CN217545673U - Automatic switching circuit of commercial power and fuel generator - Google Patents
Automatic switching circuit of commercial power and fuel generator Download PDFInfo
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- CN217545673U CN217545673U CN202220975361.8U CN202220975361U CN217545673U CN 217545673 U CN217545673 U CN 217545673U CN 202220975361 U CN202220975361 U CN 202220975361U CN 217545673 U CN217545673 U CN 217545673U
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Abstract
The utility model provides an automatic switching circuit of commercial power and fuel generator, through setting up DC voltage source, adopt the DC voltage source power supply mode to replace traditional commercial power supply, can provide steady voltage for the AC contactor coil, solve the problem that the existing mountain area commercial power is unstable and leads to the unable normal work of contactor in the fuel generator; the connecting structure of the first alternating current contactor and the second alternating current contactor is set to be an interlocking structure, so that the safety is higher; the first reverse connection preventing circuit and the second reverse connection preventing circuit are arranged, and the problem that the self-starting circuit cannot work normally due to the fact that two I/O ports of the processor output high levels at the same time is solved.
Description
Technical Field
The utility model relates to a generating set's controlling means technical field especially relates to an automatic switching circuit of commercial power and fuel generator.
Background
The self-starting process of the fuel generator is as follows: a main contact of an alternating current contactor is connected in series in a main loop of a mains supply and a fuel generator, and the on-off of a power supply loop of the fuel generator is realized by controlling the on-off of the main contact. General alternating current coil contactor connects the commercial power, and the commercial power is unstable can not keep invariable like the direct current, and when fuel oil generator uses in mountain area, because mountain area electric wire netting environment is abominable, the commercial power can drop to 100V sometimes, also can be as high as several hundred volts sometimes, can not be like city's commercial power maintenance in a balanced range, and the abominable electric wire netting environment in mountain area leads to alternating current coil contactor easily to burn out when the commercial power is higher, and alternating current coil contactor can not the actuation when the commercial power is lower. Therefore, in order to solve the above problem, the utility model provides a commercial power and fuel generator's automatic switching circuit is from the dc voltage source that is equipped with on fuel generator, adopts the dc voltage source to replace traditional commercial power supply mode, solves the problem that ac contactor supply voltage unstability leads to the unable normal work of fuel generator.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a commercial power and fuel oil generator's automatic switching circuit, the DC voltage source that possess oneself on fuel oil generator adopts the DC voltage source to replace traditional commercial power supply mode, solves the unstable problem that leads to the unable normal work of fuel oil generator of ac contactor supply voltage.
The technical scheme of the utility model is realized like this: the utility model provides an automatic switching circuit of commercial power and a fuel generator, which comprises a first AC contactor, a second AC contactor, a first relay circuit, a second relay circuit and a processor, and also comprises a DC voltage source;
the I/O1 of the processor is electrically connected with one end of a normally closed contact of the first alternating current contactor through a first relay circuit, and the other end of the normally closed contact is electrically connected with a negative voltage output end of the direct current voltage source through a coil of the second alternating current contactor;
the I/O2 of the processor is electrically connected with one end of a normally closed contact of the second alternating current contactor through the second relay circuit, and the other end of the normally closed contact is electrically connected with the negative-pressure output end of the direct current voltage source through a coil of the first alternating current contactor.
On the basis of the above technical solution, preferably, the first relay circuit includes a first relay and a first switch circuit;
the I/O1 of the processor is electrically connected with one end of a coil of the first relay through the first switch circuit, the other end of the coil of the first relay is electrically connected with the power supply, one end of a normally open contact of the first relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other end of the normally open contact is electrically connected with one end of a normally closed contact of the first alternating current contactor.
On the basis of the above technical solution, preferably, the second relay circuit includes a second relay and a second switch circuit;
the I/O2 of the processor is electrically connected with one end of a coil of the second relay through the second switch circuit, the other end of the coil of the second relay is electrically connected with the power supply, one end of a normally open contact of the second relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other two ends of the normally open contact are electrically connected with one end of a normally closed contact of the second alternating current contactor.
In addition to the above technical solution, preferably, the first switch circuit includes: the resistor R1, the resistor R3 and the triode VT2;
the I/O1 of the processor is electrically connected with the base electrode of the triode VT2 through the resistor R1, the collector electrode of the triode VT2 is electrically connected with one end of the coil of the first relay, the emitting electrode of the triode VT2 is grounded, and the resistor R3 is connected between the emitting electrode and the base electrode of the triode VT2 in parallel.
On the basis of the above technical solution, preferably, the first relay circuit and the second relay circuit have the same structure.
On the basis of the technical scheme, the anti-reverse-connection circuit also comprises a first anti-reverse-connection circuit and a second anti-reverse-connection circuit;
the input end of the first reverse-connection preventing circuit is electrically connected with the I/O1 of the processor, and the output end of the first reverse-connection preventing circuit is electrically connected with one end of a coil of the second relay;
the input end of the second reverse-connection preventing circuit is electrically connected with the I/O2 of the processor, and the output end of the second reverse-connection preventing circuit is electrically connected with one end of the coil of the first relay.
On the basis of the above technical solution, preferably, the first anti-reverse connection circuit includes a diode VD1;
the anode of the diode VD1 is electrically connected with the I/O1 of the processor, and the cathode of the diode VD1 is electrically connected with one end of the coil of the second relay.
On the basis of the technical scheme, preferably, the first anti-reverse connection circuit and the second anti-reverse connection circuit have the same structure.
The utility model discloses an automatic switching circuit of commercial power and fuel generator has following beneficial effect for prior art:
(1) By arranging the direct-current voltage source, the direct-current voltage source power supply mode is adopted to replace the traditional mains supply power supply mode, so that stable voltage can be provided for an alternating-current contactor coil, and the problem that the existing contactor cannot work normally due to unstable mains supply in mountainous areas is solved;
(2) The connecting structure of the first alternating current contactor and the second alternating current contactor is set to be an interlocking structure, so that the safety is higher;
(3) The first reverse connection preventing circuit and the second reverse connection preventing circuit are arranged, and the problem that the self-starting circuit cannot work normally due to the fact that two I/O ports of the processor output high levels at the same time is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of an automatic switching circuit of a commercial power and fuel generator according to the present invention;
fig. 2 is an electrical diagram of an automatic switching circuit of the utility model for the commercial power and the fuel generator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only 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 all belong to the protection scope of the present invention.
Because the power grid environment in mountain areas is bad, the commercial power can drop to 100V sometimes, and can be high to several hundred volts sometimes, and the commercial power in urban areas can not be maintained in a balance range, and the power grid environment in mountain areas leads to that the alternating current coil contactor is easy to burn out when the commercial power is high, and the alternating current coil contactor can not be pulled in when the commercial power is low. Therefore, in order to solve the above problem, the present invention provides an automatic switching circuit for a commercial power and a fuel generator, as shown in fig. 1, which includes a dc voltage source, a first ac contactor, a second ac contactor, a first relay circuit, a second relay circuit and a processor. The direct-current voltage source power supply mode is adopted to replace the traditional mains supply mode, stable voltage can be provided for the alternating-current contactor coil, and the problem that the fuel generator cannot normally work due to the fact that the existing mountain mains supply is unstable is solved.
Specifically, an I/O1 of the processor is electrically connected with one end of a normally closed contact of a first alternating current contactor through a first relay circuit, and the other end of the normally closed contact is electrically connected with a negative-pressure output end of a direct current voltage source through a coil of a second alternating current contactor; the I/O2 of the processor is electrically connected with one end of a normally closed contact of the second alternating current contactor through the second relay circuit, and the other end of the normally closed contact is electrically connected with the negative-pressure output end of the direct current voltage source through a coil of the first alternating current contactor. The main contacts of the first alternating current contactor and the second alternating current contactor are connected in series in a main loop of a mains supply and the fuel generator. In this embodiment, I/O1 of the processor is represented by ACOUT, and I/O2 of the processor is represented by MTOUT.
The first relay circuit and the second relay circuit are respectively used for controlling the coil power supply on-off of the first alternating current contactor and the second alternating current contactor, and the first alternating current contactor and the second alternating current contactor are mutually interlocked, namely the first alternating current contactor and the second alternating current contactor can only be conducted one way. Further preferably, the first relay circuit includes a first relay and a first switch circuit; the I/O1 of the processor is electrically connected with one end of a coil of the first relay through the first switch circuit, the other end of the coil of the first relay is electrically connected with the power supply, one end of a normally open contact of the first relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other end of the normally open contact is electrically connected with one end of a normally closed contact of the first alternating current contactor. Further preferably, the second relay circuit includes a second relay and a second switch circuit; the I/O2 of the processor is electrically connected with one end of a coil of the second relay through the second switch circuit, the other end of the coil of the second relay is electrically connected with the power supply, one end of a normally open contact of the second relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other two ends of the normally open contact are electrically connected with one end of a normally closed contact of the second alternating current contactor. In the present embodiment, the first relay circuit and the second relay circuit are identical in structure, and therefore, only the structure of the first relay circuit will be described herein. In the present embodiment, as shown in fig. 2, the first relay is denoted by K1, the second relay is denoted by K2, the first ac contactor is denoted by K3, and the second ac contactor is denoted by K4. In the embodiment, a diode is connected in parallel with the coils of the relay K1 and the relay K2 respectively, so that the induced potential of the coils when the coils are powered on and powered off is prevented from damaging a driver or other elements.
Preferably, as shown in fig. 2, the first switching circuit includes: the resistor R1, the resistor R3 and the triode VT2; the I/O1 of the processor is electrically connected with the base electrode of the triode VT2 through the resistor R1, the collector electrode of the triode VT2 is electrically connected with one end of the coil of the first relay, the emitting electrode of the triode VT2 is grounded, and the resistor R3 is connected between the emitting electrode and the base electrode of the triode VT2 in parallel. The structure of the second switch circuit is shown in fig. 2, and will not be described again.
Wherein, IO 1 output high level of treater is to triode VT 2's base, triode VT2 switches on, at this moment, the coil of first relay is electrified, the normally open contact of first relay is closed, direct current voltage source's malleation output, the normally open contact of first relay, first ac contactor's normally closed contact, second ac contactor's coil and direct current voltage source's negative pressure output end form closed circuit, and second ac contactor's coil is electrified, second ac contactor's normally open contact disconnection, and then break off the circuit between second relay circuit and first ac contactor's the coil, play the interlocking effect.
Further preferably, in order to prevent the processor from malfunctioning and causing the I/O1 and the I/O2 of the processor to output high levels at the same time, the present embodiment provides a first anti-reverse connection circuit and a second anti-reverse connection circuit, and when one of the anti-reverse connection circuits is turned on, the other relay circuit is short-circuited. The input end of the first reverse-connection preventing circuit is electrically connected with an I/O1 of the processor, and the output end of the first reverse-connection preventing circuit is electrically connected with one end of a coil of the second relay; the input end of the second reverse-connection preventing circuit is electrically connected with the I/O2 of the processor, and the output end of the second reverse-connection preventing circuit is electrically connected with one end of the coil of the first relay. In this embodiment, the first anti-reverse connection circuit and the second anti-reverse connection circuit have the same structure, and therefore, only the structure and principle of the first anti-reverse connection circuit will be described herein. Preferably, the first anti-reverse connection circuit comprises a diode VD1; the anode of the diode VD1 is electrically connected with the I/O1 of the processor, and the cathode of the diode VD1 is electrically connected with one end of the coil of the second relay. When the processor is in fault, both the I/O1 and the I/O2 output high levels, because the time sequences of the I/O1 and the I/O2 output levels cannot be completely synchronous, the I/O1 and the I/O2 output high levels at intervals of several seconds, and in the time interval, the first anti-reverse-connection circuit and the second anti-reverse-connection circuit can cut off one relay circuit, so that the two relay circuits are prevented from being simultaneously conducted, and the function of protecting a rear-stage circuit is achieved. Specifically, firstly, the triode VT2 is conducted, the +12V voltage passes through the coil of the first relay, the conducted triode VT2 is grounded, and the diode VD1 is cut off; I/O2 outputs high level after a few seconds or a few microseconds, at the moment, the high level on the I/O2 is output to a diode VD1, the diode VD1 is conducted, a level signal passes through the diode VD1 and a conducted triode VT2 is grounded, the triode VT1 is short-circuited, a second relay cannot be electrified, and a rear-stage circuit is protected.
The working principle of the embodiment is as follows: the IO 1 of treater outputs high level to triode VT 2's base, meanwhile, the IO 2 of treater outputs low level to triode VT 1's base, triode VT1 ends, at this moment, the coil of first relay is gone up the electricity, the normally open contact of first relay is closed, direct current voltage source's malleation output, the normally open contact of first relay, the normally closed contact of first ac contactor, the coil of second ac contactor and direct current voltage source's negative pressure output end form the closed circuit, the coil of second ac contactor is gone up the electricity, the normally open contact disconnection of second ac contactor, and then the circuit between second relay circuit and first ac contactor's the coil is disconnected.
The beneficial effect of this embodiment does: by arranging the direct-current voltage source, the direct-current voltage source power supply mode is adopted to replace the traditional mains supply power supply mode, so that stable voltage can be provided for an alternating-current contactor coil, and the problem that the existing contactor cannot work normally due to unstable mains supply in mountainous areas is solved;
the connecting structure of the first alternating current contactor and the second alternating current contactor is set to be an interlocking structure, so that the safety is higher;
the first reverse connection preventing circuit and the second reverse connection preventing circuit are arranged, and the problem that the self-starting circuit cannot work normally due to the fact that two I/O ports of the processor output high levels at the same time is solved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an automatic switching circuit of commercial power and fuel oil generator, its includes first ac contactor, second ac contactor, first relay circuit, second relay circuit and treater, its characterized in that: the device also comprises a direct current voltage source;
the I/O1 of the processor is electrically connected with one end of a normally closed contact of the first alternating current contactor through a first relay circuit, and the other end of the normally closed contact is electrically connected with a negative voltage output end of the direct current voltage source through a coil of the second alternating current contactor;
the I/O2 of the processor is electrically connected with one end of a normally closed contact of the second alternating current contactor through the second relay circuit, and the other end of the normally closed contact is electrically connected with the negative-pressure output end of the direct current voltage source through a coil of the first alternating current contactor.
2. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 1, wherein: the first relay circuit includes a first relay and a first switch circuit;
the I/O1 of the processor is electrically connected with one end of a coil of the first relay through the first switch circuit, the other end of the coil of the first relay is electrically connected with the power supply, one end of a normally open contact of the first relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other end of the normally open contact is electrically connected with one end of a normally closed contact of the first alternating current contactor.
3. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 2, wherein: the second relay circuit includes a second relay and a second switch circuit;
the I/O2 of the processor is electrically connected with one end of a coil of the second relay through the second switch circuit, the other end of the coil of the second relay is electrically connected with the power supply, one end of a normally open contact of the second relay is electrically connected with a positive voltage output end of the direct current voltage source, and the other two ends of the normally open contact are electrically connected with one end of a normally closed contact of the second alternating current contactor.
4. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 3, wherein: the first switching circuit includes: the resistor R1, the resistor R3 and the triode VT2;
the I/O1 of the processor is electrically connected with the base electrode of the triode VT2 through the resistor R1, the collector electrode of the triode VT2 is electrically connected with one end of the coil of the first relay, the emitting electrode of the triode VT2 is grounded, and the resistor R3 is connected between the emitting electrode and the base electrode of the triode VT2 in parallel.
5. The automatic switching circuit of the commercial power and the fuel generator as claimed in claim 3 or 4, wherein: the first relay circuit and the second relay circuit have the same structure.
6. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 5, wherein: the circuit also comprises a first reverse connection prevention circuit and a second reverse connection prevention circuit;
the input end of the first reverse-connection preventing circuit is electrically connected with an I/O1 of the processor, and the output end of the first reverse-connection preventing circuit is electrically connected with one end of a coil of the second relay;
the input end of the second reverse-connection preventing circuit is electrically connected with the I/O2 of the processor, and the output end of the second reverse-connection preventing circuit is electrically connected with one end of the coil of the first relay.
7. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 6, wherein: the first anti-reverse connection circuit comprises a diode VD1;
the anode of the diode VD1 is electrically connected with the I/O1 of the processor, and the cathode of the diode VD1 is electrically connected with one end of the coil of the second relay.
8. The automatic switching circuit of the utility power and the fuel generator as claimed in claim 6, wherein: the first anti-reverse connection circuit and the second anti-reverse connection circuit are identical in structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975361.8U CN217545673U (en) | 2022-04-25 | 2022-04-25 | Automatic switching circuit of commercial power and fuel generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975361.8U CN217545673U (en) | 2022-04-25 | 2022-04-25 | Automatic switching circuit of commercial power and fuel generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217545673U true CN217545673U (en) | 2022-10-04 |
Family
ID=83430719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220975361.8U Active CN217545673U (en) | 2022-04-25 | 2022-04-25 | Automatic switching circuit of commercial power and fuel generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217545673U (en) |
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2022
- 2022-04-25 CN CN202220975361.8U patent/CN217545673U/en active Active
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