CN2792014Y - Power unit and high-voltage frequency transformer comprising multi power units - Google Patents
Power unit and high-voltage frequency transformer comprising multi power units Download PDFInfo
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- CN2792014Y CN2792014Y CNU2005200073564U CN200520007356U CN2792014Y CN 2792014 Y CN2792014 Y CN 2792014Y CN U2005200073564 U CNU2005200073564 U CN U2005200073564U CN 200520007356 U CN200520007356 U CN 200520007356U CN 2792014 Y CN2792014 Y CN 2792014Y
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- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 26
- 230000005855 radiation Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model relates to special power units of a high voltage frequency converter. The power units comprise a rectification circuit, a filtering capacitor which is connected with output of the rectification circuit, an inversion bridge which is connected with the filtering capacitor and a control circuit for controlling the work of the power units, wherein the power units also comprise a fan; the fan realizes electric supply through a dc link of the power units. The high voltage frequency converter comprises a plurality of power units, wherein the outputs of the power units are connected in series to output high voltage; the power units comprise the rectification circuit, the filtering capacitor which is connected with the output of the rectification circuit, the inversion bridge which is connected with the filtering capacitor and the control circuit for controlling the work of the power units; the control circuit is communicated with a master control system of the high voltage frequency converter through optical fibers; the power units also comprise the fan, and the fan realizes the electric supply through the dc link of the power units.
Description
Technical field
The utility model relates to the high voltage converter field, relates in particular to the power cell of high voltage converter and the high voltage converter of realizing high pressure by a plurality of power unit cascades.
Background technology
United States Patent (USP) 4674024,5625545,5986909 have introduced a kind of many level PWMs of units in series voltage-source type high voltage converter (the general output voltage grade of high voltage converter is pressed during external custom claims for exchanging 1KV-35KV) with the 395th page of Chinese China Machine Press " universal frequency converter and application thereof " second edition (ISBN 7-111-04766-4/TP.598).The frequency converter of this structure adopts the mode of several independent PWM frequency conversion power unit series connection, to realize multi-level high-voltage output, improves output voltage waveforms.Multipleization of the phase shift isolating transformer of many secondary is adopted in the frequency converter input, reaches harmonic cancellation when powering for each power cell respectively, improves input current waveform, improves the purpose of input power factor.This frequency converter can also can also be fully loaded with frequency converter or the derate operation by control system with fault power unit auto by pass under the situation of one or more power cell faults.
The general mode of concentrating ventilation and heat that adopts of the power cell radiating mode of existing high voltage converter.The cooling fan that utilizes one or several larger capacity takes the mode of exhausting the heat transmission air quantity to be provided simultaneously for all power cells by custom-designed air channel.Have following shortcoming: radiating effect is undesirable, because the ventilation quantity between each unit is distributed inequality, for the unit that guarantees the ventilation quantity minimum also can normally dispel the heat, can only improve the capacity of concentrating cooling fan, causes cost to rise, and noise increases, and power consumption rises; Owing to need the special air channel of design, cause the frequency converter overall construction design to be restricted, and machine volume be bigger.Concentrate the heat transmission blower fan generally to adopt outer low pressure accessory power supply (as exchanging 380 volts) power supply; perhaps obtain through the transformer step-down by input high pressure main power source (as 10KV or 6KV); when auxiliary power failure in outside or step-down link fault; cause cooling fan to work; cause frequency converter to shut down or damage, so just reduced reliability.In order to improve the reliability of frequency converter; the method of taking to add uninterrupted power supply UPS in the fan power loop is also arranged; but be subjected to the restriction of the battery capacity of UPS; the time of the sustainable operation of power failure dead electricity rear fan is also very limited, will be owing to overheated shutdown or damage after frequency converter moves in short-term.
The utility model content
Undesirable in order to solve the radiating effect of concentrating ventilation and heat to exist to a plurality of power cells in the existing high voltage converter, reliability is low, shortcomings such as cost height, first purpose of the present utility model provides a kind of high voltage converter that comprises a plurality of power cells, and it has simplicity of design, advantage that volume is little.
Second purpose of the present utility model provides a kind of power cell of high voltage converter special use, adopts this power cell, can cancel the concentrated cooling system of high voltage converter, makes the simplicity of design of high voltage converter, the reliability height.
In order to reach first purpose of the present utility model, the utility model provides a kind of high voltage converter, comprise a plurality of power cells, the output of described a plurality of power cells is series connected high voltage of output, described power cell comprises rectification circuit, the filter capacitor that links to each other with the output of rectification circuit, the inversion electric bridge that links to each other with filter capacitor, and the control circuit of power controlling cell operation, described control circuit is communicated by letter with the master control system of high voltage converter by optical fiber, it is characterized in that: described power cell also includes blower fan, and this blower fan is by the DC link power supply of power cell.
In order to reach second purpose of the present utility model, the utility model provides a kind of power cell that is used for high voltage converter, comprise rectification circuit, the filter capacitor that links to each other with the output of rectification circuit, the inversion electric bridge that links to each other with filter capacitor, and the control circuit of power controlling cell operation, described control circuit has and is used for the optical fiber interface of communicating by letter with the master control system of high voltage converter, it is characterized in that: described power cell also includes blower fan, and this blower fan is by the DC link power supply of power cell.
The beneficial effects of the utility model are:
According to the technical solution of the utility model, because each power cell dispels the heat separately, each power cell has self independently heat abstractor, improved radiating effect, saved the needed complicated air channel of concentrated heat radiation, optimization system designs, and has reduced the volume of frequency converter.
The heat radiation power supply does not need outside auxiliary low-tension supply by power cell power supply itself, and reliability improves greatly.
Because each power cell has oneself heat abstractor,, reduce cost optimized Structure Design simultaneously so shutdown or fault that the heat abstractor of some power cells can not be worked and can not be caused whole frequency converter can improve the reliability of high voltage converter greatly.
In addition, owing to come fan power supply by DC link, and the electric energy of the big capacitance stores on the DC link makes and can also work on a period of time at power cell outage rear fan, has improved the effect of heat radiation.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 unit series connection type high voltage frequency convertor topological structure
Fig. 2 has the power cell schematic diagram now
Fig. 3 has the unit series connection type high voltage frequency convertor radiating mode now
Fig. 4 adopts the distributed radiating principle figure of DC bus powered power cell
The distributed radiator structure of Fig. 5 power cell
Radiating principle figure when Fig. 6 adopts Redundancy Design
Fig. 7 adopts the radiator structure of the high voltage converter of power cell realization of the present utility model
Embodiment
Fig. 1 is the topological structure of unit series connection type high voltage frequency convertor, the High Level AC Voltage of input converter 11 through input transformers 12 isolate with step-down after the interstage exchange electricity that forms supply with each power cell 13 respectively.The input of power cell 13 is connected respectively to the transformer secondary, and the output of adjacent power unit is together in series, and forms high pressure output, supplies with high-voltage AC motor 14.As shown in Figure 2, there is unit control circuit 22 each power cell inside, and communicates by optical fiber 25 and master control system (not shown).Master control system is coordinated the control of each unit, accepts to send order from the information of unit and to the unit.Adopt the mode of 3 power unit cascades of every phase among the figure, the series connection number of power cell and the maximum output voltage of each power cell determine the maximum output voltage of whole frequency converter.
Fig. 2 is the structure of conventional power cell 13 among Fig. 1: the interchange of power cell is imported through forming Rectified alternating current through rectifier bridge (rectification circuit) back that is constituted by a diode behind the inlet wire fuse 21 (overcurrent protection is used), forms direct voltage thereby carry out filtering by the Rectified alternating current that the DC link filter circuit that filter capacitor 23 is formed is exported rectifier bridge between positive and negative bus.Direct voltage process between the positive and negative bus of DC link is by turn-offing the inverter bridge output that power electronic device Q forms certainly.Each from turn-off power electronic device Q also inverse parallel a fly-wheel diode is arranged.Apply suitable control signal by the control end that turn-offs power electronic device separately, can change the voltage magnitude and/or the frequency of inverter bridge output, thereby can export various appropriate signal inverter bridge, but the alternating current of variable voltage variable frequency normally.The electronic switch that in the power cell of some high voltage converter, also has an output bypass contactor 24 or form by power electronic device.Output bypass contactor 24 is used for the power cell of fault is carried out auto by pass.Power cell control circuit 22 is used for power electronic device and the various states of monitoring on the power controlling unit, connects frequency transformer main control system by optical fiber 25.Comprise a DC/DC Switching Power Supply converting means (DC-DC switch power source converting means) in the power cell control circuit, be used for and be converted to the used low-voltage of control circuit from the direct voltage (being generally 500V-3000V) that the DC link of power cell is come, this DC/DC Switching Power Supply converting means has several secondary windings usually, behind rectifying and wave-filtering, export for example 5V respectively, the direct voltage of positive and negative 15V and 24V uses for the different piece of power cell control circuit.For the power cell of low capacity, the part power device is as diode, the power electronic device or the filter capacitor that are used to form inverter bridge can be directly installed on the power cell control circuit, a shared circuit board.According to different needs, the rectifying part of power cell also can adopt thyristor or turn-off power electronic device certainly, as IGBT, thereby makes controlled rectification.The power cell circuit of this routine and various distressed structure thereof are that those of ordinary skill in the art is familiar with, and are not described in detail here.
Fig. 3 is the structure (the input transformer cabinet is not represented) of existing unit series connection type high voltage frequency convertor.As shown in Figure 3, at the power cell cabinet top of frequency converter 31 cooling fan 32 is arranged.This centralized cooling fan that is arranged in the frequency converter top dispels the heat to the power cell 13 that all are positioned at rack by the mode of exhausting.Among the figure middle row from left to right the power cell of secondary series be removed.As can be seen from the figure, each power cell all has a heat dissipation channel 34 that comprises an air inlet and a gas outlet, and the radiator of power cell is between air inlet and gas outlet.There is the hole corresponding with the gas outlet of power cell 36 in airtight air channel in that power cell is made by one or more insulating material behind, thereby the air channel is communicated with the gas outlet of power cell on the dielectric panel.This structural arrangement guarantees when air exhauster is worked, surrounding air can be from air inlet ingoing power unit, through flowing out from the gas outlet of power cell behind the radiator and extracting out by cooling fan 32, reach the purpose of heat radiation power unit through hole 36 corresponding on the insulation board.
Fig. 4 is the power cell that preferred implementation of the present utility model adopts.In this preferred implementation, in a conventional power cell, be equipped with the heat abstractor of forming by DC/DC Switching Power Supply converting means 41 and direct current cooling fan 42.
The input of DC/DC Switching Power Supply converting means 41 connects the positive bus-bar and the negative busbar of DC link respectively, and its output connects the working power input of DC fan or blower fan.The effect of DC/DC Switching Power Supply converting means is with obtaining suitable direct voltage (as direct current 12V or 24V or 48V) than High Level DC Voltage (be generally 500-3000 volt) through decompression transformation and supply with dc fan on the power cell DC link.The air quantity that dc fan running produces is used for direct heat radiation power device and other element that need dispel the heat or the indirect heat radiation power device of radiator or other elements that need dispel the heat by the heat radiation corresponding unit.DC/DC Switching Power Supply converting means can adopt any suitable buck DC/DC Switching Power Supply converting means (being called switching power circuit again).Structure about DC/DC Switching Power Supply converting means is that those of ordinary skill in the art is familiar with, and here is not described in detail.Specifically can be referring to " high frequency power electronics " (ISBN7-03-003356-6/TN.136 in 1993 of Science Press) chapter 2 PWM type DC-DC switch converters.
Method about auto by pass can be with reference to United States Patent (USP) 5986909.The fault power unit automatic pass-by method that this United States Patent (USP) proposes can be with the power cell auto by pass of fault, but whole frequency converter still can continue operation, to improve the reliability of system greatly.The specific implementation method is: the output contactor is positioned at position shown in Fig. 4 when normally moving, when any power cell breaks down, power cell control circuit notice frequency transformer main control system, the output contactor of control corresponding unit is moved downwards by position as shown in Figure 4 behind the inverter circuit trigger impulse of master control system blockade unit, unit excision with correspondence, remaining element continues operation, and frequency converter can continue fully loaded or derate output.
The DC/DC Switching Power Supply converting means of blower fan power supply usefulness also can combine setting with the DC/DC Switching Power Supply converting means of other purposes on the current power unit (circuit of powering with circuit board as the control to power cell) except can independently being provided with as shown in Figure 4.For example, by increasing by one group of secondary and corresponding circuit on the switch transformer basis of using DC/DC Switching Power Supply converting means in the power supply of available circuit plate, obtain low-voltage direct output, fan is powered.Allow the shared DC/DC Switching Power Supply converting means of blower fan and control circuit board can be conveniently to the control of blower fan, especially will be under situation with the following controlled way operation that will describe.
Because the power supply of power cell is by the power supply of high pressure main power source, as long as realized the high pressure main power source, the DC link of power cell just can be given the power supply of heat transmission blower fan.Certainly this blower fan can be taked following two kinds of operational modes: not controlled, promptly high pressure powers on and just turns round; Controlled, promptly take temperature control mode or time control mode to realize intermittent duty according to the temperature and the ambient temperature of power cell.The start-stop of blower fan is controlled by the unit controls circuit.In this case, the unit controls circuit also is connected with DC/DC Switching Power Supply converting means, thereby controls starting or stoping of DC/DC Switching Power Supply converting means.
Fig. 5 is the radiator structure of the utility model power cell.Cooling fan 42 is positioned at the air intake inlet of power cell 13 radiators among the figure, takes the mode of drying.Adopted 1 blower fan that is contained in the air intake inlet shown in the figure.Blower fan also can be installed in the air outlet of radiator, takes the mode of exhausting.Also can take the plug-type cooling means of blower fan being installed simultaneously at air inlet and air outlet.For the power cell of low capacity, radiator is less, is fixed on usually on the single power device, and blower fan can directly be dried to device, carries out heat radiation.
Cooling fan also can adopt two or more blower fans according to the requirement of heat radiation.As adopt two or more cooling fans, each blower fan can adopt separately independently DC/DC Switching Power Supply converting means power supply, a perhaps public DC/DC Switching Power Supply converting means.
Fig. 6 is the Redundancy Design of the cooling system of the utility model power cell.As shown in Figure 6, if require to need only the individual cooling fan of n (n＞=1) with regard under enough situations,, can increase a standby fan 42 in order to improve reliability according to the normal heat radiation of power cell
N+1And use an independently DC/DC Switching Power Supply converting means 41 separately
N+1Power supply.When in n the cooling fan blower fan and powered switch power failure thereof being arranged, can start standby blower fan 42 automatically
N+1And corresponding Switching Power Supply 41
N+1As the backup operation, make the heat radiation of power cell unaffected.Can certainly when operate as normal, move n+1 cooling fan and Switching Power Supply thereof simultaneously, to improve the heat radiation allowance.In above-mentioned Redundancy Design, also can take n+2 or more a plurality of cooling fans and Switching Power Supply thereof to carry out rich more Redundancy Design.The monitoring of cooling fan fault can be taked to monitor the power cell method of temperature and carry out indirect monitoring, goes up in limited time when the power cell temperature surpasses normal operation, and thinking has cooling fan or corresponding Switching Power Supply fault.The method that also can adopt the input current to the pairing DC/DC Switching Power Supply of blower fan converting means to detect, when the input current of DC/DC Switching Power Supply converting means during, promptly think cooling fan or corresponding DC/DC Switching Power Supply converting means fault less than normal value.Temperature value that monitors or current value can be given the control circuit of power cell, judge whether to break down by control circuit then, and under the situation of fault, this failure condition is notified to the master control module, handle accordingly by the master control module then, for example bypass corresponding power cell or the standby blower fan of startup under the situation of standby fan is being arranged.The work that starts standby fan also can be finished separately by the unit controls circuit, and without the assistance of master control module.
In the concrete execution mode of temperature detection, a temperature sensor can be installed on radiator, temperature sensor is given the unit controls circuit with the temperature that is sensed, if control circuit is found the temperature that senses and is exceeded a predetermined threshold value, then can start standby blower fan or not have to send out a control signal under the situation of standby fan the master controller of frequency converter, the notice master controller is with corresponding power unit by-pass.The threshold temperature of radiator can come respective settings according to the parameter of the most highly reliable working temperature etc. of power device.
In the concrete execution mode of current detecting, a current detector can be installed in the input of the DC/DC of blower fan correspondence Switching Power Supply converting means, current detector is given the unit controls circuit with detected electric current, if control circuit is found detected electric current and is lower than a predetermined threshold value, then can start standby blower fan or not have to send out a control signal under the situation of standby fan the master controller of frequency converter, the notice master controller is with corresponding power unit by-pass.The threshold value of electric current can be come respective settings according to the required parameters such as current value of blower fan operate as normal.
In the design, can the state of power cell cooling fan and DC/DC Switching Power Supply converting means be detected, and the fault of cooling fan and DC/DC Switching Power Supply converting means is included in the fault coverage of power cell auto by pass.Can be when power cell cooling fan or DC/DC Switching Power Supply converting means fault by bypass contactor automatically with corresponding power unit by-pass, with further raising unfailing performance.
In addition, because the blower fan of power cell is powered by the intermediate dc link in the utility model, so the rectification circuit of power cell is preferably with mode rectification that can not pressure regulation, the rectification circuit of realizing with diode for example, can make the direct voltage of DC link keep stable like this, make the work of blower fan more reliable.
Fig. 7 shows and has adopted the frequency converter of being realized behind the power cell of the present utility model.In structure shown in Figure 7, each power cell 13 is all sucked the air of the surrounding environment air inlet from the front, unit by cooling fan 42, and air outlet is from behind discharged then, directly blows to the space of frequency converter back.As shown in Figure 7, because each power cell 13 all has the cooling fan 42 of oneself, so airtight exhausting formula heat dissipation wind channel shown in Figure 3 can be provided with.As long as the wind energy nature that has living space that goes out after the guaranteed output unit heat radiation is got rid of.In Fig. 7, the power cell in the middle of second row does not draw, and does not therefrom have heat dissipation wind channel in the back of power cell as can be seen.As shown in Figure 7, at the top of frequency converter 31 a natural exhaust mouth 71 can be set also, if the riding position of frequency converter can guarantee that a heat-dissipating space is arranged in the back certainly, then the natural exhaust mouth 71 at top is optional.In other execution mode, in order to improve the effect of heat radiation, can give prominence to the exhausting duct that a similar chimney is installed, thereby utilize the circulation of the principle quickening air of similar chimney at the top of frequency converter, improve radiating effect.Also can consider as required a blower fan is installed in exhausting duct, promote the circulation of air.On the arrangement mode of power cell, also the air channel of power cell itself can be made mode from down to up, and the back guarantees that the same air channel that lists each unit is a vertical alignment in being installed to frequency converter, so just can make full use of the convection effects in air channel itself.
Be for each power cell another one benefit of being brought of dispelling the heat respectively: owing to for example adopt the bearing of the little blower fan of axial flow of magnetic bearing can accomplish almost not wearing and tearing, so the life-span of blower fan is very long.And the big blower fan of concentrating, because almost inevitable bearing wear just needed to change in general several years, this has just caused the trouble of safeguarding.And, under the situation that each power cell dispels the heat respectively,, also can not influence the operation of other power cell even there is the cooling system of some unit to be out of order, whole frequency converter can work on.That is to say that distributed heat radiation frequency converter of the present utility model has the advantage of being convenient to safeguard.
Above reference embodiment of the present utility model has been described the utility model; but those of ordinary skill in the art obviously can make various modifications, changes and improvements to embodiment, but these modifications, changes and improvements all should belong to protection range of the present utility model.
Claims (21)
1, a kind of power cell that is used for high voltage converter, comprise rectification circuit, the filter capacitor that links to each other with the output of rectification circuit, the inversion electric bridge that links to each other with filter capacitor, and the control circuit of power controlling cell operation, described control circuit has and is used for the optical fiber interface of communicating by letter with the master control system of high voltage converter, and it is characterized in that: described power cell also includes blower fan, and described blower fan is by the DC link power supply of power cell.
2, power cell as claimed in claim 1, it is characterized in that: described blower fan is a dc fan, and described power cell also comprises independently DC/DC Switching Power Supply converting means, is used for high voltage with DC link and is transformed into and is fit to the low voltage that blower fan uses.
3, power cell as claimed in claim 1 is characterized in that: described blower fan is a dc fan, and described blower fan and the shared DC/DC Switching Power Supply of described control circuit converting means.
4, as claim 1, each described power cell of 2 or 3, it is characterized in that: the control of the controlled circuit of described blower fan, thus can the Be Controlled circuit turn-off or start.
5, as claim 1, each described power cell of 2 or 3, it is characterized in that: described power cell comprises an air outlet and an air inlet, and described blower fan is installed in the air outlet place of power cell or at described air outlet and air inlet place a blower fan is installed respectively.
6, as claim 1, each described power cell of 2 or 3, it is characterized in that: described power cell also comprises a standby fan and corresponding DC/DC Switching Power Supply converting means thereof.
7, power cell as claimed in claim 6, it is characterized in that: described power cell also comprises the temperature sensor of temperature of the radiator of a sense power unit, surpass a predetermined threshold value if sense the temperature of radiator, then can start standby blower fan.
8, power cell as claimed in claim 6, it is characterized in that: described power cell also comprises the device of the input current of a detection and blower fan corresponding D C/DC Switching Power Supply converting means, if sense input current less than a predetermined threshold value, then can start standby blower fan.
9. high voltage converter, comprise a plurality of power cells, the output of described a plurality of power cells is series connected high voltage of output, described power cell comprises rectification circuit, the filter capacitor that links to each other with the output of rectification circuit, the inversion electric bridge that links to each other with filter capacitor, and the control circuit of power controlling cell operation, described control circuit is communicated by letter with the master control system of high voltage converter by optical fiber, it is characterized in that: described power cell also includes blower fan, and described blower fan is by the DC link power supply of power cell.
10, high voltage converter as claimed in claim 9, it is characterized in that: described blower fan is a dc fan, and described power cell also comprises independently DC/DC Switching Power Supply converting means, is used for high voltage with DC link and is transformed into and is fit to the low voltage that blower fan uses.
11, high voltage converter as claimed in claim 9 is characterized in that: described blower fan is a dc fan, and described blower fan and the shared DC/DC Switching Power Supply converting means of described control circuit.
12, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: the control of the controlled circuit of described blower fan, thus can the Be Controlled circuit turn-off or start.
13, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: described power cell comprises an air inlet and an air outlet, and described blower fan is installed in the air outlet place of power cell or at described air outlet and air inlet place a blower fan is installed respectively.
14, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: an outstanding exhausting duct is arranged on the top of frequency converter.
15, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: described power cell also comprises a standby fan and corresponding DC/DC Switching Power Supply converting means thereof.
16, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: described power cell also comprises the temperature sensor of temperature of the radiator of a sense power unit, surpass a predetermined threshold value if sense the temperature of radiator, then start standby blower fan.
17, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: described power cell also comprises the temperature sensor of temperature of the radiator of a sense power unit, surpass a predetermined threshold value, the then power cell of bypass correspondence under the control of master controller if sense the temperature of radiator.
18, high voltage converter as claimed in claim 17 is characterized in that: the rectification circuit in the described power cell is a diode rectifier circuit.
19, as claim 9, each described high voltage converter of 10 or 11, it is characterized in that: described power cell also comprises the device of the input current of a detection and blower fan corresponding D C/DC Switching Power Supply converting means, if sense input current less than a predetermined threshold value, then start standby blower fan or under the situation that does not have standby fan to use, the power cell of bypass correspondence under the control of master controller.
20, high voltage converter as claimed in claim 14 is characterized in that: the blower fan that promotes circulation of air is installed on described exhausting duct.
21, high voltage converter as claimed in claim 13 is characterized in that: described air inlet and air outlet are provided with from the bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNU2005200073564U CN2792014Y (en) | 2005-03-24 | 2005-03-24 | Power unit and high-voltage frequency transformer comprising multi power units |
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| CNU2005200073564U CN2792014Y (en) | 2005-03-24 | 2005-03-24 | Power unit and high-voltage frequency transformer comprising multi power units |
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| CN2792014Y true CN2792014Y (en) | 2006-06-28 |
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| CN101388730B (en) * | 2008-10-22 | 2011-05-18 | 南京航空航天大学 | Power unit for single optical fiber communication and controlling method thereof |
| CN102104322A (en) * | 2011-02-22 | 2011-06-22 | 艾默生网络能源有限公司 | High-voltage inverter power unit |
| CN102497111A (en) * | 2011-11-20 | 2012-06-13 | 合肥华耀电子工业有限公司 | Fast-control power supply system based on IPM (intelligent power module) H-bridge cascade connection |
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| CN104950946A (en) * | 2014-07-29 | 2015-09-30 | 希望森兰科技股份有限公司 | Heat radiation control system of high-voltage frequency converter |
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| CN110557031A (en) * | 2019-09-17 | 2019-12-10 | 苏州安驰控制系统有限公司 | A frequency converter and a frequency converter system |
| CN112713786A (en) * | 2021-01-27 | 2021-04-27 | 微山县微山湖微电子产业研究院有限公司 | Silicon carbide type high-voltage frequency converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101388730B (en) * | 2008-10-22 | 2011-05-18 | 南京航空航天大学 | Power unit for single optical fiber communication and controlling method thereof |
| CN102104322A (en) * | 2011-02-22 | 2011-06-22 | 艾默生网络能源有限公司 | High-voltage inverter power unit |
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