CN203774865U - A dual power switching circuit for fan power supply and a high-voltage inverter - Google Patents

A dual power switching circuit for fan power supply and a high-voltage inverter Download PDF

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Publication number
CN203774865U
CN203774865U CN201420159317.5U CN201420159317U CN203774865U CN 203774865 U CN203774865 U CN 203774865U CN 201420159317 U CN201420159317 U CN 201420159317U CN 203774865 U CN203774865 U CN 203774865U
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contactor
power supply
blower fan
coil
power
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CN201420159317.5U
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王波
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Shenzhen Invt Electric Co Ltd
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Shenzhen Invt Electric Co Ltd
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Abstract

The utility model relates to a dual power switching circuit for fan power supply and a high-voltage inverter. A first power supply end, a first circuit breaker, a first contactor and fans form a first main loop, and a second power supply end, a second circuit breaker, a second contactor and the fans form the other main loop. The two main loops are interlocked through the first contactor and the second contactor. When a coil of the first contactor is power-on, the normally-closed contact of the first contactor is disconnected, so that a coil of the second contactor is in power loss, the main contact of the second contactor is disconnected and the first power supply end supplies power to the fans. Similarly, when the coil of the second contactor is power-on, the normally-closed contact of the second contactor is disconnected, so that the coil of the first contactor is in power loss and the main contact of the first contactor is disconnected and the second power supply end supplies power to the fans. Under the action of the first contactor and the second contactor, when the devices or the power supply of a main loop breaks down, the dual power switching circuit can switch to the other main loop timely, so that the continuous power supply for motors is maintained and the stop of electronic devices such as high-voltage inverters caused by reports of overheating failure is prevented.

Description

A kind of dual power supply switching circuit and high voltage converter for blower fan power supply
Technical field
The utility model relates to frequency converter etc. with the electronic equipment of blower fan, relates in particular to a kind of dual power supply switching circuit and high voltage converter for blower fan power supply.
Background technology
High voltage converter is widely used on the key equipments such as water supply, heating, colliery and each class factory, the reliability of high voltage converter is directly connected to the normal operation of the people's livelihood and shop equipment, and have influence on a cooling system that key factor is exactly high voltage converter of high voltage converter reliability, current domestic high voltage converter major part all adopts centrifugal blower to dispel the heat, except the quality problems of centrifugal blower itself, the whether stable reliability that directly affects high voltage converter of the electric power system of centrifugal blower.Existing blower fan power supply circuits as shown in Figure 2; power end AC is connected to blower fan 1 by circuit breaker Q F and the contactor KM1 main contacts of connecting successively; during power supply; first close circuit breaker QF; make afterwards contactor KM1 coil power on, this contactor KM1 main contacts adhesive and make blower fan 1 running, wherein; circuit breaker Q F plays a protective role to these power supply circuits, the start/stop switch that contactor KM1 is these power supply circuits.In above-mentioned blower fan power supply circuits, if when a certain device wherein or power end AC break down, blower fan cannot normally power on, and then cause high voltage converter because reporting overheating fault to shut down.
Utility model content
The technical problems to be solved in the utility model is, in order to maintain blower fan, continues to power on and a kind of dual power supply switching circuit for blower fan power supply is provided.
A kind of dual power supply switching circuit for blower fan power supply, it includes the first circuit breaker, the second circuit breaker, the first contactor and the second contactor, wherein: the first circuit breaker, the first contactor main contacts, the second contactor main contacts and the second circuit breaker are connected between the first power end and second source end after connecting successively, and the voltage transmission of the junction of the first contactor main contacts and the second contactor main contacts is to blower fan; Circuit between the first circuit breaker and the first contactor main contacts is drawn the first phase line and the first zero line, and the second contactor normally-closed contact is connected between the first phase line and the first zero line after connecting with the first contactor coil; Circuit between the second circuit breaker and the second contactor main contacts is drawn the second phase line and the second zero line, and the first contactor normally-closed contact is connected between the second phase line and the second zero line after connecting with the second contactor coil.
Preferably, also include the 3rd contactor, the voltage of the junction of the first contactor main contacts and the second contactor main contacts transfers to blower fan by the 3rd contactor main contacts.
Preferably, also include auxiliary relay, arbitrary phase line is drawn in the junction of the first circuit breaker and the first contactor main contacts, and this phase line and the first zero line are connected respectively the two ends of auxiliary relay coil, auxiliary relay normally opened contact is connected with the first contactor coil, and auxiliary relay normally-closed contact is connected with the second contactor coil.
Preferably, also include auxiliary relay, arbitrary phase line is drawn in the junction of the first circuit breaker and the first contactor main contacts, and this phase line and the first zero line are connected respectively the two ends of auxiliary relay coil, auxiliary relay normally opened contact is connected with the second contactor coil, and auxiliary relay normally-closed contact is connected with the first contactor coil.
A high voltage converter, it includes the first power end, second source end, blower fan and the above-mentioned dual power supply switching circuit for blower fan power supply.
Preferably, blower fan is a plurality of, and a plurality of blower fans are parallel with one another.
Preferably, also include phase shifting transformer, the first circuit breaker is connected in the first power end, and the first power end is civil power output, and the second circuit breaker is connected in second source end, and second source end is phase shifting transformer output.
The disclosed dual power supply switching circuit for blower fan power supply of the utility model, the first power end, the first circuit breaker, the first contactor and blower fan form a major loop, second source end, the second circuit breaker, the second contactor and blower fan form another major loop simultaneously, recycling the first contactor and the second contactor interlocks two major loops, when the first contactor coil powers on, its normally closed electric shock disconnects, make the second contactor coil dead electricity and make its main contacts disconnect, by the first power end, blower fan is powered; Similarly, when the second contactor coil powers on, its normally closed electric shock disconnects, and the first contactor coil dead electricity and make its main contacts disconnect is powered to blower fan by second source end.Under the effect of above-mentioned the first contactor and the second contactor; when the device of one of them major loop or power supply break down; can switch in time another major loop, thereby maintain blower fan continued power, avoid the electronic equipments such as high voltage converter because reporting overheating fault to shut down.
Accompanying drawing explanation
Fig. 1 is that the utility model is for the schematic diagram of the dual power supply switching circuit of blower fan power supply.
Fig. 2 is existing blower fan power supply circuits schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in more detail.
The invention discloses a kind of dual power supply switching circuit for blower fan power supply, as shown in Figure 1, it includes the first circuit breaker Q F1, the second circuit breaker Q F2, the first contactor KM1 and the second contactor KM2, wherein, the first circuit breaker Q F1, the first contactor KM1 main contacts, after connecting successively, the second contactor KM2 main contacts and the second circuit breaker Q F2 be connected between the first power end AC1 and second source end AC2, the voltage transmission of the junction of the first contactor KM1 main contacts and the second contactor KM2 main contacts is to blower fan 1, make the first power end AC1, the first circuit breaker Q F1, the first contactor KM1 and blower fan 1 form a major loop, while second source end AC1, the second circuit breaker Q F2, the second contactor KM2 and blower fan 1 form another major loop, in addition, also comprise two control loops:
One, the circuit between the first circuit breaker Q F1 and the first contactor KM1 main contacts is drawn the first phase line and the first zero line, and the second contactor KM2 normally-closed contact is connected between the first phase line and the first zero line after connecting with the first contactor KM1 coil;
Circuit between its two, the second circuit breaker Q F2 and the second contactor KM2 main contacts is drawn the second phase line and the second zero line, and the first contactor KM1 normally-closed contact is connected between the second phase line and the second zero line after connecting with the second contactor KM2 coil.
In above-mentioned dual power supply switching circuit, by the first contactor KM1 and the second contactor KM2, two major loops are interlocked, when the first contactor KM1 coil powers on, its normally closed electric shock disconnects, make the second contactor KM2 coil losing electricity and make its main contacts disconnect, by the first power end AC1, blower fan 1 is powered; Similarly, when the second contactor KM2 coil powers on, its normally closed electric shock disconnects, the first contactor KM1 coil losing electricity and make its main contacts disconnect, by second source end AC2 to blower fan 1 power supply.Under the effect of above-mentioned two control loops, when the device of a major loop or power supply break down, can switch in time another major loop, thereby maintain blower fan 1 continued power.
As a kind of optimal way, also include the 3rd contactor KM3, the voltage of the junction of the first contactor KM1 main contacts and the second contactor KM2 main contacts transfers to blower fan 1 by the 3rd contactor KM3 main contacts, the 3rd contactor KM3 is as start/stop switch, and then the convenient power-up state of controlling blower fan 1.
When this dual power supply switching circuit is applied to high voltage converter, above-mentioned the first power end AC1 is civil power output and using as main power source, second source end AC2 is phase shifting transformer output and using as stand-by power supply, so, the first power end AC1 is preferably blower fan 1 power supply, further, this first power end AC1 is used for accessing 380V power supply, and second source end AC2 is for accessing the 380V power supply of phase shifting transformer tertiary winding output.In order to realize the priority of two power supplys, control, this dual power supply switching circuit also includes auxiliary relay KA1, arbitrary phase line is drawn in the junction of the first circuit breaker Q F1 and the first contactor KM1 main contacts, and this phase line and the first zero line are connected respectively the two ends of auxiliary relay KA1 coil, auxiliary relay KA1 normally opened contact is connected with the first contactor KM1 coil, and auxiliary relay KA1 normally-closed contact is connected with the second contactor KM2 coil.After the first circuit breaker Q F1 closure, auxiliary relay KA1 coil powers on, its normally opened contact closure and normally-closed contact disconnect, making the first power end AC1 is blower fan 1 power supply, when the major loop of the first power end AC1, the first circuit breaker Q F1, the first contactor KM1 and blower fan 1 formation breaks down, the power down of auxiliary relay KA1 coil, its normally opened contact disconnects and normally-closed contact is closed, making second source end AC2 is blower fan 1 power supply, thereby maintaining on the basis of blower fan continued power, effectively realizing the priority of the first power end AC1 and second source end AC2 and controlled.But this is only a preferred embodiment of the present utility model, be not limited to the utility model, in another embodiment of the present utility model, auxiliary relay KA1 normally opened contact is connected with the second contactor KM2 coil, auxiliary relay KA1 normally-closed contact is connected with the first contactor KM1 coil, makes second source end AC2 preferentially to blower fan 1 power supply.
Above-mentioned dual power supply switching circuit can also be applied to other electronic equipments, particularly, this class of electronic devices includes the dual power supply switching circuit for blower fan power supply of the first power end AC1, second source end AC2, blower fan 1 and said structure, blower fan 1 wherein can be a plurality of, and a plurality of blower fans 1 are parallel with one another.
If this electronic equipment includes phase shifting transformer, preferably the first circuit breaker Q F1 is connected in to the first power end AC1, the first power end AC1 is civil power output and as main power source, the second circuit breaker Q F2 is connected in second source end AC2, and second source end AC2 is phase shifting transformer output and as stand-by power supply.
The disclosed dual power supply switching circuit for blower fan power supply of the utility model, for fear of the 380V power supply of civil power 380V power supply and phase shifting transformer tertiary winding output, access simultaneously and occur the situation of short circuit, in circuit, by the first contactor KM1 and the second contactor KM2, two-way power supply is interlocked, to ensure and to only have a road power supply fan to power, if a certain road power supply in two-way power supply breaks down, system can automatically switch to another road power supply, has so just guaranteed the continuity of Power supply; Meanwhile, utilize the 3rd contactor KM3 as start/stop switch, to control easily the power-up state of blower fan 1; In addition the priority of, utilizing auxiliary relay KA1 to realize the first power end AC1 and second source end AC2 is controlled.
More than the utility model preferred embodiment just, is not limited to the utility model, all modifications of making in technical scope of the present utility model, is equal to and replaces or improvement etc., all should be included in the scope that the utility model protects.

Claims (7)

1. for a dual power supply switching circuit for blower fan power supply, it is characterized in that, include the first circuit breaker (QF1), the second circuit breaker (QF2), the first contactor (KM1) and the second contactor (KM2), wherein:
The first circuit breaker (QF1), the first contactor (KM1) main contacts, the second contactor (KM2) main contacts and the second circuit breaker (QF2) are connected between the first power end (AC1) and second source end (AC2) after connecting successively, and the voltage transmission of the junction of described the first contactor (KM1) main contacts and the second contactor (KM2) main contacts is to blower fan (1);
Circuit between described the first circuit breaker (QF1) and the first contactor (KM1) main contacts is drawn the first phase line and the first zero line, and the second contactor (KM2) normally-closed contact is connected between the first phase line and the first zero line after connecting with the first contactor (KM1) coil;
Circuit between described the second circuit breaker (QF2) and the second contactor (KM2) main contacts is drawn the second phase line and the second zero line, and the first contactor (KM1) normally-closed contact is connected between the second phase line and the second zero line after connecting with the second contactor (KM2) coil.
2. the dual power supply switching circuit for blower fan power supply as claimed in claim 1, it is characterized in that, also include the 3rd contactor (KM3), the voltage of the junction of described the first contactor (KM1) main contacts and the second contactor (KM2) main contacts transfers to blower fan (1) by the 3rd contactor (KM3) main contacts.
3. the dual power supply switching circuit for blower fan power supply as claimed in claim 1, it is characterized in that, also include auxiliary relay (KA1), described the first circuit breaker (QF1) is drawn arbitrary phase line with the junction of the first contactor (KM1) main contacts, and this phase line and described the first zero line are connected respectively the two ends of auxiliary relay (KA1) coil, described auxiliary relay (KA1) normally opened contact is connected with the first contactor (KM1) coil, and described auxiliary relay (KA1) normally-closed contact is connected with the second contactor (KM2) coil.
4. the dual power supply switching circuit for blower fan power supply as claimed in claim 1, it is characterized in that, also include auxiliary relay (KA1), described the first circuit breaker (QF1) is drawn arbitrary phase line with the junction of the first contactor (KM1) main contacts, and this phase line and described the first zero line are connected respectively the two ends of auxiliary relay (KA1) coil, described auxiliary relay (KA1) normally opened contact is connected with the second contactor (KM2) coil, and described auxiliary relay (KA1) normally-closed contact is connected with the first contactor (KM1) coil.
5. a high voltage converter, is characterized in that, includes the arbitrary described dual power supply switching circuit for blower fan power supply of the first power end (AC1), second source end (AC2), blower fan (1) and claim 1 to 4.
6. high voltage converter as claimed in claim 5, is characterized in that, described blower fan (1) is a plurality of, and a plurality of blower fans (1) are parallel with one another.
7. high voltage converter as claimed in claim 5, it is characterized in that, also include phase shifting transformer, described the first circuit breaker (QF1) is connected in the first power end (AC1), described the first power end (AC1) is civil power output, described the second circuit breaker (QF2) is connected in second source end (AC2), and described second source end (AC2) is phase shifting transformer output.
CN201420159317.5U 2014-04-02 2014-04-02 A dual power switching circuit for fan power supply and a high-voltage inverter Active CN203774865U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420159317.5U CN203774865U (en) 2014-04-02 2014-04-02 A dual power switching circuit for fan power supply and a high-voltage inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420159317.5U CN203774865U (en) 2014-04-02 2014-04-02 A dual power switching circuit for fan power supply and a high-voltage inverter

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CN203774865U true CN203774865U (en) 2014-08-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066959A (en) * 2018-08-22 2018-12-21 四川川润液压润滑设备有限公司 A kind of control method of lubricating system exchange dual power supply contactor switching
CN111648993A (en) * 2020-06-10 2020-09-11 广东萨米特陶瓷有限公司 Control system and method for intelligent standby system of kiln fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066959A (en) * 2018-08-22 2018-12-21 四川川润液压润滑设备有限公司 A kind of control method of lubricating system exchange dual power supply contactor switching
CN111648993A (en) * 2020-06-10 2020-09-11 广东萨米特陶瓷有限公司 Control system and method for intelligent standby system of kiln fan

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