CN211127286U - Simple PC-level dual-power-supply switching switch control circuit - Google Patents
Simple PC-level dual-power-supply switching switch control circuit Download PDFInfo
- Publication number
- CN211127286U CN211127286U CN201922239848.0U CN201922239848U CN211127286U CN 211127286 U CN211127286 U CN 211127286U CN 201922239848 U CN201922239848 U CN 201922239848U CN 211127286 U CN211127286 U CN 211127286U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- pole
- power
- common
- 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
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model relates to a simple and easy type PC level dual power supply change-over switch control circuit, including relay drive circuit, load supply circuit and relay K1The relay drive circuit comprises a power failure detection circuit, a trigger power supply circuit and a relay trigger circuit, wherein K is1The normally open contact and the normally closed contact of the conversion contact are correspondingly connected with a common power supply and a standby power supply, and the common end is connected into the M through a load power supply circuit1Said power supplyThe fault detection circuit comprises 3 paths of voltage reduction circuits connected with 3 paths of common power supplies, and the relay trigger circuit comprises an optocoupler U1Triode Q2And thyristor T1The neutral point is connected with U1The output end of the trigger power supply circuit is respectively connected with the U1C pole, Q of2C pole and T1Gate connection of, said U1E pole and Q of2B pole connection, said common power supply, K1、T1And the ground wire is connected in sequence to form a loop. Compared with the prior art, the utility model has the advantages of small, with low costs.
Description
Technical Field
The utility model belongs to the technical field of dual-power switch electrical apparatus and specifically relates to a simple and easy type PC level dual power transfer switch control circuit is related to.
Background
In order to prevent long-time power failure in some occasions requiring continuous power supply, a commonly-used power supply and a standby power supply are used, and are switched to the standby power supply when the commonly-used power supply fails, wherein an Automatic switching device is a commonly-used device for switching power supplies, and an Automatic switching device (Automatic switching device), namely ATSE (Automatic switching equipment), is a switching device for ensuring continuous and reliable power supply of important electric loads, so that the quality and the reasonable use of ATSE products are particularly important. The automatic switch consists of three parts, namely a switch body, a transmission mechanism and a controller. Common switch bodies are contactors, circuit breakers and load disconnectors. The contactor has low reliability and is gradually eliminated, the ATSE can be divided into a PC stage and a CB stage, the PC stage is the ATSE which can be connected and carried but is not used for breaking the short-circuit current, the CB stage is the ATSE provided with an overcurrent release, and the main contact of the ATSE can be connected and used for breaking the short-circuit current. The simple PC-level dual-power product has the advantages that the structure is small and compact, the control function is realized by small-size components, the product size can be reduced, the miniaturization is realized, the product cost is greatly reduced, and the reliability is higher compared with that of large-size components such as a relay or a transformer. At present, most of existing simple PC-level dual power supply products only have the voltage loss function of detecting a normal standby power supply in order to save cost, and the function of detecting the phase loss of a three-phase power supply cannot be realized. A new requirement is provided after a new version standard GB 14048.11-2016 low-voltage switch equipment and control equipment part 6-1 multifunctional electric appliance switch electric appliance comes out, and a basic dual-power-supply controller has to be capable of detecting common phase loss and voltage loss and only detecting the voltage loss in a standby mode.
In order to solve the above problems, the prior art also provides solutions, and chinese patent CN104716735A proposes a simple dual power conversion device, a control circuit of the device is shown in fig. 9 and 10, a controller power supply is rectified and filtered after passing through a resistance-capacitance voltage reduction circuit from a phase a to obtain a power supply VDD for a relay, and then passes through a voltage stabilization chip to output a power supply VCC, so as to provide power for a detection circuit and the control circuit. The method for detecting open-phase voltage loss by the common power supply comprises the following steps:
when the phase A is in phase loss, the power supply VDD and the power supply VCC are zero, the controller has no power supply, and the optical coupler U2 has no output; one path of the B-phase or C-phase-lacking optical coupler U2 is not conducted, SO that the optical coupler U2 does not output, SO is 0, the relay KA1 is switched from attraction to release, the motor MG1 is electrified through a KA1 normally closed contact, the public end of the motor MG1 supplies power to the delay circuits C5, D11, C12, VD2 and U7 through the normally closed contact, after a certain time delay, the electric appliance KA2 attracts, the public end of the motor MG1 is connected with N, and the motor is switched to a standby power supply; when the common power supply is normal, SO is 1, the relay KA1 is attracted, the motor MG1 is electrified through the KA1 normally open contact, and the common end of the motor MG1 is connected to the N phase through the normally open contact after the relay KA3 is attracted, SO that the motor is converted to the common power supply.
The device has the following two problems:
firstly, signals and a power supply in the circuit use a resistance-capacitance voltage reduction circuit to get electricity from a phase line, and the capacitance is large in size, so that the size of a PCB can be increased;
secondly, the circuit realizes the function through three relays, and the control circuit is complicated and difficult to realize miniaturization and simplification.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple and easy type PC level dual power transfer switch control circuit in order to overcome the defect that above-mentioned prior art exists, convert the load to stand-by power supply when the power supply voltage commonly used for the load power supply is unusual, have advantages such as small, with low costs.
The purpose of the utility model can be realized through the following technical scheme:
a simple PC-level dual-power switch control circuit for supplying load M1The running common power supply can be automatically switched to the standby power supply when in failure, and comprises a relay drive circuit, a load power supply circuit and a relay K1The relay drive circuit comprises a power failure detection circuit and a trigger power supply circuitAnd a relay trigger circuit, said K1The normally open contact and the normally closed contact of the conversion contact are correspondingly connected with a common power supply and a standby power supply, and the common end is connected into the M through a load power supply circuit1The power failure detection circuit comprises 3 paths of voltage reduction circuits connected with 3 paths of common power supplies, the 3 paths of voltage reduction circuits have the same impedance and are connected in parallel to form a neutral point, and the relay trigger circuit comprises an optical coupler U1Triode Q2And thyristor T1The neutral point is connected with U1The output end of the trigger power supply circuit is respectively connected with the U1C pole, Q of2C pole and T1Gate connection of, said U1E pole and Q of2B pole connection, said common power supply, K1、T1And the ground wire is connected in sequence to form a loop.
Furthermore, the power failure detection circuit also comprises a neutral point and a U1The voltage reduction rectification circuit comprises a rectification diode, a voltage reduction resistor and a connector clip JP connected in series in sequence1The plug member JP1The output end is provided with a pull-down resistor.
Furthermore, the trigger power supply circuit comprises a voltage reduction resistor and a rectifier diode which are sequentially connected in series, the trigger power supply circuit is output in 2 paths after passing through the rectifier diode, and the 1 st path is connected with a current limiting resistor in series and then connected with the U1The 2 nd path is connected with Q after passing through a current-limiting resistor2Is connected with the C pole.
Furthermore, a voltage stabilizing filter circuit is connected between the output end of the rectifier diode and the ground wire, and comprises a pull-down resistor, a voltage stabilizing diode, an electrolytic capacitor and a non-polar capacitor which are connected in parallel.
Further, K is1The switching device comprises 3 paths of switching contacts, wherein a normally closed contact and a normally open contact of a1 st switching contact in the 3 paths of switching contacts are correspondingly connected with an N line of a standby power supply and an N line of a common power supply, the normally closed contact and the normally open contact of a2 nd switching contact are respectively idle and connected with an A line of the common power supply, and the normally closed contact and the normally open contact of the 3 rd switching contact are respectively connected with a standby power supplyAnd the source line A is idle, and the load power supply circuit comprises 3 connecting circuits which are respectively connected with the common ends of the 3 switching contacts.
Furthermore, the common end of the 1 st path switching contact is connected with the M1The connecting circuit between the two switches is connected with 1 automatic/manual switch in series, and the common end of the 2 nd path and the 3 rd path switching contact is connected with M1And 1 auxiliary switch is respectively connected in series on the 2 connecting circuits between.
Furthermore, the 2-path connecting circuit connected with the 2 nd path and the 3 rd path of switching contact and the connecting circuit connected with the 1 st path of switching contact are connected with an arc discharge absorption circuit, and the arc discharge absorption circuit comprises a resistor and a non-polar capacitor which are connected in series.
Further, still include 2 power indicator light supply circuit who uses NA and RA as input respectively, this power indicator light supply circuit includes rectifier diode, step-down resistance and the emitting diode that connects gradually in series, and wherein the power indicator light supply circuit who uses NA as the input still includes the triode Q that is used for cutting off emitting diode1Q of the1The C pole and the E pole of the LED are correspondingly connected with the anode and the cathode of the LED, and the Q pole is connected with the anode and the cathode of the LED1B pole of the current limiting resistor is connected with U pole in series1Is connected to the E pole of (b).
Further, K is1And T1A rectifying full bridge circuit is also connected in series between the T and the T1And a pull-down resistor is connected between the gate and the ground wire.
Further, the U is1The filter circuit is connected between the E pole and the ground wire and comprises a pull-down resistor, an electrolytic capacitor and a non-polar capacitor which are connected in parallel.
Compared with the prior art, the utility model discloses have with following beneficial effect:
(1) the utility model discloses a power failure detection circuit connects in parallel through setting up 3 circuit step-down circuit that step-down impedance is the same that is connected with 3 of the power of using always, form a neutral point, relay trigger circuit has set up 1 opto-coupler, 1 triode and 1 silicon controlled rectifier that connect gradually and supplied power by the trigger power supply circuit simultaneously, the voltage of neutral point is nonzero when the phase failure or decompression appear in the power of using always, thereby trigger opto-coupler, triode and silicon controlled rectifier in proper order, wherein the silicon controlled rectifier inserts the power after being established ties with the relay, the silicon controlled rectifier is switched on after being triggered, the relay accomplishes the load through 3 way conversion contacts and turns to the stand-by power supply from the power supply power of using always, power failure detection circuit retrencies, only accomplish the switching dual supply through a relay, the trigger power supply circuit gets the electricity through step-down resistance and, the cost is low and the volume is small;
(2) the utility model discloses set up power indicator power supply circuit to connect the both ends of the emitting diode on power indicator power supply circuit commonly used through the triode of a B utmost point connection opto-coupler E utmost point, when the power commonly used appears and lacks looks or when losing voltage triggers opto-coupler and this triode in proper order, the emitting diode who instructs the power commonly used state cuts off, thereby convey the power failure signal commonly used, prevent the misindication, the circuit component is few simultaneously, simple structure, it is with low costs;
(3) the utility model is connected with an auxiliary switch and a manual switch in series on the load power supply circuit, the auxiliary switch can detect and control the connection between the load and the power supply, when the load is a motor, the automatic/manual switch can control the connection between the motor and the control zero line, so as to realize the automatic and manual control of the conversion motor;
(4) the utility model discloses be connected with between 1 way that is connected with power N in load supply circuit's 3 ways and all the other 2 ways and draw the arc absorption circuit for the high pressure that produces when absorbing relay's change over switch switches over draws the arc, has improved the stability of circuit security and load work.
Drawings
Fig. 1 is a schematic circuit block diagram of the present invention;
FIG. 2 is a schematic block diagram of a power failure detection circuit;
FIG. 3 is a diagram of a relay drive circuit;
FIG. 4 is a power supply circuit diagram of the power indicator;
FIG. 5 is a relay connection circuit diagram;
FIG. 6 is a load supply circuit diagram;
FIG. 7 is an overall circuit diagram of the present invention;
fig. 8 is a circuit operation flow chart of the present invention;
FIG. 9 is a circuit diagram of a three-phase no-voltage detection circuit of the comparative patent;
FIG. 10 is a schematic diagram of a control circuit of the comparative patent;
the reference numbers in the figures illustrate:
11. and (3) triggering a power supply circuit, 12. a power failure detection circuit, and 13. a relay triggering circuit.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A simple PC-level dual-power switch control circuit, as shown in FIG. 1, for accessing a load M1When the three-phase four-wire common power supply fails, the three-phase four-wire common power supply is automatically switched to a standby power supply comprising an A wire and an N wire, the N three-phase four-wire is connected through a socket N _ Input, the A wire and the N wire of the standby power supply are connected through a socket R _ Input, and the simple PC-level dual-power-supply switching control circuit comprises a relay drive circuit, a load power supply circuit and a relay K1The relay driving circuit comprises a trigger power supply circuit 11, a power failure detection circuit 12 and a relay trigger circuit 13, as shown in fig. 2 and fig. 3, the power failure detection circuit 12 comprises 3 voltage reduction circuits which are connected in parallel and respectively connected with 3 phases of a common power supply, the 3 voltage reduction circuits have the same impedance and are respectively connected in series with R16And R17、R19And R20And R22And R23The phase difference between three phases is 120 degrees, when the three phases have basically the same voltage, the 3 voltage reduction circuits are intersected to form a neutral point S0 with zero voltage, and neutral points S0 and U are connected with each other1Between the C poles of the three-phase transformer are sequentially connected with a rectifier diode D in series10Voltage reducing resistor R21And plug member JP1Plug-in part JP1For controlling whether three phases of a common power supply are connected into U1Plug-in part JP1The output end is provided with a pull-down resistor R24Reduction of interferenceFalse trigger U1The probability of (c).
The relay trigger circuit 13 comprises an optocoupler U1Triode Q2And thyristor T1，U1E pole and Q of2B pole of (1) and N line NN connection of common power supply, Q2C pole and T1Gate pole connection of, relay K1One end of the N is connected with the A line NA of the N, and the other end of the N is sequentially connected with a rectifier diode D5、D7、D8And D9Constructed rectifying full bridge circuit, T1And a ground line forming a loop, T1A pull-down resistor R is connected between the gate pole and the ground wire30Reducing the interference false triggering T1The probability of the gate.
The trigger power supply circuit is sequentially connected with a voltage reduction resistor R in series from NA12、R13、R14And R15And a rectifier diode D6Through a rectifier diode D6A post-branch 2-path output, a1 st path series current-limiting resistor R29Rear and U1Is connected with the E pole, the 2 nd path is connected with a current limiting resistor R in series11After and Q2Is connected with the C pole.
As shown in FIGS. 5 and 6, K1The normally open contact and the normally closed contact of the conversion contact are correspondingly connected with a common power supply and a standby power supply, and the common end is connected into the M through a load power supply circuit1，K1Including 3 switching contact, this 3 switching contact's 1 st switching contact's normally closed contact and normally open contact correspond the N line of connecting stand-by power supply and the N line of power commonly used, 2 nd switching contact's normally closed contact and normally open contact are vacant respectively and are connected the A line of power commonly used, 3 rd switching contact's normally closed contact and normally open contact are connected stand-by power supply's A line and vacant respectively, load supply circuit includes 3 ways and links to each other with 3 way switching contact's common port respectively connecting circuit.
Common terminal and M of path 2 and path 3 switching contacts 12 connecting circuits between the two circuits are respectively connected in series with 1 auxiliary switch, wherein the auxiliary switch N _ AUX is used for controlling and detecting the switching-on and switching-off state of a common power supply, the auxiliary switch R _ AUX is used for controlling and detecting the switching-on and switching-off state of a standby power supply, and the 2 connecting circuits connected with the 2 nd switching contact and the 3 rd switching contact are connectedArc absorbing circuits are connected between the connecting circuits connected with the 1 st path of switching contact for absorbing K1The arc absorbing circuit comprises resistors R27 and R28 and a non-polar capacitor C3And C4。
As shown in fig. 4, the simple PC-level dual power supply changeover switch control circuit further includes 2 power indicator lamp power supply circuits respectively using NA and RA as inputs, and the power indicator lamp power supply circuit of the common power supply includes a rectifier diode D3, a voltage reduction resistor R connected in series in sequence3、R7And the power supply circuit of the standby power supply indicator lamp comprises a rectifier diode D which is sequentially connected in series4Voltage reducing resistor R4、R8And light emitting diode RPWR, NPWR and RPWR are all lighted when power supply is normal and standby power supply, and power indicator lamp power supply circuit using NA as input further comprises triode Q for cutting off NPWR1Q of the1The C pole and the E pole of the NPWR are correspondingly connected with the positive pole and the negative pole of the NPWR, and the Q is1B pole of the current limiting resistor is connected with U pole in series1E pole connection of U when common power supply is out of phase1Has an E pole of output, Q1Is conducted to cut off NPWR, and NPWR is extinguished to indicate that the phase failure of the common power supply occurs, so as to prevent error indication.
A voltage stabilizing filter circuit is connected between the output end of the rectifier diode and the ground wire and comprises a pull-down resistor R connected in parallel10Zener diode ZD1And an electrolytic capacitor E2And a non-polar capacitor C1，U1The E pole and the ground wire are connected with a filter circuit which comprises a pull-down resistor R connected in parallel25And an electrolytic capacitor E1And a non-polar capacitor C2The electrodeless capacitor comprises mica, acrylic or ceramic capacitor, and the Zener diode is used for stabilizing the input Q2The parallel electrolytic capacitor is used for reducing the noise generated by the voltage stabilizing diode, the electrolytic capacitor has winding inductance and has poor high-frequency noise filtering effect, the capacity of the electrodeless capacitor is small, and the electrodeless capacitor is used for filtering the high-frequency noise in the NA, so that high-frequency and low-frequency components contained in the NA are fully bypassed, the voltage stabilizing effect is increased, and the error is integrally reducedTrigger Q2The overall circuit diagram of the simple PC-level dual power switch control circuit is shown in fig. 7.
As shown in fig. 8, the power failure detection circuit comprises 3 voltage reduction circuits connected with 3 of the common power supply, the 3 voltage reduction circuits have the same impedance and are connected in parallel to form a neutral point, and the relay trigger circuit comprises an optocoupler U1Triode Q2And thyristor T1Neutral point is connected to U1The output end of the trigger power supply circuit is respectively connected with the U1C pole, Q of2C pole and T1Of the gate connection, U1E pole and Q of2B pole connection, common power supply, K1、T1And the ground wire are connected in sequence to form a loop, when the voltage of a neutral point is zero when the common power supply is normal, U is1Not triggered, Q2Cut-off, T1The gate pole is triggered by a trigger power supply circuit, a common power supply, K1、T1A loop formed by connecting with the ground wire in sequence is conducted, K1Closing, respectively connecting the common ends of the 1 st path, the 2 nd path and the 3 rd path conversion contacts with the normally open contact, M1An A line and an N line of a common power supply are accessed; when the A phase, the B phase and the C phase of the common power supply have phase loss or voltage loss, the voltage of a neutral point is not zero, and U1Is triggered, Q2On, the current triggering the supply circuit is cut off to ground, T1Without the gate being triggered, common power supply, K1、T1And a circuit formed by sequentially connecting the ground line and the ground line is not conducted, wherein when K is connected with the circuit1Phase-out time of connection K1Direct power-off, i.e. when the common power supply is in phase failure or voltage loss, K1When the power is off, the common ends of the 1 st path, the 2 nd path and the 3 rd path switching contacts are respectively connected with the normally closed contacts, M1A line and N line of the standby power supply are connected to realize M1Conversion from a common power source to a backup power source.
Load M1Is a motor which can rotate positively and negatively, the common end of the 1 st path of conversion contact is connected with the M1The connecting circuit between the two is connected with 1 automatic/manual switch A/M in series, when the automatic/manual switch is switched on, the zero line of the motor is switched on with the control zero line, and the motor can rotate forward and backward to automatically drive the mechanism to convert; when coming fromWhen the manual/manual switch is switched off, the zero line of the motor is switched off from the control zero line, and the motor can not be powered, so that only manual conversion can be performed.
This embodiment has provided a simple and easy type PC level dual supply change-over switch control circuit, has realized that power commonly used detects lack of phase and decompression function, and stand-by power supply detects the decompression function, does not use stand-by power supply when power commonly used voltage is normal, has the change-over switch A/M of the manual and automatic mode of change-over motor, has only used a relay K1The dual-power conversion is realized, the structure is compact, the size is small, and the cost is low.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A simple PC-level dual-power switch control circuit for supplying load M1The running common power supply can be automatically switched to the standby power supply when in failure, and comprises a relay drive circuit, a load power supply circuit and a relay K1The relay drive circuit comprises a power failure detection circuit, a trigger power supply circuit and a relay trigger circuit, wherein K is1The normally open contact and the normally closed contact of the conversion contact are correspondingly connected with a common power supply and a standby power supply, and the common end is connected into the M through a load power supply circuit1The power failure detection circuit is characterized by comprising 3 paths of voltage reduction circuits connected with 3 paths of common power supplies, the 3 paths of voltage reduction circuits have the same impedance and are connected in parallel to form a neutral point, and the relay trigger circuit comprises an optocoupler U1Triode Q2And thyristor T1The neutral point is connected with U1The output end of the trigger power supply circuit is respectively connected with the U1C pole, Q of2C pole and T1A gate connection of, saidU1E pole and Q of2B pole connection, said common power supply, K1、T1And the ground wire is connected in sequence to form a loop.
2. The simple PC-level dual power supply changeover switch control circuit of claim 1, wherein the power failure detection circuit further comprises a neutral point and a U1The voltage reduction rectification circuit comprises a rectification diode, a voltage reduction resistor and a connector clip JP connected in series in sequence1The plug member JP1The output end is provided with a pull-down resistor.
3. The simple PC-level dual-power-supply switching control circuit of claim 1, wherein the trigger power supply circuit comprises a voltage reduction resistor and a rectifier diode which are connected in series in sequence, the trigger power supply circuit is divided into 2 paths of output after passing through the rectifier diode, and the 1 st path of output is connected in series with a current limiting resistor and then connected with a U1The 2 nd path is connected with Q after passing through a current-limiting resistor2Is connected with the C pole.
4. The simple PC-level dual-power-supply switching control circuit as claimed in claim 3, wherein a voltage stabilizing filter circuit is connected between the output end of the rectifying diode and the ground wire, and comprises a pull-down resistor, a voltage stabilizing diode, an electrolytic capacitor and a non-polar capacitor which are connected in parallel.
5. The simple PC-level dual power supply switch control circuit as claimed in claim 1, wherein the K is1Including 3 switching contacts, this 3 switching contacts in 1 st switching contact's normally closed contact and normally open contact correspond and connect stand-by power supply's N line and power supply's N line commonly used, 2 nd switching contact's normally closed contact and normally open contact are vacant respectively and are connected power supply's A line commonly used, 3 rd switching contact's normally closed contact and normally open contact are connected stand-by power supply's A line and vacant respectively, load supply circuit include 3 ways respectively with 3 ways switching contact respectively and touchA connection circuit to which the common terminals of the points are connected.
6. The simple PC-level dual power supply switch control circuit as claimed in claim 5, wherein the common terminal of the 1 st switching contact and M are connected1The connecting circuit between the two switches is connected with 1 automatic/manual switch in series, and the common end of the 2 nd path and the 3 rd path switching contact is connected with M1And 1 auxiliary switch is respectively connected in series on the 2 connecting circuits between.
7. The simple PC-level dual-power-supply changeover switch control circuit as claimed in claim 5, wherein a 2-way connecting circuit connected with the 2 nd and 3 rd changeover contacts and a connecting circuit connected with the 1 st changeover contact are connected with an arc discharge absorption circuit, and the arc discharge absorption circuit comprises a resistor and a nonpolar capacitor which are connected in series.
8. The simple PC-level dual-power-supply switching control circuit of claim 1, further comprising 2 power indicator lamp power supply circuits respectively taking NA and RA as inputs, wherein the power indicator lamp power supply circuit comprises a rectifier diode, a voltage reduction resistor and a light emitting diode which are sequentially connected in series, and the power indicator lamp power supply circuit taking NA as an input further comprises a triode Q for cutting off the light emitting diode1Q of the1The C pole and the E pole of the LED are correspondingly connected with the anode and the cathode of the LED, and the Q pole is connected with the anode and the cathode of the LED1B pole of the current limiting resistor is connected with U pole in series1Is connected to the E pole of (b).
9. The simple PC-level dual power supply switch control circuit as claimed in claim 1, wherein the K is1And T1A rectifying full bridge circuit is also connected in series between the T and the T1And a pull-down resistor is connected between the gate and the ground wire.
10. The simple PC-level dual power supply switch control circuit as claimed in claim 1, wherein the U is provided with a power supply circuit1The filter circuit is connected between the E pole and the ground wire and comprises a pull-down resistor, an electrolytic capacitor and a non-polar capacitor which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239848.0U CN211127286U (en) | 2019-12-14 | 2019-12-14 | Simple PC-level dual-power-supply switching switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922239848.0U CN211127286U (en) | 2019-12-14 | 2019-12-14 | Simple PC-level dual-power-supply switching switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211127286U true CN211127286U (en) | 2020-07-28 |
Family
ID=71707003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922239848.0U Active CN211127286U (en) | 2019-12-14 | 2019-12-14 | Simple PC-level dual-power-supply switching switch control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211127286U (en) |
-
2019
- 2019-12-14 CN CN201922239848.0U patent/CN211127286U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104158282A (en) | Dual-circuit switching control power circuit and high-voltage inverter | |
| CN112103922B (en) | Power supply protection device, method and driver | |
| CN211127286U (en) | Simple PC-level dual-power-supply switching switch control circuit | |
| CN111009959A (en) | Simple PC-level dual-power-supply switching switch control circuit | |
| CN109946598A (en) | Double control switch detection circuit and device | |
| CN206117164U (en) | Circuit voltage regulator | |
| CN211046559U (en) | Intelligent spare power automatic switching device for direct-current power supply of transformer substation | |
| CN114759532A (en) | Self-charging cut-off direct current breaker and control method thereof | |
| CN204905873U (en) | Intelligent compound switch | |
| CN209150792U (en) | EPS inversion switching device and emergency power supply | |
| CN201113248Y (en) | Ring net cabinet control device | |
| CN109346382A (en) | A kind of single lamp instruction device of high-tension switch cabinet inner breaker divide-shut brake movement | |
| CN202598446U (en) | Energy-saving road lamp high-voltage switch | |
| CN2479621Y (en) | Conversion device of controlling circuit voltage for automatic switching electrical equipment | |
| CN220156283U (en) | Automatic opening and closing control circuit of low-voltage power generation incoming line cabinet | |
| CN220628946U (en) | Low-cost PC-level dual-power automatic transfer switch control circuit | |
| CN217332736U (en) | Zero-crossing detection function realization and calibration circuit | |
| CN218514093U (en) | Wide voltage output circuit of parallel power supply | |
| CN215580512U (en) | Dual-power industrial switch for process layer | |
| CN203983745U (en) | A kind of switch cubicle power supply adjustment System | |
| CN214495458U (en) | Simple and reliable wiping line ice melting device | |
| CN211605044U (en) | Multi-gear voltage control switching circuit | |
| CN216121909U (en) | Dual-power automatic switching device for transformer substation protection device | |
| CN210110649U (en) | Circuit breaker with on-off relay intelligent control module | |
| CN219513805U (en) | Alternating current-direct current dual power supply mixed cutting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |