CN2819586Y - Uninterrupted power supply of electric motor - Google Patents
Uninterrupted power supply of electric motor Download PDFInfo
- Publication number
- CN2819586Y CN2819586Y CNU2005200441231U CN200520044123U CN2819586Y CN 2819586 Y CN2819586 Y CN 2819586Y CN U2005200441231 U CNU2005200441231 U CN U2005200441231U CN 200520044123 U CN200520044123 U CN 200520044123U CN 2819586 Y CN2819586 Y CN 2819586Y
- Authority
- CN
- China
- Prior art keywords
- diode
- static switch
- civil power
- links
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to an uninterrupted power supply of electric motor, including at least one variable frequency speed controlling device; the first input end of said variable frequency speed controlling device is connected to the commercial power and the output end is connected to the electric motor; it also includes at least a group of charging device which is composed of a high-frequency charging device and a first diode and is connected to the commercial power; the charging device is connected to the accumulator battery and one end of the static switch, and the other end of said static switch is connected to the second input end of the variable frequency speed controlling device via a direct current contactor; the commercial power is also connected to the control source redundancy power supply device; when the commercial power is normal, the static switch is in the state of interdiction; when the commercial power is abnormal or cut off, the static switch is in the conducting state; the beneficial effect of the utility model is that because the inverter adopts the variable frequency speed controlling device VVVF, it satisfies the technical requirement of inverter when the electric motor is started and operated; the maximum number of the protective electric motor with single system can reach 121.
Description
Technical field
The utility model relates to a kind of uninterrupted power supply (ups) Unity, relates in particular to a kind of uninterrupted power source for electric motor (MUPS).
Background technology
Uninterrupted power supply is a kind of when civil power cuts off the power supply or when commercial power supply is undesired, can supply the device of electricity.At present the UPS that uses solves static power consumption equipment as power failure, the electric problem of shaking of computer, Automation Control Instruments, PLC etc.UPS equipment is when civil power generation problem, and its inner storage battery replaces civil power rapidly to be continued to power to the load by inverter.Because the power supply object of inverter is static power consumption equipment, so its characteristics are: CVCF. (voltage, frequency are constants) obviously can not be simply suitable to the electric machinery load.
Raising along with the automatization level of process units, especially in petrochemical industry, chemical fibre is accurate to be made and the integrated circuit industry, in view of safety, the consideration of problems such as environmental protection and start-stop car cost, the part motor of many devices also needs to be equipped with the uninterrupted power supply that is fit to motor, and above-mentioned UPS obviously can not meet this requirement.
Summary of the invention
The utility model technical issues that need to address have provided a kind of uninterrupted power supply of suitable motor start-up running technology condition, are intended to solve the defective of above-mentioned general UPS.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises at least one RHVC; Described RHVC first input end links to each other with civil power, and output links to each other with motor; Also comprise at least one group of charging device of forming by the high-frequency charger and first diode that links to each other with civil power; One end of the high-frequency charger in the described charging device links to each other with civil power, the other end is connected with the negative pole of first diode, and the anodal of first diode is connected with an end of batteries and static switch simultaneously; The other end of described static switch is connected with RHVC second input by D.C. contactor; The number of described static switch is identical with the number of RHVC; Described civil power also is connected with control power supply redundancy electric supply installation; Described control power supply redundancy electric supply installation comprises a three-phase transformer that links to each other with civil power, and be connected by the negative pole of rectification module with second diode, the positive pole of second diode is connected with the positive pole of the 3rd diode, and the negative pole of the 3rd diode links to each other with batteries with static switch by the DCDC converting power source; When civil power just often, static switch is in blocking state; In undesired or when outage when civil power, static switch is in conducting state;
Compared with prior art, the beneficial effects of the utility model are: because inverter adopts RHVC VVVF to satisfy motor start-up, moves the specification requirement to inverter; Adopt full decentralized configuration overcoming the single point failure of system, and help system maintenance and maintenance; Single electric motor loop capacity of system can reach 250Kw at present; The multiloop system total capacity reaches 785Kw; Maximum single system protection number of motors reaches 121 motors.
Description of drawings
Fig. 1 is a schematic circuit of the present utility model;
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
The utility model comprises at least one RHVC; Described RHVC first input end links to each other with civil power, and output links to each other with motor; Also comprise at least one group of charging device of forming by the high-frequency charger and first diode that links to each other with civil power; One end of the high-frequency charger in the described charging device links to each other with civil power, the other end is connected with the negative pole of first diode, and the anodal of first diode is connected with an end of batteries BAT.G and static switch simultaneously; The other end of described static switch is connected with RHVC VVVF second input by D.C. contactor MF; The number of described static switch SW is identical with the number of RHVC; Described civil power also is connected with control power supply redundancy electric supply installation; Described control power supply redundancy electric supply installation comprises a three-phase transformer that links to each other with civil power, and be connected by the negative pole of rectification module with second diode, the positive pole of second diode is connected with the positive pole of the 3rd diode, and the negative pole of the 3rd diode links to each other with batteries with static switch by the DCDC converting power source; When civil power just often, static switch is in blocking state; In undesired or when outage when civil power, static switch is in conducting state;
The described at least one group of charging device of forming by the high-frequency charger and first diode that links to each other with civil power, every group is in parallel;
As seen from Figure 1: the utility model selects for use common two VVVF (RHVC) to make inverter; When civil power just often, all close in switch QF1-2, QD1-2, QFD1-2, MF1-2, QFB1～2; At this moment power supply is by switch QFZ, QF1-2, and two RHVC VVVF arrive motor M 1, M2 respectively; High-frequency charger ZL1, ZL2 by diode (led) module MD1 under the control of PLC to the automatic charge maintenance in batteries BATG1～2; Pass through three-phase transformer T1, rectification module ZL by civil power and batteries this moment, and DCDC converting power source T2, diode (led) module MD2 form control power supply redundancy electric power system; The switch MF1-2 that allots contactor QFD1-2, D.C. contactor of DC-BANK power supply (batteries) is in an closed position when motor moves, static switch SW1-2 is in blocking state, the dc voltage PLC monitoring simultaneously civil power 380V voltage of SW monitoring VVVF; When civil power is undesired, the VVVF dc voltage promptly can occur and be lower than 450VDC (VVVF under-voltage protection voltage 440VDC), or line voltage (VVVF under-voltage protection voltage 380VAC (1-10%)=342VAC) SW conducting voluntarily immediately when being lower than 350VAC; Or PLC sends the SW conducting immediately; The VVVF dc voltage reaches rated value SW simultaneously and blocks getting in touch of DC-BANK and VVVF automatically when the voltage of civil power recovers, and DC-BANK is in backup status again; The time span of DC-BANK support VVVF depends on the capacity of batteries.
Claims (2)
1. a uninterrupted power source for electric motor comprises at least one RHVC; Described RHVC first input end links to each other with civil power, and output links to each other with motor; It is characterized in that: also comprise at least one group of charging device of forming by the high-frequency charger and first diode that links to each other with civil power; One end of the high-frequency charger in the described charging device links to each other with civil power, the other end is connected with the negative pole of first diode, and the anodal of first diode is connected with an end of batteries and static switch simultaneously; The other end of described static switch is connected with RHVC second input by D.C. contactor; The number of described static switch is identical with the number of RHVC; Described civil power also is connected with control power supply redundancy electric supply installation; Described control power supply redundancy electric supply installation comprises a three-phase transformer that links to each other with civil power, and be connected by the negative pole of rectification module with second diode, the positive pole of second diode is connected with the positive pole of the 3rd diode, and the negative pole of the 3rd diode links to each other with batteries with static switch by the DCDC converting power source; When civil power just often, static switch is in blocking state; In undesired or when outage when civil power, static switch is in conducting state.
2. uninterrupted power source for electric motor according to claim 1 is characterized in that: the described at least one group of charging device of being made up of the high-frequency charger and first diode that links to each other with civil power, every group is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200441231U CN2819586Y (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power supply of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200441231U CN2819586Y (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power supply of electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2819586Y true CN2819586Y (en) | 2006-09-20 |
Family
ID=37005647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200441231U Expired - Lifetime CN2819586Y (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power supply of electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2819586Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394668C (en) * | 2005-08-05 | 2008-06-11 | 上海隽睿自动化技术有限公司 | Uninterrupted power source for electric motor |
| CN101262200B (en) * | 2008-04-17 | 2011-06-22 | 沈阳工业大学 | Multi-frequency converter speed-adjusting system for low-voltage high-power multi-branch AC motor |
-
2005
- 2005-08-05 CN CNU2005200441231U patent/CN2819586Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394668C (en) * | 2005-08-05 | 2008-06-11 | 上海隽睿自动化技术有限公司 | Uninterrupted power source for electric motor |
| CN101262200B (en) * | 2008-04-17 | 2011-06-22 | 沈阳工业大学 | Multi-frequency converter speed-adjusting system for low-voltage high-power multi-branch AC motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101702529B (en) | Power supply method for photovoltaic movable emergency power supply system | |
| CN201238200Y (en) | Intelligent generator set for uninterrupted power supply | |
| CN102118058A (en) | Weak current integrated UPS power system applied to urban mass transit and power supply method | |
| CN202084984U (en) | Light current integration UPS system applied to urban railway system | |
| CN103296738A (en) | Dual standby saving type direct current power supply system | |
| CN2870245Y (en) | Integrated power-supply device of transformer substation | |
| CN100394668C (en) | Uninterrupted power source for electric motor | |
| CN103683328B (en) | Automatic switching module and photovoltaic from net full-automatic power generation system | |
| CN103516045A (en) | Self-start control method of mobile power supply system | |
| CN201113483Y (en) | Frequency converter standby electric power supply system | |
| CN2819586Y (en) | Uninterrupted power supply of electric motor | |
| CN116404679A (en) | Micro-grid compensation device and micro-grid compensation method | |
| CN203301212U (en) | Dual standby saving type DC power supply system | |
| CN104953614A (en) | Distributed power supply grid-connection control system | |
| CN202474934U (en) | Medium voltage emergency power supply taking boosting rectification as charging security | |
| CN201458458U (en) | Elevator by utilizing wind energy | |
| CN103580060B (en) | A kind ofly be applicable to the controller of combining inverter and the method for supplying power to of electrical secondary system | |
| CN110707809A (en) | Automatic switching alarm device between independent UPS of transformer substation | |
| CN219717935U (en) | Voltage sag protection device suitable for direct-current bus end of low-voltage frequency converter | |
| CN105800440B (en) | Staircase operation control system | |
| CN202475006U (en) | Medium-voltage emergency power supply taking boosting pulse as guarantee for charging | |
| CN213585274U (en) | Dual-power switching circuit of transformer substation | |
| CN102624048A (en) | Integrated charge-discharge emergency power supply for medium-voltage system | |
| CN220475454U (en) | Emergency stop protection mechanism of compressor | |
| CN115842345B (en) | Energy router control method and energy router |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080611 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |