CN202364194U - High-frequency three-phase contactless electronic switch - Google Patents
High-frequency three-phase contactless electronic switch Download PDFInfo
- Publication number
- CN202364194U CN202364194U CN2011205069607U CN201120506960U CN202364194U CN 202364194 U CN202364194 U CN 202364194U CN 2011205069607 U CN2011205069607 U CN 2011205069607U CN 201120506960 U CN201120506960 U CN 201120506960U CN 202364194 U CN202364194 U CN 202364194U
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- electronic switch
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Abstract
The utility model relates to a high-frequency three-phase contactless electronic switch, which drives multiple motors to be connected and disconnected under the situation that one frequency converter is adopted for output. The high-frequency three-phase contactless electronic switch comprises a small-sized three-phase transformer, rectification voltage control circuits and electric power electronic elements, wherein the small-sized three-phase transformer with one primary winding and three secondary windings is adopted, the primary and secondary windings are independent from and insulated to one another, the primary winding is coupled to the three secondary windings through an alternating control signal to obtain three control voltage by coupling action, and the three control voltages are applied to an electric power electronic element control panel after being controlled and divided by the rectification voltage control circuits. The three secondary windings of the small-size three-phase transformer are respectively connected onto two connectors of each one of three bridge-typed rectifiers of the rectification voltage-control circuits, the other two connectors of each bridge-typed rectifiers are respectively connected with a resistance R and a capacitance C and then are connected with an electronic device Q, and finally a three-phase voltage is transmitted to a motor through a high-frequency power source of the converter. The high-frequency three-phase contactless electronic switch can be used in different industries such as textile industry, coal mines and the like.
Description
Technical field
The utility model relates to the contactless electronic beam switch technical field, exactly is the high frequency three-phase contactless electronic switch that a kind of break-make of utilizing a frequency converter to drive multiple motors is controlled.
Background technology
Because of devices such as present SCR AC switch can not be accomplished frequency converter and many three phase electric machine noncontacting switches controls.So three present controls all are to be waited by relay, A.C. contactor or air switch to accomplish.These equipment all have the contact, and often break-make uses electric current can produce spark and mechanical wear through the contact, is prone to cause hidden danger.Particularly important in industries such as weaving, collieries.
Summary of the invention
The purpose of the utility model provides a kind of high frequency three-phase contactless electronic switch; Technical scheme is following: high frequency three-phase contactless electronic switch, and it comprises small-sized three-phase transformer, rectification voltage-controlled circuit, power electronic element, it is characterized in that: adopt the small-sized three-phase transformer that has an elementary winding and three secondary winding; Independent and insulation between winding; Through coupling, elementary winding alternation control signal is coupled on three secondary winding, obtains three control voltages; Through rectification voltage-controlled circuit control stream, be added to after the dividing potential drop on the power electronic element control board.Three secondary winding of small-sized three-phase transformer are connected on respectively on two contacts of three bridge rectifiers of rectification voltage-controlled circuit, and two other contact connects resistance R and capacitor C respectively, is connected with electronic device Q again, delivers to motor through the high frequency electric source of frequency converter.
The utility model has the advantages that: the switch long service life.Can under the control of one road signal, realize the threephase switch break-make.Under the situation of a frequency converter output, drive the break-make of multiple motors.
Description of drawings
Fig. 1 is the fundamental diagram of the utility model.
Fig. 2 is the utility model circuit theory diagrams.
Fig. 3 is the utility model profile sketch map.
Fig. 4 is the utility model electronic component scheme of installation.
Among the figure: 1. small-sized three-phase transformer (in have one elementary, three secondary), 2. the rectification voltage-controlled circuit,
3. power electronic element control board.
Embodiment
It is formed by connecting small-sized three-phase transformer, rectification voltage-controlled circuit, power electronic element; Employing has the small-sized three-phase transformer of an elementary winding and three secondary winding, and independent and insulation between winding is through coupling; Elementary winding alternation control signal is coupled on three secondary winding; Obtain three control voltages,, be added to after the dividing potential drop on the power electronic element control board through rectification voltage-controlled circuit control stream.Three secondary winding of small-sized three-phase transformer are connected on respectively on two contacts of three bridge rectifiers of rectification voltage-controlled circuit, and two other contact connects resistance R and capacitor C respectively, is connected with electronic device Q again, delivers to motor through the high frequency electric source of frequency converter.
Operation principle:
When the AC controling signal input is arranged, after small-sized three-phase transformer 1 transformation, export three tunnel voltage-controlled voltages, after 2 rectifications of rectification voltage-controlled circuit and dividing potential drop, send 3 control boards of power electronic element respectively to, make the conducting simultaneously of three elements.And the ABC three-phase voltage of frequency converter output inserted motor U, V, the work of W end motor.When exchanging control voltage and stop, because of three controlled stages of power electronic element do not have voltage-controlled voltage to end, motor can not get three-phase electricity and quits work.
Claims (2)
1. high frequency three-phase contactless electronic switch, it comprises small-sized three-phase transformer, rectification voltage-controlled circuit, power electronic element, it is characterized in that: adopt the small-sized three-phase transformer (1) that has an elementary winding and three secondary winding; Independent and insulation between winding; Through coupling, elementary winding alternation control signal is coupled on three secondary winding, obtains three control voltages; Through rectification voltage-controlled circuit (2) control stream, be added to after the dividing potential drop on the power electronic element control board (3).
2. high frequency three-phase contactless electronic switch according to claim 1; It is characterized in that: three secondary winding of small-sized three-phase transformer (1) are connected on respectively on two contacts of three bridge rectifiers of rectification voltage-controlled circuit (2); Two other contact connects resistance R and capacitor C respectively; Be connected with electronic device Q again, deliver to motor through the high frequency electric source of frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205069607U CN202364194U (en) | 2011-12-08 | 2011-12-08 | High-frequency three-phase contactless electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205069607U CN202364194U (en) | 2011-12-08 | 2011-12-08 | High-frequency three-phase contactless electronic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202364194U true CN202364194U (en) | 2012-08-01 |
Family
ID=46575347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205069607U Expired - Fee Related CN202364194U (en) | 2011-12-08 | 2011-12-08 | High-frequency three-phase contactless electronic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202364194U (en) |
-
2011
- 2011-12-08 CN CN2011205069607U patent/CN202364194U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20121208 |