CN112145467A - Controllable fan reactive compensation frequency conversion starting drive of output amount of wind - Google Patents
Controllable fan reactive compensation frequency conversion starting drive of output amount of wind Download PDFInfo
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- CN112145467A CN112145467A CN202010915012.2A CN202010915012A CN112145467A CN 112145467 A CN112145467 A CN 112145467A CN 202010915012 A CN202010915012 A CN 202010915012A CN 112145467 A CN112145467 A CN 112145467A
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- 238000006243 chemical reaction Methods 0.000 title claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 47
- 229910052710 silicon Inorganic materials 0.000 claims description 47
- 239000010703 silicon Substances 0.000 claims description 47
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000001514 detection method Methods 0.000 claims description 14
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 230000001012 protector Effects 0.000 claims description 4
- 241001125929 Trisopterus luscus Species 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 abstract description 12
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000012549 training Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000003915 air pollution Methods 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002222 downregulating effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/007—Conjoint control of two or more different functions
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Abstract
The invention belongs to the technical field of fan reactive power compensation; the invention provides a reactive compensation variable frequency starting device of a fan with controllable output air quantity, which utilizes a starting controller to detect the equipment state and receive an air speed signal to adjust the output power of a variable frequency compensation output circuit, the output end of the variable frequency compensation output circuit is connected with a plurality of fan motors, the invention has strong applicability, stable air supply and simple operation, ensures the reasonable distribution of the air supply of the underground tunneling face, does not need to worry about other adverse factors brought to the underground working environment, greatly reduces the cost of training work and the cost of mine construction and mining, and is particularly suitable for the single-head tunneling working face with high requirement on the working environment.
Description
Technical Field
The invention relates to a fixed air volume fan starting technology, in particular to a fan reactive power compensation variable frequency starting device with controllable output air volume.
Background
The whole air supply rate in the pit is basically fixed, when the air supply rate of one working face is large, the air supply rate of the other working face is correspondingly reduced, and when the heading machine is heading a roadway, due to the fact that the heading machine is a single-head roadway, generated coal dust can be discharged only through the roadway which is heading, or dust is reduced on the spot. However, the existing air blowers for driving tunnels are all fans with fixed power, although the air blowers are divided into a first-level fan and a second-level fan, the air quantity supplied to a working face is large at first, gradually proper and then small. The air pollution problem is caused because the output power of the fan and the exhaust fan is unchanged, the fan cannot adjust the verified air supply along with the air resistance, and particularly, the air pollution is caused because the air resistance is small, the air quantity is large, the air speed is high when the working face starts tunneling, and coal dust is blown by wind and cannot be taken away by the exhaust fan in the tunneling process. In the later stage of the tunneling working face, due to the increase of the distance of the tunneling roadway, the wind resistance is increased, the wind quantity is reduced, the wind speed is reduced, the condition that the air pollution of the underground working environment cannot be treated due to the fact that coal dust generated in the tunneling process is difficult to be drawn away by an exhaust fan due to insufficient wind quantity is caused, and unreasonable distribution of the wind quantity of the tunneling face can cause unreasonable distribution of the wind quantity of the whole mine. Therefore, a brand new air supply device is needed to be invented to solve the problems of unreasonable distribution of the integral air supply amount in the underground and air pollution of the tunneling working face at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reactive power compensation variable frequency starting device of a fan with controllable output air volume, which solves the problem of purification of coal dust polluted air caused by unstable air supply volume on an underground coal mine tunneling working surface.
In order to achieve the purpose, the invention provides the following technical scheme:
a fan reactive compensation variable frequency starting device with controllable output air volume comprises an incoming line circuit, a starting controller N, a rectifying circuit and a variable frequency compensation output circuit, wherein the incoming line circuit is connected with a power supply to supply power to the starting controller N and supplies power to the variable frequency compensation output circuit through the rectifying circuit; the starting controller N detects the state of the equipment through three-phase current and voltage, receives a measured wind speed signal and adjusts the output power of the variable frequency compensation output circuit according to the wind speed signal; the output end of the frequency conversion compensation output circuit is connected with a plurality of fan motors in parallel, the rotating speed of the fan motors is controlled by adjusting the output power according to the required air supply amount, and the number of the fan motors needing to be started is adjusted.
Furthermore, the incoming line circuit is connected with an external power supply through an incoming line terminal X1, an incoming line terminal X2 and a proceeding terminal X3, and the three incoming line terminals are respectively connected with a normally open contact incoming line terminal of a three-phase contactor KM1 and a primary three-phase incoming line terminal of a transformer T through a switching switch QS and a fuse protector FU; a secondary three-phase outgoing line terminal of the transformer T is respectively connected with a detection terminal j1, a detection terminal j2 and a detection terminal j3 of the starting controller N, the secondary three-phase outgoing line terminal of the transformer T is connected with an incoming line rectifying circuit, two output ends of the incoming line rectifying circuit are connected with a capacitor C8, and an output end POUT serving as the incoming line circuit is correspondingly connected with a positive terminal and a negative terminal of a power supply of the starting controller N; a normally open contact outlet terminal of the three-phase contactor KM1 is correspondingly connected with a primary side inlet terminal of a current transformer CT 1; and a secondary side three-phase wire inlet end A1, a wire inlet end B1, a wire inlet end G1, a secondary side three-phase wire outlet end a1, a wire outlet end B1 and a wire outlet end G1 of the current transformer CT1 are all connected with a starting controller N.
Further, the starting controller N is connected with a speed sensor.
Furthermore, a wire inlet terminal U ', a wire inlet terminal V' and a wire inlet terminal W 'of the rectifying circuit are respectively connected with a primary side wire outlet terminal of the current transformer CT1, the wire inlet terminal U' is simultaneously connected with an anode of the thyristor VT1 'and a cathode of the thyristor VT 2', the wire inlet terminal V 'is simultaneously connected with an anode of the thyristor VT 3' and a cathode of the thyristor VT6 ', the wire inlet terminal W' is simultaneously connected with an anode of the thyristor VT5 'and a cathode of the thyristor VT 4', the common cathode of the controlled silicon VT1 ', the controlled silicon VT 3' and the controlled silicon VT5 'is connected, the common anode of the controlled silicon VT 2', the controlled silicon VT6 'and the controlled silicon VT 4' is connected, the control electrodes of six controlled silicon in the rectifying circuit are all connected with the starting controller N, the cathode of the controlled silicon VT1 'is connected with the anode of the controlled silicon VT 2' through a capacitor C7, and two ends of the capacitor C7 are used as the output end of the rectifying circuit and are connected with a line terminal F1 and a line terminal E1 of the variable-frequency compensation output circuit.
Furthermore, a wire terminal F1 of the variable frequency compensation output circuit is connected with the anode of a thyristor VT1, the common anode of the thyristor VT1, the thyristor VT3 and the thyristor VT5 is connected, the cathodes of the thyristor VT1 and the thyristor VT3 are connected through a capacitor C1, the cathodes of the thyristor VT3 and the thyristor VT5 are connected through a capacitor C3, the cathodes of the thyristor VT1 and the thyristor VT5 are connected through a capacitor C5, and the cathodes of the thyristor VT1, the thyristor VT3 and the thyristor VT5 are respectively connected with the anodes of a diode VD1, a diode VD3 and a diode VD 5; a wire terminal E1 is connected with the cathode of a thyristor VT4, the common cathodes of the thyristor VT4, the thyristor VT6 and the thyristor VT2 are connected, the anodes of the thyristor VT4 and the thyristor VT6 are connected through a capacitor C4, the anodes of the thyristor VT6 and the thyristor VT2 are connected through a capacitor C6, the anodes of the thyristor VT4 and the thyristor VT2 are connected through a capacitor C2, the anodes of the thyristor VT4, the thyristor VT6 and the thyristor VT2 are respectively connected with the cathodes of a diode VD4, a diode VD6 and a diode VD2, the cathode of the diode VD1 is connected with the anode of the diode VD4, the cathode of the diode VD4 is connected with the anode of the diode VD4, and the cathode of the diode VD4 is connected with the anode of; the three-phase wire inlet end of the power factor meter phi is respectively connected with the anodes of a diode VD1, a diode VD3 and a diode VD5, the three-phase wire outlet end of the power factor meter phi is respectively connected with three current transformers L4, the other ends of the three current transformers L4 are the wire outlet ends of a variable frequency compensation output circuit used for being connected with the fan motors, the current transformers L4 detect the current of the wire outlet ends, the three-phase wire outlet end of the power factor meter phi is connected with the normally open contact wire inlet end of the three-phase contactor KM through three current transformers L2, the wire outlet end of the variable frequency compensation output circuit is connected with the normally open contact wire inlet ends of a plurality of three-phase contactors KM2 in parallel, and the normally open contact wire outlet end of the three-phase contactor KM2 is; the normally open contact outlet end of the three-phase contactor KM is respectively connected with three bidirectional controlled silicon SCRs through three inductors L1, the three bidirectional controlled silicon SCRs are respectively connected with an inductor L3 through three capacitors C, and the other end of the inductor L3 is grounded; the control ends of six silicon controlled rectifiers and three bidirectional Silicon Controlled Rectifiers (SCR) in the frequency conversion compensation output circuit are connected with a starting controller N, and the compensation current is adjusted in real time through the starting controller N.
Further, the starting controller N is also connected with the three-phase contactor KM, the three-phase contactor KM1 and the three-phase contactor KM2, the switching states of the three-phase contactors are realized through the starting controller N, and the starting controller N realizes signal transmission and receives remote control through connection of RS485+ and RS 485-.
In conclusion, the invention has the following beneficial effects:
the invention can reasonably utilize the underground condition, realize the stable air supply of the driving face and the reasonable configuration of the underground integral air supply; the starter carries out reactive compensation according to the parameters input into the motor and the actual running condition, and reduces reactive current to the maximum extent; and judging whether the air duct has a large leak or not, and increasing the air supply quantity on one hand to ensure the air supply quantity of the working surface and sending an alarm signal by the starter on the other hand according to an operation result. The invention has accurate positioning, can be used on the well or underground, has strong applicability, stable air supply and simple operation, ensures the reasonable distribution of the air supply of the underground tunneling surface and does not need to worry about other adverse factors brought to the underground working environment. The invention has compact structure, reduces the occupied area, greatly reduces the cost of training work and the cost of mine construction and mining, and is particularly suitable for the single-head tunneling working face with high requirements on working environment.
Drawings
FIG. 1 is a schematic diagram of a line-in circuit;
FIG. 2 is a start-up controller;
FIG. 3 is a schematic diagram of a rectifier circuit;
fig. 4 is a schematic diagram of a frequency conversion compensation output circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the invention discloses a reactive power compensation variable frequency starting device of a fan with controllable output air volume, when wind resistance changes, the air supply volume of the fan keeps unchanged, and the device comprises an incoming line circuit, a starting controller N, a rectifying circuit and a variable frequency compensation output circuit, wherein the incoming line circuit is connected with a power supply to supply power for the starting controller N, and supplies power for the variable frequency compensation output circuit through the rectifying circuit; the starting controller N detects the state of the equipment through three-phase current and voltage, is connected with the speed sensor, receives a measured wind speed signal and adjusts the output power of the variable-frequency compensation output circuit according to the wind speed signal; the output end of the frequency conversion compensation output circuit is connected with a plurality of fan motors in parallel, the rotating speed of the fan motors is controlled by adjusting the output power according to the required air supply amount, and the number of the fan motors needing to be started is adjusted.
The incoming line circuit is connected with an external power supply through an incoming line terminal X1, an incoming line terminal X2 and a proceeding terminal X3, the three incoming line terminals are respectively connected with a normally open contact incoming line terminal of a three-phase contactor KM1 and a primary three-phase incoming line terminal of a transformer T through a switching switch QS and a fuse protector FU, and the external power supply is connected with the transformer T through the switching switch QS; the secondary three-phase outgoing line terminal of the transformer T is respectively connected with a detection terminal j1, a detection terminal j2 and a detection terminal j3 of the starting controller N, the secondary three-phase outgoing line terminal of the transformer T is connected with an incoming line rectifying circuit, two output ends of the incoming line rectifying circuit are connected with a capacitor C8, the capacitor C8 filters direct current, the output end POUT serving as the incoming line circuit is correspondingly connected with a positive terminal and a negative terminal of a power supply of the starting controller N, the power supply of the starting controller N is ensured to be stable, and the transformer T converts external voltage into low voltage for detection and provides the power supply for the starting controller; a normally open contact outlet terminal of the three-phase contactor KM1 is correspondingly connected with a primary side inlet terminal of the current transformer CT 1; a secondary side three-phase wire inlet end A1, a wire inlet end B1, a wire inlet end G1, a secondary side three-phase wire outlet end a1, a wire outlet end B1 and a wire outlet end G1 of the current transformer CT1 are all connected with a starting controller N, and the current transformer CT1 detects whether three-phase current is abnormal in real time.
An incoming line terminal U ', an incoming line terminal V' and an incoming line terminal W 'of the rectification circuit are respectively connected with an outgoing line terminal A, an outgoing line terminal B and an outgoing line terminal G of a current transformer CT1 on the primary side, the incoming line terminal U' is simultaneously connected with the anode of a thyristor VT1 'and the cathode of a thyristor VT 2', the incoming line terminal V 'is simultaneously connected with the anode of a thyristor VT 3' and the cathode of a thyristor VT6 ', the incoming line terminal W' is simultaneously connected with the anode of a thyristor VT5 'and the cathode of a thyristor VT 4', the thyristors VT1 ', the VT thyristor 3' and the thyristor VT5 'are connected in common cathode mode, the thyristors VT 2', the thyristor VT6 'and the thyristor VT 4' are connected in common anode mode, control electrodes of six thyristors in the rectification circuit are all connected with a start-up controller N, the start-up controller N is used for controlling on-off to realize voltage regulation, the cathode of the thyristor VT1 'and the anode of the thyristor VT 2' are connected through a capacitor C39, two ends of the capacitor C7 are used as output ends of the rectifying circuit to be connected with a line terminal F1 and a line terminal E1 of the variable-frequency compensation output circuit, and the capacitor C7 is used for filtering and stabilizing voltage.
A wire terminal F1 of the variable frequency compensation output circuit is connected with the anode of a controllable silicon VT1, a controllable silicon VT1, a controllable silicon VT3 and a controllable silicon VT5 are connected in a common anode mode, the cathodes of the controllable silicon VT1 and the controllable silicon VT3 are connected through a capacitor C1, the cathodes of the controllable silicon VT3 and the controllable silicon VT5 are connected through a capacitor C3, the cathodes of the controllable silicon VT1 and the controllable silicon VT5 are connected through a capacitor C5, and the cathodes of the controllable silicon VT1, the controllable silicon VT3 and the controllable silicon VT5 are respectively connected with the anode of a diode VD1, a diode VD3 and a diode VD 5; a wire incoming terminal E1 is connected with the cathode of a thyristor VT4, the common cathode of the thyristor VT4, the thyristor VT6 and the thyristor VT6 are connected, the anodes of the thyristor VT6 and the thyristor VT6 are connected through a capacitor C6, the anodes of the thyristor VT6 and the thyristor VT6 are connected with the cathodes of a diode VD6, a diode VD6 and a diode VD6 respectively, the cathode of the diode VD6 is connected with the anode of the diode VD6, the capacitor C6, the capacitor VD6 and the capacitor C6 are commutation capacitors, six diodes are isolation diodes, and the commutation capacitors are directly discharged through the motor; the three-phase wire inlet end of the power factor meter phi is respectively connected with the anodes of a diode VD1, a diode VD3 and a diode VD5, the three-phase wire outlet end of the power factor meter phi is respectively connected with three current transformers L4, the power factor meter phi detects the magnitude of a power factor and sends data to a starting controller N in real time, the other ends of the three current transformers L4 are wire outlet ends of a variable frequency compensation output circuit used for connecting a fan motor, the current transformer L4 detects the current of the wire outlet ends, namely detects whether a motor connected with the wire end runs or not and serves as a necessary condition for sending a starting compensation command, the three-phase wire outlet end of the power factor meter phi is connected with the normally open contact wire inlet end of a three-phase contactor KM through the three current transformers L2, the current transformer L2 is used for detecting the magnitude of the compensation current, the wire outlet end of the variable frequency compensation output circuit is connected with the, the normally open contact outlet end of the three-phase contactor KM2 is a spare outlet end of the frequency conversion compensation output circuit for connecting a plurality of fan motors, as shown in fig. 4, a connection principle diagram using two fan motors is shown, two groups of outlet ends are connected with two fan motors according to actual needs, if the air supply demand cannot be met, a plurality of three-phase contactors are connected in parallel at the outlet end of the frequency conversion compensation output circuit according to the connection mode of the three-phase contactor KM2 to serve as spare outlet ends; the normally open contact outlet end of the three-phase contactor KM is respectively connected with three bidirectional controllable silicon SCR through three inductors L1, harmonic waves are eliminated through an inductor L1, the three bidirectional controllable silicon SCR are all connected with an inductor L3 through three capacitors C, the other end of the inductor L3 is grounded, and the inductor L3 is used for eliminating overvoltage; the control ends of six silicon controlled rectifiers and three bidirectional Silicon Controlled Rectifiers (SCR) in the frequency conversion compensation output circuit are connected with a starting controller N, the six silicon controlled rectifiers in the frequency conversion compensation output circuit are controlled to be switched on and off through the starting controller N so as to realize the adjustment of frequency, and the three bidirectional silicon controlled rectifiers are controlled through the starting controller N so as to adjust the size of compensation current in real time; in the process of adjusting the output power by the variable-frequency compensation output circuit, the ratio of the voltage to the frequency of the fan motor is constant.
The starting controller N increases the voltage by increasing the conduction time of six silicon controlled rectifiers in the rectifying circuit, reduces the conduction time of six silicon controlled rectifiers in the frequency conversion compensation output circuit, increases the output frequency, increases the rotating speed of a fan motor, increases the wind speed and enables the output wind quantity of the fan to reach a set value; when the wind resistance continues to increase, if the second fan motor is not connected, an alarm can be given, if the second fan motor is connected, the output voltage and the frequency can be reduced, the three-phase contactor KM2 is controlled to be closed, and the wind resistance is readjusted according to the value of the wind speed sensor; when the starting operation process is carried out, the starting controller can control the three bidirectional thyristors to carry out reactive compensation according to the numerical values of the power factor meter phi, the current transformer L4 and the current transformer L2; the starting controller N is also connected with a three-phase contactor KM, a three-phase contactor KM1 and a three-phase contactor KM2, the switching states of the three-phase contactors are realized through the starting controller N, and the starting controller N realizes signal transmission and receives remote control through connection of RS485+ and RS 485-.
Setting of the starting controller N: an external power supply is connected with three incoming line terminals of an incoming line circuit, an outgoing line end of a variable frequency compensation output circuit is connected with a fan motor, a speed sensor is installed on a straight section inside an air duct, then the external power supply is connected, a switching switch QS is switched to a closed position, a fuse protector FU ensures normal work of the whole system, a starting controller N detects whether the balance of voltages of three detection terminals is within a normal range or not and currents of a secondary side three-phase incoming line end and a secondary side three-phase outgoing line end of a current transformer CT1, the three-phase currents are confirmed to be the same and zero when the machine is started, the controller N returns to an initial state, and according to the regulation of GB/T15543 and 2008 'imbalance of three-phase voltages of electric energy quality': the allowable value of the normal voltage unbalance degree of the common connection point of the power system is 2%, and meanwhile, the short-time unbalance degree is not more than 4%, so that the voltage balance can be considered to be in a normal range when the requirement is met. The number and parameters of the connected fan motors, the parameters (shape and size) of the wind barrel, the mounting position (distance from the wind barrel wall) of a speed sensor for measuring the wind speed, the wind quantity (determined according to the maximum possible working number of the working site) required by the working site or the parameters of the wind speed and the like are input into the starting controller N one by one through a setting button, an up-regulating button and a down-regulating button, if the total power of the connected fan motors is fully started and cannot meet the requirement of the required wind quantity, a parameter display screen on the starting controller N prompts that the parameters cannot be met, and the input parameters are confirmed, and the high-power external fan motor is replaced to meet the requirement of the wind quantity required by the working site.
Starting the self-test of the controller N: after setting and confirming no error, pressing the test button, and controlling the three-phase contactor KM1 and the three-phase contactor KM to be closed for the first time according to the voltage balance of the detection terminal j1, the detection terminal j2 and the detection terminal j3 and within a normal range, and controlling the control electrodes of six thyristors in the rectification circuit to ensure that the voltage of the outlet end of the variable frequency compensation output circuit returns to zero from zero to the rated voltage of the fan motor, and simultaneously controlling the control electrodes of the six thyristors in the variable frequency compensation output circuit to ensure that the frequency of the outlet end of the variable frequency compensation output circuit returns to zero from zero to the rated frequency of the fan motor; if the outlet end is only connected with one fan, the operation procedure is carried out twice, if two fans are connected, the three-phase contactor KM2 is closed during the second operation, the starting controller N judges according to the current, the voltage, the input parameters and the data generated by the first operation, whether the equipment is normal or not is confirmed by detecting whether the three-phase current and the voltage are the same or not, the speed sensor automatically tests the phase sequence problem of the connected fan motor, if the three-phase current and the voltage are not correct, the operation is automatically stopped after three minutes, the parameter screen displays that all the equipment are normal and can be put into use, and if the phase sequence is not correct, the error information and the scheme of how to correct the information are displayed in a rolling mode on the screen. After correction is requested, the test button is pressed again.
After the self-checking test is passed and the starting button is pressed to start the fan, the starting controller N changes the output power of the fan along with the change of the wind resistance according to the input parameters so as to ensure that the air supply quantity of the work site is not changed. When two fan motors are connected, the air volume of one motor reaches the maximum, and when the air volume requirement is difficult to meet, the starting controller N can automatically change the voltage and the frequency to be connected into the second fan motor, and then the controller N is adjusted according to the air velocity sensor, so that the air volume of a working site is kept unchanged. When the two fan motors are operated in full and cannot meet the air quantity requirement, the starting controller N can give an alarm under the condition of not stopping air. If the wind resistance is suddenly reduced in operation, the starting controller N considers that the wind cylinder is damaged, the output power is increased until the rated state of the connected fan motor is reached, and then the starter displays that the wind resistance is abnormal and gives an alarm.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. The utility model provides a controllable fan reactive compensation frequency conversion starting drive of output amount of wind which characterized in that: the power supply system comprises an incoming line circuit, a starting controller N, a rectifying circuit and a frequency conversion compensation output circuit, wherein the incoming line circuit is connected with a power supply to supply power for the starting controller N and supplies power for the frequency conversion compensation output circuit through the rectifying circuit;
the starting controller N detects the state of the equipment through three-phase current and voltage, receives a measured wind speed signal and adjusts the output power of the variable-frequency compensation output circuit according to the wind speed signal;
the output end of the frequency conversion compensation output circuit is connected with a plurality of fan motors in parallel, the rotating speed of the fan motors is controlled by adjusting the output power according to the required air supply amount, and the number of the fan motors needing to be started is adjusted.
2. The fan reactive compensation variable frequency starting device with controllable output air volume of claim 1, characterized in that: the incoming line circuit is connected with an external power supply through an incoming line terminal X1, an incoming line terminal X2 and a proceeding terminal X3, and the three incoming line terminals are respectively connected with a normally open contact incoming line terminal of a three-phase contactor KM1 and a primary three-phase incoming line terminal of a transformer T through a switching switch QS and a fuse protector FU; the secondary three-phase outgoing line terminal of the transformer T is respectively connected with a detection terminal j1, a detection terminal j2 and a detection terminal j3 of the starting controller N, the secondary three-phase outgoing line terminal of the transformer T is connected with an incoming line rectifying circuit, two output ends of the incoming line rectifying circuit are connected with a capacitor C8, and an output end POUT serving as the incoming line circuit is correspondingly connected with a positive terminal and a negative terminal of a power supply of the starting controller N; a normally open contact outlet terminal of the three-phase contactor KM1 is correspondingly connected with a primary side inlet terminal of a current transformer CT 1; and a secondary side three-phase wire inlet end A1, a wire inlet end B1, a wire inlet end G1, a secondary side three-phase wire outlet end a1, a wire outlet end B1 and a wire outlet end G1 of the current transformer CT1 are all connected with a starting controller N.
3. The fan reactive compensation variable frequency starting device with controllable output air volume of claim 1 or 2, characterized in that: the starting controller N is connected with a speed sensor.
4. The fan reactive compensation variable frequency starting device with controllable output air volume of claim 1, characterized in that: an incoming line terminal U ', an incoming line terminal V' and an incoming line terminal W 'of the rectifying circuit are respectively connected with a primary side outgoing line terminal of the current transformer CT1, the incoming line terminal U' is simultaneously connected with the anode of the thyristor VT1 'and the cathode of the thyristor VT 2', the incoming line terminal V 'is simultaneously connected with the anode of the thyristor VT 3' and the cathode of the thyristor VT6 ', the incoming line terminal W' is simultaneously connected with the anode of the thyristor VT5 'and the cathode of the thyristor VT 4', the common cathode of the controlled silicon VT1 ', the controlled silicon VT 3' and the controlled silicon VT5 'is connected, the common anode of the controlled silicon VT 2', the controlled silicon VT6 'and the controlled silicon VT 4' is connected, the control electrodes of six controlled silicon in the rectifying circuit are all connected with the starting controller N, the cathode of the controlled silicon VT1 'is connected with the anode of the controlled silicon VT 2' through a capacitor C7, and two ends of the capacitor C7 are used as the output end of the rectifying circuit and are connected with a line terminal F1 and a line terminal E1 of the variable-frequency compensation output circuit.
5. The fan reactive compensation variable frequency starting device with controllable output air volume of claim 1, characterized in that: a wire inlet terminal F1 of the frequency conversion compensation output circuit is connected with the anode of a thyristor VT1, a thyristor VT1, a thyristor VT3 and a thyristor VT5 are connected in a common anode mode, the cathodes of the thyristor VT1 and the thyristor VT3 are connected through a capacitor C1, the cathodes of the thyristor VT3 and the thyristor VT5 are connected through a capacitor C3, the cathodes of the thyristor VT1 and the thyristor VT5 are connected through a capacitor C5, and the cathodes of the thyristor VT1, the thyristor VT3 and the thyristor VT5 are respectively connected with the anodes of a diode VD1, a diode VD3 and a diode VD 5; a wire terminal E1 is connected with the cathode of a thyristor VT4, the common cathodes of the thyristor VT4, the thyristor VT6 and the thyristor VT2 are connected, the anodes of the thyristor VT4 and the thyristor VT6 are connected through a capacitor C4, the anodes of the thyristor VT6 and the thyristor VT2 are connected through a capacitor C6, the anodes of the thyristor VT4 and the thyristor VT2 are connected through a capacitor C2, the anodes of the thyristor VT4, the thyristor VT6 and the thyristor VT2 are respectively connected with the cathodes of a diode VD4, a diode VD6 and a diode VD2, the cathode of the diode VD1 is connected with the anode of the diode VD4, the cathode of the diode VD4 is connected with the anode of the diode VD4, and the cathode of the diode VD4 is connected with the anode of; the three-phase wire inlet end of the power factor meter phi is respectively connected with the anodes of a diode VD1, a diode VD3 and a diode VD5, the three-phase wire outlet end of the power factor meter phi is respectively connected with three current transformers L4, the other ends of the three current transformers L4 are the wire outlet ends of a variable frequency compensation output circuit used for being connected with the fan motors, the current transformers L4 detect the current of the wire outlet ends, the three-phase wire outlet end of the power factor meter phi is connected with the normally open contact wire inlet end of the three-phase contactor KM through three current transformers L2, the wire outlet end of the variable frequency compensation output circuit is connected with the normally open contact wire inlet ends of a plurality of three-phase contactors KM2 in parallel, and the normally open contact wire outlet end of the three-phase contactor KM2 is;
the normally open contact outlet end of the three-phase contactor KM is respectively connected with three bidirectional controlled silicon SCRs through three inductors L1, the three bidirectional controlled silicon SCRs are respectively connected with an inductor L3 through three capacitors C, and the other end of the inductor L3 is grounded; the control ends of six silicon controlled rectifiers and three bidirectional Silicon Controlled Rectifiers (SCR) in the frequency conversion compensation output circuit are connected with a starting controller N, and the compensation current is adjusted in real time through the starting controller N.
6. The fan reactive compensation variable frequency starting device with controllable output air volume of claim 1, characterized in that: the starting controller N is also connected with a three-phase contactor KM, a three-phase contactor KM1 and a three-phase contactor KM2, the switching states of the three-phase contactors are realized through the starting controller N, and the starting controller N realizes signal transmission and receives remote control through connection of RS485+ and RS 485-.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915012.2A CN112145467A (en) | 2020-09-03 | 2020-09-03 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915012.2A CN112145467A (en) | 2020-09-03 | 2020-09-03 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
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| CN112145467A true CN112145467A (en) | 2020-12-29 |
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| CN109104135A (en) * | 2018-08-31 | 2018-12-28 | 史隰明 | A kind of motor reactive power compensation frequency changer circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202068375U (en) * | 2011-05-18 | 2011-12-07 | 葛音 | Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller |
| CN202084928U (en) * | 2011-06-10 | 2011-12-21 | 上海雷诺尔电力自动化有限公司 | Hybrid compensation filtering cabinet |
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Application publication date: 20201229 |