CN2383269Y - Maintenance-free frequency conversion type AC uninterrupted power supply - Google Patents
Maintenance-free frequency conversion type AC uninterrupted power supply Download PDFInfo
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- CN2383269Y CN2383269Y CN 99215007 CN99215007U CN2383269Y CN 2383269 Y CN2383269 Y CN 2383269Y CN 99215007 CN99215007 CN 99215007 CN 99215007 U CN99215007 U CN 99215007U CN 2383269 Y CN2383269 Y CN 2383269Y
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- frequency conversion
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a frequency conversion type alternating current uninterrupted power source, the emergent uninterrupted power source of trades alternating current asynchronous motor driven process equipment such as specially adapted metallurgy, petrochemical industry. The utility model discloses obtain DC voltage by the three-phase AC power through the rectifier, after the electric capacity filters, obtain three-phase AC output through the three-phase inverter, be connected a duplex heat standby charging controller between rectifier and the three-phase inverter, by pulse width modulation signal control charging controller's voltage and current output, through reactor ILF and electric capacity C3C4After filtering, constant voltage current-limiting charging is carried out on a battery pack consisting of a maintenance-free fully-closed valve-controlled lead-acid battery.
Description
The utility model has related to a kind of frequency conversion type and has exchanged uninterruption power source, is specially adapted to process equipment that industry AC induction motor such as metallurgy, petrochemical industry drive do not allow the to have a power failure emergent uninterruption power source of occasion.
At present, interchange uninterruption power source (UPS) the out-put supply frequency of international and domestic various brands is the 50HZ fixed frequency, is only applicable to computer, communication, security personnel and office equipment, and the overload capacity of design is lower.If when being used for the motor load starting, electric current can reach 5～7 times of rated current, force and select the uninterruption power source capacity will be 3～5 times of capacity motor, otherwise can cause tripping operation maybe can't start, it is unreliable to move.The capacity that increases UPS can satisfy electric motor starting, but certainly will increase several times investment.When various universal frequency converters are used for the AC induction motor starting, owing to adopt electric voltage frequency to control (V/f=constant) simultaneously, promptly limited starting current, do not lose starting torque again, and have the frequency control function, but all frequency converters all do not possess the uninterruption power source function.
The purpose of this utility model provides a kind of device, integrate UPS uninterruption power source function and frequency converter variable frequency function, be specifically designed to varying frequency starting, the speed governing operation of various AC induction motor loads, and have the power failure of interchange and also can run without interruption, guarantee the function that process equipment does not have a power failure.
Be achieved by the following technical solution to the purpose of this utility model: the utility model obtains direct voltage by the three-phase AC power supplies through rectifier, behind capacitor filtering, obtain three-phase alternating current output by three-phase inverter, it is characterized in that being connected a two-node cluster hot backup type charge controller between rectifier and the three-phase inverter, by the voltage and current output of pulse-width signal control charge controller, through reactor ILF and capacitor C
3C
4The battery pack of after the filtering a non-maintaining totally-enclosed valve controlled type lead-acid battery being formed is carried out modified constant-voltage charge, and its battery pack and three-phase inverter are by the isolation of power diode 3VD.
Two-node cluster hot backup type charge controller of the present utility model can be made of two IGBT power devices, the control utmost point of two IGBT has pulse-width signal all the time, shared cover voltage sensor of two charge controllers and current sensor make the emitter of two IGBT have galvanic current to press output all the time as feedback signal.The emitter of two IGBT is connected to the maximum selector switch that a group of diode 1VD, 2VD form, and makes the voltage that just often has only an IGBT by diode 1VD or 2VD output.The control utmost point of two IGBT has pulse-width signal to export control by an industrial PLC all the time.
That the utility model compared with prior art has is simple to operate, intuitive display, reliable characteristics.
Description of drawings of the present utility model is as follows:
Fig. 1 is an electrical schematic diagram of the present utility model.
Below in conjunction with description of drawings the utility model is described in further detail: as shown in Figure 1, three-phase AC power supplies of the present utility model is through the direct voltage of rectifier acquisition 532V, through capacitor C
1C
2After the filtering, the three-phase inverter of leading up to obtains the three-phase alternating current output of 0～380V, 0～300HZ; Another road is by a two-node cluster hot backup type charge controller (adopting the IGBT power device), with the voltage and current output of pulse modulation technology control charge controller, through reactor ILF and capacitor C
3C
4After the filtering battery pack of being made up of the non-maintaining totally-enclosed valve controlled type lead-acid battery of 42 joints is carried out modified constant-voltage charge, make battery pack be in floating charge state forever.Because the isolation of power diode 3VD works alone charge controller and inverter separately, inverter can be realized the varying frequency starting and the speed governing operation of motor load, and device effect this moment and a universal ac-dc-ac inverter device are identical.Only when AC power has a power failure suddenly, charge controller stops the charging to battery pack, and the cathode voltage of power diode 3VD descends at this moment, make battery pack 540V full voltage by 3VD spark (only for diode forward ON time ns), provide continual input DC power to three-phase inverter, make motor realize running without interruption.When AC power restored electricity, charge controller was resumed work automatically, and to the battery pack compensating charge, three-phase inverter is automatically converted to rectifier power supply simultaneously, and motor still keeps former running status.
For the occasion that allows motor intermittent operation in short-term, can switch by two A.C. contactors at this input side that installs three-phase inverter, AC power is just often powered to motor by a contactor, exchange when having a power failure, automatically switch to another contactor by the power supply of this device, realize varying frequency starting, continue operation, be about 0.1S switching time.
Two-node cluster hot backup type charge controller is that online heat is equipped with, two IGBT power devices all are in online heat and are equipped with state work, promptly the control utmost point of two IGBT has pulse-width signal all the time, because shared cover voltage sensors of two charge controllers and current sensor are as feedback signal, make the emitter of two IGBT have galvanic current to press output all the time, just because the emitter of two IGBT is connected to one group of diode 1VD, the maximum selector switch that 2VD forms, make the voltage that just often has only an IGBT by diode 1VD or 2VD output, or two IGBT work in output state (high frequency switching) in turn, have only when the control utmost point of an IGBT loses pulse-width signal or open circuit fault occurs, the output voltage of another IGBT was sent by diode 1VD or 2VD moment, only be the forward conduction time (ns) of diode switching time, do not influence the charging process to battery pack at all.
This device monitoring and control system is finished by an industrial PLC, be furnished with corresponding control programs and monitoring software, have touch full-localized intelligence operation display panel, finish the start-stop operation of parameter demonstration, fault inquiry, charge controller and inverters such as charging voltage, charging current, electric machine frequency, current of electric and the state picture of whole system and show.Supervisory control system provides direct current 220V through DC/DC converter power supply by 18 batteries in the battery pack, and guaranteeing to exchange when having a power failure also can operate as normal, makes whole power-supply system have simple to operate, intuitive display, reliable characteristics.
The technical characterstic of this device:
1, integrate UPS and frequency converter function, capacity is big, applied range, not between The cut-off electricity, energy varying frequency starting, speed governing, reliable, replenished domestic blank.
2, range of capacity is wide: 2.2KW-1500KW is applicable to that various low-pressure industrial motors supply Electricity.
3, have the variable frequency soft start function, starting current can arbitrarily be set, and does not only reduce Starting torque, and for the motor of same capability, the Power Management Design capacity only is general 1/3 of logical UPS, and price is about 1/2 of UPS, ratio of performance to price excellence.
4, can realize on-line operation, just often by electrical network through inverter power supply, during grid power blackout, can zero second time switch to powered battery, do not influence the operation of process equipment at all, having a power failure holds time can select battery capacity to determine according to the load size.
5, having the frequency control function, as be used for constant pressure water supply, constant oil supply pressure system, can realize energy-conservationly, and also can normally move behind grid power blackout, is " multi-functional machine ".
Claims (4)
1, a kind of non-maintaining frequency conversion type exchanges uninterruption power source, the three-phase AC power supplies obtains direct voltage through rectifier, behind capacitor filtering, obtain three-phase alternating current output by three-phase inverter, it is characterized in that being connected a two-node cluster hot backup type charge controller between rectifier and the three-phase inverter, by the voltage and current output of pulse-width signal control charge controller, through reactor ILF and capacitor C
3C
4The battery pack of after the filtering a non-maintaining totally-enclosed valve controlled type lead-acid battery being formed is carried out modified constant-voltage charge, and its battery pack and three-phase inverter are by the isolation of power diode 3VD.
2, non-maintaining frequency conversion type according to claim 1 exchanges uninterruption power source, it is characterized in that two-node cluster hot backup type charge controller is made of two IGBT power devices, the control utmost point of two IGBT has pulse-width signal all the time, shared cover voltage sensor of two charge controllers and current sensor make the emitter of two IGBT have galvanic current to press output all the time as feedback signal.
3, non-maintaining frequency conversion type according to claim 1 and 2 exchanges uninterruption power source, the emitter that it is characterized in that two IGBT is connected to the maximum selector switch that a group of diode 1VD, 2VD form, and makes the voltage that just often has only an IGBT by diode 1VD or 2VD output.
4, non-maintaining frequency conversion type according to claim 3 exchanges uninterruption power source, it is characterized in that the control utmost point of two IGBT has pulse-width signal to export control by an industrial PLC all the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99215007 CN2383269Y (en) | 1999-06-14 | 1999-06-14 | Maintenance-free frequency conversion type AC uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99215007 CN2383269Y (en) | 1999-06-14 | 1999-06-14 | Maintenance-free frequency conversion type AC uninterrupted power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2383269Y true CN2383269Y (en) | 2000-06-14 |
Family
ID=34007068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99215007 Expired - Fee Related CN2383269Y (en) | 1999-06-14 | 1999-06-14 | Maintenance-free frequency conversion type AC uninterrupted power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2383269Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9742338B2 (en) | 2013-06-21 | 2017-08-22 | Danfoss Power Electronics A/S | Dual power mode drive |
-
1999
- 1999-06-14 CN CN 99215007 patent/CN2383269Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9742338B2 (en) | 2013-06-21 | 2017-08-22 | Danfoss Power Electronics A/S | Dual power mode drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN CITY ZHONGYE FILES ELECTRIC APPLIANCE EQ Free format text: FORMER OWNER: UNI-PHIS CO., LTD., SHENZHEN Effective date: 20040709 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040709 Address after: 518048, 3, 5A, Tian An Digital City, Shenzhen, Guangdong, Futian District Patentee after: Shenzhen city phayse Electric Equipment Co. Ltd. Address before: 518054 Guangdong province Shenzhen Nanyou Cheonan Industrial Zone 8 Patentee before: Urey-Phyth Co., Ltd., Shenzhen |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |