CN1909322A - Uninterrupted power source for electric motor - Google Patents
Uninterrupted power source for electric motor Download PDFInfo
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- CN1909322A CN1909322A CN 200510028571 CN200510028571A CN1909322A CN 1909322 A CN1909322 A CN 1909322A CN 200510028571 CN200510028571 CN 200510028571 CN 200510028571 A CN200510028571 A CN 200510028571A CN 1909322 A CN1909322 A CN 1909322A
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- diode
- static switch
- civil power
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- power source
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Abstract
The invention relates to a continuous power source of motor, which comprises: at least one frequency-variable speed adjuster whose first end is connected to the city electricity and output is connected to the motor; and at least one group of chargers formed by high-frequency charger and first diode; said charger is connected to accumulator and one end of static switch; another end of static switch via direct-current is connected to the second input of frequency-variable speed adjuster; said city electricity is connected to the abundant power supplier of control power source; when the city electricity is normal, the static switch is blocked; when the city electricity is abnormal, the static switch is connected. And the invention has the advantages that: since the inverter uses frequency-variable speed adjuster VVVF to meet the demands when starting and operating motor, and the maximum single system protected motor number can reach 121.
Description
Technical field
The present invention relates to a kind of uninterrupted power supply (ups) Unity, relate 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 technical issues that need to address of the present invention 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 present invention is achieved by the following technical solutions:
The present invention includes 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 invention has the beneficial effects as follows: 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 invention;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
The present invention includes 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 present invention 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 |
|---|---|---|---|
| CNB2005100285717A CN100394668C (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power source for electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100285717A CN100394668C (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power source for electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1909322A true CN1909322A (en) | 2007-02-07 |
| CN100394668C CN100394668C (en) | 2008-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100285717A Active CN100394668C (en) | 2005-08-05 | 2005-08-05 | Uninterrupted power source for electric motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN100394668C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958561A (en) * | 2009-07-20 | 2011-01-26 | 硕天科技股份有限公司 | Uninterrupted power system supporting active load |
| CN102025181B (en) * | 2009-09-11 | 2013-07-24 | 硕天科技股份有限公司 | Power saving type online interactive uninterruptable power supply system |
| CN109428388A (en) * | 2017-09-01 | 2019-03-05 | 硕天科技股份有限公司 | Uninterrupted power supply system |
| CN111164865A (en) * | 2017-10-06 | 2020-05-15 | 日本电产株式会社 | Motor module and electric power steering apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5081368A (en) * | 1989-04-28 | 1992-01-14 | Atlas Energy Systems, Inc. | Uninterruptible power supply with a variable speed drive driving an induction motor/generator |
| CN2321156Y (en) * | 1998-01-20 | 1999-05-26 | 袁德芳 | High-power uninterrupted power supply device for motors |
| US6133716A (en) * | 1998-10-23 | 2000-10-17 | Statordyne, Inc. | High-efficiency high-power uninterrupted power system |
| CN2819586Y (en) * | 2005-08-05 | 2006-09-20 | 上海隽睿自动化技术有限公司 | Uninterrupted power supply of electric motor |
-
2005
- 2005-08-05 CN CNB2005100285717A patent/CN100394668C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958561A (en) * | 2009-07-20 | 2011-01-26 | 硕天科技股份有限公司 | Uninterrupted power system supporting active load |
| CN102025181B (en) * | 2009-09-11 | 2013-07-24 | 硕天科技股份有限公司 | Power saving type online interactive uninterruptable power supply system |
| CN109428388A (en) * | 2017-09-01 | 2019-03-05 | 硕天科技股份有限公司 | Uninterrupted power supply system |
| CN111164865A (en) * | 2017-10-06 | 2020-05-15 | 日本电产株式会社 | Motor module and electric power steering apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100394668C (en) | 2008-06-11 |
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