CN202334410U - Frequency conversion control system - Google Patents
Frequency conversion control system Download PDFInfo
- Publication number
- CN202334410U CN202334410U CN2011204517822U CN201120451782U CN202334410U CN 202334410 U CN202334410 U CN 202334410U CN 2011204517822 U CN2011204517822 U CN 2011204517822U CN 201120451782 U CN201120451782 U CN 201120451782U CN 202334410 U CN202334410 U CN 202334410U
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- CN
- China
- Prior art keywords
- frequency
- motor
- transducer
- motors
- frequency conversion
- 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 - Fee Related
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Abstract
The utility model relates to a frequency conversion control system. A three-phase alternating current bus is respectively and correspondingly connected with N motors through N power frequency contactors, a transducer is further connected onto the three-phase alternating current bus, a control output end of the transducer is respectively and correspondingly connected with each motor through N frequency conversion contactors, and the N is equal to or larger than two. The frequency conversion control system uses one transducer to control a plurality of motors, and selection and switch are carried out through the frequency conversion contactors which the motors correspond. When the transducer has faults, the motors are switched to power frequency for operation. Only one motor works at one time generally, so that the transducer is used for controlling the motor in the operation state at the time, one transducer can control the plurality of motors, and space and cost are saved.
Description
Technical field
The utility model relates to a kind of frequency-changing control system.
Background technology
Most power-equipment operational modes are one main one to be equipped with (operation, one subsequent use) in the production, because the Frequency Converter Control starting characteristic is soft, speed governing smoothly makes things convenient for, adopt frequency converter to control mostly.
Drag two motors scheme of (main is equipped with) like Fig. 1 respectively for adopting two frequency converters.This mode needs two frequency converters, respectively corresponding two motors.L1, L2, L3 are that power supply source exchanges the 380V inlet wire; QF1 is a lead-in circuit breaker; QF2 is the separated time circuit breaker of motor 1; QF3 is the separated time circuit breaker of motor 2; QF4 is the separated time circuit breaker of frequency converter; KM1 is the power frequency loop contactor of motor 1; KM2 is the frequency conversion loop contactor of motor 1; KM3 is the power frequency loop contactor of motor 2; KM4 is the frequency conversion loop contactor of motor 2; FR1 is the protection thermal relay of motor 1; FR2 is the protection thermal relay of motor 2;
ammeter of serving as theme;
voltmeter of serving as theme.For a motor, when its frequency converter failure, can receive power frequency operation, but this system adopts two frequency converters to be used for controlling owing to adopt multi-frequency converter, has so both increased site space, has increased failure rate again, has also increased expense through contactor.
The utility model content
The purpose of the utility model provides a kind of frequency-changing control system, in order to solve existing frequency-changing control system waste resource, the problem that cost is too high.
For realizing above-mentioned purpose; The scheme of the utility model is: a kind of frequency-changing control system; The three-phase alternating current bus is respectively through N motor of the corresponding connection of N power frequency contactor; Also be equipped with a frequency converter on the three-phase alternating current bus, the control output end of this frequency converter is respectively through said each motor of the corresponding connection of N frequency conversion contactor; N >=2.
As a kind of optimal way, said N=2.
The utility model is selected to switch through the corresponding frequency conversion contactor of motor with a plurality of motors of Frequency Converter Control.Work as frequency converter failure, motor switches to power frequency operation.Because the same time generally has only a motor operation, this moment, frequency converter just was used to control the motor that this is in running status, so be the may command multiple electric motors with a frequency converter only, had saved space and cost.
Description of drawings
Fig. 1 is the frequency-changing control system of prior art;
Fig. 2 is a kind of execution mode of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Be illustrated in figure 2 as frequency-changing control system with two motors of a Frequency Converter Control; Through power frequency contactor KM1, KM3 connects two motor M 1, M2 to the three-phase alternating current bus respectively; Also be provided with a frequency converter on the three-phase alternating current bus; The control output end of this frequency converter is respectively through frequency conversion contactor KM2, and KM4 connects two motor M 1, M2.QF2 is the separated time circuit breaker of motor 1; QF3 is the separated time circuit breaker of motor 2; QF4 is the separated time circuit breaker of frequency converter; FR1 is the protection thermal relay of motor 1; FR2 is the protection thermal relay of motor 2;
ammeter of serving as theme;
voltmeter of serving as theme.When M1 need start and during converting operation, closed KM2, KM1, KM3, KM4 break off.When M2 need start and during converting operation, closed KM4, KM1, KM2, KM3 break off.
Claims (2)
1. frequency-changing control system; The three-phase alternating current bus is respectively through N motor of the corresponding connection of N power frequency contactor; It is characterized in that, also be equipped with a frequency converter on the said three-phase alternating current bus, the control output end of this frequency converter is respectively through said each motor of the corresponding connection of N frequency conversion contactor; N >=2.
2. a kind of frequency-changing control system according to claim 1 is characterized in that, said N=2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204517822U CN202334410U (en) | 2011-11-15 | 2011-11-15 | Frequency conversion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204517822U CN202334410U (en) | 2011-11-15 | 2011-11-15 | Frequency conversion control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334410U true CN202334410U (en) | 2012-07-11 |
Family
ID=46446374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204517822U Expired - Fee Related CN202334410U (en) | 2011-11-15 | 2011-11-15 | Frequency conversion control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334410U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972787A (en) * | 2017-04-01 | 2017-07-21 | 长兴创睿机电有限公司 | A kind of double helix frequency conversion tank |
| CN111077842A (en) * | 2019-12-12 | 2020-04-28 | 首钢京唐钢铁联合有限责任公司 | Automatic switching control system for alloy electric vibration fault behind converter |
| US20230151722A1 (en) * | 2021-11-16 | 2023-05-18 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and starting method thereof, fracturing apparatus set |
-
2011
- 2011-11-15 CN CN2011204517822U patent/CN202334410U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972787A (en) * | 2017-04-01 | 2017-07-21 | 长兴创睿机电有限公司 | A kind of double helix frequency conversion tank |
| CN111077842A (en) * | 2019-12-12 | 2020-04-28 | 首钢京唐钢铁联合有限责任公司 | Automatic switching control system for alloy electric vibration fault behind converter |
| CN111077842B (en) * | 2019-12-12 | 2022-12-13 | 首钢京唐钢铁联合有限责任公司 | Automatic switching control system for alloy electric vibration fault behind converter |
| US20230151722A1 (en) * | 2021-11-16 | 2023-05-18 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and starting method thereof, fracturing apparatus set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151115 |
|
| EXPY | Termination of patent right or utility model |