CN2687944Y - Control cabinet for three-phase alternating-cuttent motor - Google Patents
Control cabinet for three-phase alternating-cuttent motor Download PDFInfo
- Publication number
- CN2687944Y CN2687944Y CN 200420042322 CN200420042322U CN2687944Y CN 2687944 Y CN2687944 Y CN 2687944Y CN 200420042322 CN200420042322 CN 200420042322 CN 200420042322 U CN200420042322 U CN 200420042322U CN 2687944 Y CN2687944 Y CN 2687944Y
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- phase
- control
- thyristor
- alternating current
- switch
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Abstract
Disclosed is a control cabinet for a three-phase alternating-current motor, including a case provided with a control circuit inside and the control circuit consists of a first phase triggering switching circuit, a third phase triggering switching circuit, a control switch circuit, an input terminal of three-phase alternating current power lines and an output terminal of the three-phase alternating current power lines. The utility model is characterized in that reliability, operability and safety are greatly improved, explosion-proof performance is good, the utility model achieves being frequently started or stopped without influencing service life, and the superiority of the performances is presented in bad deserts; besides, the utility model has the function of automatically delayed start in the time of phase-missing, overflowing, overcurrent protection, being electrified again after powerdown, etc. The utility model is widely applied to bad environments: oil fields, mines, hoisting industry; compared with a traditional contactor, the utility model eliminates surge current and prolongs service life, and no energy is consumed to make electric power consumption effect obvious, so the utility model is provided with the prospect of wide application, popularization and visible economic benefit.
Description
One, technical field:
The utility model relates to the output-controlling device of three-phase alternating-current supply, is a kind of three phase alternating current motor control cubicle, is specially adapted to the power supply control of oil pumper.
Two, background technology:
In electric power and electrical system, the surge current of moment is the root that causes humorous pollution to electrical network.Alternating current can accurately be in the conducting of zero crossing place during load (especially inductive load) is connected for traditional contactor, contact response force under the mechanical type spring action of adding contactor is inconsistent, thereby produce tens of times surge current, cause mains by harmonics excessive, even can cause in electric power, the electrical system automatic control equipment malfunctioning, lead to bigger electric power accident.
The conventional AC contacts of contactor disconnects moment, and minimum because of contact distance, electric field strength is very big, produces a large amount of charged corpuscles between contact, forms scorching hot electron stream, produces arc discharge phenomenon (being commonly called as arcing), and it is very harmful.Though arc-extinguish chamber, arc-chute have certain effect, also be prone to the arc short-circuit that causes because of multiple reason.Wherein inappropriate with blow-out and arcing time serves as that this powerful short circuit current burns contactor at most, circuit breaker trip, even cause power supply facilities breaking-up accident.In addition, because the energy consumption of solenoid self, the energy consumption when working as the 160A contactor is 90W, can not underestimate in long-term its accumulated power consumption of occasion of using like this.
Three, summary of the invention:
The utility model provides a kind of three phase alternating current motor control cubicle, it has solved the surge current that traditional contactor produces and the drawback of the sparking arcing when disconnecting when adhesive, thereby its reliability is increased greatly, and low-power consumption even do not have energy consumption and produce when operate as normal.
The technical solution of the utility model realizes by following measure: a kind of three phase alternating current motor control cubicle, it comprises casing, control circuit is installed in casing, and this control circuit comprises the first phase trigger switch circuit, third phase trigger switch circuit, control switch circuit, three-phase ac power cord input and three-phase ac power cord output; The first phase trigger switch circuit is connected in first phase line of three-phase ac power cord, the first phase trigger switch circuit comprises first thyristor, second thyristor, first diac, second diac and control relay second contact, be serially connected in first phase line after first thyristor and the second thyristor inverse parallel, between the control end of first thyristor and second thyristor, be in series with control relay second normally opened contact, play a reversed role between the power input of the control end of first thyristor and first phase line and be associated with first diac, playing a reversed role between the power output end of the control end of second thyristor and first phase line is associated with second diac; Third phase trigger switch circuit is connected in the third phase line of three-phase ac power cord, third phase trigger switch circuit comprises the 3rd thyristor, the 4th thyristor, the 3rd diac, the 4th diac and control relay the 3rd normally opened contact, be serially connected in the third phase line after the 3rd thyristor and the 4th thyristor inverse parallel, between the control end of the 3rd thyristor and the 4th thyristor, be in series with control relay the 3rd contact, play a reversed role between the power input of the control end of the 3rd thyristor and third phase line and be associated with the 3rd diac, playing a reversed role between the power output end of the control end of the 4th thyristor and third phase line is associated with the 4th diac; The control switch circuit comprises the control coil and the control switch of control relay, and control coil and control switch series connection back join with the control power supply.
Above-mentioned control switch can comprise starting switch and shutdown switch, and starting switch and shutdown switch are in series.
Above-mentioned starting switch can be often drives button, opens first normally opened contact that the button two ends are parallel with control relay often, and shutdown switch can be normally closed button.
Its change over switch first output was in series with control switch again after above-mentioned control power supply can be connected in series change over switch, join with the control power supply behind the coil of change over switch second output series connection time-delay relay, the normally-closed contact of time-delay relay and the siren back that is in series is in parallel with the coil of time-delay relay, and connecting between the control coil of control relay and change over switch is connected to the normally opened contact of time-delay relay.
Above-mentioned three-phase alternating current source output terminal can be serially connected with the threephase motor comprehensive protection device, and the normally-closed contact of its threephase motor comprehensive protection device and control switch circuit are in series.
Ammeter can be installed in above-mentioned casing and be connected on the second phase power line.
Voltmeter can be installed in above-mentioned casing and be connected in parallel on the first phase power line and the third phase AC power cord.
The utlity model has following characteristics: reliability, operability, fail safe be improved greatly and explosion-proof performance splendid, can realize frequent starting or stop, not influencing the life-span; The superiority that in abominable desert Environment, manifests its performance more; Also can have phase shortage, overcurrent, overload protection, outage function such as automatic time delay unlatching when coming again.The utility model can be widely used in industries such as the abominable oil field, various places of environment, mine, lifting, compare with traditional contactor, it is owing to eliminated surge current, life-span significantly prolongs, add that no energy consumption thereby power savings are obvious, so it have application prospect widely and remarkable economic efficiency.
Four, description of drawings:
Accompanying drawing 1 is the contour structures schematic diagram of most preferred embodiment of the present utility model;
Accompanying drawing 2 is the circuit theory diagrams of most preferred embodiment of the present utility model;
Coding in the accompanying drawing is respectively: A; B; C is the three-phase alternating-current supply input; G1; G2; G3 and G4 are respectively first; two; three and four thyristors; D1; D2; D3 and D4 are respectively first; two; three and four diacs; J is the control coil of control relay; J1; J2 and J3 are respectively first of control relay; two and three normally opened contacts; D is a motor; RJ is threephase motor comprehensive protection device and normally-closed contact thereof; L is a current transformer, and QA is a starting switch, and TA is a shutdown switch; K is a change over switch; a is the input of K, and b is first output of K, and c is second output of K; SJ is the coil of time-delay relay; SJ1 is the normally opened contact of SJ, and SJ2 is the normally-closed contact of SJ, and FM is a siren.
Five, embodiment:
The utility model is not subjected to the restriction of following embodiment, can determine concrete execution mode according to the technical solution of the utility model and actual conditions.
Below in conjunction with most preferred embodiment and accompanying drawing the utility model is further described:
Shown in attached Fig. 1 and 2, this three phase alternating current motor control cubicle comprises casing, control circuit is installed in casing, and this control circuit comprises the first phase trigger switch circuit, third phase trigger switch circuit, control switch circuit, three-phase ac power cord input (being A, B, C) and three-phase ac power cord output; The first phase trigger switch circuit is connected in first phase line of three-phase ac power cord, the first phase trigger switch circuit comprises the first thyristor G1, the second thyristor G2, the first diac D1, the second diac D2 and the control relay second contact J2, be serially connected in first phase line after the first thyristor G1 and the second thyristor G2 inverse parallel, between the control end of the first thyristor G1 and the second thyristor G2, be in series with the control relay second normally opened contact J2, play a reversed role between the power input A of the control end of the first thyristor G1 and first phase line and be associated with the first diac D1, playing a reversed role between the power output end of the control end of the second thyristor G2 and first phase line is associated with the second diac D2; Third phase trigger switch circuit is connected in the third phase line of three-phase ac power cord, third phase trigger switch circuit comprises the 3rd thyristor G3, the 4th thyristor G4, the 3rd diac D3, the 4th diac D4 and control relay the 3rd normally opened contact J3, be serially connected in the third phase line after the 3rd thyristor G3 and the 4th thyristor G4 inverse parallel, between the control end of the 3rd thyristor G3 and the 4th thyristor G4, be in series with control relay the 3rd contact J3, play a reversed role between the power input C of the control end of the 3rd thyristor G3 and third phase line and be associated with the 3rd diac D3, playing a reversed role between the power output end of the control end of the 4th thyristor G4 and third phase line is associated with the 4th diac D4; The control switch circuit comprises the control coil J and the control switch of control relay, and control coil J and control switch series connection back join with the control power supply.Just can realize the output of three-phase alternating-current supply is controlled by control switch like this.
In order further to improve performance of the present utility model, as shown in Figure 2, can increase technical characterictic as described below as required: control switch can comprise starting switch QA and shutdown switch TA, starting switch QA and shutdown switch TA are in series, wherein, starting switch QA is preferably and often drives button, opens the first normally opened contact J1 that the button two ends are parallel with control relay often, and shutdown switch TA is preferably normally closed button; Its change over switch first output b was in series with control switch again after the control power supply can be connected in series change over switch K, join with the control power supply behind the coil JS of change over switch second output c series connection time-delay relay, the normally-closed contact JS2 of time-delay relay and the siren FM back that is in series is in parallel with the coil JS of time-delay relay, the normally opened contact JS1 that connects and be connected to time-delay relay between the control coil J of control relay and change over switch K; The three-phase alternating current source output terminal is serially connected with the threephase motor comprehensive protection device RJ of public offering on the market, and the normally-closed contact RJ and the control switch circuit of its threephase motor comprehensive protection device are in series; Ammeter is installed in casing and is connected on the second phase power line; Voltmeter is installed in casing and is connected in parallel on the first phase power line and the third phase AC power cord.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The utility model can be widely used in industries such as the abominable oil field, various places of environment, mine, lifting, compare with traditional contactor, it is owing to eliminated surge current, life-span significantly prolongs, add that no energy consumption thereby power savings are obvious, so it have application prospect widely and remarkable economic efficiency.
Claims (9)
1. three phase alternating current motor control cubicle, it is characterized in that comprising casing, control circuit is installed in casing, and this control circuit comprises the first phase trigger switch circuit, third phase trigger switch circuit, control switch circuit, three-phase ac power cord input and three-phase ac power cord output; The first phase trigger switch circuit is connected in first phase line of three-phase ac power cord, the first phase trigger switch circuit comprises first thyristor, second thyristor, first diac, second diac and control relay second contact, be serially connected in first phase line after first thyristor and the second thyristor inverse parallel, between the control end of first thyristor and second thyristor, be in series with control relay second normally opened contact, play a reversed role between the power input of the control end of first thyristor and first phase line and be associated with first diac, playing a reversed role between the power output end of the control end of second thyristor and first phase line is associated with second diac; Third phase trigger switch circuit is connected in the third phase line of three-phase ac power cord, third phase trigger switch circuit comprises the 3rd thyristor, the 4th thyristor, the 3rd diac, the 4th diac and control relay the 3rd normally opened contact, be serially connected in the third phase line after the 3rd thyristor and the 4th thyristor inverse parallel, between the control end of the 3rd thyristor and the 4th thyristor, be in series with control relay the 3rd contact, play a reversed role between the power input of the control end of the 3rd thyristor and third phase line and be associated with the 3rd diac, playing a reversed role between the power output end of the control end of the 4th thyristor and third phase line is associated with the 4th diac; The control switch circuit comprises the control coil and the control switch of control relay, and control coil and control switch series connection back join with the control power supply.
2. three phase alternating current motor control cubicle according to claim 1 is characterized in that control switch comprises starting switch and shutdown switch, and starting switch and shutdown switch are in series.
3. three phase alternating current motor control cubicle according to claim 2 is characterized in that starting switch for often driving button, leaves first normally opened contact that the button two ends are parallel with control relay often, and shutdown switch is normally closed button.
4. according to claim 1 or 2 or 3 described three phase alternating current motor control cubicles, its change over switch first output is in series with control switch again after it is characterized in that controlling the power series change over switch, join with the control power supply behind the coil of change over switch second output series connection time-delay relay, the normally-closed contact of time-delay relay and the siren back that is in series is in parallel with the coil of time-delay relay, and connecting between the control coil of control relay and change over switch is connected to the normally opened contact of time-delay relay.
5. according to claim 1 or 2 or 3 described three phase alternating current motor control cubicles, it is characterized in that the three-phase alternating current source output terminal is serially connected with the threephase motor comprehensive protection device, the normally-closed contact of its threephase motor comprehensive protection device and control switch circuit are in series.
6. three phase alternating current motor control cubicle according to claim 4 is characterized in that the three-phase alternating current source output terminal is serially connected with the threephase motor comprehensive protection device, and the normally-closed contact of its threephase motor comprehensive protection device and control switch circuit are in series.
7. according to claim 1 or 2 or 3 or 6 described three phase alternating current motor control cubicles, it is characterized in that being equipped with in the casing ammeter and be connected on the second phase power line; Or/and, voltmeter is installed in the casing and is connected in parallel on the first phase power line and the third phase AC power cord.
8. three phase alternating current motor control cubicle according to claim 4 is characterized in that being equipped with in the casing ammeter and is connected on the second phase power line; Or/and, voltmeter is installed in the casing and is connected in parallel on the first phase power line and the third phase AC power cord.
9. three phase alternating current motor control cubicle according to claim 5 is characterized in that being equipped with in the casing ammeter and is connected on the second phase power line; Or/and, voltmeter is installed in the casing and is connected in parallel on the first phase power line and the third phase AC power cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042322 CN2687944Y (en) | 2004-03-28 | 2004-03-28 | Control cabinet for three-phase alternating-cuttent motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042322 CN2687944Y (en) | 2004-03-28 | 2004-03-28 | Control cabinet for three-phase alternating-cuttent motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687944Y true CN2687944Y (en) | 2005-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420042322 Expired - Fee Related CN2687944Y (en) | 2004-03-28 | 2004-03-28 | Control cabinet for three-phase alternating-cuttent motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2687944Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522926A (en) * | 2011-12-19 | 2012-06-27 | 中冶美利纸业股份有限公司 | Device for separate delay starting of induced draft fans |
| CN107634693A (en) * | 2017-11-18 | 2018-01-26 | 襄垣县树元电器有限公司 | Motor SCR control device |
| CN113791344A (en) * | 2021-11-17 | 2021-12-14 | 西安西电高压开关有限责任公司 | Switching test loop and method for switching current of high-voltage isolating switch |
-
2004
- 2004-03-28 CN CN 200420042322 patent/CN2687944Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522926A (en) * | 2011-12-19 | 2012-06-27 | 中冶美利纸业股份有限公司 | Device for separate delay starting of induced draft fans |
| CN107634693A (en) * | 2017-11-18 | 2018-01-26 | 襄垣县树元电器有限公司 | Motor SCR control device |
| CN113791344A (en) * | 2021-11-17 | 2021-12-14 | 西安西电高压开关有限责任公司 | Switching test loop and method for switching current of high-voltage isolating switch |
| CN113791344B (en) * | 2021-11-17 | 2022-06-28 | 西安西电高压开关有限责任公司 | Switching test loop and method for switching current of high-voltage isolating switch |
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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 |