CN207782696U - A kind of variable-frequency motor transformation circuit with cooling blower - Google Patents
A kind of variable-frequency motor transformation circuit with cooling blower Download PDFInfo
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- CN207782696U CN207782696U CN201721429699.9U CN201721429699U CN207782696U CN 207782696 U CN207782696 U CN 207782696U CN 201721429699 U CN201721429699 U CN 201721429699U CN 207782696 U CN207782696 U CN 207782696U
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- cooling blower
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Abstract
The utility model discloses a kind of, and circuit is transformed in the variable-frequency motor with cooling blower, belongs to frequency changer circuit technical field.The variable-frequency motor transformation circuit with cooling blower includes the main power circuit being connected and frequency conversion main control circuit, the main power circuit includes motor power circuit, it further include cooling blower power circuit in the main power circuit, the cooling blower power circuit is connected in parallel with the motor power circuit, cooling blower control circuit is equipped in the frequency conversion main control circuit, the cooling blower control circuit is connect with the cooling blower power circuit；The main power circuit, frequency conversion main control circuit and cooling blower control circuit are set in a frequency conversion tank.The utility model realizes frequency conversion start and stop main motor interlocking start and stop cooling blower, and cooling blower independence power frequency operation, abundance of contributing reach good heat dissipation effect to motor at the low rotational speed.
Description
Technical field
The utility model is related to frequency changer circuit technical field, especially a kind of variable-frequency motor transformation electricity with cooling blower
Road.
Background technology
Power plant boiler seal fan and limestone slurry liquid pump are all important loads, and especially boiler seal wind turbine is to be related to
To a type load of unit safety stable operation.Common power frequency motor carries cooling blower and is arranged in motor tail portion, with main motor
Coaxially run with rotating speed.Motor main motor rotation speed of fan after energy-saving frequency conversion transformation must follow motor speed to rotate, in motor
Cooling blower rotating speed is low under the slow-speed of revolution, contributes small, heat dissipation effect is poor.Motor runs easily fever scaling loss under this operating mode.Motor exists
After energy-saving frequency conversion transformation, cooling blower rotating speed changes with the rotation speed change of motor, the main electrical scheme and control electricity of frequency changer circuit
Road schematic diagram is as shown in Fig. 1.I.e. cooling blower rotating speed is also relatively low therewith under the slow-speed of revolution after motor is in Frequency Conversion Modification, cooling wind
Machine output drop significantly impacts the heat dissipation effect of motor.And cooling blower start and stop state, real-time current, fault-signal etc.
Information can not monitor in real time in central station of floating dock, and automation, visualization are low, influence equipment safety stability.
Utility model content
The purpose of this utility model is to provide a kind of variable-frequency motor transformation circuit with cooling blower, has well solved change
Main motor rotation speed of fan must follow motor speed to rotate after frequency is transformed, the problem of heat dissipation effect difference under the slow-speed of revolution, realize frequency conversion
Start and stop main motor interlocks start and stop cooling blower, and cooling blower independence power frequency operation, abundance of contributing reach very motor at the low rotational speed
Good heat dissipation effect.And the information such as cooling blower start and stop state, real-time current, fault-signal feed back to distant place DCS, run people
Member monitors it in real time.Automation, visualization are high, and equipment safety stability is greatly improved.
In order to achieve the above objectives, technical solution used by the utility model is：
Circuit is transformed in a kind of variable-frequency motor with cooling blower, including the main power circuit and frequency conversion main control electricity being connected
Road, the main power circuit include motor power circuit, further include cooling blower power circuit, institute in the main power circuit
It states cooling blower power circuit to be connected in parallel with the motor power circuit, cooling blower is equipped in the frequency conversion main control circuit
Control circuit, the cooling blower control circuit pass through cable connection with the cooling blower power circuit；The main power source electricity
Road, frequency conversion main control circuit and cooling blower control circuit are set in a frequency conversion tank.
Further, the cooling blower power circuit includes the air switch, contactor and electrothermal relay being connected in series with,
The air switch is connect with the three phase mains in the main power circuit.
Further, the cooling blower control circuit includes contactor and interlock of fan start and stop relay, the wind turbine
The contact and the coil of the contactor for interlocking start and stop relay are connected in series with；The coil of the contactor also with the frequency conversion master
The power inleting terminal of control circuit connects, the contact of the interlock of fan start and stop relay also with the frequency conversion main control circuit
Power outlet end connects；The coil of the interlock of fan start and stop relay and the frequency converter operation of the frequency conversion main control circuit are anti-
Output module connection is presented, to receive the startup feedback signal of frequency converter.
Further, the cooling blower power circuit further includes current transformer, the current transformer and the heat
Relay is connected in series with, and the current transformer is connected with an Intelligent current measure and control device, the Intelligent current measure and control device
Leading-out terminal is connect with the input/output module in dcs in central station of floating dock.
Further, the frequency conversion main control circuit is connected with cooling blower run signal circuit by contactor, described
Cooling blower power circuit is connected with cooling blower fault signal circuit by electrothermal relay, and the cooling blower power circuit is logical
It crosses the current transformer and Intelligent current measure and control device is connected with cooling blower current signal circuit, the cooling blower operation
Signal circuit, cooling blower fault signal circuit and cooling blower current signal circuit in the dcs
Input/output module connects.
Further, the cooling blower run signal circuit includes the auxiliary contact of contactor, the contactor it is auxiliary
Contact is helped to be connect with the input/output module in the dcs, the cooling blower fault signal circuit includes heat
The contact of relay, the input/output module connection in the contact and dcs of the electrothermal relay；The cooling
Wind turbine current signal circuit includes the leading-out terminal of Intelligent current measure and control device, the leading-out terminal of the Intelligent current measure and control device
It is connect with the input/output module in dcs.
Further, radiator fan, the control circuit of the radiator fan and the cooling are additionally provided in the frequency conversion tank
Draught fan control circuit connects.
Further, the air switch is T3S250 air switches or TMA160 air switches.
Further, the model 50/1 of the current transformer, the model of the Intelligent current measure and control device
PA866K-80AI/M。
Further, the interlock of fan start and stop relay is MY4NJAC220V relays.
Due to the adoption of the above technical scheme, the utility model has the advantages that：
The utility model has well solved frequency conversion by adding cooling blower power circuit and cooling blower control circuit
The cooling blower of variable-frequency motor must follow variable-frequency motor to rotate after transformation, lead to the rotating speed of cooling blower and turning for variable-frequency motor
Fast identical, the problem of heat dissipation effect difference under the variable-frequency motor slow-speed of revolution realizes that frequency conversion start and stop main motor interlocks start and stop cooling blower, electricity
Cooling blower independence power frequency operation, abundance of contributing reach good heat dissipation effect, ensure motor safety and stability machine at the low rotational speed
Operation, it is significant, there is good practicability in actual production.And the utility model is also touched by adding contactor auxiliary
Point, electrothermal relay and Intelligent current measure and control device are long-range by signals such as cooling blower operating status, fault alarm and real-time currents
The input/output module being transported in dcs makes the signals such as cooling blower operating status, failure and real-time current
It can in real time be monitored in central station of floating dock, automation visualization is high, and equipment safety stability is greatly improved.
Description of the drawings
Fig. 1 is the main electrical scheme and control circuit schematic diagram of existing frequency changer circuit；
Fig. 2 is the schematic diagram that circuit is transformed in a kind of variable-frequency motor with cooling blower of the utility model；
Fig. 3 is the signal graph that circuit is transformed in a kind of variable-frequency motor with cooling blower of the utility model.
In figure, 1- frequency conversion main control circuits, 2- motor power circuits, 3 cooling blower power circuits, the control of 4- cooling blowers
Circuit, 5- cooling blower fault signal circuits, 6- cooling blower run signal circuits, 7- cooling blower current signal circuits, 8-
Control circuit of cooling fan.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it can be directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
Can be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
Embodiment
Such as Fig. 1-Fig. 3, a kind of variable-frequency motor transformation circuit with cooling blower, including the main power circuit being connected and change
Frequency main control circuit 1, the main power circuit include motor power circuit 2, further include cooling wind in the main power circuit
Electromechanical source circuit 3, the cooling blower power circuit 3 are connected in parallel with the motor power circuit 2, the frequency conversion main control electricity
Cooling blower control circuit 4 is equipped in road 1, the cooling blower control circuit 4 passes through with the cooling blower power circuit 3
Cable connection.The main power circuit, frequency conversion main control circuit 1 and cooling blower control circuit 4 of the utility model are set to
In one frequency conversion tank.
Further, in this embodiment the cooling blower power circuit 3 includes the air switch QF1 being connected in series with, connects
Tentaculum KM1 main contacts, electrothermal relay KH1 coils and current transformer TA1, the air switch QF1 and the main power circuit
In three phase mains connection, the current transformer TA1 is connected with an Intelligent current measure and control device, the Intelligent current observing and controlling dress
4-20mA leading-out terminals are set to connect with the input/output module in dcs in central station of floating dock.Intelligent current measure and control device
For showing cooling blower electric current on the spot, moreover it is possible to which the electric current of acquisition current transformer is sent to distribution by the channels 4-20mA in real time
Input/output module in control system.
In the present embodiment, current transformer TA1 primary current circuits pass through cooling blower power circuit 3, current transformer
TA1 secondary currents leading-out terminal is connect with Intelligent current measure and control device input terminal, and Intelligent current measure and control device ontology can be shown
Show cooling blower real-time current (earth-current is shown), Intelligent current measure and control device 4-20mA leading-out terminals and distributed AC servo system system
Input/output module connection in system, current signal can be sent to remote monitoring, accomplish that a distant place synchronizes standby current on the spot.
Further, in this embodiment the cooling blower control circuit 4 includes the coil for the contactor KM1 being connected in series with
With the contact of interlock of fan start and stop relay KA3, the power supply of the coil of the contactor KM1 and the frequency conversion main control circuit into
Line end connects, and the contact of the interlock of fan start and stop relay KA3 is connect with the power outlet end of the frequency conversion main control circuit,
The coil of the interlock of fan start and stop relay KA3 and the frequency converter operation feedback output module of the frequency conversion main control circuit connect
It connects, to receive the startup feedback signal of frequency converter.Interlock of fan start and stop relay KA3 is the startup feedback to frequency converter, is used for
It sends frequency converter enabling signal to cooling blower, it is allowed to start.I.e. interlock of fan start and stop relay KA3 feeds back to signal cold
But wind turbine.
Further, the utility model is in order to realize that the signals such as cooling blower operating status, failure and real-time current can be
Central station of floating dock can monitor in real time, and the frequency conversion main control circuit 1 is connected with cooling blower run signal electricity by the contactor KM1
Road 6, the cooling blower power circuit 3 is connected with cooling blower fault signal circuit 5 by the electrothermal relay KH1, described
Cooling blower power circuit 3 is connected with cooling blower electric current letter by the current transformer TA1 and Intelligent current measure and control device
Number circuit 7, the cooling blower run signal circuit 6, cooling blower fault signal circuit 5 and cooling blower current signal electricity
Road 7 is connect with the input/output module in the dcs.Wherein, the cooling blower run signal circuit 6
Include the auxiliary contact of contactor KM1, the auxiliary contact of the contactor KM1 and the input in the dcs are defeated
Go out module connection, the cooling blower fault signal circuit 5 includes the contact of electrothermal relay KH1, and the electrothermal relay KH1's touches
Point is connect with the input/output module in dcs.The cooling blower current signal circuit 7 includes Intelligent current
In measure and control device 4-20mA leading-out terminals, the Intelligent current measure and control device 4-20mA leading-out terminals and dcs
Input/output module connection.
Further, be additionally provided with radiator fan in frequency conversion tank described in the utility model, the control circuit of cooling fan 8 with
The cooling blower control circuit 4 connects.
Further, air switch QF1 described in the utility model is T3S250 air switches or TMA160 air switches, sheet
T3S250 air switches are selected as in embodiment.
Further, the model 50/1 of current transformer TA1 described in the utility model, the Intelligent current measure and control device
Model PA866K-80AI/M.
Further, interlock of fan start and stop relay KA3 described in the utility model is MY4NJAC220V relays.
Since cooling blower control circuit 4 is arranged in frequency conversion tank, it is incorporated to frequency conversion main control circuit 1, when frequency converter starts,
Interlock of fan start and stop relay KA3 coils charge, interlock of fan start and stop relay KA3 contact closures, contactor KM1 coil bands
Electricity, cooling blower control circuit 4 are connected, and contactor KM1 main contacts is caused to be closed, and cooling blower power circuit 3 charges, cooling wind
Machine is run.When frequency converter stops, interlock of fan start and stop relay coil KA3 dead electricity, the contacts interlock of fan start and stop relay KA3 are broken
It opens, contactor KM1 coil losing electricities, cooling blower control circuit 4 disconnects, and contactor KM1 main contacts is caused to disconnect, and cooling wind is electromechanical
3 dead electricity of source circuit, cooling blower stop.To realize that frequency conversion start and stop main motor interlocks start and stop cooling blower, motor is in the slow-speed of revolution
Lower cooling blower independence power frequency operation contributes sufficient, reaches good heat dissipation effect.
The utility model has well solved change by adding cooling blower power circuit 3 and cooling blower control circuit 4
After frequency is transformed the cooling blower of variable-frequency motor must follow variable-frequency motor to rotate, and lead to the rotating speed and variable-frequency motor of cooling blower
Rotating speed is identical, the problem of heat dissipation effect difference under the variable-frequency motor slow-speed of revolution, realizes that frequency conversion start and stop variable-frequency motor interlocks start and stop cooling wind
Machine, its cooling blower independence power frequency operation, abundance of contributing reach good heat dissipation effect, and this to variable-frequency motor at the low rotational speed
Cooling blower is also run shape by utility model by adding contactor auxiliary contact, electrothermal relay and Intelligent current measure and control device
The signals such as state, fault alarm and real-time current are remotely transported to the input/output module in dcs, make cooling wind
The signals such as machine operating status, failure and real-time current can in real time be monitored in central station of floating dock.The utility model automation, visualization journey
Degree is high, and equipment safety stability is greatly improved.And it is significant, there is good practicability in actual production.
Above description is the detailed description for the preferable possible embodiments of the utility model, but embodiment is not limited to
The patent claim of the utility model, the same changes or modifications completed under the technical spirit suggested by all the utility model
Change, should all belong to the covered the scope of the claims of the utility model.
Claims (10)
1. circuit is transformed in a kind of variable-frequency motor with cooling blower, including the main power circuit and frequency conversion main control electricity being connected
Road, the main power circuit include motor power circuit, it is characterised in that：Further include cooling blower in the main power circuit
Power circuit, the cooling blower power circuit are connected in parallel with the motor power circuit, in the frequency conversion main control circuit
Equipped with cooling blower control circuit, the cooling blower control circuit passes through cable connection with the cooling blower power circuit；
The main power circuit, frequency conversion main control circuit and cooling blower control circuit are set in a frequency conversion tank.
2. circuit is transformed in the variable-frequency motor according to claim 1 with cooling blower, it is characterised in that：The cooling blower
Power circuit includes the air switch, contactor and electrothermal relay being connected in series with, the air switch and the main power circuit
In three phase mains connection.
3. circuit is transformed in the variable-frequency motor according to claim 1 with cooling blower, it is characterised in that：The cooling blower
Control circuit includes contactor and interlock of fan start and stop relay, and the contact of the interlock of fan start and stop relay is contacted with described
The coil of device is connected in series with；The coil of the contactor is also connect with the power inleting terminal of the frequency conversion main control circuit, described
The contact of interlock of fan start and stop relay is also connect with the power outlet end of the frequency conversion main control circuit；The interlock of fan opens
The coil for stopping relay is connect with the frequency converter of frequency conversion main control circuit operation feedback output module, to receive frequency converter
Start feedback signal.
4. circuit is transformed in the variable-frequency motor according to claim 2 with cooling blower, it is characterised in that：The cooling blower
Power circuit further includes current transformer, and the current transformer is connected in series with the electrothermal relay, the current transformer
It is connected with an Intelligent current measure and control device, distributed AC servo system system in the leading-out terminal and central station of floating dock of the Intelligent current measure and control device
Input/output module connection in system.
5. circuit is transformed in the variable-frequency motor according to claim 4 with cooling blower, it is characterised in that：The frequency conversion master control
Circuit processed is connected with cooling blower run signal circuit by the contactor, and the cooling blower power circuit passes through the heat
Relay is connected with cooling blower fault signal circuit, and the cooling blower power circuit passes through the current transformer and intelligence
Electric current measure and control device is connected with cooling blower current signal circuit, the cooling blower run signal circuit, cooling blower failure
Signal circuit and cooling blower current signal circuit are connect with the input/output module in the dcs.
6. circuit is transformed in the variable-frequency motor according to claim 5 with cooling blower, it is characterised in that：The cooling blower
Run signal circuit includes the auxiliary contact of contactor, the auxiliary contact of the contactor in the dcs
Input/output module connects, and the cooling blower fault signal circuit includes the contact of electrothermal relay, and the electrothermal relay touches
Point is connect with the input/output module in dcs；The cooling blower current signal circuit includes that Intelligent current is surveyed
Control the leading-out terminal of device, the input and output mould in the leading-out terminal and dcs of the Intelligent current measure and control device
Block connects.
7. circuit is transformed in the variable-frequency motor according to claim 1 with cooling blower, it is characterised in that：In the frequency conversion tank
It is additionally provided with radiator fan, the control circuit of the radiator fan is connect with the cooling blower control circuit.
8. circuit is transformed in the variable-frequency motor according to claim 2 with cooling blower, it is characterised in that：The air switch
For T3S250 air switches or TMA160 air switches.
9. circuit is transformed in the variable-frequency motor according to claim 5 with cooling blower, it is characterised in that：The Current Mutual Inductance
The model 50/1 of device, the model PA866K-80AI/M of the Intelligent current measure and control device.
10. circuit is transformed in the variable-frequency motor according to claim 3 with cooling blower, it is characterised in that：The wind turbine connection
Lock start and stop relay is MY4NJAC220V relays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721429699.9U CN207782696U (en) | 2017-10-30 | 2017-10-30 | A kind of variable-frequency motor transformation circuit with cooling blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721429699.9U CN207782696U (en) | 2017-10-30 | 2017-10-30 | A kind of variable-frequency motor transformation circuit with cooling blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207782696U true CN207782696U (en) | 2018-08-28 |
Family
ID=63232500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721429699.9U Active CN207782696U (en) | 2017-10-30 | 2017-10-30 | A kind of variable-frequency motor transformation circuit with cooling blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207782696U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
-
2017
- 2017-10-30 CN CN201721429699.9U patent/CN207782696U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
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