CN220628946U - Low-cost PC-level dual-power automatic transfer switch control circuit - Google Patents
Low-cost PC-level dual-power automatic transfer switch control circuit Download PDFInfo
- Publication number
- CN220628946U CN220628946U CN202321987427.6U CN202321987427U CN220628946U CN 220628946 U CN220628946 U CN 220628946U CN 202321987427 U CN202321987427 U CN 202321987427U CN 220628946 U CN220628946 U CN 220628946U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- power supply
- resistance
- control 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
- 239000003990 capacitor Substances 0.000 claims abstract description 55
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 15
- 230000007935 neutral effect Effects 0.000 claims description 18
- 230000009977 dual effect Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001629 suppression Effects 0.000 claims description 9
- 230000001052 transient effect Effects 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a low-cost PC-level dual-power automatic change-over switch control circuit, which comprises a control power circuit, wherein any one of common power supplies is matched with a zero line to form the input voltage of the control power circuit, the control power circuit comprises a resistance-capacitance voltage reduction unit, a rectifying unit and a voltage stabilizing unit, the input voltage flows through the resistance-capacitance voltage reduction unit, the rectifying unit and the voltage stabilizing unit to form a first voltage, the resistance-capacitance voltage reduction unit comprises at least two patch high-voltage capacitors, and the patch high-voltage capacitors are connected in parallel; the utility model has small volume and low cost.
Description
Technical Field
The utility model particularly relates to a low-cost PC-level dual-power automatic transfer switch control circuit.
Background
According to the new requirements of the new version standard GB14048.11-2016 low-voltage switch equipment and the control equipment 6-1 multifunctional electric appliance switch appliance, the basic dual-power controller must have the functions of detecting the common open-phase and the voltage loss, and can only detect the voltage loss for standby. In order to solve the above problems, the prior art mainly gives the following solutions: in the control power supply part, there are a transformer step-down mode and a resistance-capacitance step-down mode. The defects are that: the transformer is large in volume and high in cost in a transformer step-down mode, the plug-in is large in capacitance in a resistance-capacitance step-down mode, the large capacitance is large in volume, the size of the PCB is greatly increased, the space occupation rate of the whole PCB is increased, and the cost of the whole circuit is increased.
Disclosure of Invention
The utility model mainly solves the technical problem of providing a low-cost PC-level dual-power automatic transfer switch control circuit.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a low-cost PC level dual supply automatic transfer switch control circuit, wherein, including control power supply circuit, arbitrary phase in the common power supply forms control power supply circuit's input voltage with the zero line cooperation, and control power supply circuit includes resistance-capacitance step-down unit, rectifier unit, steady voltage unit, and input voltage flows through resistance-capacitance step-down unit, rectifier unit, steady voltage unit and forms first voltage, and resistance-capacitance step-down unit includes two at least paster high voltage capacitor, is parallel connection between the paster high voltage capacitor.
The setting of paster high voltage capacitor is adopted, and the size of paster high voltage capacitor is far less than conventional big electric capacity to make the size of PCB board reduce, and reduce PCB's space occupancy, secondly, connect in parallel through a plurality of paster high voltage capacitor, increase the excessive current, satisfy the normal work of circuit. And the cost of the patch high-voltage capacitor and the reduction of the size of the PCB realize the effect of reducing the cost.
The resistance-capacitance voltage reduction unit comprises a first discharge resistor which is connected with the patch high-voltage capacitor in parallel.
And the first discharging resistor is used for discharging the patch high-voltage capacitor.
The resistance-capacitance voltage reduction unit also comprises a current limiting module, wherein the current limiting module comprises a plurality of resistors, and the resistors are connected in series or in parallel.
The current limiting module is arranged, so that the overflow rate can be increased, and the creepage distance of the element is increased.
The voltage stabilizing unit comprises a transient suppression diode, a plurality of capacitors connected in parallel and a second discharge resistor connected in parallel with the capacitors, wherein one end of the second discharge resistor is connected with the first voltage.
The voltage stabilizing unit forms voltage clamping through the transient suppression diode to play a role in stabilizing voltage, and the second discharging resistor is a dummy load and is used for discharging the capacitor.
The power supply detection circuit detects three-phase power of a common power supply, the relay trigger circuit comprises a relay for controlling power supply switching, and the photoelectric coupler is connected with the power supply detection circuit and the relay trigger circuit.
The isolation control effect between the two circuits is formed by the photoelectric coupler.
The power supply detection circuit comprises three groups of resistance voltage reduction units, each group of resistance voltage reduction units is correspondingly connected with one phase of electricity, the other ends of the three groups of resistance voltage reduction units are connected to form a neutral point, and the neutral point is electrically connected with the photoelectric coupler.
The arrangement of the neutral point, when the common power supply is normal, the voltage of the neutral point is zero, so that the photoelectric coupler does not act, when the phase loss or the voltage loss occurs, the three phases are unbalanced, the neutral point can generate a voltage signal, and the relay trigger circuit is driven to act by controlling the photoelectric coupler to act, so that the switching effect between the common power supply and the standby power supply is realized.
The neutral point is electrically connected with the photoelectric coupler through the signal rectifying and filtering circuit.
And the voltage signal is filtered and rectified through the signal rectifying and filtering circuit, so that the false triggering action of the fluctuation of the power grid is prevented.
The relay trigger circuit comprises a switch unit, and the switch unit comprises a triode or a field effect tube.
The control effect of the relay is realized through the switch unit.
The relay further comprises a resistance-capacitance absorption circuit, at least two paths of conversion contacts are arranged on the relay, and the conversion contacts are connected with the resistance-capacitance absorption circuit.
The resistance-capacitance absorption circuit is used for absorbing high-voltage arc discharge generated during switching of the switching contact of the relay, so that normal switching of the circuit is ensured.
The power supply also comprises an indicating circuit, wherein the indicating circuit is connected with a common power supply and a standby power supply.
Through the indicating circuit, an operator can quickly know whether the circuit is normal or not, and an indicating effect is achieved.
Drawings
FIG. 1 is a schematic diagram of embodiment 1 of the present utility model;
FIG. 2 is a schematic block diagram of embodiment 1 of the present utility model;
fig. 3 is a partial schematic diagram of embodiment 2 of the present utility model.
Detailed Description
Example 1:
referring to fig. 1-2, a low-cost PC-level dual-power automatic transfer switch control circuit includes a control power circuit, a power detection circuit, a signal rectification filter circuit, a relay trigger circuit, a photoelectric coupler, an indication circuit and a resistance-capacitance absorption circuit.
It should be noted that, in the present embodiment, the dual-power automatic switching switch is provided with a common power source and a standby power source, and the automatic switching can be realized by a motor, or can be manually switched, and the specific switching structure is the prior art, so that the description is omitted in the present embodiment. It should be noted that, the common power source and the standby power source are both three-phase power.
The input voltage of the control power circuit is formed by matching any phase in the common power supply with the zero line, and in this embodiment, only the A1 phase line and the zero line N1 in the common power supply are taken as an example.
The control power supply circuit comprises a resistance-capacitance voltage reduction unit, a rectifying unit and a voltage stabilizing unit, wherein the phase line A1 forms a first voltage through the resistance-capacitance voltage reduction unit, the rectifying unit and the voltage stabilizing unit, and the voltage is used for supplying power to the relay trigger circuit.
The resistance-capacitance voltage reduction unit comprises a protection element, a current limiting module, at least two patch high-voltage capacitors and a first discharge resistor. The protection component is a piezoresistor VR1, one end of the piezoresistor VR1 is electrically connected with the A1 phase line, and the other end of the piezoresistor VR1 is electrically connected with the zero line N1. The current limiting module comprises a plurality of resistors which are connected in series or in parallel. In this embodiment, the limiting module includes four resistors R11, R12, R13, and R14, the resistor R11 is connected in series with the resistor R13, the resistor R12 is connected in series with the resistor R14, the resistor R11 is connected in parallel with the resistor R12, the resistor R13 is connected in parallel with the resistor R14, one end of the resistor R11 connected in parallel with the resistor R12 is electrically connected with the A1 phase line, the other end of the resistor R11 connected in parallel with the resistor R12 is electrically connected with one end of the resistor R13 connected in parallel with the resistor R14, and the other end of the resistor R13 connected in parallel with the resistor R14 is connected with the patch high voltage capacitor. The current limiting module is arranged, so that the overflow rate can be increased, and the creepage distance of the element is increased.
The number of the patch high-voltage capacitors is two, the patch high-voltage capacitors comprise a patch high-voltage capacitor C15 and a patch high-voltage capacitor C16, the two patch high-voltage capacitors are connected in parallel, and the first discharging resistor R15 is connected with the patch high-voltage capacitor in parallel. The first discharging resistor R15 is used for discharging the patch high-voltage capacitor. One end of the three parallel connected resistors is electrically connected with the other end of the resistor R13 and the resistor R14 which are parallel connected, and the other end of the three parallel connected resistors is electrically connected with the rectifying unit.
The rectifying unit is electric including rectifier bridge U2, and rectifier bridge U2's No. 4 foot and paster high voltage capacitor C15's the other end electrical connection, rectifier bridge U2's No. 2 foot and zero line N1 electrical connection, rectifier bridge U2's No. 3 foot ground connection, rectifier bridge U2's No. 1 foot is connected with voltage stabilizing unit.
The voltage stabilizing unit comprises a transient suppression diode D2, a plurality of capacitors which are connected in parallel and a second discharge resistor R21 which is connected in parallel with the capacitors, wherein the number of the capacitors is four, and the transient suppression diode D2, the capacitors C10, the capacitors C14 and the capacitors C6 are included. C12, the capacitor C10, the capacitor C14, the capacitor C6, the second discharging resistor R21 and the reverse transient suppression diode D2 are arranged in parallel, one end of the parallel transient suppression diode D is electrically connected with the No. 1 pin of the rectifier bridge U2, and the other end of the parallel transient suppression diode D is grounded. Here, the ungrounded end of the second discharging resistor R21 forms a first voltage VCC. The voltage stabilizing unit forms voltage clamping through the transient suppression diode to play a role in stabilizing voltage, and the second discharging resistor is a dummy load and is used for discharging the capacitor. Through the capacitor, the filtering effect is achieved.
The power supply detection circuit detects three-phase power of a common power supply.
The power supply detection circuit comprises three groups of resistor step-down units, each group of resistor step-down units is formed by two resistors connected in series, in the embodiment, an A1 phase line is electrically connected with a neutral point through a resistor R3 and a resistor R6, a B1 phase line is electrically connected with the neutral point through a resistor R2 and a resistor R5, and a C1 phase line is electrically connected with the neutral point through a resistor R1 and a resistor R4. The arrangement of the neutral point, when the common power supply is normal, the voltage of the neutral point is zero, so that the photoelectric coupler does not act, when the phase loss or the voltage loss occurs, the three phases are unbalanced, the neutral point can generate a voltage signal, and the relay trigger circuit is driven to act by controlling the photoelectric coupler to act, so that the switching effect between the common power supply and the standby power supply is realized. The A1 phase line, the B1 phase line and the C1 phase line form a Y-shaped circuit through a resistor voltage reduction unit, and control signals are output through the differential pressure of three-phase network voltage, and the control signals are neutral point voltages.
One end of the signal rectifying and filtering circuit is connected with the neutral point, and the other end of the signal rectifying and filtering circuit is electrically connected with the photoelectric coupler. And the voltage signal is filtered and rectified through the signal rectifying and filtering circuit, so that the false triggering action of the fluctuation of the power grid is prevented.
In this embodiment, the signal rectifying and filtering circuit includes a diode VD1, a resistor R10, a capacitor C7, a resistor R9, a capacitor C8, and a capacitor C13. The positive electrode of the diode VD1 is connected to the neutral point, and the other end thereof is electrically connected to one end of the resistor R10. The capacitor C7, the resistor R9, the capacitor C8 and the capacitor C13 are arranged in parallel, one end of the parallel connection is respectively and electrically connected with the other end of the resistor R10 and one end of the photoelectric coupler, and the other end of the parallel connection is electrically connected with the zero line N1.
The control end of the photoelectric coupler U1 is electrically connected with the signal rectifying and filtering circuit and the zero line N1, and the output end of the photoelectric coupler U1 is electrically connected with the relay trigger circuit.
The relay trigger circuit includes a switching unit and a relay K1.
The switch unit can be a triode or a field effect transistor. In the present embodiment, the transistor Q1 is taken as an example only. One end of the output end of the photoelectric coupler U1 is electrically connected with the base electrode of the triode Q1, and the other end of the output end of the photoelectric coupler U1 is grounded.
The first voltage VCC is grounded through a resistor R19 and a resistor R18, and the junction of the resistor R19 and the resistor R18 is electrically connected with the base of the triode Q1.
The emitter of transistor Q1 is grounded.
The collector of the triode Q1 is electrically connected with one end of a resistor R20 and the control end of a relay K1 respectively. The other end of resistor R20 is grounded. The first voltage VCC is electrically connected with the other end of the control end of the relay K1 to form the control work effect.
The relay K1 is used for switching between a common power supply and a standby power supply, namely, after the relay K1 is opened, the motor is controlled to move, so that a switching effect is achieved.
The normally open contact and the normally closed contact of the switching contact of the relay K1 are correspondingly connected with a common power supply and a standby power supply, and the common end is connected with a motor through a load power supply circuit, the relay K1 comprises 3 paths of switching contacts, among the 3 paths of switching contacts, the normally closed contact and the normally open contact of the 1 st path of switching contact are correspondingly connected with a zero line of the standby power supply and a zero line of the common power supply, the normally closed contact and the normally open contact of the 2 nd path of switching contact are respectively empty and connected with an A phase line of the common power supply, the normally closed contact and the normally open contact of the 3 rd path of switching contact are respectively connected with a C phase line and empty of the standby power supply, and the load power supply circuit comprises 3 paths of connecting circuits respectively connected with the common end of the 3 paths of switching contacts.
And a resistance-capacitance absorption circuit is connected between the 2 nd circuit connected with the 2 nd circuit and the 3 rd circuit switching contact and the connection circuit connected with the 1 st circuit switching contact and is used for absorbing high-voltage arc discharge generated during switching of the switching contact of the relay K1, and the resistance-capacitance absorption circuit comprises resistors R7, R8, R16 and R17 and nonpolar capacitors C1, C2, C3, C4, C5 and C6.
The load is a motor, the motor can rotate positively and negatively, a connection circuit between the public end of the 1 st path of conversion contact and the motor is connected with 1 automatic/manual switch S1/S2 in series, when the automatic/manual switch is switched on, a zero line of the motor is switched on with a control zero line, and the motor can rotate positively and negatively to automatically drive the mechanism to convert; when the automatic/manual switch is disconnected, the zero line of the motor is disconnected from the control zero line, and the motor cannot be powered, so that the motor can be switched manually only.
The indication circuit is connected with a common power supply and a standby power supply. Through the indicating circuit, an operator can quickly know whether the circuit is normal or not, and an indicating effect is achieved. In this embodiment, the common incoming call indication takes K1B as input, and the standby incoming call indication takes K2B as input. The power supply source indicating circuit of the common power supply comprises a rectifying diode VD7, a resistor R23, a zener diode D9 and a light emitting diode 1 which are sequentially connected in series, wherein the resistor R23 is used for reducing voltage and limiting current. The power supply source indicating circuit of the standby power supply comprises a rectifying diode VD8, a resistor R24, a diode D10 and a light emitting diode 2 which are sequentially connected in series. When the switch is switched to the normal or standby position, the corresponding indicating light emitting diode lamp is lighted. .
The setting of paster high voltage capacitor is adopted, and the size of paster high voltage capacitor is far less than conventional big electric capacity to make the size of PCB board reduce, and reduce PCB's space occupancy, secondly, connect in parallel through a plurality of paster high voltage capacitor, increase the excessive current, satisfy the normal work of circuit. And the cost of the patch high-voltage capacitor and the reduction of the size of the PCB realize the effect of reducing the cost.
Example 2:
referring to fig. 3, the difference between embodiment 2 and embodiment 1 is that in this embodiment, the number of patch high-voltage capacitors is different and the components of the switching unit are different. In this embodiment, the number of the patch high-voltage capacitors is four, and the four patch high-voltage capacitors are connected in parallel, so that the overcurrent is further improved, the heat dissipation area is increased, and the reliability of the patch high-voltage capacitors in a circuit is improved.
In this embodiment, the switching unit adopts the field effect transistor Q1, the first voltage VCC is grounded through the resistor R19 and the resistor R21, the junction between the resistor R19 and the resistor R21 is electrically connected with the G pole of the field effect transistor Q1 through the resistor R11, the G pole of the field effect transistor Q1 is also grounded through the resistor R13, the S pole of the field effect transistor Q1 is grounded, and the D pole of the field effect transistor Q1 is electrically connected with the control end of the relay K1.
In addition, in this embodiment, the number of filter capacitors in the voltage stabilizing unit and the signal rectifying and filtering circuit is adjusted.
Claims (10)
1. A low-cost PC-level dual-power automatic switching control circuit is characterized in that: the power supply circuit comprises a control power supply circuit, wherein any one of common power supplies is matched with a zero line to form the input voltage of the control power supply circuit, the control power supply circuit comprises a resistance-capacitance voltage reduction unit, a rectifying unit and a voltage stabilizing unit, the input voltage flows through the resistance-capacitance voltage reduction unit, the rectifying unit and the voltage stabilizing unit to form first voltage, the resistance-capacitance voltage reduction unit comprises at least two patch high-voltage capacitors, and the patch high-voltage capacitors are connected in parallel.
2. A low cost PC stage dual power automatic switching control circuit as defined in claim 1 wherein: the resistance-capacitance voltage reduction unit comprises a first discharge resistor which is connected with the patch high-voltage capacitor in parallel.
3. A low cost PC stage dual power automatic switching control circuit as defined in claim 1 wherein: the resistance-capacitance voltage reduction unit also comprises a current limiting module, wherein the current limiting module comprises a plurality of resistors, and the resistors are connected in series or in parallel.
4. A low cost PC stage dual power automatic switching control circuit as defined in claim 1 wherein: the voltage stabilizing unit comprises a transient suppression diode, a plurality of capacitors connected in parallel and a second discharge resistor connected in parallel with the capacitors, and one end of the second discharge resistor is connected with the first voltage.
5. A low cost PC stage dual power automatic switching control circuit as defined in claim 1 wherein: the power supply detection circuit detects three-phase power of a common power supply, the relay trigger circuit comprises a relay for controlling power supply switching, and the photoelectric coupler is connected with the power supply detection circuit and the relay trigger circuit.
6. The low cost PC stage dual power automatic switching control circuit as set forth in claim 5 wherein: the power supply detection circuit comprises three groups of resistance voltage reduction units, each group of resistance voltage reduction units is correspondingly connected with one phase of electricity, the other ends of the three groups of resistance voltage reduction units are connected to form a neutral point, and the neutral point is electrically connected with the photoelectric coupler.
7. The low cost PC stage dual power automatic switching control circuit as set forth in claim 6 wherein: the neutral point is electrically connected with the photoelectric coupler through the signal rectifying and filtering circuit.
8. The low cost PC stage dual power automatic switching control circuit as set forth in claim 5 wherein: the relay trigger circuit comprises a switch unit, and the switch unit comprises a triode or a field effect transistor.
9. The low cost PC stage dual power automatic switching control circuit as set forth in claim 5 wherein: the relay also comprises a resistance-capacitance absorption circuit, wherein at least two paths of conversion contacts are arranged on the relay, and the conversion contacts are connected with the resistance-capacitance absorption circuit.
10. A low cost PC stage dual power automatic switching control circuit as defined in claim 1 wherein: the power supply also comprises an indication circuit which is connected with the common power supply and the standby power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321987427.6U CN220628946U (en) | 2023-07-26 | 2023-07-26 | Low-cost PC-level dual-power automatic transfer switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321987427.6U CN220628946U (en) | 2023-07-26 | 2023-07-26 | Low-cost PC-level dual-power automatic transfer switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220628946U true CN220628946U (en) | 2024-03-19 |
Family
ID=90216796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321987427.6U Active CN220628946U (en) | 2023-07-26 | 2023-07-26 | Low-cost PC-level dual-power automatic transfer switch control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220628946U (en) |
-
2023
- 2023-07-26 CN CN202321987427.6U patent/CN220628946U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108110728A (en) | Protection switch | |
| CN220628946U (en) | Low-cost PC-level dual-power automatic transfer switch control circuit | |
| CN207283541U (en) | A kind of current loop communication circuit | |
| CN204089158U (en) | A kind of novel shunt opening and device for under-voltage releasing equipment control circuit | |
| CN207265666U (en) | The box-like power capacitor of multiloop mixed compensation type smart group | |
| CN205610197U (en) | A photoelectric coupling module that is used for circuit breaker and has interchange overvoltage detection module | |
| CN209748250U (en) | Intelligent energy storage power supply purifier | |
| CN109617010B (en) | Over-voltage and under-voltage protection device and control method thereof | |
| CN2506011Y (en) | Three phase AC power source phase sequence automatic monitoring device | |
| CN220510760U (en) | Automatic change-over switch protection control circuit | |
| CN109510490A (en) | A kind of Multi-function ac/dc power-supply system | |
| CN211127286U (en) | Simple PC-level dual-power-supply switching switch control circuit | |
| CN217332739U (en) | Relay contact state detection circuit | |
| CN212210966U (en) | Electronic switch circuit and electronic device applying same | |
| CN208738839U (en) | A kind of novel reverse connection prevention protection circuit | |
| CN218569891U (en) | Auxiliary power supply switching circuit, switching device and charging pile | |
| CN215772959U (en) | High-low voltage automatic switching circuit of isolation transformer | |
| CN207530731U (en) | A kind of simple three phase mains of wiring starts module | |
| CN212379491U (en) | Circuit structure of analog circuit breaker | |
| CN216526821U (en) | Intelligent starting controller | |
| CN219351268U (en) | Leakage protector circuit capable of realizing bidirectional wiring | |
| CN214958675U (en) | Residual current operated circuit breaker | |
| CN215344401U (en) | Alternating current input control device and camera equipment | |
| CN217115938U (en) | Direct current power supply system for road tunnel electromechanical equipment | |
| CN101714774B (en) | Device for automatically switching AC-DC power supply of emergency lighting in transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |