CN203205842U - Phase-sequence protection system for three-phase asynchronous motor of numerically-controlled machine tool - Google Patents
Phase-sequence protection system for three-phase asynchronous motor of numerically-controlled machine tool Download PDFInfo
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- CN203205842U CN203205842U CN 201320219194 CN201320219194U CN203205842U CN 203205842 U CN203205842 U CN 203205842U CN 201320219194 CN201320219194 CN 201320219194 CN 201320219194 U CN201320219194 U CN 201320219194U CN 203205842 U CN203205842 U CN 203205842U
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Abstract
The utility model relates to a phase-sequence protection system for a three-phase asynchronous motor of a numerically-controlled machine tool. The phase-sequence protection system is characterized by comprising a PLC controller (1), a main relay (KA1), a forward rotational intermediate relay (KA3), a reverse rotational intermediate relay (KA4), a forward rotational AC contactor (KM4), a reverse rotational AC contactor (KM5) and a three-phase AC power supply thick-film phase-sequence protection device (2), wherein an input end of the three-phase AC power supply thick-film phase-sequence protection device (2) is connected with a three-phase power supply, an output end thereof is connected with an X2.4 pin of the PLC controller (1) through the main relay (KA1), a normally open contact of the forward rotational intermediate relay (KA3) is triggered by a Y1.2 pin of the PLC controller (1) to actuate, so that a main contact of the forward rotational rotation contactor (KM4) is electrified to actuate, thus a drive motor (3) is controlled to be electrified to perform positive rotation, a normally open contact of the reverse rotational intermediate relay (KA4) is triggered by a Y1.3 pin of the PLC controller (1) to be electrified to actuate, a main contact of the reverse rotational AC contactor (KM5) is electrified to actuate, and the drive motor (3) is controlled to be electrified to perform reverse rotation. The phase-sequence protection system is suitable for all numerically-controlled machine tools, and has the advantages of convenient usage, low cost and the like.
Description
Technical field
The utility model relates to a kind of Electrical Control Technology, and being used for of using in especially a kind of Digit Control Machine Tool prevents the not phase sequence control technology that is rotated of in accordance with regulations direction of three phase electric machine, specifically a kind of Digit Control Machine Tool threephase asynchronous machine phase sequence system.
Background technology
As everyone knows, the application of Digit Control Machine Tool is very extensive now, Digit Control Machine Tool generally all contains threephase asynchronous, and turning to by three phase sequences of threephase asynchronous determines, the phase sequence connection naked eyes of threephase asynchronous be can't see, often lathe manufacturer transfers machine according to the three-phase phase sequence of own workshop, but to the user that might the not reciprocity multiple situation of phase sequence, some producer uses phase-sequence meter to detect phase sequence, but phase-sequence meter such as improper use also can cause the accident; The phase sequence that phase sequence method of trying commonly used determines to access motor does not detect in some producer yet, but does not allow reversal connection at the threephase asynchronous that use is closed in some, thereby just can not try yet, in these occasions, and the correct decision phase sequence particular importance that just seems.If in lathe, add the phase sequence measuring ability, not only can solve the anti-phase problem of misphase but also can reduce a lot of unnecessary losses.
Summary of the invention
The purpose of this utility model is that it(?) still can counteragent behind the phase sequence wrong cause the problem of unnecessary loss for existing Digit Control Machine Tool drive motors, designs a kind of Digit Control Machine Tool threephase asynchronous machine phase sequence system that drive motors can't move when phase sequence is incorrect.
The technical solution of the utility model is:
A kind of Digit Control Machine Tool threephase asynchronous machine phase sequence system; it is characterized in that it comprises PLC controller 1; main relay (KA1); forward auxiliary relay KA3; counter-rotating auxiliary relay KA4; forward A.C. contactor KM4; counter-rotating A.C. contactor KM5 and three-phase ac power supply thick film phase sequence relay 2; the input termination three phase mains of three-phase ac power supply thick film phase sequence relay 2; its output connects the X2.4 pin of PLC controller 1 by main relay KA1; the Y1.2 pin of PLC controller 1 triggers the normally opened contact adhesive of forward auxiliary relay KA3; make the main contacts of forward A.C. contactor KM4 get electric adhesive; control drive motors 3 gets electric forward; the normally opened contact that the Y1.3 pin of PLC controller 1 triggers counter-rotating auxiliary relay KA4 gets electric adhesive; the main contacts of counter-rotating A.C. contactor KM5 gets electric adhesive, and drive motors 3 gets electric counter-rotating.
Described three-phase ac power supply thick film phase sequence relay 2 is TH221A type three-phase ac power supply thick film phase sequence relay.
The beneficial effects of the utility model:
The purpose that can't work when the utility model has realized that by the employing phase sequence relay threephase asynchronous wiring phase sequence is incorrect is conducive to the fail safe of protection system, and Accident prevention occurs.
The utility model circuit is simple, is easy to realize.
The characteristics such as the utility model is fit to all Digit Control Machine Tools, and it has easy to use, and is with low cost.
Description of drawings
Fig. 1 is the catenation principle figure of three-phase ac power supply thick film phase sequence relay of the present utility model and three phase mains.
Fig. 2 is PLC controller of the present utility model and the electrical schematic diagram that is connected of three-phase ac power supply thick film phase sequence relay.
Fig. 3 is the knife rest motor positive and inverse control electrical schematic diagram of the utility model embodiment.
Fig. 4 is PLC control ladder diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Shown in Fig. 1-4.
A kind of Digit Control Machine Tool threephase asynchronous machine phase sequence system; it comprises PLC controller 1; main relay (KA1); forward auxiliary relay KA3; counter-rotating auxiliary relay KA4; forward A.C. contactor KM4; counter-rotating A.C. contactor KM5 and three-phase ac power supply thick film phase sequence relay 2; the input termination three phase mains of three-phase ac power supply thick film phase sequence relay 2; as shown in Figure 1; its output connects the X2.4 pin of PLC controller 1 by main relay KA1; as shown in Figure 2; the Y1.2 pin of PLC controller 1 triggers the normally opened contact adhesive of forward auxiliary relay KA3; make the main contacts of forward A.C. contactor KM4 get electric adhesive; control drive motors 3 gets electric forward; the normally opened contact that the Y1.3 pin of PLC controller 1 triggers counter-rotating auxiliary relay KA4 gets electric adhesive; the main contacts of counter-rotating A.C. contactor KM5 gets electric adhesive, and drive motors 3 gets electric counter-rotating.As shown in Figure 3.Can to adopt model be the three-phase ac power supply thick film phase sequence relay of TH221A type to three-phase ac power supply thick film phase sequence relay 2 during implementation, and TH221A type three-phase ac power supply thick film phase sequence relay adopts advanced SMT technique to make.This protector function admirable, easy to use and reliable, volume is little and have protection against the tide, the advantage such as anticorrosion, can also automatically detect and indicate simultaneously three phase mains whether misphase or phase shortage, and not need the three-phase zero line, and its output can directly drive direct relay.When three-phase lack phase or phase sequence are undesired, utilize TH221A can cut off the electricity supply timely to reach the purpose of protection power source device.
Below in conjunction with Fig. 3,4 and Fa Nake knife rest control system the utility model is further described.
Fig. 3It is the knife rest control principle drawing of Fa Nake system, motor phase sequence connects instead when preventing tool changing, when carrying out the tool changing program, for preventing should the motor forward, because phase sequence has connect instead, cause the motor reversal stall, motor is caused the generation that damages phenomenon, adopted following control principle: PLC is first to triggering signal of Y1.2 pin output during tool changing, this triggering signal makes forward auxiliary relay KA3 get electric normally opened contact adhesive, thereby make forward A.C. contactor KM4 get electric main contacts adhesive, the knife rest drive motors gets electric, the feed of knife rest forward; During withdrawing, PLC is to triggering signal of Y1.3 pin output, and counter-rotating auxiliary relay KA4 gets electric normally opened contact adhesive, and counter-rotating A.C. contactor KM5 gets electric main contacts adhesive, and the knife rest drive motors gets electric counter-rotating, and knife rest withdraws from.
Fa Nake PLC ladder diagram as
Fig. 4Shown in, in triggering signal output pin Y1.2 output condition, add X2.4(KA1) normally opened contact, if phase sequence is not right when carrying out tool changing, KA1 can not get electric, X2.4 does not just have signal, the normally opened contact of X2.4 just can not connected in the ladder diagram, and knife rest drive motors 3 is electric with regard to not getting then, and phase sequence is anti-so just can not impact motor; If when phase sequence was correct when carrying out tool changing, KA1 got electric, X2.4 has signal, and the normally opened contact of X2.4 is connected in the ladder diagram, and Y1.2 connects, and KA3 gets electric, and knife rest motor forward realizes normal tool changing program.
The utility model does not relate to partly all, and the prior art that maybe can adopt same as the prior art is realized.
Claims (2)
1. Digit Control Machine Tool threephase asynchronous machine phase sequence system; it is characterized in that it comprises PLC controller (1); main relay (KA1); forward auxiliary relay (KA3); counter-rotating auxiliary relay (KA4); forward A.C. contactor (KM4); counter-rotating A.C. contactor (KM5) and three-phase ac power supply thick film phase sequence relay (2); the input termination three phase mains of three-phase ac power supply thick film phase sequence relay (2); its output connects the X2.4 pin of PLC controller (1) by main relay (KA1); the Y1.2 pin of PLC controller (1) triggers the normally opened contact adhesive of forward auxiliary relay (KA3); make the main contacts of forward A.C. contactor (KM4) get electric adhesive; control drive motors (3) gets electric forward; the normally opened contact that the Y1.3 pin of PLC controller (1) triggers counter-rotating auxiliary relay (KA4) gets electric adhesive; the main contacts of counter-rotating A.C. contactor (KM5) gets electric adhesive, and drive motors (3) gets electric counter-rotating.
2. Digit Control Machine Tool threephase asynchronous machine phase sequence according to claim 1 system is characterized in that described three-phase ac power supply thick film phase sequence relay (2) is TH221A type three-phase ac power supply thick film phase sequence relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320219194 CN203205842U (en) | 2013-04-26 | 2013-04-26 | Phase-sequence protection system for three-phase asynchronous motor of numerically-controlled machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320219194 CN203205842U (en) | 2013-04-26 | 2013-04-26 | Phase-sequence protection system for three-phase asynchronous motor of numerically-controlled machine tool |
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| Publication Number | Publication Date |
|---|---|
| CN203205842U true CN203205842U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320219194 Expired - Fee Related CN203205842U (en) | 2013-04-26 | 2013-04-26 | Phase-sequence protection system for three-phase asynchronous motor of numerically-controlled machine tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390046A (en) * | 2014-12-03 | 2015-03-04 | 山东开创电气有限公司 | Mining EOV (electrically operated valve) control system with phase order protection function |
-
2013
- 2013-04-26 CN CN 201320219194 patent/CN203205842U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390046A (en) * | 2014-12-03 | 2015-03-04 | 山东开创电气有限公司 | Mining EOV (electrically operated valve) control system with phase order protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20190426 |