CN102270545A - Knife switch used for switching between power source and frequency converter - Google Patents
Knife switch used for switching between power source and frequency converter Download PDFInfo
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- CN102270545A CN102270545A CN2011101215488A CN201110121548A CN102270545A CN 102270545 A CN102270545 A CN 102270545A CN 2011101215488 A CN2011101215488 A CN 2011101215488A CN 201110121548 A CN201110121548 A CN 201110121548A CN 102270545 A CN102270545 A CN 102270545A
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Abstract
The invention discloses a knife switch used for switching between a power source and a frequency converter, which mainly comprises a copper sheet knife, six groups of triplex terminal points and four groups of triplex elastic copper sheets. The copper sheet knife can be closed upward or closed downward to switch between the power source and the frequency converter conveniently, rapidly and reliably. When the frequency converter is needed, the frequency converter is rapidly connected in a circuit, and when the frequency converter is not needed, the frequency converter is rapidly exits the circuit. Therefore, the convenience is provided for operators, the working time of the frequency converter is reduced, and the service life of the frequency converter is increased.
Description
One, technical field: the present invention relates to a kind of knife switch, the knife switch that switches mutually especially for power supply and frequency converter.
Two, background technology: frequency converter is to utilize the on-off action of power semiconductor device power frequency supply to be transformed to the electric energy control device of another frequency; Be to use converter technique and microelectric technique, the frequency by changing the machine operation power supply and the mode of amplitude are controlled the Electric Drive element of alternating current motor; Can realize soft start, frequency control, raising running accuracy, change power factor (PF), overcurrent/overvoltage/functions such as overload protection to AC induction motor.Use frequency converter, can realize the stepless speed regulation of threephase asynchronous.Though frequency converter is a stationary apparatus, and the consumers as filtering capacitor, cooling fan is also arranged,, be expected the life-span more than 10 years if they are carried out regular maintenance.
When on existing device, carrying out motor stepless speed regulation transformation, generally can install the frequency converter of capacity coupling additional in the motor front.The normal conditions existing device can carry a grade governing system, as the gear train speed change system.By adjusting the gears engaged of the different numbers of teeth, change rotating speed, but because of number of gears limited, the only limited rotating speed of gear train governing system.Structure according to reductor is different with lubricating system, should be noted that some problems.Usually can consider that on the structure of gear 70～80Hz is a greatest limit, when adopting oil lubrication, under low speed continuously operative relation to the damage of gear etc.
In application, occur because of the operating habit difference through regular meeting, the staff who has will use frequency converter; and the uncomfortable frequency converter of using of staff is arranged also; still custom is used the gear speed governing, and this can carry out the switching of power supply and frequency converter after will changes persuing transforming frequently at any time.
In application,, must use frequency converter sometimes because of speed governing needs.And also can occur, some speed gear speed governing just can meet the demands, and just needn't use frequency converter this moment, can directly power supply be inserted motor.
In application, be subjected to the influence of motor temperature and detent torque, should not realize when needing low speed, can adopting the form of frequency converter and gears engaged to be used with frequency converter than low cruise, also can directly realize low cruise with gears engaged.
In order to realize the switching between power supply and the frequency converter, can adopt 3 contactors to be connected with frequency converter, forming circuit control, if but contactor is aging through long-term use, and just might make supply voltage directly enter inverter output terminal, and burn frequency converter.
Three, summary of the invention:
1, goal of the invention: the invention provides a kind of knife switch that power supply and frequency converter switch mutually that is used for, its objective is convenient, fast, carry out mutual switching between power supply and the frequency converter reliably, when needing to use frequency converter, make its rapid place in circuit, when not needing to use frequency converter, make it withdraw from circuit rapidly, thus the handled easily person, also reduce the operating time of frequency converter, prolong its useful life.
2, technical scheme: the present invention implements according to following technical scheme: a kind ofly be used for knife switch structure that power supply and frequency converter switch mutually for to be provided with the plug-in strip structure and to contact the copper sheet structure on insulating base (1); Wherein the plug-in strip structure for be installed in following link (2) on the insulating base (1) with the lower shaft of 6 strip copper sheets (3) to fixed-site, its top is fixing by last link (4), last link (4) also is provided with handle (5); The contact copper sheet is made up of 6 groups of 3 tie points that are installed on the insulating base (1), is respectively upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8), input three ties points (10), output three ties points (7).
A kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8) are positioned at the equal height of insulating base (1); Import three ties point (10), output three ties points (7) are positioned at the equal height of insulating base (1), but are lower than (9) 15 millimeters of lower-left three ties points.
A kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that upper left three ties point (12), upper right three ties point (6) are connected with 6 elastic copper sheets (11) on top respectively by copper sheet, lower-left three ties point (9), bottom right three ties point (8) by copper sheet respectively 6 of bottom be connected with elastic copper sheet (11).
A kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that importing three ties point (10), output three ties points (7) are connected with 6 strip copper sheets (3) respectively by copper sheet.
A kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that, strip copper sheet (3) is rotated around link (2) down by moving handle (5); Upwards rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into top, input three ties points (10) are connected by 6 strip copper sheets (3) with upper right three ties point (6) with upper left three ties point (12), output three ties points (7); Rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into the bottom, input three ties points (10) are connected by 6 strip copper sheets (3) with bottom right three ties point (8) with lower-left three ties point (9), output three ties points (7).
3, advantage and effect: by enforcement of the present invention, when adopting frequency converter that threephase asynchronous is carried out stepless speed regulation, can carry out the switching between power supply and the frequency converter easily, according to instructions for use, use or do not use frequency converter, thereby can prolong the useful life of frequency converter.
Four, description of drawings;
Fig. 1 is a structure diagram of the present invention.Fig. 2 is the electric diagram of invention.Fig. 3 is the application circuit of invention.
Mark: 1-pedestal; Link under the 2-; The 3-copper sheet; The last link of 4-; The 5-handle; The upper right three ties point of 6-; 7-exports three ties point; 8-bottom right three ties point; 9-lower-left three ties point; 10-imports three ties point; The 11-elastic copper sheet; The upper left three ties point of 12-; The 13-frequency converter; The knife switch that 14-power supply and frequency converter switch mutually; The 15-motor; The positive contactor of 16-; The 17-contactor that reverses; The 18-three-phase power line.
Five, embodiment:
Embodiment 1: a kind ofly be used for the knife switch that power supply and frequency converter switch mutually, its structure is for to be provided with the plug-in strip structure and to contact the copper sheet structure on insulating base (1); Wherein the plug-in strip structure for be installed in following link (2) on the insulating base (1) with the lower shaft of 6 strip copper sheets (3) to fixed-site, its top is fixing by last link (4), last link (4) also is provided with handle (5); The contact copper sheet is made up of 6 groups of 3 tie points that are installed on the insulating base (1), is respectively upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8), input three ties points (10), output three ties points (7).
Upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8) are positioned at the equal height of insulating base (1); Import three ties point (10), output three ties points (7) are positioned at the equal height of insulating base (1), but are lower than (9) 15 millimeters of lower-left three ties points.
Upper left three ties point (12), upper right three ties point (6) are connected with 6 elastic copper sheets (11) on top respectively by copper sheet, lower-left three ties point (9), bottom right three ties point (8) by copper sheet respectively 6 of bottom be connected with elastic copper sheet (11).
Import three ties point (10), output three ties points (7) be connected with 6 strip copper sheets (3) respectively by copper sheet.
Embodiment 2:, can make strip copper sheet (3) around link (2) rotation down by moving handle (5); Upwards rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into top, input three ties points (10) are connected by 6 strip copper sheets (3) with upper right three ties point (6) with upper left three ties point (12), output three ties points (7); Rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into the bottom, input three ties points (10) are connected by 6 strip copper sheets (3) with bottom right three ties point (8) with lower-left three ties point (9), output three ties points (7).
Embodiment 3: during application, 3 lines of three-phase power line (18) are connected on respectively on the input three ties points (10), will export three ties point (7) respectively with 3 leads and be connected on the binding post of motor (15); Respectively upper left three ties point (12) is connected on the input of frequency converter (13) with 3 leads, respectively upper right three ties point (6) is connected on the output of frequency converter (13) with 3 leads; Respectively lower-left three ties point (9) is connected in order with lead on the input contact of positive contactor (16) and counter-rotating contactor (17), respectively bottom right three ties point (8) is connected in order with lead on the output contact of positive contactor (16) and counter-rotating contactor (17).
Embodiment 4: upwards move handle (5) and make strip copper sheet (3) upwards closed, three-phase power line (18) links to each other frequency converter energising work by input three ties points (10), strip copper sheet (3) left side 3 copper sheets, upper left three ties points (12) with the input of frequency converter (13); The output of frequency converter (13) links to each other with the binding post of motor (15) by upper right three ties point (6), 3 copper sheets in strip copper sheet (3) right side, output three ties points (7), and motor has the Frequency Converter Control rotation.
Embodiment 5: move handle (5) downwards and make strip copper sheet (3) closed downwards, three-phase power line (18) links to each other with the input contact of positive contactor (16) and counter-rotating contactor (17) by input three ties points (10), 3 copper sheets in strip copper sheet (3) left side, lower-left three ties point (9); The output contact of positive contactor (16) and counter-rotating contactor (17) links to each other with the binding post of motor (15) by bottom right three ties point (8), 3 copper sheets in strip copper sheet (3) right side, output three ties points (7), and motor (15) is by positive contactor (16) and counter-rotating contactor (17) control rotation.
Claims (5)
1. one kind is used for the knife switch that power supply and frequency converter switch mutually, and its structure is for to be provided with the plug-in strip structure and to contact the copper sheet structure on insulating base (1); Wherein the plug-in strip structure for be installed in following link (2) on the insulating base (1) with the lower shaft of 6 strip copper sheets (3) to fixed-site, its top is fixing by last link (4), last link (4) also is provided with handle (5); The contact copper sheet is made up of 6 groups of 3 tie points that are installed on the insulating base (1), is respectively upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8), input three ties points (10), output three ties points (7).
2. according to claim 1ly a kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that upper left three ties point (12), upper right three ties point (6), lower-left three ties point (9), bottom right three ties point (8) are positioned at the equal height of insulating base (1); Import three ties point (10), output three ties points (7) are positioned at the equal height of insulating base (1), but are lower than (9) 15 millimeters of lower-left three ties points.
3. according to claim 1ly a kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that upper left three ties point (12), upper right three ties point (6) are connected with 6 elastic copper sheets (11) on top respectively by copper sheet, lower-left three ties point (9), bottom right three ties point (8) by copper sheet respectively 6 of bottom be connected with elastic copper sheet (11).
4. according to claim 1ly a kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that importing three ties point (10), output three ties points (7) contact with 6 strip copper sheets (3) respectively by copper sheet.
5. according to claim 1ly a kind ofly be used for the plug-in strip that power supply and frequency converter switch mutually and open, it is characterized in that, strip copper sheet (3) is rotated around link (2) down by moving handle (5); Upwards rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into top, input three ties points (10) are connected by 6 strip copper sheets (3) with upper right three ties point (6) with upper left three ties point (12), output three ties points (7); Rotate in the medial launder of the elastic copper sheet (11) that strip copper sheet (3) can be pressed into the bottom, input three ties points (10) are connected by 6 strip copper sheets (3) with bottom right three ties point (8) with lower-left three ties point (9), output three ties points (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101215488A CN102270545A (en) | 2011-05-12 | 2011-05-12 | Knife switch used for switching between power source and frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101215488A CN102270545A (en) | 2011-05-12 | 2011-05-12 | Knife switch used for switching between power source and frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102270545A true CN102270545A (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101215488A Pending CN102270545A (en) | 2011-05-12 | 2011-05-12 | Knife switch used for switching between power source and frequency converter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB122085A (en) * | 1918-03-20 | 1919-01-16 | Igranic Electric Co Ltd | Improvements in Electric Motor Controllers. |
| CN2221824Y (en) * | 1994-10-26 | 1996-03-06 | 许秀清 | Four-electrode safety knife switch |
| CN2343614Y (en) * | 1998-06-22 | 1999-10-13 | 陈绍玉 | Motor speed regulator for automatic constant pressure supplying water and thermostatic ventilation |
| CN2429947Y (en) * | 2000-05-29 | 2001-05-09 | 张马栓 | Phase-off protecting knife switch for three phase motor |
| CN2624373Y (en) * | 2003-05-09 | 2004-07-07 | 高翔凌 | A conversion type switch disconnector |
| CN202067713U (en) * | 2011-05-12 | 2011-12-07 | 沈阳工业大学 | Knife switch used in mutual switching between power supply and frequency converter |
-
2011
- 2011-05-12 CN CN2011101215488A patent/CN102270545A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB122085A (en) * | 1918-03-20 | 1919-01-16 | Igranic Electric Co Ltd | Improvements in Electric Motor Controllers. |
| CN2221824Y (en) * | 1994-10-26 | 1996-03-06 | 许秀清 | Four-electrode safety knife switch |
| CN2343614Y (en) * | 1998-06-22 | 1999-10-13 | 陈绍玉 | Motor speed regulator for automatic constant pressure supplying water and thermostatic ventilation |
| CN2429947Y (en) * | 2000-05-29 | 2001-05-09 | 张马栓 | Phase-off protecting knife switch for three phase motor |
| CN2624373Y (en) * | 2003-05-09 | 2004-07-07 | 高翔凌 | A conversion type switch disconnector |
| CN202067713U (en) * | 2011-05-12 | 2011-12-07 | 沈阳工业大学 | Knife switch used in mutual switching between power supply and frequency converter |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111207 |