压。1. The adjustable Hall voltage sensor disclosed in the utility model adopts an adjustable ratio circuit, which solves the problem that the output voltage cannot be adjusted in the prior art, and can realize continuous adjustment of the transmission ratio, and adjust the input voltage of different voltage ranges to be available. The voltage detected by the industrial computer.
2.本实用新型方案通过采用可调比例电路,解决了现有技术中检测系统需对传感器的输出电压进行再处理的问题,能够实现提高测试精度的效果;2. The utility model solves the problem that the detection system needs to reprocess the output voltage of the sensor in the prior art by adopting an adjustable ratio circuit, and can realize the effect of improving the test accuracy;
3.本实用新型采用消除失调电路,消除霍尔元件N3因不等位效应以及包括加工在内的其他诸多原因给霍尔电压带来的附加电压,提高了测试的精确度。 3. The utility model adopts the offset elimination circuit to eliminate the additional voltage brought by the Hall element N3 to the Hall voltage due to the unequal potential effect and many other reasons including processing, thereby improving the accuracy of the test.
4.本实用新型由于输出与输入之间高度隔离,所以非常有利于电隔离,从而减小测量误差。4. Due to the high isolation between the output and the input of the utility model, it is very beneficial to the electrical isolation, thereby reducing the measurement error.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本实用新型的一些实施例,对于本领域的普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.
图1为现有技术中的霍尔效应磁平衡原理图;Fig. 1 is the schematic diagram of Hall effect magnetic balance in the prior art;
图2为本实用新型实施例提供的可调式霍尔电压传感器的原理框图;Fig. 2 is the functional block diagram of the adjustable Hall voltage sensor provided by the embodiment of the utility model;
图3为本实用新型实施例提供的可调比例电路的电路连接示意图;Fig. 3 is the schematic diagram of the circuit connection of the adjustable proportional circuit provided by the embodiment of the present invention;
图4为本实用新型实施例提供的可调式霍尔电压传感器的副边电路图。Fig. 4 is a secondary side circuit diagram of the adjustable Hall voltage sensor provided by the embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
下面结合附图描述本实用新型实施例的可调式霍尔电压传感器。The adjustable Hall voltage sensor of the embodiment of the utility model is described below with reference to the accompanying drawings.
图1为现有技术中的霍尔效应磁平衡原理图,被传电压U1通过等效电阻R的原边电流值IP在原边产生的磁通量与副边电流IO(由霍尔电压经放大而形成)通过副边线圈所产生的磁通量平衡时,副边电流值IO将精确地反映出原边电流值IP,副边电流IO在R0上的电压降UO将精确地反映出原边电压值U1,这就是基于霍尔效应的磁平衡原理,该原理又简称为磁平衡原理或霍尔效应闭环原理。Fig. 1 is the principle diagram of Hall effect magnetic balance in the prior art, the magnetic flux and the secondary current I O generated by the transmitted voltage U1 through the primary current value IP of the equivalent resistance R on the primary side (by the Hall voltage via the Hall voltage) When the magnetic flux generated by the secondary coil is balanced, the secondary current value I O will accurately reflect the primary current value I P , and the voltage drop U O of the secondary current I O on R 0 will be accurately Reflecting the primary side voltage value U 1 , this is the magnetic balance principle based on the Hall effect, which is also referred to as the magnetic balance principle or the Hall effect closed-loop principle.
图2为本实用新型实施例提供的可调式霍尔电压传感器的原理框图,采用基于霍尔效应的磁平衡原理和可调比例电路研制的可调式电压传感器包括:Fig. 2 is the functional block diagram of the adjustable Hall voltage sensor provided by the embodiment of the present invention. The adjustable voltage sensor developed by using the magnetic balance principle based on the Hall effect and the adjustable proportional circuit includes:
直流电压输入电路,该直流电压输入电路连接原边线圈,将被传电压转换为原边电流IP,该电流通过原边线圈形成原边磁场。A DC voltage input circuit, which is connected to the primary coil, converts the transmitted voltage into a primary current I P , and the current passes through the primary coil to form a primary magnetic field.
可调比例电路,该可调比例电路连接副边电压输出端,使输出电压UO连续可调,以满足多种测试要求,具体地,参见图3,图3为本实用新型实施例提供的可调比例的电路连接示意图,可调比例电路包括电阻R02和可调电阻R01,电阻R02的一端连接副边电压输出端,电阻R02的另外一端接地,可调电阻R01串联在电压输出端和电阻R02之间,这样当原边磁通量与副边磁通量平衡时,副边电流值IO将精确地反映原边电流值IP,副边电压值UO将精确地反映出原边电压值U1。因此,通过调整可调电阻R01的阻值可达到调整传送比例的目的。Adjustable ratio circuit, the adjustable ratio circuit is connected to the secondary side voltage output terminal, so that the output voltage U O can be continuously adjusted to meet various test requirements. Specifically, refer to Fig. 3, which is provided by the embodiment of the present invention Schematic diagram of the circuit connection of the adjustable ratio. The adjustable ratio circuit includes a resistor R 02 and an adjustable resistor R 01. One end of the resistor R 02 is connected to the secondary voltage output terminal, and the other end of the resistor R 02 is grounded. The adjustable resistor R 01 is connected in series Between the voltage output terminal and the resistor R 02 , so that when the primary side magnetic flux and the secondary side magnetic flux balance, the secondary side current value I O will accurately reflect the primary side current value I P , and the secondary side voltage value U O will accurately reflect Primary side voltage value U 1 . Therefore, the purpose of adjusting the transmission ratio can be achieved by adjusting the resistance value of the adjustable resistor R 01 .
副边电流形成电路,该副边电流形成电路连接副边线圈,将霍尔电压放大并转换为副边电流IO,该电流通过副边线圈形成副边磁场。The secondary current forming circuit is connected to the secondary coil to amplify and convert the Hall voltage into a secondary current I O , and the current passes through the secondary coil to form a secondary magnetic field.
工作电流电路,该工作电流电路连接副边电流形成电路,该电路可为霍尔元件N3、副边电流形成电路和消除失调电路提供工作电流。A working current circuit, the working current circuit is connected to the secondary current forming circuit, and the circuit can provide working current for the Hall element N 3 , the secondary current forming circuit and the offset elimination circuit.
消除失调电路,该消除失调电路连接副边电流形成电路,可消除霍尔元件N3因不等位效应以及包括加工在内的原因给霍尔电压带来的附加电压。The offset elimination circuit, which is connected to the secondary current forming circuit, can eliminate the additional voltage brought by the Hall element N3 to the Hall voltage due to the unequal potential effect and reasons including processing.
如图4,作为本实用新型的工作电流电路的具体实施例,该工作电流电路包括电阻R4、正电源、电阻R5、负电源,该工作电流电路为霍尔元件N3提供工作电路,该电路的具体连接方式如下:As shown in Figure 4, as a specific embodiment of the working current circuit of the present invention, the working current circuit includes a resistor R 4 , a positive power supply, a resistor R 5 , and a negative power supply. The working current circuit provides a working circuit for the Hall element N 3 , The specific connection method of the circuit is as follows:
霍尔元件N3的1脚(VCC+)经电阻R4连接正电源,该正电源为该电路提供+15V的直流电压,霍尔元件N3的3脚(VCC-)经电阻R5连接负电源,该负电源为该电路提供-15V的直流电压。Pin 1 (VCC+) of Hall element N 3 is connected to the positive power supply through resistor R 4 , the positive power supply provides +15V DC voltage for the circuit, pin 3 (VCC-) of Hall element N 3 is connected to negative power supply through resistor R 5 power supply, the negative supply provides a DC voltage of -15V for this circuit.
为消除直流电源中不需要的交流成分,该工作电流电路还包括滤波电容C3,该滤波电容C3的正极连接正电源,该滤波电容C3的负极连接负电源。In order to eliminate unnecessary AC components in the DC power supply, the working current circuit further includes a filter capacitor C 3 , the positive pole of the filter capacitor C 3 is connected to the positive power supply, and the negative pole of the filter capacitor C 3 is connected to the negative power supply.
如图4,作为本实用新型的消除失调电路的具体实施例,该消除失调电路包括通用运算放大器N1、电阻R1、电阻R2,该消除失调电路可消除霍尔元件N3因不等位效应以及包括加工在内的原因给霍尔电压带来的附加电压,该电路的具体连接方式如下:As shown in Figure 4, as a specific embodiment of the offset elimination circuit of the present invention, the offset elimination circuit includes a general-purpose operational amplifier N 1 , a resistor R 1 , and a resistor R 2 . The additional voltage brought by the bit effect and the reason including processing to the Hall voltage, the specific connection method of the circuit is as follows:
通用运算放大器N1的Vcc+端连接正电源,该通用运算放大器N1采用的型号为LM201,该正电源为该电路提供+15V的直流电压,通用运算放大器N1的Vcc-端连接负电源,该负电源为该电路提供-15V的直流电压,运算放大器N1的b-cp1端经电容C1连接运算放大器N1的cp2端,运算放大器N1的iput2端经电阻R1连接霍尔元件N3的2脚,运算放大器N1的iput1端经电阻R2连接霍尔元件N3的4脚,运算放大器N1的vout端将处理后的信号输出给副边电流形成电路。 The Vcc+ terminal of the general operational amplifier N1 is connected to the positive power supply. The model of the general operational amplifier N1 is LM201. The positive power supply provides +15V DC voltage for the circuit. The Vcc- terminal of the general operational amplifier N1 is connected to the negative power supply. The negative power supply provides a DC voltage of -15V for the circuit, the b - cp1 terminal of the operational amplifier N1 is connected to the cp2 terminal of the operational amplifier N1 through the capacitor C1 , and the iput2 terminal of the operational amplifier N1 is connected to the Hall element through the resistor R1 Pin 2 of N 3 , the iput1 terminal of operational amplifier N 1 is connected to pin 4 of Hall element N 3 through resistor R 2 , and the vout terminal of operational amplifier N 1 outputs the processed signal to the secondary current forming circuit.
为方便调节零点,该消除失调电路还包括电阻R7、电阻R6、电阻R8,这些电阻组成偏置电流电路,具体连接方式如下:For the convenience of adjusting the zero point, the offset elimination circuit also includes resistors R 7 , R 6 , and R 8 . These resistors form a bias current circuit. The specific connection methods are as follows:
霍尔元件N3的1脚连接电阻R7的一端、电阻R7的另一端连接电阻R6的一端,电阻R6的另一端连接霍尔元件N3的3脚,电阻R7和电阻R6相连的一端经电阻R8连接通用运算放大器N1的iput2端。Pin 1 of Hall element N3 is connected to one end of resistor R7 , the other end of resistor R7 is connected to one end of resistor R6 , and the other end of resistor R6 is connected to pin 3 of Hall element N3, resistor R7 and resistor R One end connected to 6 is connected to the iput2 end of the general-purpose operational amplifier N 1 through the resistor R 8 .
如图4,作为本实用新型的的副边电流形成电路具体实施例,该副边电流形成电路包括第一三极管Q1、第二三极管Q2、电阻R3和电容C2,第一三极管Q1采用的型号为3904,第二三极管Q2采用的型号为3906,第一三极管Q1的集电极连接通用运算放大器N1的vout端,第一三极管Q1的基极连接正电源,第二三极管Q2的发射极连接运算放大器N1的vout端,第二三极管Q2的基极连接负电源,第一三极管Q1的发射极连接第二三极管Q2的集电极,第二三极管Q2的集电极连接vout端,电阻R3的一端经电阻R1连接霍尔元件N3的2脚,电阻R3的另一端经电容C2连接vout端。该副边电流形成电路通过运算放大器N1连接副边线圈,将霍尔电压放大并转换为副边电流IO,该电流通过副边线圈形成副边磁场。As shown in Figure 4, as a specific embodiment of the secondary current forming circuit of the present invention, the secondary current forming circuit includes a first triode Q 1 , a second triode Q 2 , a resistor R 3 and a capacitor C 2 , The model used by the first triode Q1 is 3904, the model used by the second triode Q2 is 3906, the collector of the first triode Q1 is connected to the vout terminal of the general-purpose operational amplifier N1, and the first triode The base of the transistor Q1 is connected to the positive power supply, the emitter of the second transistor Q2 is connected to the vout terminal of the operational amplifier N1, the base of the second transistor Q2 is connected to the negative power supply, and the first transistor Q1 The emitter of the transistor Q2 is connected to the collector of the second transistor Q2 , the collector of the second transistor Q2 is connected to the vout terminal, one end of the resistor R3 is connected to the pin 2 of the Hall element N3 through the resistor R1, and the resistor R The other end of 3 is connected to the vout end via capacitor C 2 . The secondary current forming circuit is connected to the secondary coil through an operational amplifier N 1 , amplifies the Hall voltage and converts it into a secondary current I O , and the current passes through the secondary coil to form a secondary magnetic field.
为使副边电流形成电路更稳定的工作,该电路还包括第一开关二极管D1和第二开关二极管D2,开关二极管采用的型号为BAV99,第一开关二极管D1的阳极连接第二三极管Q2的基极,该第一开关二极管D1的阴极连接第二三极管Q2的集电极,第二开关二极管D2的阳极连接第二三极管Q2的集电极,第二开关二极管D2的阴极连接第一三极管Q1的基极。In order to make the secondary current forming circuit work more stably, the circuit also includes a first switching diode D 1 and a second switching diode D 2 , the type of the switching diode is BAV99, and the anode of the first switching diode D 1 is connected to the second and third The base of the transistor Q2 , the cathode of the first switching diode D1 is connected to the collector of the second transistor Q2 , the anode of the second switching diode D2 is connected to the collector of the second transistor Q2 , the second The cathode of the second switching diode D2 is connected to the base of the first triode Q1.
以上仅为本申请的实施例而已,并不用于限制本申请。对于本领域技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等,均应包含在本申请的权利要求范围之内。The above are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.
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CN112630501A (en) * | 2020-12-22 | 2021-04-09 | 成都新欣神风电子科技有限公司 | DC current sensor circuit with arbitrary bias current output |
CN112858754A (en) * | 2021-01-07 | 2021-05-28 | 四川众航电子科技有限公司 | Voltage type Hall sensor device |
CN117519397A (en) * | 2024-01-05 | 2024-02-06 | 成都新欣神风电子科技有限公司 | Zero bias adjustable circuit based on magnetic balance current sensor |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112630501A (en) * | 2020-12-22 | 2021-04-09 | 成都新欣神风电子科技有限公司 | DC current sensor circuit with arbitrary bias current output |
CN112858754A (en) * | 2021-01-07 | 2021-05-28 | 四川众航电子科技有限公司 | Voltage type Hall sensor device |
CN117519397A (en) * | 2024-01-05 | 2024-02-06 | 成都新欣神风电子科技有限公司 | Zero bias adjustable circuit based on magnetic balance current sensor |
CN117519397B (en) * | 2024-01-05 | 2024-04-12 | 成都新欣神风电子科技有限公司 | Zero bias adjustable circuit based on magnetic balance current sensor |
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