CN111487559A - Power leakage detection system - Google Patents
Power leakage detection system Download PDFInfo
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- CN111487559A CN111487559A CN202010333408.6A CN202010333408A CN111487559A CN 111487559 A CN111487559 A CN 111487559A CN 202010333408 A CN202010333408 A CN 202010333408A CN 111487559 A CN111487559 A CN 111487559A
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- triode
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Abstract
The invention discloses a power supply leakage detection system which comprises a power acquisition module and a feedback comparison module, wherein the power acquisition module acquires a power output power signal in a power supply system by using a power sampler J1 with the model of YK-3D3, the feedback comparison module uses an inductor L and a capacitor C4-capacitor C6 to form a frequency modulation circuit to stabilize the signal frequency, simultaneously uses a triode Q1, a triode Q2 and a variable resistor RW1 to form a voltage division detection circuit to divide the signal into two paths of signals, one path of signal is input into an in-phase input end of an operational amplifier AR3 after being buffered by an operational amplifier AR2, the other path of signal is input into an anti-phase input end of an operational amplifier AR3 by using a triode Q4 to detect an abnormal signal, and uses a triode Q3 to feed back the abnormal signal in the output signal of the circuit, and finally, the operational amplifier AR 38 compares the signal and then forms an RC filter circuit through a resistor R11, a resistor R12 and a capacitor C9, and transmits the signal to a power supply leakage detection system terminal through a signal transmitter.
Description
Technical Field
The invention relates to the technical field of power supply loops, in particular to a power supply leakage detection system.
Background
At present, a leakage circuit breaker in a power supply system includes a transformer for detecting leakage current, after the transformer detects the leakage current, a secondary winding of the transformer outputs a driving current to a rear stage thyristor, if the driving current enables the thyristor to be conducted, the thyristor drives a rear stage diode rectifier to be conducted, the diode rectifier rectifies a path of alternating current into a direct current power supply to drive a release to work, the release enables a power supply to be disconnected in an air-break mode to protect a power supply circuit, and the thyristor can be reliably conducted only by a large driving current peak, so that the leakage current cannot be protected under the condition of relatively small leakage current, and the use scene is relatively limited. For example, if the thyristor driving current needs at least 100mA and the transformer transformation ratio is N: 1, in this scenario, if the leakage current is less than N × 100mA, the gate current output from the secondary winding of the transformer to the thyristor will be less than 100mA, which may not enable the thyristor to be normally turned on, and thus cannot be protected.
Disclosure of Invention
In view of the above situation, an object of the present invention is to provide a power leakage detection system, which can adjust a power output signal in a power system and convert the power output signal into a trigger signal of the power leakage detection system.
The technical scheme includes that the power leakage detection system comprises a power acquisition module and a feedback comparison module, wherein the power acquisition module acquires power output power signals in a power system by using a power sampler J1 with the model of YK-3D3, the feedback comparison module uses an inductor L and a capacitor C4-capacitor C6 to form a frequency modulation circuit to stabilize signal frequency, simultaneously uses a triode Q1, a triode Q2 and a variable resistor RW1 to form a voltage division detection circuit to divide the signals into two paths of signals, one path of signals is input into an in-phase input end of an operational amplifier AR3 after being buffered by an operational amplifier AR2, the other path of signals is input into an anti-phase input end of an operational amplifier AR3 by using a triode Q4 to detect abnormal signals, the abnormal signals in the output signals of the frequency modulation circuit are fed back by using a triode Q3 to adjust the value of the abnormal signals detected by the triode Q4, and finally the operational amplifier AR3 compares the signals and then forms an RC filter circuit through a resistor R11, a resistor R12 and a capacitor C9, and sends the RC;
the feedback comparison module comprises a triode Q, a collector of the triode Q is connected with an inductor 1, a capacitor C and one end of a resistor R, a base of the triode Q is connected with the capacitor C, one end of the resistor R and one end of a variable resistor RW, the other end of the inductor 1 is connected with the other end of the capacitor C, the other end of the capacitor C is connected with the resistor R, the other end of the capacitor C is connected with a collector of the triode Q and a base of the triode Q, an emitter of the triode Q is connected with +5V of a power supply, an emitter of the triode Q is connected with the other end of the variable resistor RW, an anode of a diode D, an emitter of the triode Q and the capacitor C, one end of the resistor R, one end of an inductor 2 and a cathode of a diode D, the other end of the resistor R is grounded, a sliding end of the variable resistor RW is connected with the other end of the capacitor C, a base of the triode Q is connected with a collector of the triode Q, one end of the capacitor C and an in-phase input end of the operational amplifier AR, the other end of the capacitor R is grounded, one end of the operational amplifier, one end of the reverse phase resistor R is connected with an output end of the operational amplifier, an output end of the amplifier, an emitter of the resistor R is connected with an output end of the amplifier, an emitter of the amplifier, an inverted phase resistor R and an emitter of the amplifier, an inverted phase resistor R is connected with an.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. a voltage division detection circuit is formed by a triode Q1, a triode Q2 and a variable resistor RW1, the signal is divided into two paths of signals, the voltage division effect is realized by a variable resistor RW1, meanwhile, the triode Q1 is high-level detection, when the signal contains an abnormal high-level signal, the triode Q1 is conducted, the triode Q3 detects an output signal of a frequency modulation circuit, the high-level conduction is realized, in order to further detect whether the high-level signal is an abnormal signal, one path of the signal fed back by the triode Q1 and the triode Q3 is limited by a diode D2 and a diode D4, a circuit is protected, then the signal is amplified in phase by an operational amplifier AR4, a potential is provided for a collector of the triode Q4, meanwhile, two paths of signals fed back by the triodes Q1 and 596Q 3 are filtered by an inductor L, a base potential is provided for the triode Q4, the cut-off voltage of the triode Q4 is used for further judging whether the signal is abnormal, the abnormal signal is screened;
2. the triode Q2 is used for amplifying a signal voltage compensation low level signal, the signal is buffered by an operational amplifier AR2 and then input into an operational amplifier AR3, the operational amplifier AR3 compares the signal, if no abnormal high level signal exists in the signal, the reverse phase input end potential of the operational amplifier AR3 is 0 at the moment, the amplitude of the signal of the output end of the operational amplifier AR3 is basically the same as that of the signal of the non-phase input end, otherwise, the abnormal signal fed back by the triode Q4 finely adjusts the output signal of the operational amplifier AR3, the accuracy of the trigger early warning signal of the power leakage detection system terminal is adjusted, finally, a resistor R11, a resistor R12 and a capacitor C6 are used for forming an RC filter circuit for filtering, the RC filter circuit is sent into the power leakage detection system terminal through a signal transmitter E1, and the.
Drawings
Fig. 1 is a schematic diagram of a power leakage detection system according to the present invention.
FIG. 2 is a schematic diagram of a feedback comparison module of a power leakage detection system according to the present invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
The power supply leakage detection system comprises a power acquisition module and a feedback comparison module, wherein the power acquisition module acquires a power supply output power signal in a power supply system by using a power sampler J1 with the model of YK-3D3, the feedback comparison module uses an inductor L and a capacitor C4-a capacitor C6 to form a frequency modulation circuit to stabilize the signal frequency, simultaneously uses a triode Q1, a triode Q2 and a variable resistor RW1 to form a voltage division detection circuit to divide the signal into two paths of signals, one path of signal is input into an in-phase input end of an operational amplifier AR3 after being buffered by an operational amplifier AR2, the other path of signal is input into an anti-phase input end of an operational amplifier AR3 by using a triode Q4 to detect an abnormal signal in an output signal of the operational amplifier, the value of the abnormal signal is detected by using a triode Q3, and the final operational amplifier AR3 compares the signal and then forms an RC filter circuit through a resistor R11, a resistor R12 and a capacitor C9 to filter and sends the filtered signal to a terminal of the frequency modulation;
the feedback comparison module utilizes an inductor 1 and a capacitor C-capacitor C to form a frequency modulation circuit to stabilize signal frequency, the inductor 1 filters signal high-frequency components, the capacitor C and the capacitor C filter signal low-frequency components to prevent high-low-frequency components in signals from influencing detection effect in a voltage division detection circuit, meanwhile, a voltage division detection circuit is formed by a triode Q, a triode Q and a variable resistor RW to divide signals into two paths of signals, voltage division is realized by the variable resistor RW, meanwhile, the triode Q is high-level detection, when the signals contain abnormal high-level signals, the triode Q is conducted, meanwhile, the triode Q detects frequency modulation circuit output signals, high-level conduction is also conducted, in order to further detect whether the high-level signals are abnormal signals, one path of signals fed back by the triode Q utilizes a diode D and a diode D to limit, a protection circuit is provided, then after the signals are amplified in phase by an operational amplifier AR, a potential is provided for a collector of the triode Q, the triode Q and the signals fed back by the triode Q and the AR2 filter to provide base potential for the triode Q, the triode Q is further used for judging whether the signals are abnormal signals, the abnormal high-level signals are fed back to the operational amplifier is fed back to the operational amplifier, the operational amplifier is filtered by a power supply terminal, the operational amplifier, the reverse phase of the operational amplifier, the reverse phase signal is fed back to improve the accuracy of the reverse phase of the operational amplifier, and the operational amplifier system, the reverse phase of the operational amplifier, and the operational amplifier, otherwise, the;
the feedback comparison module is specifically structured, a collector of the triode Q is connected with the inductor 1, the capacitor C and one end of the resistor R, a base of the triode Q is connected with the capacitor C, one end of the resistor R and one end of the variable resistor RW, the other end of the inductor 1 is connected with the other end of the capacitor C, the other end of the capacitor C is connected with the resistor R and the other end of the capacitor C, the other end of the resistor R is connected with a collector of the triode Q and a base of the triode Q, an emitter of the triode Q is connected with +5V of a power supply, an emitter of the triode Q is connected with the other end of the variable resistor RW, an anode of the diode D, an emitter of the triode Q and the capacitor C, the resistor R, one end of the inductor 2 and a cathode of the diode D, the other end of the resistor R is grounded, a sliding end of the variable resistor RW is connected with the other end of the capacitor C, a base of the triode Q is connected with a collector of the triode Q, one end of the capacitor C and an in-phase input end of the operational amplifier AR, the other end of the capacitor C is grounded, the anti-phase input end of the operational amplifier AR, one end of the operational amplifier R is connected with an output end of the amplifier, the reverse phase input end of the amplifier R, the amplifier, the emitter of the reverse phase input end of the resistor R is connected with an output end of the operational amplifier, the emitter of the amplifier, the emitter of the resistor R is connected with an output end of the emitter of the amplifier, the emitter of the amplifier.
In the second embodiment, on the basis of the first embodiment, the power acquisition module selects a power sampler J1 with a model number of YK-3D3 to acquire a power output power signal of a power supply in a power supply system, a noise reduction circuit composed of an operational amplifier AR1, a capacitor C1 and a capacitor C2 reduces signal noise, the capacitor C1 is a decoupling capacitor to reduce the noise ratio of a signal source, the capacitor C2 is a filter capacitor, the operational amplifier AR1 plays a power amplification effect, a power supply end of the power sampler J1 is connected to +5V, a ground end of the power sampler J1 is grounded, an output end of the power sampler J1 is connected to a negative electrode of a voltage regulator D1 and one end of a resistor R1 and a capacitor C1, the other end of the resistor R1 is connected to one end of a capacitor C2 and a non-inverting input end of the operational amplifier AR1, the other end of the capacitor C2 is grounded, an output end of the operational amplifier 1 is connected to the other end of the capacitor C1, one end of the resistor R3 is connected to a collector R3, the other end of the resistor R2 is connected to ground.
When the system is used, the system comprises a power acquisition module and a feedback comparison module, wherein the power acquisition module acquires a power output power signal in a power system by using a power sampler J with the model of YK-3D, the feedback comparison module uses an inductor 1 and a capacitor C-capacitor C to form a frequency modulation circuit to stabilize the signal frequency, the inductor 1 filters a high-frequency signal component, the capacitor C and the capacitor C filter a low-frequency signal component to prevent the high-frequency and low-frequency components in the signal from influencing the detection effect in a voltage division detection circuit, simultaneously, a voltage division detection circuit is formed by using a triode Q, a triode Q and a variable resistor RW to divide the signal into two paths of signals, the voltage division function is realized by using the variable resistor RW, meanwhile, the triode Q is high-level detection, when the signal contains an abnormal high-level signal, the triode Q is conducted, the frequency modulation circuit output signal is detected by using the triode Q, the high-level conduction is conducted, in order to further detect whether the abnormal high-level signal is an abnormal signal, the triode Q, the signal is conducted by using a diode D, a protection circuit, then the same-phase signal is screened out after the same-phase amplification signal is amplified, the Q, the signal is further detected by using an AR, the power leakage signal is fed back to the same as an AR, the normal-phase signal feedback signal, the power leakage detection circuit, the normal-phase signal amplifier, the reverse-phase signal amplifier R-phase signal amplifier, the normal-phase signal amplifier R-phase signal amplifier, the normal-phase signal amplifier is further used for detecting amplifier, the normal-phase signal amplifier, the normal level amplifier, the normal-phase amplifier, the normal level amplifier is further used for judging whether the normal level amplifier, the normal level amplifier is used for.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (2)
1. A power leakage detection system comprises a power acquisition module and a feedback comparison module, and is characterized in that the power acquisition module acquires a power output power signal in a power system by using a power sampler J1 with the model of YK-3D3, the feedback comparison module uses an inductor L and a capacitor C4-a capacitor C6 to form a frequency modulation circuit to stabilize the signal frequency, simultaneously uses a triode Q1, a triode Q2 and a variable resistor RW1 to form a voltage division detection circuit to divide the signal into two paths of signals, one path of signal is input into an in-phase input end of an operational amplifier AR3 after being buffered by an operational amplifier AR2, the other path of signal is input into an anti-phase input end of an operational amplifier AR3 by using a triode Q4 to detect an abnormal signal in the output signal of the operational amplifier, the value of the abnormal signal is detected by using a triode Q3, and the final operational amplifier AR3 compares the signal and then forms an RC filter circuit through a resistor R11, a resistor R12 and a capacitor C9 to filter and sends the filtered signal to a terminal of the frequency;
the feedback comparison module comprises a triode Q, a collector of the triode Q is connected with an inductor 1, a capacitor C and one end of a resistor R, a base of the triode Q is connected with the capacitor C, one end of the resistor R and one end of a variable resistor RW, the other end of the inductor 1 is connected with the other end of the capacitor C, the other end of the capacitor C is connected with the resistor R, the other end of the capacitor C is connected with a collector of the triode Q and a base of the triode Q, an emitter of the triode Q is connected with +5V of a power supply, an emitter of the triode Q is connected with the other end of the variable resistor RW, an anode of a diode D, an emitter of the triode Q and the capacitor C, one end of the resistor R, one end of an inductor 2 and a cathode of a diode D, the other end of the resistor R is grounded, a sliding end of the variable resistor RW is connected with the other end of the capacitor C, a base of the triode Q is connected with a collector of the triode Q, one end of the capacitor C and an in-phase input end of the operational amplifier AR, the other end of the capacitor R is grounded, one end of the operational amplifier, one end of the reverse phase resistor R is connected with an output end of the operational amplifier, an output end of the amplifier, an emitter of the resistor R is connected with an output end of the amplifier, an emitter of the amplifier, an inverted phase resistor R and an emitter of the amplifier, an inverted phase resistor R is connected with an.
2. The power leakage detection system of claim 1, wherein the power collection module comprises a power sampler J1 of type YK-3D3, a power supply terminal of the power sampler J1 is connected to +5V, a ground terminal of the power sampler J1 is connected to ground, an output terminal of the power sampler J1 is connected to a negative electrode of a voltage regulator tube D1 and one end of a resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is connected to one end of a capacitor C2 and a non-inverting input terminal of an operational amplifier AR1, the other end of the capacitor C2 is connected to ground, an output terminal of the operational amplifier AR1 is connected to the other end of a capacitor C1, one end of a resistor R3 and a collector of a triode Q3, an inverting input terminal of the operational amplifier AR1 is connected to the other end of a resistor R3 and one end of a resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010333408.6A CN111487559A (en) | 2020-04-24 | 2020-04-24 | Power leakage detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010333408.6A CN111487559A (en) | 2020-04-24 | 2020-04-24 | Power leakage detection system |
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| CN111487559A true CN111487559A (en) | 2020-08-04 |
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| CN202010333408.6A Withdrawn CN111487559A (en) | 2020-04-24 | 2020-04-24 | Power leakage detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952973A (en) * | 2020-08-31 | 2020-11-17 | 郑州工程技术学院 | Power supply circuit of transfer robot |
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2020
- 2020-04-24 CN CN202010333408.6A patent/CN111487559A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952973A (en) * | 2020-08-31 | 2020-11-17 | 郑州工程技术学院 | Power supply circuit of transfer robot |
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Application publication date: 20200804 |