CN201022144Y - Power protector - Google Patents
Power protector Download PDFInfo
- Publication number
- CN201022144Y CN201022144Y CNU2007201035516U CN200720103551U CN201022144Y CN 201022144 Y CN201022144 Y CN 201022144Y CN U2007201035516 U CNU2007201035516 U CN U2007201035516U CN 200720103551 U CN200720103551 U CN 200720103551U CN 201022144 Y CN201022144 Y CN 201022144Y
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- power supply
- test section
- phase
- central control
- utility
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Abstract
The utility model discloses a power supply protector, wherein the utility model inputs the collected power supply information to a central control part through a phase sequence detecting part and a current detecting part, the central control part compares, judges, calculates and then exports the final control signal to an output control part, and the output control part controls the power supply. The utility model can precisely follow the phase sequence and the current real-time condition of the three-phase power supply and optimize the normal operating of controlling and protecting the electrical apparatus according to the changes. The utility model has rapid responding speed and high precision, and also has the phase sequence protection and short circuit protection functions of the three-phase power supply and the over current and the overloading protection functions of the three-phase current. The utility model is mainly applicable for the power supply protection of the compressor and also fit for the protection of other three-phase power supply.
Description
Technical field
The utility model relates to a kind of running protection device of electric equipment, relates in particular to a kind of power supply protector.
Background technology
Power supply protector in the industrial production; especially the power supply protector of screw air compressor mainly is order, the electric current situation of change according to the supply voltage of screw compressor; acquisition system information changes, compares, judges that by circuit signal controlled target is optimized protection to be controlled.
The power supply protector control of screw air compressor of the prior art is simple relatively, to phase sequence, overcurrent, the overload protection dependence outer low pressure parts of compressor, controls as the switching value input of phase sequence relay, thermal relay etc.The shortcoming of this control mode is, ancillary equipment is numerous, and system compatibility is poor, and control precision can not reach necessary requirement, and control principle is simple, and it is slow to respond.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, highly sensitive power-supply controller of electric of control.
The purpose of this utility model is achieved through the following technical solutions:
Power supply protector of the present utility model comprises power protecting circuit, and described power protecting circuit comprises test section, central control section and output control part, and the detected power information in described test section is input to central control section; Described central control section receives and handles the information that the test section is transmitted, and sends control command according to the result who handles to output control part then; Described output control part receives and carries out relevant control according to the control command that central control section transmits.
Described test section comprises current detecting part and phase sequence test section, and described current detecting part is connected with power supply by current transformer; Described phase sequence test section is connected with power supply.
Described current detecting part branch comprises one-level discharge circuit, filter circuit, secondary discharge circuit, and the current signal that described one-level discharge circuit received current instrument transformer transmits is also handled, and the signal after will handling then inputs to filter circuit; After filter circuit filtering, input to the secondary discharge circuit; The secondary discharge circuit is handled back output to signal.
Described phase sequence test section comprises photoelectrical coupler, after the phase sequence test section receives the AC signal of power supply and handles, exports by photoelectrical coupler.
Described central control section is a single-chip microcomputer.
Described output control part comprises switching value output and display part.
The technical scheme that is provided by above-mentioned the utility model as can be seen, power supply protector described in the utility model, because power protecting circuit comprises test section, central control section and output control part, the detected power information in described test section is input to central control section; Described central control section receives and handles the information that the test section is transmitted, and sends control command according to the result who handles to output control part then; Described output control part receives and carries out relevant control according to the control command that central control section transmits.Simple in structure, control highly sensitive.Mainly be applicable to the compressor power protection, also be applicable to the protection of other three phase mains.
Description of drawings
Fig. 1 is the theory diagram of power-supply controller of electric of the present utility model;
Fig. 2 is the circuit theory diagrams of current detecting part of the present utility model;
Fig. 3 is the circuit theory diagrams of phase sequence of the present utility model test section;
Fig. 4 is phase sequence detection waveform figure of the present utility model.
Embodiment
Power supply protector of the present utility model, its preferable embodiment as shown in Figure 1, comprise power protecting circuit, described power protecting circuit comprises test section, central control section and output control part, and the detected power information in described test section is input to central control section; Described central control section receives and handles the information that the test section is transmitted, and sends control command according to the result who handles to output control part then; Described output control part receives and carries out relevant control according to the control command that central control section transmits, and effective protective effect is played in the operation of electric equipment.
Described test section comprises current detecting part and phase sequence test section.The phase sequence test section that can also comprise other.
Described current detecting part is connected with power supply by current transformer.Described current detecting part branch comprises one-level discharge circuit, filter circuit, secondary discharge circuit, and the current signal that described one-level discharge circuit received current instrument transformer transmits is also handled, and the signal after will handling then inputs to filter circuit; After filter circuit filtering, input to the secondary discharge circuit; The secondary discharge circuit is handled back output to signal.Like this, the current signal of 0～1A of three phase mains current transformer input after transforming amplification, arrives central control section with this signal conveys.
Specifically as shown in Figure 2, after the current signal of a phase is imported by input ILNI1 in the detected three phase mains of current transformer, after the one-level discharge circuit of being made up of one-level operational amplifier U15C and the second diode D2 etc. amplifies current signal and is converted to voltage signal, after the filter circuit of forming by the 36 resistance and the 16 electric capacity carries out filtering, input to by the 31 resistance, the secondary discharge circuit that the 32 resistance and two-level operating amplifier U6C form, the secondary discharge circuit is transported to central control section after signal is amplified, and the current acquisition of other two-phase is identical.By central control section signal is handled.
Described phase sequence test section is connected with power supply.Comprise photoelectrical coupler, after the phase sequence test section receives the AC signal of power supply and handles, export by photoelectrical coupler.
Specifically as shown in Figure 3, the 8th diode D8, the 9th diode D9 and photoelectrical coupler U17 are transported to central control section after the AC signal of the power supply that receives is converted into square-wave signal.By the existing and judgement of central control section to the signal place.
As shown in Figure 4, judge first phase voltage square wave level height at the second phase voltage U2 square wave rising edge; Simultaneously, judge first phase voltage square wave level height at the second phase voltage U2 square wave trailing edge, judged result is as follows:
At the second phase voltage U2 square wave rising edge, the first phase voltage U1 square wave is a high level; And at the second phase voltage U2 square wave trailing edge, the first phase voltage U1 square wave is a low level, and then the phase sequence of three phase mains is a positive.
At the second phase voltage U2 square wave rising edge, the first phase voltage U1 square wave is a low level; And at the second phase voltage U2 square wave trailing edge, the first phase voltage U1 square wave is a high level, and then the phase sequence of three phase mains is anti-phase.
At the second phase voltage U2 square wave rising edge, the first phase voltage U1 square wave is a high level; And at the second phase voltage U2 square wave trailing edge, the first phase voltage U1 square wave is a high level, and then the phase sequence of three phase mains is unusual.
At the second phase voltage U2 square wave rising edge, the first phase voltage U1 square wave is a low level; And at the second phase voltage U2 square wave trailing edge, the first phase voltage U1 square wave is a low level, and then three phase mains is a non-full-phase state.
The signal that central authorities' control section is partly imported phase sequence test section, current detecting sends to output control part with instruction after by comparison, computing and judgement, and central control section is preferably single-chip microcomputer.
Output control part comprises and comprises switching value output and display part.Output control part is controlled power supply after receiving instruction, and to the voltage power supply state show, information output such as warning.
The utility model can accurate tracking three-phase power supply phase sequence, electric current real-time status, and change the normal operation of optimal control, protection electric equipment according to it.Response speed is fast, precision is high, has three-phase power supply phase sequence protection, short-circuit protection concurrently, three-phase current overcurrent, overload protection function.Mainly be applicable to the compressor power protection, also be applicable to the protection of other three phase mains.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.
Claims (6)
1. a power supply protector comprises power protecting circuit, it is characterized in that, described power protecting circuit comprises test section, central control section and output control part, and the detected power information in described test section is input to central control section; Described central control section receives and handles the information that the test section is transmitted, and sends control command according to the result who handles to output control part then; Described output control part receives and carries out relevant control according to the control command that central control section transmits.
2. power supply protector according to claim 1 is characterized in that, described test section comprises current detecting part and phase sequence test section, and described current detecting part is connected with power supply by current transformer; Described phase sequence test section is connected with power supply.
3. power supply protector according to claim 2, it is characterized in that, described current detecting part branch comprises one-level discharge circuit, filter circuit, secondary discharge circuit, the current signal that described one-level discharge circuit received current instrument transformer transmits is also handled, and the signal after will handling then inputs to filter circuit; After filter circuit filtering, input to the secondary discharge circuit; The secondary discharge circuit is handled back output to signal.
4. power supply protector according to claim 2 is characterized in that, described phase sequence test section comprises photoelectrical coupler, after the phase sequence test section receives the AC signal of power supply and handles, exports by photoelectrical coupler.
5. power supply protector according to claim 1 is characterized in that, described central control section is a single-chip microcomputer.
6. power supply protector according to claim 1 is characterized in that described output control part comprises switching value output and display part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201035516U CN201022144Y (en) | 2007-02-09 | 2007-02-09 | Power protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201035516U CN201022144Y (en) | 2007-02-09 | 2007-02-09 | Power protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201022144Y true CN201022144Y (en) | 2008-02-13 |
Family
ID=39089559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201035516U Expired - Lifetime CN201022144Y (en) | 2007-02-09 | 2007-02-09 | Power protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201022144Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455390A (en) * | 2010-10-27 | 2012-05-16 | 约克（无锡）空调冷冻设备有限公司 | Phase sequence detection circuit, control board and phase sequence protection device |
| CN101770847B (en) * | 2009-01-05 | 2012-06-20 | 胜德国际研发股份有限公司 | Improved inductor, power protector and power socket |
| CN102661643A (en) * | 2012-05-22 | 2012-09-12 | 广东智科电子有限公司 | Heat pump system protector |
| CN103280764A (en) * | 2013-04-24 | 2013-09-04 | 广东志高空调有限公司 | Anti-explosion commodity inspection box of compressor |
| CN107565507A (en) * | 2017-10-09 | 2018-01-09 | 珠海格力电器股份有限公司 | Compressor overcurrent protective device, method and electric equipment |
| CN116191369A (en) * | 2023-04-23 | 2023-05-30 | 北京国力电气科技有限公司 | Automatic phase sequence adjustment method and system for mine protection device, electronic equipment and storage medium |
-
2007
- 2007-02-09 CN CNU2007201035516U patent/CN201022144Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770847B (en) * | 2009-01-05 | 2012-06-20 | 胜德国际研发股份有限公司 | Improved inductor, power protector and power socket |
| CN102455390A (en) * | 2010-10-27 | 2012-05-16 | 约克（无锡）空调冷冻设备有限公司 | Phase sequence detection circuit, control board and phase sequence protection device |
| CN102661643A (en) * | 2012-05-22 | 2012-09-12 | 广东智科电子有限公司 | Heat pump system protector |
| CN103280764A (en) * | 2013-04-24 | 2013-09-04 | 广东志高空调有限公司 | Anti-explosion commodity inspection box of compressor |
| CN103280764B (en) * | 2013-04-24 | 2016-09-07 | 广东志高空调有限公司 | A kind of compressor anti-explosion commodity inspection box |
| CN107565507A (en) * | 2017-10-09 | 2018-01-09 | 珠海格力电器股份有限公司 | Compressor overcurrent protective device, method and electric equipment |
| CN116191369A (en) * | 2023-04-23 | 2023-05-30 | 北京国力电气科技有限公司 | Automatic phase sequence adjustment method and system for mine protection device, electronic equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080213 |
|
| CX01 | Expiry of patent term |