CN214252411U - Output voltage monitoring device of inverter - Google Patents
Output voltage monitoring device of inverter Download PDFInfo
- Publication number
- CN214252411U CN214252411U CN202120165658.3U CN202120165658U CN214252411U CN 214252411 U CN214252411 U CN 214252411U CN 202120165658 U CN202120165658 U CN 202120165658U CN 214252411 U CN214252411 U CN 214252411U
- Authority
- CN
- China
- Prior art keywords
- transformer
- sampling circuit
- power supply
- voltage
- output
- 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.)
- Active
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 62
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Inverter Devices (AREA)
Abstract
The utility model discloses an output voltage monitoring device of an inverter, which comprises a voltage sampling circuit, a filter, an adjustable gain amplifier, an adjustable phase shifter, a numerical control attenuator, an AD converter, a microprocessor and a display; the voltage sampling circuit is used for sampling the output voltage of the inverter power supply, the sampling output end of the voltage sampling circuit is connected with the AD converter sequentially through the filter, the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator, the output end of the AD converter is connected with the microprocessor, and the microprocessor is also connected with the display; the voltage sampling circuit comprises a transformer T, a capacitor C and a resistor R. The utility model discloses a transformer takes a sample again after stepping down inverter, has higher security, and simultaneously, electric capacity among the voltage sampling circuit can play the effect of separating direct traffic, realizes power filtering to in the voltage sample, through the external power supply of voltage sampling circuit.
Description
Technical Field
The utility model relates to an inverter, especially relate to an inverter's output voltage monitoring device.
Background
The inverter power supply is a DC/AC conversion device, converts a direct current power supply into an alternating current power supply with stable output voltage and frequency, and has very important and wide application in the electrical field.
In order to ensure the working stability of the inverter, the output voltage of the inverter needs to be monitored frequently, and in the monitoring process of a general inverter, the output of the inverter is directly sampled, and the voltage of the inverter is generally high, which may bring about certain potential safety hazards.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide an inverter's output voltage monitoring device, take a sample again after stepping down inverter through the transformer, reduced the potential safety hazard, simultaneously, electric capacity among the voltage sampling circuit can play the effect of separating direct traffic, realizes power filtering to in voltage sampling, through the external power supply of voltage sampling circuit.
The purpose of the utility model is realized through the following technical scheme: an output voltage monitoring device of an inverter power supply comprises a voltage sampling circuit, a filter, an adjustable gain amplifier, an adjustable phase shifter, a numerical control attenuator, an AD converter, a microprocessor and a display; the voltage sampling circuit is used for sampling the output voltage of the inverter power supply, the sampling output end of the voltage sampling circuit is connected with the AD converter sequentially through the filter, the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator, the output end of the AD converter is connected with the microprocessor, and the microprocessor is also connected with the display;
the voltage sampling circuit comprises a transformer T, a capacitor C and a resistor R, wherein the first end of the transformer is used for being connected with the positive output end of the inverter power supply, the second end of the transformer is used for being connected with the negative output end of the inverter power supply, the third end of the transformer is grounded, the fourth end of the transformer is connected to the power supply output end of the voltage sampling circuit through the capacitor C, one end of the resistor R is connected between the capacitor C and the power supply output end of the voltage sampling circuit, and the other end of the resistor R is connected to the sampling output end of the voltage sampling circuit.
Preferably, the output voltage monitoring device further comprises a memory, and the memory is connected with the microprocessor; the output voltage monitoring device also comprises a real-time clock module, and the real-time clock module is connected with the microprocessor; the transformer consists of an iron core, a primary coil wound on the iron core and a secondary coil wound on the iron core, wherein one end of the primary coil of the transformer is used as the first end of the transformer, the other end of the primary coil is used as the second end of the transformer, one end of the secondary coil of the transformer is used as the third end of the transformer, and the other two ends of the secondary coil are used as the fourth end of the transformer; the transformer is a step-down transformer, and the number of turns of a primary coil of the transformer is 20 times that of the secondary coil.
The utility model has the advantages that: the voltage sampling circuit of the utility model samples the inverted power supply after reducing the voltage through the transformer, has higher safety, and simultaneously, the capacitor in the voltage sampling circuit can play the role of isolating direct traffic and realize power filtering, so that the power supply output end of the voltage sampling circuit supplies power to the outside when the sampling output end outputs sampling signals to the outside; the sampling signal output by the voltage sampling circuit is subjected to conditioning such as filtering, amplification, phase shifting, attenuation and the like, and then is subjected to AD conversion, and the gain and the phase of the sampling signal are adjustable based on the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator, so that the requirement on the measuring range of the AD converter can be reduced, and the precision of the sampling signal is improved; the sampling signal is transmitted to the microprocessor after being subjected to AD conversion, and is displayed through the display so as to be convenient for monitoring of workers.
Drawings
FIG. 1 is a schematic block diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of a voltage sampling circuit.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, an output voltage monitoring apparatus of an inverter power supply includes a voltage sampling circuit, a filter, an adjustable gain amplifier, an adjustable phase shifter, a digital control attenuator, an AD converter, a microprocessor, and a display; the voltage sampling circuit is used for sampling the output voltage of the inverter power supply, the sampling output end OUT of the voltage sampling circuit is connected with the AD converter through the filter, the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator in sequence, the output end of the AD converter is connected with the microprocessor, and the microprocessor is also connected with the display;
as shown in fig. 2, the voltage sampling circuit includes a transformer T, a capacitor C, and a resistor R, a first end of the transformer is used for connecting a positive output end of the inverter power supply, a second end of the transformer is used for connecting a negative output end of the inverter power supply, a third end of the transformer is grounded, a fourth end of the transformer is connected to a power supply output end V-OUT of the voltage sampling circuit through the capacitor C, one end of the resistor R is connected between the capacitor C and the power supply output end of the voltage sampling circuit, and the other end of the resistor R is connected to a sampling output end of the voltage sampling circuit.
In an embodiment of the present application, the output voltage monitoring apparatus further includes a memory, and the memory is connected to the microprocessor; the output voltage monitoring device also comprises a real-time clock module, and the real-time clock module is connected with the microprocessor; the transformer consists of an iron core, a primary coil wound on the iron core and a secondary coil wound on the iron core, wherein one end of the primary coil of the transformer is used as the first end of the transformer, the other end of the primary coil is used as the second end of the transformer, one end of the secondary coil of the transformer is used as the third end of the transformer, and the other two ends of the secondary coil are used as the fourth end of the transformer; the transformer is a step-down transformer, and the number of turns of a primary coil of the transformer is 20 times that of the secondary coil.
The working principle of the utility model is as follows: firstly, the output voltage of the inverter power supply is sampled through a voltage sampling circuit, and the inverter power supply is firstly reduced through a transformer to avoid potential safety hazards caused by high voltage in consideration of the fact that the inverter power supply generally has higher voltage; because the inverter provides alternating current, the effect of blocking direct current and alternating current of the capacitor in the sampling circuit realizes power filtering, so that the voltage sampling circuit of the utility model can output sampling signals through the sampling output end OUT and can also supply power to the outside stably through the voltage output end V-OUT; the sampling signal output by the voltage sampling circuit is subjected to conditioning such as filtering, amplification, phase shifting, attenuation and the like, and then is subjected to AD conversion, and the gain and the phase of the sampling signal are adjustable based on the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator, so that the requirement on the measuring range of the AD converter can be reduced, and the precision of the sampling signal is improved; the sampling signal is transmitted to the microprocessor after being subjected to AD conversion, and is displayed through the display so as to be convenient for monitoring of workers.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (5)
1. An output voltage monitoring device of an inverter power supply is characterized in that: the digital phase-locked loop comprises a voltage sampling circuit, a filter, an adjustable gain amplifier, an adjustable phase shifter, a numerical control attenuator, an AD converter, a microprocessor and a display; the voltage sampling circuit is used for sampling the output voltage of the inverter power supply, the sampling output end of the voltage sampling circuit is connected with the AD converter sequentially through the filter, the adjustable gain amplifier, the adjustable phase shifter and the numerical control attenuator, the output end of the AD converter is connected with the microprocessor, and the microprocessor is also connected with the display;
the voltage sampling circuit comprises a transformer T, a capacitor C and a resistor R, wherein the first end of the transformer is used for being connected with the positive output end of the inverter power supply, the second end of the transformer is used for being connected with the negative output end of the inverter power supply, the third end of the transformer is grounded, the fourth end of the transformer is connected to the power supply output end of the voltage sampling circuit through the capacitor C, one end of the resistor R is connected between the capacitor C and the power supply output end of the voltage sampling circuit, and the other end of the resistor R is connected to the sampling output end of the voltage sampling circuit.
2. The apparatus for monitoring an output voltage of an inverter power supply according to claim 1, wherein: the output voltage monitoring device further comprises a memory, and the memory is connected with the microprocessor.
3. The apparatus for monitoring an output voltage of an inverter power supply according to claim 2, wherein: the output voltage monitoring device further comprises a real-time clock module, and the real-time clock module is connected with the microprocessor.
4. The apparatus for monitoring an output voltage of an inverter power supply according to claim 1, wherein: the transformer comprises an iron core, a primary coil wound on the iron core and a secondary coil wound on the iron core, wherein one end of the primary coil of the transformer is used as the first end of the transformer, the other end of the primary coil is used as the second end of the transformer, one end of the secondary coil of the transformer is used as the third end of the transformer, and the other two ends of the secondary coil are used as the fourth end of the transformer.
5. The apparatus for monitoring an output voltage of an inverter power supply according to claim 1, wherein: the transformer is a step-down transformer, and the number of turns of a primary coil of the transformer is 20 times that of the secondary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120165658.3U CN214252411U (en) | 2021-01-21 | 2021-01-21 | Output voltage monitoring device of inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120165658.3U CN214252411U (en) | 2021-01-21 | 2021-01-21 | Output voltage monitoring device of inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214252411U true CN214252411U (en) | 2021-09-21 |
Family
ID=77752316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120165658.3U Active CN214252411U (en) | 2021-01-21 | 2021-01-21 | Output voltage monitoring device of inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214252411U (en) |
-
2021
- 2021-01-21 CN CN202120165658.3U patent/CN214252411U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204679548U (en) | A kind of unicoil magnetic modulation type residual current detection device | |
| CN201562001U (en) | Direct current bus voltage sampler of intermediate-voltage transducer | |
| CN110828101B (en) | Power transformer demagnetization and remanence measurement device | |
| WO2018035931A1 (en) | Voltage detection device for battery terminal | |
| WO2011029018A2 (en) | Voltage conversion and/or electrical measurements from 400 volts upwards | |
| CN103543323A (en) | Current detection device for large direct current charge-discharge facility | |
| CN202261024U (en) | Intelligent type DC high voltage generator | |
| CN203838218U (en) | Electronic current transformer | |
| CN214252411U (en) | Output voltage monitoring device of inverter | |
| CN209070006U (en) | A kind of current sensor | |
| CN102023248B (en) | Direct current bus voltage sampling device of medium-voltage frequency converter | |
| CN205123588U (en) | It turns over to keep apart swashs formula high frequency switching power supply and input voltage detection circuitry thereof | |
| CN205038257U (en) | Electric alternating current that asks for keeps apart changer | |
| CN111965413B (en) | Current measuring method | |
| CN210724175U (en) | Fault detection device based on high-frequency rectification module | |
| CN103743941A (en) | Wireless communication clamp alternating current ammeter without power supply | |
| CN203825088U (en) | Harmonic-wave detection device | |
| CN216351137U (en) | Power signal acquisition circuit | |
| CN213072095U (en) | Nanocrystalline magnetic core current transformer overcurrent protection circuit | |
| CN104407208B (en) | A kind of system of utilization circuit energy based on the relatively quasi- current in resistance property measurement of the positive inverse transformations of Fourier FFT | |
| CN103338025A (en) | A power frequency induction adjustable resonance apparatus and a frequency modulation method thereof for determining a power frequency in-series resonant condition | |
| CN209248380U (en) | A kind of electricity-getting switch control device | |
| CN203572875U (en) | Current detection device for large direct current charge-discharge facility | |
| CN218938414U (en) | Multi-frequency voltage withstand test device | |
| CN213843360U (en) | Alternating voltage sampling circuit and switching power supply with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An output voltage monitoring device for inverter power supply Effective date of registration: 20211210 Granted publication date: 20210921 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Juqiao sub branch Pledgor: CHENGDU JINGCHENG ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2021510000295 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230106 Granted publication date: 20210921 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Juqiao sub branch Pledgor: CHENGDU JINGCHENG ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2021510000295 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An output voltage monitoring device for inverter Effective date of registration: 20230110 Granted publication date: 20210921 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Juqiao sub branch Pledgor: CHENGDU JINGCHENG ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2023510000011 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231220 Granted publication date: 20210921 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Juqiao sub branch Pledgor: CHENGDU JINGCHENG ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2023510000011 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An output voltage monitoring device for inverter power supply Effective date of registration: 20231225 Granted publication date: 20210921 Pledgee: Chengdu Rural Commercial Bank Co.,Ltd. Juqiao sub branch Pledgor: CHENGDU JINGCHENG ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2023510000279 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |