CN2195826Y - Contactless automatic star/delta starter - Google Patents
Contactless automatic star/delta starter Download PDFInfo
- Publication number
- CN2195826Y CN2195826Y CN 94214884 CN94214884U CN2195826Y CN 2195826 Y CN2195826 Y CN 2195826Y CN 94214884 CN94214884 CN 94214884 CN 94214884 U CN94214884 U CN 94214884U CN 2195826 Y CN2195826 Y CN 2195826Y
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- CN
- China
- Prior art keywords
- star
- working plate
- motor
- utility
- model
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- Expired - Fee Related
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- Motor And Converter Starters (AREA)
Abstract
The utility model belongs to the control technique of a motor. The utility model is characterized in that the motor is connected with a star-shaped and a delta-shaped working plates. A set of controlled silicon and a photoelectric coupler are respectively connected with the working plate. A control circuit adopts a CMOS integrated circuit. When the utility model starts, the work is stable, the noise does not exist, and the interference for the electric network of the power supply is small. The utility model has the advantages that the work is reliable, the service life is long, the volume is small, the weight is light, and the cost is lower.
Description
The utility model relates to the Motor Control technology.
Can produce bigger starting current during asynchronous motor starting, this all has infringement to motor and power generating facilities and power grids, for this reason, generally use star-delta starter, promptly when motor starting, work, when motor speed is near rated speed by the time in the star connection mode, change delta connection work over to, thereby reduce the starting current of motor.
In the existing star-delta starter, the connection of main circuit and disjunction are finished by A.C. contactor.Star realized by the time relay to the conversion of triangle mode, usefulness all be the chattering type relay, but still have many defectives:
A.C. contactor is finished attracting process with mechanical action, because elastic vibration, pair of contact will be in adhesive firmly after the of short duration contact repeatedly, this process can cause spark phenomenon inevitably, and the moment of disjunction huge induced electromotive force tend to cause the arcing of contact, and the burning that the sparking of contact, arcing cause is melted, and the functional reliability of contact and working life are reduced.Particularly, have the interchange contact working life of contact shorter, and the element that often need more renew guarantee the reliability of work in the workplace that needs Fraquent start.On the other hand, use the moment of connection of uncontrollable main circuit of A.C. contactor and power generating facilities and power grids and disjunction, if that connects is instantaneous, be in the peak value of supply voltage, even motor is with star fashion work, the starting transient high-current still can make supply voltage produce than great fluctuation process, can produce power generating facilities and power grids and disturb and electromagnetic pollution, and existing star-delta starter volume is heavy greatly again, the cost height.
The purpose of this utility model provides the automatic star-delta starter of a kind of novel non-contact type, and it has fundamentally overcome chattering type star-delta starter hard reboot in use, sparking, shortcomings such as arcing and poor reliability.
The utility model is the contact that utilizes in the alternative A.C. contactor of electric power silicon-controlled device, by the silicon controlled conducting with end connection and the disjunction of finishing main circuit, adopt the photoelectrical coupler of the automatic measuring ability of band zero crossing to control the silicon controlled conducting and end, control circuit with the design of CMOS integrated circuit (IC)-components substitutes the time relay, finishes silicon controlled is triggered the work conversion and control that reaches from star fashion to the triangle mode.
Below in conjunction with accompanying drawing the utility model is illustrated it.
Accompanying drawing 1 is a structure chart of the present utility model.
Among the figure: 1---the three-phase plug-in strip, 2---controllable silicon, 3,13---photoelectrical coupler, 4---the triangle working plate, 5---control board, 6---the time is selected knob, 7---locking key, 8---starting button, 9---the star working plate, 10---motor, 11---transformer, 12---lead, 13---photoelectrical coupler.
Structure of the present utility model is: three-phase plug-in strip 1 is connected with motor 10 via lead 12, motor 10 is connected with triangle working plate 4 with star working plate 9 respectively by lead 12, working plate 4, connect 3-6 controllable silicon 2 on 9 respectively, on star working plate 9, be connected to photoelectrical coupler 13, it is connected with starting button 8 on the control board 5, is connected to photoelectrical coupler 3 on triangle working plate 4, and this coupler 3 is connected with time set knob 6 on the control board 5; One of transformer 11 terminates on the lead 12 of drawing from three-phase plug-in strip 1, and the other end is connected on the control board 5.
During work, three-phase plug-in strip 1 at first closes, electric current is exported 12V voltage and is given control board 5 behind transformer 11, triangle working plate 4 and star working plate 9 are in cut-off state at this moment, so though electric current passes through from motor 10, motor 10 is not worked, make motor 10 work, must press starting button 8, control section produces the forward high level like this, by the photoelectrical coupler on the triangle working plate 43, make all conductings simultaneously of three-phase controllable silicon 2 on the star working plate 9, make motor 10 with star fashion work, this moment, the 4 triggerings as yet of triangle working plate still remained on cut-off state.
The time of star fashion work is set by time knob 6, time is adjustable continuously by 0.5～50 second, finish when predefined time, the circuit operation in the control board makes the triggering level step-down of star working plate 9, the star working plate is by work, control board 5 sends a high level signal to triangle working plate 4, makes 4 conductings of triangle working plate, at this moment, motor 10 is worked under the triangle mode, thereby has finished star---the conversion of triangle working method.
When wanting power cut-off, only need press locking key 7, control board 5 is given star, and the signal of triangular plate 9,4 all is a low level, and two plates all end, the motor stall.
The utility model has the advantages that:
1. there are not the phenomenons such as sparking, arcing in no any mechanical contact in the main circuit, work noiselessness, vibration resistance;
2. the zero crossing self-checking function of photoelectrical coupler is always connected main circuit at power supply alternating voltage zero-crossing point, avoid starting instantaneous large-current to the impact of motor with to the interference of electric current electrical network;
3. the characteristic of utilizing the distinctive electric current of controllable silicon to end when keeping electric current, after stop signal is sent, main circuit can be waited until electric current just automatic disjunction near zero time, produce induced electromotive force so hardly, under rated condition, the long working life of semiconductor device, so reliable operation, long service life.
4. be specially adapted to the occasion of motor Fraquent start and braking, starting and braking all are processes stably, and to power supply, electrical network and space magnetic field disturb all minimum.
5. control circuit adopts cmos circuit, thereby is swift in motion accurately, and working stability is reliable.
6. volume is little, and is in light weight, and cost is low.
Claims (3)
1, the automatic star-delta starter of a kind of non-contact type is characterized in that, the three-phase plug-in strip is connected with motor through lead, and motor is connected with the triangle working plate with the star working plate respectively by lead again; On the star working plate, be connected to controllable silicon and photoelectrical coupler, this photoelectrical coupler is connected with starting button on the control board; Be connected to controllable silicon and photoelectrical coupler on the triangle working plate, this photoelectrical coupler is connected with time set knob on the control board; Transformer one terminates on the lead of drawing from the three-phase plug-in strip, and the other end is connected on the control board.
2, starter as claimed in claim 1 is characterized in that, the controllable silicon that is connected on star and the triangle working plate is 3---6.
3, starter as claimed in claim 1 is characterized in that, the control circuit on the control board adopts the CMOS integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214884 CN2195826Y (en) | 1994-06-03 | 1994-06-03 | Contactless automatic star/delta starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94214884 CN2195826Y (en) | 1994-06-03 | 1994-06-03 | Contactless automatic star/delta starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2195826Y true CN2195826Y (en) | 1995-04-26 |
Family
ID=33831029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94214884 Expired - Fee Related CN2195826Y (en) | 1994-06-03 | 1994-06-03 | Contactless automatic star/delta starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2195826Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973065A (en) * | 2013-01-18 | 2014-08-06 | 车王电子(宁波)有限公司 | Variable-structure motor and switching method thereof |
-
1994
- 1994-06-03 CN CN 94214884 patent/CN2195826Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973065A (en) * | 2013-01-18 | 2014-08-06 | 车王电子(宁波)有限公司 | Variable-structure motor and switching method thereof |
| CN103973065B (en) * | 2013-01-18 | 2016-09-07 | 车王电子(宁波)有限公司 | Variable structure motor and changing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |