CN115128498A - Power plug-in test circuit and device - Google Patents
Power plug-in test circuit and device Download PDFInfo
- Publication number
- CN115128498A CN115128498A CN202210815362.0A CN202210815362A CN115128498A CN 115128498 A CN115128498 A CN 115128498A CN 202210815362 A CN202210815362 A CN 202210815362A CN 115128498 A CN115128498 A CN 115128498A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- power supply
- power
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01R31/40—Testing power supplies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a power supply plug-in test circuit and a device, wherein the test circuit comprises an electromagnetic interference filter circuit, an input rectification filter circuit, an isolation transformer and an output rectification filter circuit which are sequentially connected. The power supply plug-in test circuit and the device can convert commercial power into direct current of DC220V and DC110V, the direct current is introduced into the input end of the power supply plug-in, and the output end of the power supply plug-in is detected to have 24V output. The power supply plug-in units in stock are electrified and detected regularly, the power supply plug-in units with hidden danger can be found in time, the problem of the power supply plug-in units out of the stock is solved, the working efficiency can be improved, the time for power failure of equipment is shortened, and the safe and reliable operation of a power grid is guaranteed.
Description
Technical Field
The invention relates to the technical field of power supply plug-in test, in particular to a power supply plug-in test circuit and a power supply plug-in test device.
Background
In daily work, the replacement of power supply plug-ins is common work of continuous shift protection, but because part of the power supply plug-ins are poor in storage environment and too long in purchase time, electronic components are easily damaged, and the plug-ins cannot be normally used. However, before the plug-in is used, a user cannot judge whether the plug-in is intact, often the power plug-in is brought to a working site, and the plug-in is subjected to power supply test after being replaced, so that the plug-in cannot be normally used. This greatly reduces the efficiency of the repair, affects the equipment recovery time, and wastes a great deal of time and labor.
Disclosure of Invention
The invention aims to provide a power supply plug-in test circuit and a power supply plug-in test device, which can solve the problems that the fault of a power supply plug-in cannot be found in advance, the first-aid repair efficiency is greatly reduced, and the recovery time of equipment is influenced in the prior art.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a power supply plug-in test circuit, including: the input end of the electromagnetic interference filter circuit is used as the input end of the power plug-in test circuit to be connected with mains supply voltage, and the output end of the electromagnetic interference filter circuit is connected with the input end of the input rectification filter circuit; the output end of the input rectifying filter circuit is connected with the primary side of the isolation transformer, the secondary side of the isolation transformer is connected with the input end of the output rectifying filter circuit, the output end of the output rectifying filter circuit is used as the output end of the power plug-in test circuit to output direct current voltage, power is provided for the power plug-in to be detected, the output end of the power plug-in is detected, and 24V voltage is output to determine that the power plug-in is fault-free.
Furthermore, the power supply plug-in test circuit further comprises a sampling amplifying circuit, a photoelectric coupling circuit and a PWM control circuit, wherein the input end of the sampling amplifying circuit is connected with the output end of the output rectifying and filtering circuit, the input end of the photoelectric coupling circuit is connected with the output end of the sampling amplifying circuit, the input end of the PWM control circuit is connected with the output end of the photoelectric coupling circuit, and the output end of the PWM control circuit is connected with the primary side of the isolation transformer.
In a second aspect, the invention provides a power supply plug-in test device, which comprises a housing and the power supply plug-in test circuit, wherein the power supply plug-in test circuit is arranged in the housing.
Furthermore, an input terminal and an output terminal are arranged on the shell, the input terminal is electrically connected with the input end of the power supply plug-in test circuit, and the output terminal is electrically connected with the output end of the power supply plug-in test circuit.
Furthermore, the front panel of shell sets up the display screen, and when power plug-in components inserted power plug-in components testing arrangement, the output voltage of power plug-in components that await measuring is shown to the display screen.
The power supply plug-in test circuit and the device can convert commercial power into direct current of DC220V and DC110V, and the direct current is connected to the input end of the power supply plug-in, and the output end of the power supply plug-in is detected to have 24V output. The power supply plug-in units in stock are electrified and detected regularly, the power supply plug-in units with hidden danger can be found in time, the problem of the power supply plug-in units out of the stock is solved, the working efficiency can be improved, the time for power failure of equipment is shortened, and the safe and reliable operation of a power grid is guaranteed.
Drawings
FIG. 1 is a circuit block diagram of a power card test circuit of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The power supply plug-in test circuit of the invention, as shown in fig. 1, includes: the power supply plug-in test circuit comprises an electromagnetic interference filter circuit (also called an EMI filter circuit), an input rectification filter circuit, an isolation transformer and an output rectification filter circuit, wherein the input end of the electromagnetic interference filter circuit is used as the input end of the power supply plug-in test circuit to be connected with mains supply voltage, and the output end of the electromagnetic interference filter circuit is connected with the input end of the input rectification filter circuit. The output end of the input rectifying filter circuit is connected with the primary side of the isolation transformer, the secondary side of the isolation transformer is connected with the input end of the output rectifying filter circuit, the output end of the output rectifying filter circuit is used as the output end of the power supply plug-in test circuit to output direct current voltage, power is supplied to the power supply plug-in to be detected, the output end of the power supply plug-in is detected, and 24V voltage is output to determine that the power supply plug-in is free of faults.
Preferably, the power supply plug-in test circuit further comprises a sampling amplifying circuit, a photoelectric coupling circuit and a PWM control circuit, wherein an input end of the sampling amplifying circuit is connected to an output end of the output rectifying filter circuit, an input end of the photoelectric coupling circuit is connected to an output end of the sampling amplifying circuit, an input end of the PWM control circuit is connected to an output end of the photoelectric coupling circuit, and an output end of the PWM control circuit is connected to a primary side of the isolation transformer.
The working principle of the circuit block diagram is as follows: the input commercial power Alternating Current (AC) is filtered to remove electromagnetic interference signals after passing through the electromagnetic interference filter circuit, and then is rectified by the input rectifying filter circuit to obtain a high-voltage DC voltage, and the voltage is connected to the exchange element to be used as a switch in a high-frequency state of 20-100 KHZ. At this time, the direct current high voltage is cut into a high-frequency square wave signal, the square wave signal is converted by the power isolation transformer, a preset direct current voltage value can be obtained on the secondary side of the isolation transformer, and then the direct current voltage required by the power plug-in can be obtained by the output rectifying and filtering circuit. The sampling amplifying circuit samples and outputs the voltage at the output end of the rectifying and filtering circuit, and the voltage is fed back to the PWM control circuit after passing through the photoelectric coupling circuit. And comparing the error of the DC voltage value set by the sampled voltage value, and if the error exceeds a set threshold value, controlling the frequency and amplitude of the primary side input voltage of the isolation transformer by the PWM control circuit to ensure that the voltage value output by the output rectifying and filtering circuit is within a preset voltage value range. The PWM control circuit can adjust the gap oscillation and improve the power factor.
AC/DC conversion is the conversion of alternating current to direct current, the power flow of which may be bi-directional, with power flow from the source to the load being referred to as "rectification" and power flow from the load back to the source being referred to as "active inversion". The AC/DC converter inputs 50/60Hz AC power, and must be rectified and filtered, so a relatively large filter capacitor is necessary, and when meeting the safety standards (e.g. UL, CCEE, etc.) and EMC command limits (e.g. IEC, FCC, CSA), EMI filtering and the use of components meeting the safety standards are necessary on the AC input side, thus limiting the miniaturization of the AC/DC power supply. In addition, because of the action of the internal high-frequency, high-voltage and large-current switches, the difficulty in solving the problem of EMC electromagnetic compatibility is increased, and high requirements are also provided for the design of an internal high-density mounting circuit.
DC/DC conversion is the conversion of a fixed DC voltage into a variable DC voltage, also known as DC chopping.
The chopper has two working modes, namely a pulse width modulation mode Ts is unchanged, and ton (general purpose) is changed, and a frequency modulation mode, wherein ton is unchanged, and Ts is changed (interference is easy to generate). The specific circuit is composed of the following types:
(1) buck circuit: and the output average voltage Uo of the step-down chopper is smaller than the input voltage Ui, and the polarities of the output average voltage Uo are the same.
(2) A Boost circuit: and the output average voltage Uo of the boost chopper is greater than the input voltage Ui, and the polarities of the output average voltage Uo are the same.
(3) Buck-Boost circuit: the output average voltage Uo of the buck or boost chopper is larger than or smaller than the input voltage Ui, the polarity is opposite, and the buck or boost chopper is transmitted by an inductor.
(4) A Cuk circuit: and the output average voltage Uo of the buck or boost chopper is greater than or less than the input voltage UI, the polarities are opposite, and the output average voltage Uo is transmitted through a capacitor.
The power supply plug-in test device comprises a shell and the power supply plug-in test circuit, wherein the power supply plug-in test circuit is arranged in the shell.
Furthermore, an input terminal and an output terminal are arranged on the shell, the input terminal is electrically connected with the input end of the power supply plug-in test circuit, and the output terminal is electrically connected with the output end of the power supply plug-in test circuit.
Furthermore, the front panel of shell sets up the display screen, and when power plug-in components inserted power plug-in components testing arrangement, the output voltage of power plug-in components that await measuring is shown to the display screen.
In the description of the present invention, it is to be understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless expressly stated or limited otherwise, the first feature may be "on" the second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. "plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (5)
1. A power card test circuit, comprising: the input end of the electromagnetic interference filter circuit is used as the input end of the power plug-in test circuit to be connected with mains supply voltage, and the output end of the electromagnetic interference filter circuit is connected with the input end of the input rectification filter circuit; the output end of the input rectifying filter circuit is connected with the primary side of the isolation transformer, the secondary side of the isolation transformer is connected with the input end of the output rectifying filter circuit, the output end of the output rectifying filter circuit is used as the output end of the power plug-in test circuit to output direct current voltage, power is provided for the power plug-in to be detected, the output end of the power plug-in is detected, and 24V voltage is output to determine that the power plug-in is fault-free.
2. The power supply package test circuit of claim 1, further comprising a sampling and amplifying circuit, a photo-coupler circuit and a PWM control circuit, wherein an input terminal of the sampling and amplifying circuit is connected to an output terminal of the output rectifying and filtering circuit, an input terminal of the photo-coupler circuit is connected to an output terminal of the sampling and amplifying circuit, an input terminal of the PWM control circuit is connected to an output terminal of the photo-coupler circuit, and an output terminal of the PWM control circuit is connected to a primary side of an isolation transformer.
3. A power card testing apparatus comprising a housing, and further comprising a power card testing circuit as claimed in claim 1 or 2, the power card testing circuit being disposed within the housing.
4. The device of claim 3, wherein the housing has an input terminal and an output terminal, the input terminal being electrically connected to the input of the power plug-in test circuit, the output terminal being electrically connected to the output of the power plug-in test circuit.
5. The power supply plug-in test device of claim 3, wherein a display screen is arranged on the front panel of the shell, and when the power supply plug-in is connected to the power supply plug-in test device, the display screen displays the output voltage of the power supply plug-in to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210815362.0A CN115128498A (en) | 2022-07-08 | 2022-07-08 | Power plug-in test circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210815362.0A CN115128498A (en) | 2022-07-08 | 2022-07-08 | Power plug-in test circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115128498A true CN115128498A (en) | 2022-09-30 |
Family
ID=83383247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210815362.0A Pending CN115128498A (en) | 2022-07-08 | 2022-07-08 | Power plug-in test circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115128498A (en) |
-
2022
- 2022-07-08 CN CN202210815362.0A patent/CN115128498A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9300241B2 (en) | Methods and systems for reducing conducted electromagnetic interference | |
| CN109194101A (en) | Portable multi-type high-voltage power supply | |
| CN204928349U (en) | Automatic uninterrupted power source device of monocell | |
| CN102916571B (en) | Power supply capable of suppressing low-frequency noises | |
| CN211266773U (en) | High-frequency three-phase safety power supply device and high-frequency three-phase safety power supply system | |
| CN103051211A (en) | Power adapter | |
| CN102594122B (en) | Power adaptor | |
| CN100405731C (en) | Low interference frequency change power for high-voltage testing | |
| CN110888086A (en) | Circuit electric leakage detection positioning system based on signal injection | |
| CN103997199A (en) | Active power factor correction circuit with fault detection function | |
| CN202435263U (en) | Power adapter | |
| CN115128498A (en) | Power plug-in test circuit and device | |
| CN110780233A (en) | Circuit electric leakage detection system based on signal injection | |
| CN209746083U (en) | Offline simulation debugging device for arc suppression coil | |
| CN217486380U (en) | Filtering device for eliminating electric fast transient pulse group interference | |
| CN112448590A (en) | High-frequency single-phase safety power supply device and system | |
| CN109495000A (en) | A kind of high pressure generator power supply | |
| CN215468705U (en) | Direct current welding circuit system | |
| CN210041665U (en) | Intelligent direct-current high-voltage power supply | |
| CN210201719U (en) | Wireless while-drilling instrument generator converter parallel device | |
| CN205283408U (en) | Motor test electrical power generating system | |
| CN209613252U (en) | A kind of frequency conversion dual-pulse power supply | |
| CN209267467U (en) | A kind of high pressure generator power supply | |
| CN210839360U (en) | High-frequency single-phase safety power supply device and system | |
| CN102983762B (en) | Power supply of electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |