CN204532785U - Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps - Google Patents
Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps Download PDFInfo
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- CN204532785U CN204532785U CN201520176809.XU CN201520176809U CN204532785U CN 204532785 U CN204532785 U CN 204532785U CN 201520176809 U CN201520176809 U CN 201520176809U CN 204532785 U CN204532785 U CN 204532785U
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- pump motor
- frequency
- solidifying pump
- frequency conversion
- conversion fan
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Abstract
The utility model discloses distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps, comprise solidifying pump motor, frequency variator and described solidifying pump motor are electrically connected, the side of described frequency variator is connected with inverter power switches, opposite side is connected with the first contactor, the main line of described solidifying pump motor is provided with solidifying pump motor power switch and the second contactor, the main line of described solidifying pump motor connects with frequency conversion fan circuit, and the main line of described solidifying pump motor, frequency variator and frequency conversion fan circuit all connect with control loop.Native system can energy saving, reduce cost of production, realize soft start, reduce electric power line voltage fluctuation, ensure the safe operation of motor and station service electrical system, and system is simple, it is convenient to control.
Description
Technical field
The utility model relates to cloth energy source station waste heat partial coagulation variable frequency control system of water pumps, relate to a kind of frequency by change Wechselstrommotor operating voltage and amplitude particularly, thus reach the level and smooth control system controlling AC electrical motor speed and torque, belong to power industry apparatus field.
Background technique
The electric motor amount of China accounts for 60% ~ 70% of national generating capacity, blower fan, pump equipment year power consumption account for 1/3 of national power consumption.Cause the main cause of this situation to be: the traditional speed regulating method of the equipment such as blower fan, water pump is baffle plate by regulating entrance or outlet, valve opening regulates to air quantity and confluent, a large amount of energy consumption of its output power at baffle plate, dam in process valve.Because blower fan, water pump class are mostly asquare torque load, air horsepower becomes cubic relationship with rotating speed, so when blower fan, pump rotary speed decline, the power consumed also declines greatly, therefore energy-saving potential is very large, the most effective conservation measures adopts variable-frequency governor to come adjust flux, air quantity exactly, application frequency variator power saving rate is 20% ~ 50%, and usually in the design, the Capacity Ratio actual demand of user's pump motor design exceeds a lot, there is the phenomenon of " low load with strong power ", inefficiency, causes a large amount of wastes of electric energy.Therefore a.c.frequency converting control remarkable benefit is promoted.In addition, in safety in production, condensate pump is distributed busbar protection waste heat part Important Auxiliary equipment, primary responsibility supplies water to oxygen-eliminating device and provides cooling water simultaneously, water control is bled, and non-return flap controls water, play a part very important in guarantee safety in production, and the traditional speed regulating method of the equipment such as water pump is by regulating the valve opening of entrance or outlet to regulate confluent, the a large amount of energy consumption of its output power is dammed in process at valve, loss is very large, and to causing very large damage the working life of motor, water pump, valve.Therefore the whether normal directly influential system safe operation of its work.
Therefore, the distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps of prior art need improve.
Summary of the invention
The utility model object is to provide a kind of distributed busbar protection waste heat partial coagulation pump variable frequency to control system, by use this service system can energy saving, reduce cost of production, realize soft start, reduce
electric powerline voltage fluctuates, ensures the safe operation of motor and station service electrical system.
To achieve these goals, the utility model provides following technological scheme:
Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps, comprise solidifying pump motor, frequency variator and described solidifying pump motor are electrically connected, the side of described frequency variator is connected with inverter power switches, opposite side is connected with the first contactor, the main line of described solidifying pump motor is provided with solidifying pump motor power switch and the second contactor, and the main line of described solidifying pump motor connects with frequency conversion fan circuit, and the main line of described solidifying pump motor, frequency variator and frequency conversion fan circuit all connect with control loop.
One as the utility model distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps is improved, described frequency conversion fan circuit comprises two frequency conversion fans, each frequency conversion fan is connected with frequency conversion fan contactor, two frequency conversion fan contactors all with frequency conversion fan power switch.
Another kind as the utility model distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps improves, and described solidifying pump motor is connected with current transformer, and this current transformer connects with electric motor protective device, and described electric motor protective device is connected to control loop; Electric motor protective device can realize monitoring in real time solidifying pump motor according to the measured value of current transformer.
As another improvement of the utility model distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps, described power switch is power supply air-break switch.
The utility model compared with prior art has following beneficial effect:
1, frequency control of motor speed is energy-conservation
After adopting frequency control of motor speed, energy-saving effect is the most obvious, power saving rate can reach 20% ~ 60%, this is because the power drain of blower fan water pump and the cube of rotating speed proportional, when the mean flowrate that user needs is less, the rotating speed of blower fan, water pump is lower, and its energy-saving effect is also very considerable, and traditional baffle plate and valve are when carrying out Flow-rate adjustment, power drain change is little.
2, realize soft start, ensure safe and stable operation
What under power frequency situation, motor adopted is star triangle step-down delayed startup, now electric current is 4-7 times of Rated motor electric current, this current value will greatly increase the electric stress of motor winding and produce heat thus the life-span of reduction motor, if the powerful motor of multiple stage starts in addition simultaneously, great impact will be caused to station service electrical system; After changing Frequency Converter Control into, motor can at zero-speed zero voltage start-up (certainly suitably can add torque magnification), and electric current is level and smooth without impacting, once the relation of frequency and voltage is set up
frequency variatorjust can carry out work according to V/F or the dynamic load of vector control mode band, decrease the impact of inrush current to motor and station service electrical system, the working life of motor can also be extended, reduce the maintenance cost of motor further.
3, convenient control, makes control system simplify
(1) frequency variator is easy to the forward and backward realizing motor;
(2) acceleration, deceleration time and frequency can regulate arbitrarily;
(3) frequency variator also has DC injection braking function, and when needing braking, frequency variator adds a VDC to motor, brakes, then without the need to separately adding brake control circuit;
(4) adjustable torque limit;
(5) controlled acceleration function;
(6) operation is more steady.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps;
Fig. 2 is control loop upper half part schematic diagram;
Fig. 3 is control loop lower half portion schematic diagram.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent.
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, be clearly and completely described the technological scheme in the utility model, obviously, described embodiment is only model utility part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, for the schematic diagram of the distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps of the utility model preferred embodiment, comprise solidifying pump motor 1, frequency variator 2 and described solidifying pump motor 1 are electrically connected, the side of described frequency variator 1 is connected with converter power supply air-break switch 3, opposite side is connected with the first contactor 4, the main line 100 of described solidifying pump motor is provided with solidifying pump motor power supply air-break switch 101 and the second contactor 102, the main line 100 of described solidifying pump motor connects with frequency conversion fan circuit 200, wherein frequency conversion fan circuit 200 comprises two frequency conversion fans 201, each frequency conversion fan 201 is connected with frequency conversion fan contactor 202, two frequency conversion fan contactors 202 all with frequency conversion fan power supply air-break switch 203, in order to carry out real-time monitoring and protection to solidifying pump motor 1, solidifying pump motor 1 is connected with current transformer 5, this current transformer 5 connects with electric motor protective device 6, wherein, the main line 100 of this solidifying pump motor, frequency variator 2, frequency conversion fan circuit 200 and electric motor protective device 6 all connect with control loop 300 described below.
Close converter power supply air-break switch 3; frequency variator 2 is started by the first contactor 4; close solidifying pump motor power supply air-break switch 101; solidifying pump motor 1 is started by the second contactor 102; close frequency conversion fan power supply air-break switch 203; start frequency conversion fan 201 by frequency conversion fan contactor 202, meanwhile, electric motor protective device 6 can realize monitoring in real time solidifying pump motor 1 according to the measured value of current transformer 5.
Control loop as shown in Figure 2, SA1 is the throw over switch of the controlling functions of a frequency-changing control system distant place/on the spot, operator send control start and stop instruction far away by DCS or coagulate pump motor 1 at local use button SB1 or button SB2 start and stop, all control commands are all carried out starting contactor by KA1 auxiliary reclay and are started solidifying pump motor 1, and wherein solidifying pump motor 1 can pass through SA2 power frequency/frequency conversion throw over switch selection control mode.Contactor KM1 coagulates pump motor 1 for controlling variable frequency starting, and contactor KM2 coagulates pump motor 1 for controlling power frequency startup, is generally VFC, as frequency variator 2 breaks down, then can start solidifying pump motor 1 by contactor KM2.Frequency variator 2 carries electric motor protecting function, the motor under protection converting operation state.Individual motor protective gear 6; motor under protection power frequency operation state; frequency variator 2 disconnects contactor KM1 or contactor KM2 by KA2 auxiliary reclay or electric motor protective device 6 by KA4 and cuts off solidifying pump motor 1 loop; two kinds of protections all can excise fault rapidly, reliably, accurately, guarantee the safe and stable operation of system.
Frequency conversion fan SF1 and SF2 can be realized automatically and Non-follow control by SA3 throw over switch; frequency conversion fan contactor KM3 and frequency conversion fan contactor KM4 starts frequency conversion fan SF1 and SF2 respectively, and the protection of two frequency conversion fans 201 is realized by thermorelay RF1 and RF2.LD2 is converting operation tutorial light, and LD3 is power frequency operation tutorial light, and LD1 is frequency conversion fan 201 fault indicating lamp, and when frequency conversion fan 201 breaks down, LD1 is lighted in KT1 time delay, notifies that operator's frequency conversion fan 201 breaks down.Frequency variator 2 carries remote transfer signal function, can upload running current, solidifying pump motor 1 running state, solidifying pump motor 1 fault state, frequency feedback information.
Claims (4)
1. distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps, comprise solidifying pump motor, it is characterized in that, frequency variator and described solidifying pump motor are electrically connected, the side of described frequency variator is connected with inverter power switches, opposite side is connected with the first contactor, the main line of described solidifying pump motor is provided with solidifying pump motor power switch and the second contactor, the main line of described solidifying pump motor connects with frequency conversion fan circuit, and the main line of described solidifying pump motor, frequency variator and frequency conversion fan circuit all connect with control loop.
2. distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps as claimed in claim 1, it is characterized in that, described frequency conversion fan circuit comprises two frequency conversion fans, and each frequency conversion fan is connected with frequency conversion fan contactor, two frequency conversion fan contactors all with frequency conversion fan power switch.
3. distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps as claimed in claim 1; it is characterized in that; described solidifying pump motor is connected with current transformer, and this current transformer connects with electric motor protective device, and described electric motor protective device is connected to control loop.
4. distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps as claimed in claim 1 or 2, it is characterized in that, described power switch is power supply air-break switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520176809.XU CN204532785U (en) | 2015-03-27 | 2015-03-27 | Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520176809.XU CN204532785U (en) | 2015-03-27 | 2015-03-27 | Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532785U true CN204532785U (en) | 2015-08-05 |
Family
ID=53746794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520176809.XU Expired - Fee Related CN204532785U (en) | 2015-03-27 | 2015-03-27 | Distributed busbar protection waste heat partial coagulation variable frequency control system of water pumps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204532785U (en) |
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2015
- 2015-03-27 CN CN201520176809.XU patent/CN204532785U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20210327 |