CN202206300U - Mine explosion-proof type high-voltage frequency converter - Google Patents
Mine explosion-proof type high-voltage frequency converter Download PDFInfo
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- CN202206300U CN202206300U CN2011203433567U CN201120343356U CN202206300U CN 202206300 U CN202206300 U CN 202206300U CN 2011203433567 U CN2011203433567 U CN 2011203433567U CN 201120343356 U CN201120343356 U CN 201120343356U CN 202206300 U CN202206300 U CN 202206300U
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Abstract
The utility model discloses a mine explosion-proof type high-voltage frequency converter which comprises a phase-shifting transformer unit explosion-proof case and a power unit explosion-proof case, wherein the phase-shifting transformer unit explosion-proof case is internally provided with a phase-shifting isolation transformer and a radiating system, and the power unit explosion-proof case is internally provided with multiple groups of power units connected in series, a control unit and a radiating system; a high-voltage side of the phase-shifting isolation transformer is connected in a three-phase high-voltage power grid in series, the multiple groups of power units connected in series are respectively connected with a low-voltage side of the phase-shifting isolation transformer, and the power units are connected with the control unit by an optical fiber. Due to the arrangement of sealing structures of all assembling and combining surfaces of the phase-shifting transformer unit explosion-proof case and the power unit explosion-proof case, the mine explosion-proof type high-voltage frequency converter can be isolated from outside, and corresponding chain explosions in high-crisis occasions similar to mines and the like can be avoided, so that the explosion-proof effect is good; the control signals are transmitted by the optical fiber, therefore, the mine explosion-proof type high-voltage frequency converter has both high electricity-proof capacity and high anti-electromagnetic interference performance.
Description
Technical field
The utility model relates to high voltage converter, specifically relates to a kind of flame-proof mine high voltage converter.
Background technology
At present, in some high-risk occasions, often need to use high power motor like colliery, chemical plant, oil plant etc.And high power motor is very low in during starts power factor, and voltage fluctuation is obvious, and this will cause very big harm to electrical network.Such destruction can be reduced the operational efficiency of other power equipment on the electrical network, reduces the useful life of equipment; Secondly, when transient voltage occurs, can make motor produce vibrations, noise and too much heat.Equally, the surge that transition produces can make the power consumption efficiency of electrical network seriously descend, and the current loss of inductive load increases.
Development and automation along with modern power electronic; The raising of intelligent degree; Adopt high voltage converter that high power load is carried out the speed control in starting process, the speed regulation process; To improving technology, improving the quality of products beneficially, being again energy-conservation and the requirement equipment economical operation not only, is the inexorable trend of sustainable development.Therefore, frequency control is with its high efficiency, High Power Factor, and excellent speed governing and open plurality of advantages such as braking ability and be known as the most rising control mode both at home and abroad.
But the high voltage converter of prior art does not all have the mine explosion-suppression function, can not be applied to like high-risk places such as colliery, oil, chemical industry.
Summary of the invention
To above-mentioned situation, the utility model provides a kind of flame-proof mine high voltage converter, with the high voltage converter that solves prior art because of not having the problem that the flame proof function can not be applied to high-risk places such as colliery, oil, chemical industry.
To achieve these goals, the technical scheme of the utility model is following:
The flame-proof mine high voltage converter is characterized in that, comprises a phase shifting transformer unit Flameproof box, a power cell Flameproof box, a cooling recirculation system Flameproof box and a radiator; Be provided with a phase shift isolating transformer and a cover cooling system in the said phase shifting transformer unit Flameproof box, be provided with power cell and a control unit and a cover cooling system of many group series connection in the said power cell Flameproof box;
A cover cooling system that is provided with in the said phase shifting transformer unit Flameproof box is connected with said cooling recirculation system Flameproof box; A cover cooling system that is provided with in the said power cell Flameproof box also is connected with said cooling recirculation system Flameproof box; Said cooling recirculation system Flameproof box is connected with said radiator;
The high-pressure side of said phase shift isolating transformer is connected in the three-phase high-voltage electrical network, and the power cells of said many group series connection are connected with the low-pressure side of phase shift isolating transformer respectively, is connected through optical fiber between said power cell and the control unit.
Further, a cover cooling system that is provided with in a cover cooling system that is provided with in said cooling recirculation system Flameproof box and the phase shifting transformer unit Flameproof box, the power cell Flameproof box and the connecting tube between the radiator are metal tube.
Further; Said each group power cell is tri-level single and exports mutually; Separate, the mutual isolation of each secondary winding for the low-pressure side of the phase shift isolating transformer of each power cell power supply; Corresponding one by one mutually with the tri-level single of each power cell, link together, what make that the power cells of many group series connection finally form the Y-connection mode provides the High Level AC Voltage of variable ratio frequency changer transformation for high-tension motor.
Further; Said control unit comprises a man-machine interactive interface; Said man-machine interactive interface is connected with the CPU element of two DSP, and the CPU element of said couple of DSP also connects a phased control unit, and said phased control unit also connects a PWM controller; Said PWM controller comprises an electric to optic converter, and the power cell of said many group series connection is connected with the light-receiving port through the corresponding light transmit port of two optical fiber and the electric to optic converter of PWM controller respectively.
Further, said each group power cell comprises a power cell control board respectively, and the light transmit port of said electric to optic converter connects the input of the inner control signal treatment circuit of power cell control board; The output of said control signal treatment circuit connects the inner IGBT of power cell control board and the input of SCR trigger module, and said IGBT and SCR trigger module also are provided with the feedback information end that sends feedback information to power cell; The light-receiving port of said electric to optic converter connects the output of the inner answer signal treatment circuit of power cell control board, and said answer signal treatment circuit also is provided with the input of the state information that reception sent by power cell.
Further, the group number of the power cell of said many group series connection is five groups; The voltage magnitude of said every group of power cell output is ± impulse waveform of 693.5V, and the pulse between the adjacent power unit differs 1/5 switch periods in time.
Further, said phased control unit is a CPLD FPGA programmable module.
Further, the CPU element of said couple of DSP is the CPU element of two 32 bit DSPs.
Further; Said phase shifting transformer unit Flameproof box comprises the wire connection cavity of an explosion-proof chamber and this explosion-proof chamber one side; A said phase shift isolating transformer and a cover cooling system are arranged in the explosion-proof chamber; Said cooling system be positioned over explosion-proof chamber with the non-conterminous internal chamber wall of wire connection cavity before; Chamber wall between said wire connection cavity and the explosion-proof chamber is provided with a plurality of be used to the connect major loop of phase shift isolating transformer and power supply and the binding posts of the power cell that many groups are connected, and is provided with hermetically-sealed construction between said binding post and the chamber wall; All places of being fitted to each other of other of said explosion-proof chamber are provided with hermetically-sealed construction; All are fitted to each other other of said wire connection cavity face and also are provided with hermetically-sealed construction.
Further; Said power cell Flameproof box also comprises the wire connection cavity of an explosion-proof chamber and this explosion-proof chamber one side; The power cell of said many group series connection and the control unit that is attached thereto and a cover cooling system all are arranged in the explosion-proof chamber; Said cooling system be positioned over explosion-proof chamber with the non-conterminous internal chamber wall of wire connection cavity before; The binding post that chamber wall between said wire connection cavity and the explosion-proof chamber is provided with a plurality of power cells that are used to connect many group series connection and phase shift isolating transformer is the binding post that high-tension motor provides the High Level AC Voltage of variable ratio frequency changer transformation with organizing the power cell of connecting more, is provided with hermetically-sealed construction between said binding post and the chamber wall; All places of being fitted to each other of other of said explosion-proof chamber are provided with hermetically-sealed construction, and all are fitted to each other other of said wire connection cavity face and also are provided with hermetically-sealed construction.
The beneficial effect of the utility model is that the setting of the hermetically-sealed construction of the face that respectively is fitted to each other of phase shifting transformer unit Flameproof box and power cell Flameproof box is isolated external environment and its each other, therefore is independent of each other; When the inside cavity of phase shifting transformer unit Flameproof box or power cell Flameproof box flammable mixtures occurs and blasts; Can not have influence on another casing and the external world; Thereby avoid this high-risk occasions such as similar colliery that corresponding chain explosion takes place, explosion-proof effect is good.
In addition, the utility model adopts many level topological structure of multiple-pulse rectification, multipleization PWM, units in series stack, has the characteristics of High Power Factor, low harmonic pollution, and the input and output current waveform is all near sinusoidal wave.Power cell is connected through optical fiber with control unit, and control signal transmits through optical fiber, and existing high electric isolating power has high anti-electromagnetic interference performance again.The topological structure of all power cell, circuit is identical in the utility model same model frequency converter, and this has made things convenient for replacing, in the future maintenance brings quick and convenient.
Description of drawings
Fig. 1 looks sketch map for the phase shifting transformer unit Flameproof box mounted inside master of the utility model flame-proof mine high voltage converter.
Fig. 2 is the phase shifting transformer unit Flameproof box mounted inside schematic side view of the utility model flame-proof mine high voltage converter.
Fig. 3 looks sketch map for the power cell Flameproof box mounted inside master of the utility model flame-proof mine high voltage converter.
Fig. 4 is the power cell Flameproof box mounted inside schematic side view of the utility model flame-proof mine high voltage converter.
Fig. 5 is that the pipeline of the cooling recirculation system of the utility model flame-proof mine high voltage converter connects sketch map.
Fig. 6 is the electrical principle sketch map of the utility model flame-proof mine high voltage converter.
Fig. 7 is the workflow sketch map of the utility model flame-proof mine high voltage converter.
Fig. 8 is the operation principle sketch map of the power cell of the utility model flame-proof mine high voltage converter.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the flame-proof mine high voltage converter comprises a phase shifting transformer unit Flameproof box 100, a power cell Flameproof box 200, a cooling recirculation system Flameproof box 300 and a radiator 400; Be provided with a phase shift isolating transformer 110 and a cover cooling system 120 in the said phase shifting transformer unit Flameproof box 100, be provided with power cell 210 and a control unit 220 and a cover cooling system 230 of many group series connection in the said power cell Flameproof box 200.
A cover cooling system 120 that is provided with in the said phase shifting transformer unit Flameproof box 100 is connected with said cooling recirculation system Flameproof box 300; A cover cooling system 230 that is provided with in the said power cell Flameproof box 200 also is connected with said cooling recirculation system Flameproof box 300; Said cooling recirculation system Flameproof box 300 is connected with said radiator 400; A cover cooling system 230 that is provided with in a cover cooling system 120 that is provided with in said cooling recirculation system Flameproof box 300 and the phase shifting transformer unit Flameproof box 100, the power cell Flameproof box 200 and the connecting tube between the radiator 400 are metal tube.
Wherein, Said phase shifting transformer unit Flameproof box 100 comprises the wire connection cavity 102 of an explosion-proof chamber 101 and this explosion-proof chamber one side; A said phase shift isolating transformer 110 and a cover cooling system 120 are arranged in the explosion-proof chamber 101; Said cooling system 120 be positioned over explosion-proof chamber 101 with the non-conterminous internal chamber wall of wire connection cavity before; Chamber wall between said wire connection cavity 102 and the explosion-proof chamber 101 is provided with a plurality of be used to the connect major loop of phase shift isolating transformer 110 and power supply and the binding posts 301 of the power cell 210 that many groups are connected, and is provided with hermetically-sealed construction between said binding post 301 and the chamber wall; Other all places of being fitted to each other of said explosion-proof chamber 101 are provided with hermetically-sealed construction; All are fitted to each other other of said wire connection cavity 102 face and also are provided with hermetically-sealed construction.
Said power cell Flameproof box 200 also comprises the wire connection cavity 202 of an explosion-proof chamber 201 and this explosion-proof chamber one side; The power cell 210 of said many group series connection and the control unit 220 that is attached thereto and a cover cooling system 230 all are arranged in the explosion-proof chamber 201; Said cooling system 230 be positioned over explosion-proof chamber 201 with the non-conterminous internal chamber wall of wire connection cavity before; The binding post that chamber wall between said wire connection cavity 202 and the explosion-proof chamber 201 is provided with a plurality of power cells 210 that are used to connect many group series connection and phase shift isolating transformer 110 with organize the power cell 210 of connecting for high-tension motor provides the binding post of the High Level AC Voltage of variable ratio frequency changer transformation more, be provided with hermetically-sealed construction between said binding post 302 and the chamber wall; Other all places of being fitted to each other of said explosion-proof chamber 201 are provided with hermetically-sealed construction, and all are fitted to each other other of said wire connection cavity 202 face and also are provided with hermetically-sealed construction.
Referring to Fig. 5; The high-pressure side of said phase shift isolating transformer 110 is connected in the major loop (being the three-phase high-voltage electrical network) of power supply; The power cell 210 of said many group series connection is connected with the low-pressure side of phase shift isolating transformer 110 respectively, is connected through optical fiber between said power cell 210 and the control unit 220.
Said each group power cell 210 is tri-level single and exports mutually; Separate, the mutual isolation of each secondary winding for the low-pressure side of the phase shift isolating transformer 110 of each power cell 210 power supplies; Corresponding one by one mutually with the tri-level single of each power cell 210, link together, make the power cells 210 of many group series connection final form the Y-connection modes the High Level AC Voltage of variable ratio frequency changer transformation is provided for high-tension motor.
Referring to Fig. 5, Fig. 6; Said control unit 220 comprises a man-machine interactive interface 221; Said man-machine interactive interface 221 is connected with the CPU element 222 of two DSP; The CPU element 222 of said couple of DSP also connects a phased control unit 223; Said phased control unit 223 also connects a PWM controller 224, and said PWM controller 224 comprises an electric to optic converter 225, and the power cell 210 of said many group series connection is connected with the light-receiving port with the electric to optic converter 225 corresponding light transmit ports of PWM controller 224 through two optical fiber respectively.
Referring to Fig. 6, Fig. 7; Said each group power cell 210 comprises a power cell control board 211 respectively; The light transmit port of said electric to optic converter 225 connects the input of its inner control signal treatment circuit 211a; The output of said control signal treatment circuit 211a connects its inner IGBT and SCR trigger input; The trigger output of said IGBT and SCR sends feedback information to power cell 210, and the light-receiving port of said electric to optic converter 225 connects the output of its inner answer signal treatment circuit 211b, and the input of said answer signal treatment circuit 211b receives the state information of being sent by power cell 210.
Embodiment one
The group number of getting the power cell 210 of said many group series connection is five groups, and electric power loop is the High Level AC Voltage of 6000V.The voltage magnitude of then setting 210 outputs of said every group of power cell is the impulse waveform of ± 693.5V, and the pulse between the adjacent power unit differs 1/5 switch periods in time.Said phased control unit 223 is a CPLD FPGA programmable module.The CPU element 222 of said couple of DSP is the CPU element of two 32 bit DSPs.
Then the operation principle of the utility model is following: three-phase high-voltage gets into the high-pressure side of the phase shift isolating transformer 110 of the utility model through switch; Through 110 step-downs of phase shift isolating transformer, phase shift, by the low-pressure side supply power unit 210 of phase shift isolating transformer 110.The output of the three-phase of every adjacent power unit of 5 groups of power cells 210 head and the tail is respectively gone here and there mutually, and making and finally forming the Y-connection mode between the three-phase is the High Level AC Voltage that high-tension motor provides the variable ratio frequency changer transformation.
All adopted two optical fiber to be connected between control unit 220 and the every group of power cell 210 and controlled.It can receive operational order and given signal from man-machine interactive interface 221, I/O interface or communication port; Handle back output voltage, the given signal of frequency to three phased control units 223; Convert pwm control signal there to; Electric to optic converter 225 through PWM controller 224 converts light signal to, mails to each power cell 210 from optical transmitter port 225c.Response message from power cell 210 converts the signal of telecommunication to through light/electric transducer 225, gives the processing back and in the CPU element 222 of two DSP, focuses on.CPU element 222 moves computings such as control, state analysis, failure diagnosis according to control command, given signal and operation information, response message; Carry out troubleshooting by nature of trouble after detecting fault; As block system, high-voltage trip etc.; And provide the corresponding failure signal, the fault acoustic signal also is provided.From exportable running status of I/O interface (switching value) and operational factor (analog quantity), the user can select output variable as required.
Referring to Fig. 5, Fig. 6, Fig. 7, the structure of control unit 220 is a unit-combination type, and its core is the CPU element 222 of two DSP, exchanges information with phased control unit 223 through bus and man-machine interactive interface 221.From the order of interface sub-module acceptable operating, given signal, current of electric and voltage etc.The CPU element 222 of two DSP calculates control information and state information according to operational order, given signal and other input signal.The control information that phased control unit 223 is accepted from the CPU element 222 of two DSP produces pwm control signal, through electric to optic converter 225, sends the control light signal to power cell 210.Answer signal from power cell 210 converts the signal of telecommunication in phased control unit 223, send the CPU element 222 of two DSP to handle after treatment.State information can be seen off through interface board and interface subtemplate.
The implementation procedure of the friendship of the utility model-straight conversion is following: frequency high voltage power supply three-phase 6KV, 50Hz are input to the former limit of phase shift isolating transformer 110 (3-phase dry type rectifier transformer), and Y connects.Secondary winding quantity is according to frequency converter voltage grade and structure and decide; 3kV series is 9, and 6kV series is 15, and extend-triangle connects the method phase shift; Phase difference between winding evenly distributes; Eliminated most ofly by the caused harmonic current of single power cell, total harmonic distortion (THD) is much smaller than the requirement of national standard 5%, and can keep the input power factor near 1.
The three-phase output of isolating transformer secondary is direct current through diode rectification, and to the energy storage capacitor charging, the voltage on the electric capacity offers the inverter circuit of being made up of IGBT.
Straight-the implementation procedure that alternation changes of the utility model is following: power control section is divided the vector Sine Wave Pulse Width Modulation (PWM) that produces, and acts on gate pole conducting and the shutoff of IGBT, makes IGBT export pulsed dc voltage from energy-storage capacitor.
High voltage converter for 6kV series; The output of each phase is by 5 power unit cascades (referring to Fig. 5); The voltage magnitude of each power cell output is ± impulse waveform of 693.5V; Pulse between the adjacent power unit differs 1/5 switch periods in time, and 5 power unit cascades stack phase voltage can obtain 11 different voltages with different grades, constitutes a complete sine wave period output and supplies with motor.So far high voltage converter is accomplished the control of a voltage cycle of motor.For different working conditions, the potential pulse of power cell output is different, and it is different that overlapped in series obtains the ac sine waveform of drive motors, reaches the purpose that changes voltage and frequency.
Referring to Fig. 7, all power cell in the same model frequency converter, the topological structure of circuit is identical, and this has made things convenient for replacing, in the future maintenance but come quick and convenient.
From the control light signal of control unit 220, through the conversion of light/electricity, the bypass signal when in control signal treatment circuit 211a, producing drive signal or the fault of IGBT is removed to drive IGBT or is triggered thyristor through the corresponding driving loop.Be collected among the answer signal treatment circuit 211b from the state information in major loop and other loops and handle; Concentrate after the electric to optic converter conversion; Send to control unit 220 inside with light signal; Control signal treatment circuit 211a sends signal after confirming fault, intervenes the operation of the utility model, like blockade, bypass.
When a certain group of power cell 210 broke down on request the output AC electricity, control unit 220 sent the IGBT locking signal, and bridge-type inverter is blocked; Send bypass signal simultaneously, the bypass thyristor triggering and conducting with between the output rectifier bridge constitutes the bypass branch road in the output loop, makes output current unhinderedly flow through this power cell.The frequency converter of this moment can be readjusted the output voltage of other power cells, and the system that makes works under lower slightly output voltage.
The utlity model has following characteristics:
One, high-quality power supply input
Input side isolating transformer secondary coil is through phase shift; For power cell provides power supply; 6KV is equivalent to the input of 30 pulses (3KV is 18 pulses) diode rectification; Eliminate major part by the caused harmonic current of single power cell, suppressed the generation of side harmonics (especially low-order harmonic) greatly.The mains by harmonics voltage harmonic electric current content that frequency converter causes satisfies IEEE Std 519-1992 and GB/T 14549-93 " quality of power supply utility network harmonic wave " to the strict demand of harmonic content, need not to install input filter and protects peripheral equipment to avoid Harmonic Interference.
Frequency converter rated input power factor need not power factor compensation capacitance greater than 0.96; Reduce idle input, reduce power supply capacity.
Two, perfect output performance
Ripple (or claiming multipleization of power cell) output is folded in the units in series pulse-width modulation; 3 unit of the 3KV every phase of series; 6KV series 5 unit of every phase (being equivalent to 11 level); Weakened output harmonic wave content greatly, output waveform is close to perfect sine wave, relatively has the following advantages with other forms of high-voltage large-capacity frequency converter:
1, need not to export filter;
2, can drive common high-tension motor, and can not increase electric machine temperature rise, reduce capacity motor;
3, motor cable does not have any length restriction;
4, the protection electrical machine insulation does not receive the infringement of dv/dt stress;
5, can not reduce service life of equipment because of harmonic wave moment.
Three, close friend's user interface
The utility model can adopt complete Chinese WINCE operating platform, and 7 inches very color LCD show.Full Chinese text statement and pattern identification are easy to learn and use.Large scale display can be provided with one or more groups parameter simultaneously, does not have loaded down with trivial details parameter Code Number, and it is accurate, directly perceived, convenient that parameter is provided with.Operational factor shows with screen, covers all at one glance.Be provided with state demonstration, touch screen operation locking.The time recording operational factor, the operation each time of writing down frequency converter automatically, and printable output record form.The real-time waveform that also can show output voltage or electric current simultaneously, but recorded and stored reaches 100 all previous faults; When operation with closed ring, pid parameter can onlinely be adjusted.
Four, other characteristics
1, the control power supply uses the UPS power supply, and system is more reliable;
2, high efficiency, under the rated condition, system total efficiency is up to more than 96%, and wherein frequency conversion part efficient is greater than 98%;
3, power unit module structure can be exchanged, and safeguards simple;
4, current-limiting function reduces frequency converter overcurrent protection tripping operation;
5, output voltage is adjusted automatically;
6, instantaneous power-off following function, representative value is 3 seconds, can normally move behind the power up;
7, power cell does not have the disturbance bypass;
8, the input voltage range of broadness is more suitable for domestic electrical network condition;
9, power cell optical-fibre communications control, complete electrical isolation, antijamming capability is strong;
10, internal PID adjuster can be realized operation with closed ring;
11, built-in PLC realizes the flexible control that different application is on-the-spot;
12, have this locality, long-range, upper three kinds of control modes;
13, comprehensively fault monitoring circuit, fault alarm protection timely and failure logging preservation accurately;
14, can make particular design according to customer requirements.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The just principle of describing in the foregoing description and the specification of the utility model; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the scope of the utility model that requires protection.The protection range that the utility model requires is defined by appending claims and equivalent thereof.
Claims (10)
1. the flame-proof mine high voltage converter is characterized in that, comprises a phase shifting transformer unit Flameproof box, a power cell Flameproof box, a cooling recirculation system Flameproof box and a radiator; Be provided with a phase shift isolating transformer and a cover cooling system in the said phase shifting transformer unit Flameproof box, be provided with power cell and a control unit and a cover cooling system of many group series connection in the said power cell Flameproof box;
A cover cooling system that is provided with in the said phase shifting transformer unit Flameproof box is connected with said cooling recirculation system Flameproof box; A cover cooling system that is provided with in the said power cell Flameproof box also is connected with said cooling recirculation system Flameproof box; Said cooling recirculation system Flameproof box is connected with said radiator;
The high-pressure side of said phase shift isolating transformer is connected in the three-phase high-voltage electrical network, and the power cells of said many group series connection are connected with the low-pressure side of phase shift isolating transformer respectively, is connected through optical fiber between said power cell and the control unit.
2. flame-proof mine high voltage converter according to claim 1; It is characterized in that a cover cooling system that is provided with in a cover cooling system that is provided with in said cooling recirculation system Flameproof box and the phase shifting transformer unit Flameproof box, the power cell Flameproof box and the connecting tube between the radiator are metal tube.
3. flame-proof mine high voltage converter according to claim 1; It is characterized in that; Said each group power cell is tri-level single and exports mutually; Be separate, the mutual isolation of each secondary winding of the low-pressure side of the phase shift isolating transformer of each power cell power supply, corresponding one by one mutually with the tri-level single of each power cell, link together, make organize that the power cells of connecting finally form the Y-connection mode the High Level AC Voltage of variable ratio frequency changer transformation is provided for high-tension motor.
4. according to claim 1 or 3 described flame-proof mine high voltage converters; It is characterized in that; Said control unit comprises a man-machine interactive interface; Said man-machine interactive interface is connected with the CPU element of two DSP, and the CPU element of said couple of DSP also connects a phased control unit, and said phased control unit also connects a PWM controller; Said PWM controller comprises an electric to optic converter, and the power cell of said many group series connection is connected with the light-receiving port through the corresponding light transmit port of two optical fiber and the electric to optic converter of PWM controller respectively.
5. according to claim 1 or 3 described flame-proof mine high voltage converters; It is characterized in that; Said each group power cell comprises a power cell control board respectively, and the light transmit port of said electric to optic converter connects the input of the inner control signal treatment circuit of power cell control board; The output of said control signal treatment circuit connects the inner IGBT of power cell control board and the input of SCR trigger module, and said IGBT and SCR trigger module also are provided with the feedback information end that sends feedback information to power cell; The light-receiving port of said electric to optic converter connects the output of the inner answer signal treatment circuit of power cell control board, and said answer signal treatment circuit also is provided with the input of the state information that reception sent by power cell.
6. according to claim 1 or 3 described flame-proof mine high voltage converters, it is characterized in that the group number of the power cell of said many group series connection is five groups; The voltage magnitude of said every group of power cell output is ± impulse waveform of 693.5V, and the pulse between the adjacent power unit differs 1/5 switch periods in time.
7. according to claim 1 or 3 described flame-proof mine high voltage converters, it is characterized in that said phased control unit is a CPLD FPGA programmable module.
8. according to claim 1 or 3 described flame-proof mine high voltage converters, it is characterized in that the CPU element of said couple of DSP is the CPU element of two 32 bit DSPs.
9. according to claim 1 or 3 described flame-proof mine high voltage converters; It is characterized in that; Said phase shifting transformer unit Flameproof box comprises the wire connection cavity of an explosion-proof chamber and this explosion-proof chamber one side; A said phase shift isolating transformer and a cover cooling system are arranged in the explosion-proof chamber; Said cooling system be positioned over explosion-proof chamber with the non-conterminous internal chamber wall of wire connection cavity before, the chamber wall between said wire connection cavity and the explosion-proof chamber is provided with the binding posts of the power cell of a plurality of major loops that are used to connect phase shift isolating transformer and power supply and many group series connection, is provided with hermetically-sealed construction between said binding post and the chamber wall; All places of being fitted to each other of other of said explosion-proof chamber are provided with hermetically-sealed construction; All are fitted to each other other of said wire connection cavity face and also are provided with hermetically-sealed construction.
10. according to claim 1 or 3 described flame-proof mine high voltage converters; It is characterized in that; Said power cell Flameproof box also comprises the wire connection cavity of an explosion-proof chamber and this explosion-proof chamber one side; The power cell of said many group series connection and the control unit that is attached thereto and a cover cooling system all are arranged in the explosion-proof chamber; Said cooling system be positioned over explosion-proof chamber with the non-conterminous internal chamber wall of wire connection cavity before; The binding post that chamber wall between said wire connection cavity and the explosion-proof chamber is provided with a plurality of power cells that are used to connect many group series connection and phase shift isolating transformer is the binding post that high-tension motor provides the High Level AC Voltage of variable ratio frequency changer transformation with organizing the power cell of connecting more, is provided with hermetically-sealed construction between said binding post and the chamber wall; All places of being fitted to each other of other of said explosion-proof chamber are provided with hermetically-sealed construction, and all are fitted to each other other of said wire connection cavity face and also are provided with hermetically-sealed construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203433567U CN202206300U (en) | 2011-09-14 | 2011-09-14 | Mine explosion-proof type high-voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203433567U CN202206300U (en) | 2011-09-14 | 2011-09-14 | Mine explosion-proof type high-voltage frequency converter |
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| CN202206300U true CN202206300U (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203433567U Expired - Fee Related CN202206300U (en) | 2011-09-14 | 2011-09-14 | Mine explosion-proof type high-voltage frequency converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307000A (en) * | 2011-09-14 | 2012-01-04 | 江苏聚友电气有限公司 | Mining high-voltage frequency converter with explosion-proof type |
| CN102684599A (en) * | 2012-05-07 | 2012-09-19 | 徐州中矿大传动与自动化有限公司 | Mine anti-explosion frequency conversion device with low switching frequency |
| CN106849691A (en) * | 2017-01-23 | 2017-06-13 | 青岛天信电气有限公司 | A kind of method of mining 10KV explosion-proof frequency converters and its control motor |
| CN107093959A (en) * | 2016-02-17 | 2017-08-25 | 南京紫泉电力设计咨询有限公司 | A kind of high voltage shore power converter plant |
-
2011
- 2011-09-14 CN CN2011203433567U patent/CN202206300U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307000A (en) * | 2011-09-14 | 2012-01-04 | 江苏聚友电气有限公司 | Mining high-voltage frequency converter with explosion-proof type |
| CN102684599A (en) * | 2012-05-07 | 2012-09-19 | 徐州中矿大传动与自动化有限公司 | Mine anti-explosion frequency conversion device with low switching frequency |
| CN107093959A (en) * | 2016-02-17 | 2017-08-25 | 南京紫泉电力设计咨询有限公司 | A kind of high voltage shore power converter plant |
| CN106849691A (en) * | 2017-01-23 | 2017-06-13 | 青岛天信电气有限公司 | A kind of method of mining 10KV explosion-proof frequency converters and its control motor |
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Granted publication date: 20120425 Termination date: 20170914 |