CN106875794B - Teaching power consumption fast pulse burst immunity experimental device - Google Patents
Teaching power consumption fast pulse burst immunity experimental device Download PDFInfo
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- CN106875794B CN106875794B CN201710198312.1A CN201710198312A CN106875794B CN 106875794 B CN106875794 B CN 106875794B CN 201710198312 A CN201710198312 A CN 201710198312A CN 106875794 B CN106875794 B CN 106875794B
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Abstract
The invention discloses a teaching power utilization fast group pulse immunity experimental device which comprises an alternating current rectifying circuit, an indicating device and a transistor with a metal radiator, wherein the input end of the alternating current rectifying circuit is connected with an alternating current input, the positive output end of the alternating current rectifying circuit is connected to the transistor through the indicating device and then connected back to the negative output end of the alternating current rectifying circuit through the transistor, and meanwhile, the metal radiator is connected to the ground. The invention is used for indicating the device and the loop through which the electric fast pulse group interferes the current in the teaching experiment process of the electric fast pulse group, and simultaneously can confirm whether the implemented anti-interference measure effectively enhances the EFT anti-interference capability of the experiment device or not through the brightness intensity or the sound volume of the indicating lamp in the indicating device so as to achieve the aim of the experiment teaching training of the electromagnetic compatibility technology.
Description
Technical Field
The invention relates to a device, in particular to a rapid pulse burst immunity experimental device for teaching power utilization.
Background
Since 1996, after the european union imposed the EMC electromagnetic compatibility regulation, electronic products on the market all need to comply with the electromagnetic compatibility regulation (EMC regulation) before they can be sold on the market. China also starts to enforce corresponding electromagnetic compatibility regulations in 2000, so that electronic products sold and exported in China at present need to meet the requirements of the electromagnetic compatibility regulations.
An electric fast burst pulse (abbreviated as "EFT") immunity test is one of the immunity regulations in the electromagnetic compatibility regulations, specifically the IEC61000-4-4, in order to verify the immunity of electrical and electronic devices to various types of transient disturbances, such as switching off inductive loads, relay contact bounce, etc., from switching transients.
When an enterprise goes to a third-party electromagnetic compatibility certification laboratory to perform electromagnetic compatibility test verification on products, particularly during an electric fast pulse group immunity test, a loop and related devices through which EFT interference current flows cannot be confirmed, and the effective degree of rectification measures cannot be confirmed. Therefore, engineers cannot perform theoretical analysis and specific quantitative analysis by combining the electromagnetic compatibility theory from the modification of actual products, and can only find a solution by adopting an infinite trial and error method, which leads to the stagnation of product development and even the failure of new product development in many cases.
In addition, in the electromagnetic compatibility training teaching, a teaching and training experimental device which can be used for EFT test is lacked, relevant devices and loops through which injected EFT interference current flows cannot be displayed in the experimental teaching process, and meanwhile, the effective degree of the rectification measure implemented in the teaching process on the improvement of the immunity cannot be judged, so that the existing electromagnetic compatibility training teaching stays at the level of pure theory teaching, and the more landing guidance and help cannot be provided for the rectification of actual products.
Disclosure of Invention
The invention aims to provide a rapid pulse burst immunity experimental device for teaching power utilization, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a teaching power consumption fast burst pulse noise immunity experimental apparatus, includes AC rectifier circuit, indicating device and takes the transistor of metal radiator, AC rectifier circuit's input termination exchanges input, and AC rectifier circuit's output positive terminal is connected to the transistor through indicating device, is connected back to AC rectifier circuit's output negative terminal by the transistor again, and the metal radiator is connected to ground simultaneously.
As a still further scheme of the invention: the indicating device comprises an indicating lamp and a sound alarm.
Compared with the prior art, the invention has the beneficial effects that: the invention is used for indicating the device and the loop through which the electric fast pulse group interferes the current in the teaching experiment process of the electric fast pulse group, and simultaneously can confirm whether the implemented anti-interference measures effectively enhance the EFT anti-interference capability of the experiment device or not through the brightness intensity or the sound volume of the indicating lamp in the indicating device so as to achieve the aim of experiment teaching training of the electromagnetic compatibility technology.
Drawings
Fig. 1 is a schematic structural diagram of the invention.
Fig. 2 is an EFT immunity test apparatus for single-phase ac input light-emitting display in embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of embodiment 2 of the present invention.
Fig. 4 is a schematic diagram of embodiment 3 of the present invention.
Fig. 5 is a schematic diagram of embodiment 4 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-5, in the embodiment of the present invention, the working schematic block diagram of the apparatus for teaching electrical fast burst immunity experiment is shown in fig. 1, and the apparatus comprises an ac rectification circuit-90, an indicating device-80 and a transistor-70 with a metal heat sink-71, wherein the indicating device-80 comprises an indicator light-21 and a sound alarm-22.
In the experimental device provided by the invention, the input end of an alternating current rectifying circuit-90 is connected with an alternating current input-91, the output positive end of the alternating current rectifying circuit-90 is connected to a transistor-70 through an indicating device-80, and then is connected back to the output negative end of the alternating current rectifying circuit-90 through the transistor-70, and meanwhile, a metal radiator-71 is connected to the ground.
The experimental device provided by the invention provides a path for EFT interference current through the grounding of the metal radiator-71, so that the indicator light-21 and the sound alarm-22 inside the indicating device-80 in the experimental device can be lightened and sounded in the EFT immunity test process. The lighting of the indicator light-21 can clearly display the loop and relevant devices through which the EFT interference current flows, and the brightness of the indicator light-21 and the sound intensity of the audible alarm-22 can clearly indicate the interference degree of the electric quick pulse group. When the rectification measure is implemented, the effective degree of the rectification measure can be conveniently confirmed by judging the brightness of the indicator lamp-21 and the sound intensity of the sound alarm-22.
Therefore, the experimental scheme and the experimental device for the immunity of the electric fast pulse group for teaching provided by the invention can clearly display a loop and related devices through which the electric fast pulse group interference current flows by lighting the indicator lamp-21, and can clearly indicate the interference degree of the electric fast pulse group by the brightness of the indicator lamp-21 and the sound intensity of the sound alarm-22. When the rectification measure is implemented, the effective degree of the rectification measure can be conveniently confirmed by judging the brightness of the indicator lamp-21 and the sound intensity of the sound alarm-22. Therefore, the blank of practical training in the electromagnetic compatibility training teaching is filled up, and the trained trainees can carry out the EFT immunity experiment by using the experimental device provided by the invention to deeply understand and master the anti-interference theory and the rectification technology in the electromagnetic compatibility.
Example one
According to the schematic block diagram of the EFT immunity experiment apparatus shown in fig. 1, the first embodiment of the invention is an EFT immunity experiment apparatus for single-phase ac input light-emitting display, and its circuit diagram is shown in fig. 2. The alternating current input is a single-phase input live wire L and a zero line N, and the alternating current rectification circuit is composed of a rectification bridge B1, a resistor R1, a capacitor C1 and an inductor L1; the indicating device is composed of light emitting diodes LED1 and LED 2; the transistor is a thyristor Q1; the "metal heat sink" is an aluminum heat sink HS1.
In a specific electrical connection mode of the embodiment, a live line L and a zero line N are respectively connected to an alternating current input end of a rectifier bridge B1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected to the output anode of the rectifier bridge B1, and the other end of the resistor R1 is connected to the inductor L1; the light emitting diodes LED1 and LED2 are reversely connected in parallel, and then one end of each light emitting diode is connected to the inductor L1, and the other end of each light emitting diode is connected to the anode of the thyristor Q1; the gate and the cathode of the thyristor Q1 are connected to the output cathode of the rectifier bridge B1 after short circuit; the thyristor Q1 is then reconnected to a grounded metal plate for EFT immunity testing via the heat sink HS1.
From the electrical connection shown in fig. 2, a path can be clearly provided for the electrical fast burst interference current, and the EFT interference current passes through the ac input live line L/zero line N, the resistor R1, the capacitor C1, the inductor L1, the light emitting diode LED1/LED2, the thyristor Q1, and the heat sink HS1. The positive polarity and negative polarity interference current in the electric fast pulse group test can be lightened through the light emitting diodes LED1 and LED2 which are connected in parallel in the positive and negative directions in the loop, so that the loop through which the electric fast pulse group interference current flows can be displayed clearly, and the training and teaching effects are achieved. Meanwhile, the luminous brightness of the LED1/LED2 is directly related to the magnitude of the electric fast pulse interference current, and the luminous brightness can just display the anti-interference improvement degree under different rectification measures.
Therefore, the first embodiment of the invention provides a path for the electric fast burst interference current, and the light emitting and brightness of the light emitting diodes LED1/LED2 in the path are used to clearly display the loop through which the electric fast burst interference current flows, and display the improvement degree of anti-interference under different adjustment measures, thereby playing a good role in training and teaching.
Example two
The second embodiment of the invention provides a function of sound alarm on the basis of the first embodiment, and a specific implementation circuit is shown in fig. 3, wherein ' alternating current input ' is a single-phase input live wire L and a zero wire N, and an alternating current rectification circuit ' consists of a rectifier bridge B1, a resistor R1, a capacitor C1 and an inductor L1; the indicating device is composed of a horn V1 and light emitting diodes LED1 and LED 2; the transistor is a thyristor Q1; the "metal heat sink" is an aluminum heat sink HS1.
The specific electrical connection mode of the second embodiment is that the live wire L and the zero wire N are respectively connected to the alternating current input end of the rectifier bridge B1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected to the output anode of the rectifier bridge B1, and the other end of the resistor R1 is connected to the inductor L1; one end of the horn V1 is connected to the inductor L1, and the other end of the horn V1 is connected to a connecting point of the light emitting diodes LED1 and LED2 which are connected in parallel in the reverse direction; one end of a connecting point of the light emitting diodes LED1 and LED2 which are connected in parallel in the reverse direction is connected to the horn V1, and the other end is connected to the anode of the thyristor Q1; the gate and the cathode of the thyristor Q1 are connected to the output cathode of the rectifier bridge B1 after short circuit; the thyristor Q1 is then reconnected to a grounded metal plate for EFT immunity testing via the heat sink HS1.
From the electrical connection shown in fig. 3, a path can be clearly provided for the electrical fast burst interference current, and the EFT interference current passes through the ac input live line L/zero line N, the resistor R1, the capacitor C1, the inductor L1, the horn V1, the light emitting diode LED1/LED2, the thyristor Q1, and the heat sink HS1. The interference current of positive polarity and negative polarity in the electric fast pulse group test can be lightened through the light emitting diodes LED1 and LED2 which are in positive and negative parallel connection in the loop, so that the loop through which the electric fast pulse group interference current flows can be displayed clearly, and the training and teaching effects are achieved. Meanwhile, the brightness of the light emitting diode LED1/LED2 and the sound of the loudspeaker V1 are directly related to the magnitude of the electric fast pulse interference current, and the brightness and the sound can just display the improvement degree of interference resistance under different adjustment measures.
Therefore, the first embodiment of the invention provides a path for the electric fast burst pulse interference current, and the circuit through which the electric fast burst pulse interference current flows is clearly displayed by utilizing the light emitting and the light emitting brightness of the light emitting diodes LED1/LED2 and the sound intensity of the loudspeaker V1 in the path, and the improvement degree of the anti-interference under different rectification measures is displayed, so that the training and teaching effects can be well played.
EXAMPLE III
The third embodiment of the invention is that a single-phase alternating current input is changed into a three-phase alternating current input on the basis of the first embodiment, other parts are the same, and a specific implementation circuit is shown in fig. 4, wherein the alternating current input is a three-phase alternating current input L1/L2/L3, and an alternating current rectification circuit consists of a rectification bridge B1, a resistor R1, a capacitor C1 and an inductor L1; the indicating device is composed of a light emitting diode LED1 and an LED 2; the transistor is a thyristor Q1; the "metal heat sink" is an aluminum heat sink HS1.
The specific electrical connection mode of the third embodiment is that three-phase alternating current inputs L1/L2/L3 are respectively connected to the alternating current input end of the three-phase rectifier bridge B1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected to the output anode of the rectifier bridge B1, and the other end of the resistor R1 is connected to the inductor L1; the light emitting diodes LED1 and LED2 are reversely connected in parallel, and then one end of each light emitting diode is connected to the inductor L1, and the other end of each light emitting diode is connected to the anode of the thyristor Q1; the gate and the cathode of the thyristor Q1 are connected to the output cathode of the rectifier bridge B1 after short circuit; the thyristor Q1 is then reconnected to a grounded metal plate for EFT immunity testing via the heat sink HS1.
From the electrical connection shown in fig. 4, a path is clearly provided for the electrical fast burst interference current, and the EFT interference current passes through the three-phase ac input L1/L2/L3, the resistor R1, the capacitor C1, the inductor L1, the light emitting diode LED1/LED2, the thyristor Q1 and the heat sink HS1. The interference current of positive polarity and negative polarity in the electric fast pulse group test can be lightened through the light emitting diodes LED1 and LED2 which are in positive and negative parallel connection in the loop, so that the loop through which the electric fast pulse group interference current flows can be displayed clearly, and the training and teaching effects are achieved. Meanwhile, the luminous brightness of the LED1/LED2 is directly related to the magnitude of the electric fast pulse interference current, and the luminous brightness can just display the anti-interference improvement degree under different rectification measures.
Therefore, the first embodiment of the invention provides a path for the electric fast pulse burst interference current, and the light emitting and the brightness of the light emitting diodes LED1/LED2 in the path are utilized to clearly display the loop through which the electric fast pulse burst interference current flows, and display the improvement degree of anti-interference under different adjustment measures, thereby playing a good role in training and teaching.
Example four
The fourth embodiment of the invention provides a sound alarm function on the basis of the third embodiment, and a specific implementation circuit is shown in fig. 5, wherein the 'alternating current input' is a three-phase alternating current input L1/L2/L3, and the 'alternating current rectification circuit' is composed of a rectifier bridge B1, a resistor R1, a capacitor C1 and an inductor L1; the indicating device is composed of a horn V1 and light emitting diodes LED1 and LED 2; the transistor is a thyristor Q1; the "metal heat sink" is an aluminum heat sink HS1.
The specific electrical connection mode of the third embodiment is that three-phase alternating current inputs L1/L2/L3 are respectively connected to the alternating current input end of the three-phase rectifier bridge B1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected to the output anode of the rectifier bridge B1, and the other end of the resistor R1 is connected to the inductor L1; one end of the horn V1 is connected to the inductor L1, and the other end of the horn V1 is connected to the connecting end of the light emitting diode LED1 and the LED2 which are connected in parallel in the reverse direction; the light emitting diodes LED1 and LED2 are reversely connected in parallel, and then one end of the light emitting diodes LED1 and one end of the light emitting diodes LED2 are connected to the horn V1, and the other end of the light emitting diodes LED1 and the other end of the light emitting diodes LED2 are connected to the anode of the thyristor Q1; the gate and the cathode of the thyristor Q1 are connected to the output cathode of the rectifier bridge B1 after short circuit; the thyristor Q1 is then reconnected to a grounded metal plate for EFT immunity testing via the heat sink HS1.
From the electrical connection shown in fig. 5, a path is clearly provided for the electrical fast burst interference current, and the EFT interference current passes through the three-phase ac input L1/L2/L3, the resistor R1, the capacitor C1, the inductor L1, the horn V1, the LEDs LED1/LED2, the thyristor Q1, and the heat sink HS1. The positive polarity and negative polarity interference current in the electric fast pulse group test can be lightened through the light emitting diodes LED1 and LED2 which are connected in parallel in the positive and negative directions in the loop, so that the loop through which the electric fast pulse group interference current flows can be displayed clearly, and the training and teaching effects are achieved. Meanwhile, the brightness of the light emitting diode LED1/LED2 and the sound of the loudspeaker V1 are directly related to the magnitude of the electric fast pulse interference current, and the brightness and the sound can just display the improvement degree of interference resistance under different adjustment measures.
Therefore, the first embodiment of the invention provides a path for the electric fast burst pulse interference current, and clearly displays the loop through which the electric fast burst pulse interference current flows by utilizing the light emitting and the brightness of the light emitting diodes LED1/LED2 and the sound of the loudspeaker V1 in the path, and displays the improvement degree of the anti-interference under different rectification measures, thereby being capable of well playing the role of training and teaching.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (1)
1. A teaching power utilization fast burst pulse immunity experimental device comprises an alternating current rectification circuit, an indicating device and a transistor with a metal radiator, and is characterized in that the alternating current rectification circuit consists of a rectification bridge B1, a resistor R1, a capacitor C1 and an inductor L1; the indicating device consists of a loudspeaker V1 and light emitting diodes LED1 and LED 2; the transistor is a thyristor Q1; the metal radiator is an aluminum radiator HS1;
the live line L and the zero line N are respectively connected to the alternating current input end of the rectifier bridge B1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected to the output anode of the rectifier bridge B1, and the other end of the resistor R1 is connected to the inductor L1; one end of the horn V1 is connected to the inductor L1, and the other end of the horn V1 is connected to a connecting point of the light emitting diodes LED1 and LED2 which are connected in parallel in the reverse direction; one end of a connecting point of the light emitting diodes LED1 and LED2 which are connected in parallel in the reverse direction is connected to the horn V1, and the other end is connected to the anode of the thyristor Q1; the gate and the cathode of the thyristor Q1 are connected to the output cathode of the rectifier bridge B1 after short circuit; then the thyristor Q1 is connected to a metal flat plate connected to the ground for the EFT immunity test through a radiator HS1;
wherein the brightness of the indicator light (21) and the sound level of the audible alarm (22) are used to indicate the degree of interference of the electrical burst pulses.
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