CN217305311U - Input stage circuit signal monitoring circuit and coating film power supply - Google Patents
Input stage circuit signal monitoring circuit and coating film power supply Download PDFInfo
- Publication number
- CN217305311U CN217305311U CN202220655295.6U CN202220655295U CN217305311U CN 217305311 U CN217305311 U CN 217305311U CN 202220655295 U CN202220655295 U CN 202220655295U CN 217305311 U CN217305311 U CN 217305311U
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- resistor
- way
- resistors
- 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
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides an input stage circuit signal monitoring circuit and coating film power supply, including alternating current power supply, two-way crisscross voltage stabilizing circuit that steps up, voltage detection circuit, double-circuit current detection circuit, first buffer circuit, second buffer circuit and control circuit, alternating current power supply with two-way crisscross voltage stabilizing circuit that steps up connects, voltage detection circuit's input respectively with alternating current power supply with two-way crisscross voltage stabilizing circuit's that steps up output is connected, its output with the second buffer circuit is connected, double-circuit current detection circuit's input with two-way crisscross voltage stabilizing circuit that steps up connects, its output with first buffer circuit connects, first buffer circuit with second buffer circuit all with control circuit connects. The utility model discloses have the signal isolation function, can monitor the electric current and the voltage signal of input stage circuit, improve product reliability.
Description
Technical Field
The utility model relates to a power technical field especially relates to an input stage circuit signal monitoring circuit and coating film power.
Background
The existing film coating power supply generally has few comprehensive monitoring functions, and particularly lacks the monitoring of voltage and current of an input stage, so that the failure rate is high. In order to improve the product quality of the film-coated power supply, it is necessary to provide a technical solution capable of monitoring the signal of the input stage circuit of the power supply to improve the reliability of the product.
SUMMERY OF THE UTILITY MODEL
The utility model provides an input stage circuit signal monitoring circuit and coating film power for it all has comprehensive monitoring function generally to solve among the prior art coating film power, especially lacks the control of the voltage and current of input stage, leads to the defect that the failure rate is high.
The utility model provides an input stage circuit signal monitoring circuit, including alternating current power supply, two-way crisscross boost voltage stabilizing circuit, voltage detection circuit, double-circuit current detection circuit, first buffer circuit, second buffer circuit and control circuit, alternating current power supply with two-way crisscross boost voltage stabilizing circuit connects, voltage detection circuit's input respectively with alternating current power supply with two-way crisscross boost voltage stabilizing circuit's output is connected, its output with the second buffer circuit is connected, double-circuit current detection circuit's input with two-way crisscross boost voltage stabilizing circuit connects, its output with first buffer circuit connects, first buffer circuit with second buffer circuit all with control circuit connects.
Further, the alternating current power supply is a three-phase alternating current power supply.
Further, double-circuit current detection circuitry includes that double-circuit current changes voltage unit, reference voltage unit, double-circuit voltage comparing element and level shift unit, double-circuit current change voltage unit with the reference voltage unit respectively with double-circuit voltage comparing element's input is connected, double-circuit voltage comparing element's output with level shift unit's input is connected, level shift unit's output with first buffer circuit connects.
Further, the two-way current-to-voltage conversion unit comprises resistors R3, R4, R5, resistors R9, R10, R11, capacitors C2, C3, capacitors C5, C6, diodes D2 and D4, wherein the resistors R4, the diodes D2 and the capacitors C2 are connected in parallel, one end of each resistor R3 is connected, and the other end of each resistor R is grounded; the other end of the resistor R3 is connected with one end of the resistor R5 which is connected with the capacitor C3 in parallel, and the other ends of the resistor R5 and the capacitor C3 are grounded; the resistor R10, the diode D4 and the capacitor C5 are connected in parallel, one end of the resistor R9 is connected with one end of the capacitor C, and the other end of the resistor R9 is grounded; the other end of the resistor R9 is connected with one end of the resistor R11 connected with the capacitor C6 in parallel, and the other ends of the resistor R11 and the capacitor C6 are grounded.
Furthermore, the reference voltage unit comprises voltage dividing resistors R1 and R2 and a filter capacitor C1, the voltage dividing resistors R1 and R2 are connected in series, the other end of the voltage dividing resistor R2 is grounded, one end of the filter capacitor C1 is connected with the common end of the voltage dividing resistors R1 and R2, and the other end of the filter capacitor C1 is grounded; the two-way voltage comparison unit comprises comparators U1B and U4B and diodes D1 and D3 connected with the comparators U1B and U4B respectively.
Furthermore, the voltage detection circuit comprises a first voltage detection unit connected with the alternating current power supply and a second voltage detection unit connected with the output end of the bidirectional interleaving voltage-boosting and stabilizing circuit.
Further, the first voltage detection unit includes current-limiting resistors R12, R14, R18, a rectifier diode D5, D6, and D7, voltage-dividing resistors R15, R19, a dc bias resistor R13, a filter capacitor C8, and a PWM conversion chip U5, the current-limiting resistors R12, R14, and R18 are respectively connected in series with the rectifier diodes D5, D6, and D7 and then connected with one end of the voltage-dividing resistor R15, the other end of the voltage-dividing resistor R15 is connected with a common end of the voltage-dividing resistor R19, the dc bias resistor R13, the filter capacitor C8, and the PWM conversion chip U5, the other ends of the voltage-dividing resistor R19 and the filter capacitor C8 are grounded, and the PWM conversion chip U5 outputs a PWM signal to the second isolation circuit.
Furthermore, the second voltage detection unit includes a voltage dividing resistor R23, a voltage dividing resistor R26, a dc offset resistor R22, a filter capacitor C11, and a PWM conversion chip U7, the voltage dividing resistor R23 is connected to the common terminals of the voltage dividing resistor R26, the dc offset resistor R22, the filter capacitor C11, and the PWM conversion chip U7, the other terminals of the voltage dividing resistor R22 and the filter capacitor C11 are grounded, and the PWM conversion chip U7 outputs a PWM signal to the second isolation circuit.
The utility model also provides a coating film power, include input stage circuit signal monitoring circuit.
The utility model provides an input stage circuit signal monitoring circuit and coating film power have the signal isolation function through voltage detection circuit, double-circuit current detection circuit, first buffer circuit, second buffer circuit and control circuit, can monitor the electric current and the voltage signal of input stage circuit, improve product reliability.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an input stage circuit signal monitoring circuit provided by the present invention;
FIG. 2 is a schematic circuit diagram of an AC power supply and a bidirectional interleaved boost voltage regulator circuit;
FIG. 3 is a functional block diagram of a two-way current sensing circuit;
FIG. 4 is a circuit schematic of a voltage detection circuit, a two-way current detection circuit, a first isolation circuit, a second isolation circuit, and a control circuit.
Reference numerals:
100-alternating current power supply, 200-bidirectional staggered voltage boosting and stabilizing circuit, 300-voltage detection circuit, 400-two-way current detection circuit, 410-two-way current voltage conversion unit, 420-reference voltage unit, 430-two-way voltage comparison unit, 440-level conversion unit, 500-first isolation circuit, 600-second isolation circuit and 700-control circuit.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides an input stage circuit signal monitoring circuit, including alternating current power supply 100, two-way crisscross voltage stabilizing circuit 200 that steps up, voltage detection circuit 300, double-circuit current detection circuit 400, first isolating circuit 500, second isolating circuit 600 and control circuit 700, alternating current power supply 100 with two-way crisscross voltage stabilizing circuit 200 that steps up connects, voltage detection circuit 300's input respectively with alternating current power supply 100 with two-way crisscross voltage stabilizing circuit 200 that steps up's output is connected, its output with second isolating circuit 600 is connected, double-circuit current detection circuit 400's input with two-way crisscross voltage stabilizing circuit 200 that steps up connects, its output with first isolating circuit 500 connects, first isolating circuit 500 with second isolating circuit 600 all with control circuit 700 connects.
Fig. 2 is a schematic circuit diagram of an ac power supply 100 and a bidirectional interleaved boost voltage stabilizing circuit 200, wherein the ac power supply 100 is a three-phase ac power supply 100. The sampling points include the three-phase input voltage Vac _3ph, the current sample CS1, the current sample CS2, and the output voltage sample Vdc.
Fig. 3 is a schematic block diagram of a two-way current detection circuit 400, referring to fig. 3, the two-way current detection circuit 400 includes a two-way current-to-voltage conversion unit 410, a reference voltage unit 420, a two-way voltage comparison unit 430, and a level conversion unit 440, the two-way current-to-voltage conversion unit 410 and the reference voltage unit 420 are respectively connected to an input terminal of the two-way voltage comparison unit 430, an output terminal of the two-way voltage comparison unit 430 is connected to an input terminal of the level conversion unit 440, and an output terminal of the level conversion unit is connected to the first isolation circuit 500.
As shown in fig. 4, the two-way current-to-voltage conversion unit 410 includes resistors R3, R4, R5, resistors R9, R10, R11, capacitors C2, C3, capacitors C5, C6, diodes D2, D4, wherein the resistors R4, the diodes D2, and the capacitors C2 are connected in parallel, one end of each resistor R3 is connected, and the other end of each resistor R is grounded; the other end of the resistor R3 is connected with one end of the resistor R5 which is connected with the capacitor C3 in parallel, and the other ends of the resistor R5 and the capacitor C3 are grounded; the resistor R10, the diode D4 and the capacitor C5 are connected in parallel, one end of the resistor R9 is connected with one end of the capacitor, and the other end of the resistor R9 is grounded; the other end of the resistor R9 is connected with one end of the resistor R11 connected with the capacitor C6 in parallel, and the other ends of the resistor R11 and the capacitor C6 are grounded.
The reference voltage unit 420 comprises voltage dividing resistors R1 and R2 and a filter capacitor C1, wherein the voltage dividing resistors R1 and R2 are connected in series, the other end of the voltage dividing resistor R2 is grounded, one end of the filter capacitor C1 is connected with the common end of the voltage dividing resistors R1 and R2, and the other end of the filter capacitor C1 is grounded; the two-way voltage comparing unit 430 includes comparators U1B, U4B and diodes D1, D3 connected to the comparators U1B, U4B, respectively.
The first isolation circuit 500 includes a chip U3, and the second isolation circuit 600 includes a chip U6.
The current signals CS1 and CS2 are converted into voltage through R4 and R10, and are subjected to amplitude limiting through D2 and D4, so that the amplitude of the power signals is prevented from exceeding the bearing range of the U1B and U4B chips. The voltage signal converted by R4 is subjected to voltage division filtering by R3, R5 and C3, the voltage signal converted by R10 is subjected to voltage division filtering by R9, R11 and C6, the voltage signal is compared with the signal of VCC subjected to voltage division filtering by R1, R2 and C1 through U1B and U4B, and the signals of U1B and U4B are subjected to OR operation by D1 and D3. The U2 is a level conversion chip, after the signal level after D1 and D3 or operation is converted to the bearing range of the U3 chip, the U3 isolates the input signal and sends it to the control circuit 700, and the control circuit 700 detects the OCFLAG signal and then controls the power output. Assuming that the 4-pin signal voltage of U1B is less than the 3-pin signal voltage of U1B, the over-current phenomenon occurs in CS1, otherwise, the over-current phenomenon does not occur; similarly, if the 4-pin signal voltage of U4B is less than the 3-pin signal voltage of U4B, the CS2 has an overcurrent phenomenon, otherwise, the overcurrent phenomenon does not occur.
The voltage detection circuit 300 comprises a first voltage detection unit connected with the alternating current power supply 100 and a second voltage detection unit connected with the output end of the bidirectional interleaving voltage-boosting stabilizing circuit 200. The first voltage detection unit comprises current-limiting resistors R12, R14, R18, rectifier diodes D5, D6 and D7, voltage-dividing resistors R15, R19, a direct-current bias resistor R13, a filter capacitor C8 and a PWM conversion chip U5, the current-limiting resistors R12, R14 and R18 are respectively connected with one end of the voltage-dividing resistor R15 after being connected with the rectifier diodes D5, D6 and D7 in series, the other end of the voltage-dividing resistor R15 is connected with a common end of the voltage-dividing resistor R19, the direct-current bias resistor R13, the filter capacitor C8 and the PWM conversion chip U5, the other ends of the voltage-dividing resistor R19 and the filter capacitor C8 are grounded, and the PWM conversion chip U5 outputs PWM signals to the second isolation circuit 600.
After the Vac _3ph three-phase alternating current signal is subjected to current limiting through R12, R14 and R18, the alternating current signal is rectified through D5, D6 and D7, then voltage division is carried out through R15 and R19, the R13 provides direct current bias voltage, C8 plays a role in filtering, and U5 can convert the signal at two ends of C8 into a PWM signal, wherein the frequency of the PWM signal is in a proportional relation with the voltage at two ends of C5. The PWM signal is isolated and transmitted to the control circuit 700 through the U6 chip, the control circuit 700 converts the PWM frequency into voltage by capturing the PWM signal, and the control circuit 700 turns off the power output when under-voltage or over-voltage.
The second voltage detection unit comprises voltage division resistors R23 and R26, a direct current bias resistor R22, a filter capacitor C11 and a PWM conversion chip U7, wherein the voltage division resistor R23 is connected with the common end of the voltage division resistor R26, the direct current bias resistor R22, the filter capacitor C11 and the PWM conversion chip U7, the other ends of the voltage division resistor R22 and the filter capacitor C11 are grounded, and the PWM conversion chip U7 outputs a PWM signal to the second isolation circuit 600.
Vdc dc voltage is then divided by R23, R26, R22 provides dc bias voltage, C11 acts as a filter, and U7 can convert the signal across C11 into a PWM signal with a frequency proportional to the voltage across C11. The PWM signal is isolated and transmitted to the control circuit 700 through the U6 chip, the control circuit 700 converts the PWM frequency into voltage by capturing the PWM signal, and the control circuit 700 turns off the power output when under-voltage or over-voltage.
The utility model also provides a coating film power, include input stage circuit signal monitoring circuit.
The utility model provides an input stage circuit signal monitoring circuit and coating film power have the signal isolation function through voltage detection circuit 300, double-circuit current detection circuit 400, first isolating circuit 500, second isolating circuit 600 and control circuit 700, can monitor input stage circuit's electric current and voltage signal, improve product reliability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides an input stage circuit signal monitoring circuit, its characterized in that, includes alternating current power supply, two-way crisscross step-up voltage stabilizing circuit, voltage detection circuitry, double-circuit current detection circuitry, first buffer circuit, second buffer circuit and control circuit, alternating current power supply with two-way crisscross step-up voltage stabilizing circuit connects, voltage detection circuitry's input respectively with alternating current power supply with two-way crisscross step-up voltage stabilizing circuit's output is connected, its output with the second buffer circuit is connected, two-way current detection circuitry's input with two-way crisscross step-up voltage stabilizing circuit is connected, its output with first buffer circuit is connected, first buffer circuit with second buffer circuit all with control circuit connects.
2. The input stage circuit signal monitoring circuit of claim 1, wherein the ac power source is a three-phase ac power source.
3. The input stage circuit signal monitoring circuit according to claim 1, wherein the two-way current detection circuit comprises a two-way current to voltage conversion unit, a reference voltage unit, a two-way voltage comparison unit and a level conversion unit, the two-way current to voltage conversion unit and the reference voltage unit are respectively connected to an input terminal of the two-way voltage comparison unit, an output terminal of the two-way voltage comparison unit is connected to an input terminal of the level conversion unit, and an output terminal of the level conversion unit is connected to the first isolation circuit.
4. The input stage circuit signal monitoring circuit of claim 3, wherein the two-way current-to-voltage unit comprises resistors R3, R4, R5, resistors R9, R10, R11, capacitors C2, C3, capacitors C5, C6, diodes D2 and D4, the resistors R4, the diodes D2 and the capacitors C2 are connected in parallel, one end of each of the resistors R3 is connected with one end of the corresponding one of the capacitors, and the other end of each of the resistors is connected with the ground; the other end of the resistor R3 is connected with one end of the resistor R5 which is connected with the capacitor C3 in parallel, and the other ends of the resistor R5 and the capacitor C3 are grounded; the resistor R10, the diode D4 and the capacitor C5 are connected in parallel, one end of the resistor R9 is connected with one end of the capacitor, and the other end of the resistor R9 is grounded; the other end of the resistor R9 is connected with one end of the resistor R11 connected with the capacitor C6 in parallel, and the other ends of the resistor R11 and the capacitor C6 are grounded.
5. The input stage circuit signal monitoring circuit of claim 3, wherein the reference voltage unit comprises voltage dividing resistors R1 and R2 and a filter capacitor C1, the voltage dividing resistors R1 and R2 are connected in series, the other end of the voltage dividing resistor R2 is grounded, one end of the filter capacitor C1 is connected with a common terminal of the voltage dividing resistors R1 and R2, and the other end of the filter capacitor C1 is grounded; the two-way voltage comparison unit comprises comparators U1B and U4B and diodes D1 and D3 connected with the comparators U1B and U4B respectively.
6. The input stage circuit signal monitoring circuit of claim 1, wherein the voltage detection circuit comprises a first voltage detection unit for connecting with the ac power source and a second voltage detection unit for connecting with an output terminal of the bidirectional interleaved boost voltage regulator circuit.
7. The input stage circuit signal monitoring circuit of claim 6, wherein the first voltage detection unit comprises current limiting resistors R12, R14, R18, rectifier diodes D5, D6, and D7, voltage dividing resistors R15, R19, a dc bias resistor R13, a filter capacitor C8, and a PWM conversion chip U5, the current limiting resistors R12, R14, and R18 are respectively connected in series with the rectifier diodes D5, D6, and D7 and then connected to one end of the voltage dividing resistor R15, the other end of the voltage dividing resistor R15 is connected to a common terminal of the voltage dividing resistor R19, the dc bias resistor R13, the filter capacitor C8, and the PWM conversion chip U5, the voltage dividing resistor R19 and the filter capacitor C8 are grounded, and the PWM conversion chip U5 outputs the PWM signal to the second isolation circuit.
8. The input stage circuit signal monitoring circuit of claim 6, wherein the second voltage detection unit comprises voltage dividing resistors R23, R26, a DC offset resistor R22, a filter capacitor C11 and a PWM conversion chip U7, the voltage dividing resistor R23 is connected with a common terminal of the voltage dividing resistor R26, the DC offset resistor R22, the filter capacitor C11 and the PWM conversion chip U7, the other terminals of the voltage dividing resistor R22 and the filter capacitor C11 are grounded, and the PWM conversion chip U7 outputs the PWM signal to the second isolation circuit.
9. A coated power supply comprising the input stage circuit signal monitoring circuit of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220655295.6U CN217305311U (en) | 2022-03-24 | 2022-03-24 | Input stage circuit signal monitoring circuit and coating film power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220655295.6U CN217305311U (en) | 2022-03-24 | 2022-03-24 | Input stage circuit signal monitoring circuit and coating film power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217305311U true CN217305311U (en) | 2022-08-26 |
Family
ID=82935946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220655295.6U Active CN217305311U (en) | 2022-03-24 | 2022-03-24 | Input stage circuit signal monitoring circuit and coating film power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217305311U (en) |
-
2022
- 2022-03-24 CN CN202220655295.6U patent/CN217305311U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215728707U (en) | Three-phase power supply phase loss detection circuit and motor controller of BLDC motor | |
| CN211508931U (en) | Power supply identification conversion circuit and air conditioner | |
| CN217305311U (en) | Input stage circuit signal monitoring circuit and coating film power supply | |
| CN105391320B (en) | Polyphase source circuit | |
| CN209296806U (en) | A kind of isolated ac voltage detection circuit | |
| CN210007482U (en) | interphase power taking device capable of avoiding influence of single-phase earth fault | |
| CN102769271B (en) | A kind of AC power output protection circuit | |
| CN1153307A (en) | Under-voltage timing method and under-voltage timing device thereby | |
| CN211827556U (en) | Internet of things data acquisition system | |
| CN208445485U (en) | A kind of super high power sine wave ultrasonic power | |
| CN215005794U (en) | Power failure monitoring circuit | |
| CN107086798B (en) | Switching power supply circuit | |
| CN211123198U (en) | High-voltage direct-current power supply running state detection circuit | |
| CN110299854A (en) | A kind of elevator control system stabilized supply apparatus | |
| CN217984860U (en) | High-precision direct-current signal output circuit | |
| CN219643659U (en) | AC/DC hybrid micro-grid coordinated power supply monitoring circuit of intelligent building system | |
| CN212569521U (en) | Low-pressure vacuum comprehensive protector based on PLC | |
| CN112269056B (en) | Hardware frequency measurement circuit of high-voltage variable-frequency relay protection device | |
| CN214176906U (en) | Little electric wire netting based on active power regulator of back to back | |
| CN213879664U (en) | Power supply circuit and power supply equipment | |
| CN213658855U (en) | Three-phase alternating current phase-loss and phase-failure detection circuit and compressor | |
| CN212163164U (en) | Special switching power supply for high-voltage power line capacitance power taking | |
| CN221007732U (en) | Current intelligent detector | |
| CN214674318U (en) | Vehicle-mounted power supply overcurrent protection restarting circuit | |
| CN218298370U (en) | Power failure detection circuit and AC-DC power module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |