CN207541145U - Isolated busbar voltage detection circuit - Google Patents
Isolated busbar voltage detection circuit Download PDFInfo
- Publication number
- CN207541145U CN207541145U CN201721436643.6U CN201721436643U CN207541145U CN 207541145 U CN207541145 U CN 207541145U CN 201721436643 U CN201721436643 U CN 201721436643U CN 207541145 U CN207541145 U CN 207541145U
- Authority
- CN
- China
- Prior art keywords
- busbar voltage
- transformer
- pins
- pin
- circuit
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
A kind of isolated busbar voltage detection circuit, it includes busbar voltage V and transformer T, busbar voltage V access transformer T pins 1, 2 armature winding, the secondary windings of transformer T pins 4 and pin 5 is used for primary circuit, the transformer T pins 4 and pin 3 are provided with newly-increased winding, carry out isolation transformation, rectification filtering module and partial pressure filter circuit are also associated in pin 3, the rectification filtering module includes diode D1 and capacitance C1, the partial pressure filter circuit includes, resistance R1, R2, R3, capacitance C2 and C3, generation is suitably AD converted with the direct voltage output that busbar voltage changes in proportion to microcontroller, finally obtain the numerical value of busbar voltage.The utility model only increases a winding on the transformer of original Switching Power Supply, is achieved that and busbar voltage is detected in real time, circuit is simple, of low cost, there is very big practical value.
Description
Technical field
The utility model is related to a kind of circuit for detecting voltage, specifically a kind of isolated busbar voltage detection electricity
Road.
Background technology
Busbar voltage detection is widely used in frequency converter and servo-drive system, in order to control busbar voltage, ensures
Drive control circuit works normally, it is necessary to which busbar voltage is detected in real time.Control in frequency converter and servo-drive system at present
Circuit voltage is all generated by inverse-excitation type switch power-supply, and linear transformer, line need to separately be added by normally isolating formula busbar voltage detection circuit
Property optocoupler or Hall voltage sensor are isolated, but circuit is more complicated or cost is higher.Patent Office is in December, 2011
Disclosed in 14 days, the direct current bus voltage detecting circuit of the low voltage frequency converter of Publication No. CN102279304A, it includes filtering
Device, high frequency transformer and voltage sample output circuit, the primary side of the high frequency transformer pass through the wave filter and dc bus
It is connected, the voltage sample output circuit includes secondary corresponding with the primary side of the lower winding of the high frequency transformer, Yi Jiyu
The filter circuit that the output terminal of the secondary is connected.Although this busbar voltage detection circuit has carried out isolation transformation and rectification,
But due to not having pressure limiting and partial pressure, it is easily damaged microcontroller.
Invention content
The purpose of this utility model is that it is in view of the above-mentioned defects in the prior art and insufficient, provide a kind of circuit letter for people
It is single, low-cost isolated busbar voltage detection circuit.
Technical solution adopted in the utility model is to achieve the above object：The isolated busbar voltage detection circuit,
It includes busbar voltage V and transformer T, the armature winding of busbar voltage V access transformer T pins 1,2,4 He of transformer T pins
The secondary windings of pin 5 is used for primary circuit, and the transformer T pins 4 and pin 3 are provided with newly-increased winding, are isolated
Transformation is also associated with rectification filtering module and partial pressure filter circuit in pin 3, which includes diode D1 and electricity
Hold C1, the partial pressure filter circuit includes, resistance R1, R2, R3, capacitance C2 and C3, generates suitably year-on-year with busbar voltage
The direct voltage output of example variation is AD converted to microcontroller, finally obtains the numerical value of busbar voltage.
The output terminal of the diode D1 is connected with clamper pressure limiting module, which includes resistance R1 and two
Pole pipe D2, limitation output voltage are no more than 5.6V.
The busbar voltage V is inputted by transformer T pins 1, is modulated by the switch pipe Q of pin 2.
The utility model only increases a winding on the transformer of original Switching Power Supply, is achieved that busbar electricity
Pressure is detected in real time, and circuit is simple, of low cost, there is very big practical value.Clamper pressure limiting module can limit output voltage
No more than 5.6V, to protect microcontroller, resistance R1, R2, R3, capacitance C2 and C3 composition partial pressure filter circuit, generate suitably with
The direct voltage output that busbar voltage changes in proportion is AD converted to microcontroller, finally obtains the numerical value of busbar voltage.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
Specific embodiment
As shown in Figure 1, the utility model is a kind of isolated busbar voltage detection circuit, it includes busbar voltage V and change
The armature winding of depressor T, busbar voltage V access transformer T pins 1,2, the busbar voltage V are defeated by transformer T pins 1
Enter, modulated by the switch pipe Q of pin 2.Secondary windings is provided between transformer T pins 4 and pin 5, is exported
Voltage be stable after diode D rectifying and wave-filterings, original circuit is supplied to use.
The transformer T pins 4 and pin 3 are provided with newly-increased winding, realize transformer isolation transformation function.In pin
3 are also associated with rectification filtering module and partial pressure filter circuit, which includes diode D1 and capacitance C1, due to same
Name end is on the contrary, the DC voltage that the voltage of output generates after diode D1 and capacitance C1 rectifying and wave-filterings is with busbar voltage
Variation and in proportion change.The partial pressure filter circuit includes, resistance R1, R2, R3, capacitance C2 and C3, and it is suitable to generate
Be AD converted with the direct voltage output that busbar voltage changes in proportion to microcontroller, finally obtain the number of busbar voltage
Value.The output terminal of the diode D1 is connected with clamper pressure limiting module, which includes resistance R1 and diode
D2, limitation output voltage is no more than 5.6V, to protect microcontroller.
The utility model only increases a winding on the transformer of original Switching Power Supply, is achieved that busbar electricity
Pressure is detected in real time, and circuit is simple, of low cost, there is very big practical value.Clamper pressure limiting module can limit output voltage
No more than 5.6V, to protect microcontroller, resistance R1, R2, R3, capacitance C2 and C3 composition partial pressure filter circuit, generate suitably with
The direct voltage output that busbar voltage changes in proportion is AD converted to microcontroller, finally obtains the numerical value of busbar voltage.
Claims (3)
1. a kind of isolated busbar voltage detection circuit, it includes busbar voltage V and transformer T, busbar voltage V access transformers
The secondary windings of the armature winding of T pins 1,2, transformer T pins 4 and pin 5 is used for primary circuit, it is characterised in that described
Transformer T pins 4 and pin 3 are provided with newly-increased winding, carry out isolation transformation, pin 3 be also associated with rectification filtering module and
Partial pressure filter circuit, which includes diode D1 and capacitance C1, the partial pressure filter circuit include, resistance
R1, R2, R3, capacitance C2 and C3 are generated and are suitably carried out with the direct voltage output that busbar voltage changes in proportion to microcontroller
AD conversion finally obtains the numerical value of busbar voltage.
2. isolated busbar voltage detection circuit according to claim 1, it is characterised in that the diode D1's is defeated
Outlet is connected with clamper pressure limiting module, which includes resistance R1 and diode D2, and limitation output voltage is no more than
5.6V。
3. isolated busbar voltage detection circuit according to claim 1 or 2, it is characterised in that the busbar voltage V
It inputs by transformer T pins 1, is modulated by the switch pipe Q of pin 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721436643.6U CN207541145U (en) | 2017-11-01 | 2017-11-01 | Isolated busbar voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721436643.6U CN207541145U (en) | 2017-11-01 | 2017-11-01 | Isolated busbar voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207541145U true CN207541145U (en) | 2018-06-26 |
Family
ID=62611888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721436643.6U Active CN207541145U (en) | 2017-11-01 | 2017-11-01 | Isolated busbar voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207541145U (en) |
-
2017
- 2017-11-01 CN CN201721436643.6U patent/CN207541145U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104242249B (en) | A kind of protection circuit of Switching Power Supply | |
| CN105322810B (en) | Power conversion device and protection method thereof when current feedback signal is abnormal | |
| CN106208369B (en) | A kind of on-line monitoring device of intelligent type low-voltage circuit breaker | |
| CN201589806U (en) | Direct current isolation sampling device | |
| CN204131401U (en) | A kind of photovoltaic DC-to-AC converter DC/DC booster circuit | |
| CN101969722B (en) | LED drive circuit and LED lamp | |
| CN206834988U (en) | A kind of anti exciting converter based on digit chip | |
| CN203941243U (en) | A kind of three-phase electric power open phase testing circuit | |
| CN202931197U (en) | Flyback converter based on transformer transformation | |
| CN207541145U (en) | Isolated busbar voltage detection circuit | |
| CN203595790U (en) | Passive switch isolation detection apparatus | |
| CN206557279U (en) | zero-crossing detection circuit | |
| CN212364406U (en) | Half-cycle alternating current sampling circuit | |
| CN205544882U (en) | But control front end network management set power | |
| CN202256445U (en) | Voltage detection circuit | |
| CN203561673U (en) | Boosting rectification transformer current sampling circuit | |
| CN202940735U (en) | Power amplifier used for intelligent transformer substation test system | |
| CN104638921A (en) | DC-DC conversion power supply circuit for data collector | |
| CN205648137U (en) | Electricity -saving appliance with drive unit | |
| CN203289194U (en) | Level raiser of wireless communication-based remote monitoring system of distribution transformer | |
| CN206341147U (en) | The DC/DC translation circuits and charging pile of a kind of Width funtion output area | |
| CN202750027U (en) | Neutral line-free intelligent three-phase rectification voltage adjusting device | |
| CN203324343U (en) | Anti-electric-larceny single-phase electric energy meter | |
| CN205847103U (en) | A kind of DC DC power module | |
| CN106647492A (en) | Alternating-current switching value signal acquisition circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |