CN102332851B - Forward/reverse interlocking device of motor - Google Patents
Forward/reverse interlocking device of motor Download PDFInfo
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- CN102332851B CN102332851B CN 201110243284 CN201110243284A CN102332851B CN 102332851 B CN102332851 B CN 102332851B CN 201110243284 CN201110243284 CN 201110243284 CN 201110243284 A CN201110243284 A CN 201110243284A CN 102332851 B CN102332851 B CN 102332851B
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Abstract
The invention provides a forward/reverse interlocking device of a motor. The device comprises a first branch, a second branch and a first switch, wherein the first branch comprises a first inverse unit, a first diode, a first relay and a first contactor; the second branch comprises a second inverse unit, a second diode, a second relay, a second switch and a second contactor; and the first switch is respectively connected with the input end of the first inverse unit and the input end of the second inverse unit. According to the forward/reverse interlocking device of the motor provided by the invention, by means of the matching of the first branch, the second branch and the first switch, when a controller is failed, the short-circuit condition of a three-phase alternating-current power can be avoided; in the event of forwarding, the motor cannot inverse; and the forward/reverse interlocking device of the motor is safe, reliable, simple in structure, economical, practical and easy for realization.
Description
Technical field
The present invention relates to the Motor Control technology, relate in particular to a kind of motor rotating interlock.
Background technology
Motor has been widely used in the various equipments of industrial product.In the occasion of practical application motor, according to the actual conditions of using motor is carried out rotating control.For guaranteeing that any time motor can only forward or reverse, need to use the logical interlock circuit carry out rotating control to motor.The function of logical interlock circuit is to limit turning to of motor, guarantees can not reverse when motor is just changeing, and can not just change during the motor counter-rotating, avoids the short circuit of three-phase alternating-current supply.
Fig. 1 is the structure chart of prior art motor rotating interlock, as shown in Figure 1, this interlock realizes that the principle of motor rotating interlocking is as follows: the closure signal of first K switch 1 and second switch K2 is by being that the control core device provides with PLC or DSP, V+ is the positive pole that the voltage input is provided to the coil 4 of the coil 3 of first contactor and second contactor, V-is the negative pole that the voltage input is provided to the coil 4 of the coil 3 of first contactor and second contactor, U, V, W is respectively the three-phase of three phase mains, controller provides closure signal for first K switch 1, closure signal is provided for second switch K2, first K switch, 1 closure, the coil 3 of first contactor gets electric adhesive, the normally-closed contact 2 of first contactor disconnects, normally opened contact 5 closures of first contactor, motor 15 and three phase mains are linked in sequence with first phase sequence, motor 15 is just changeing (when supposing motor 15 and three phase mains with being linked in sequence of first phase sequence, the rotation direction of motor 15 is forward), because the normally-closed contact 2 of first contactor disconnects, the coil 4 of second contactor can not get, the normally opened contact 6 of second contactor can not be closed, motor 15 and three phase mains can not being linked in sequence with second phase sequence, motor 15 can not reverse, and has guaranteed can not reverse when motor 15 is just changeing.
But, the motor rotating interlock of available technology adopting can cause following shortcoming: in industry spot, if situations such as equipment interference, controller failure, controller will send closure signal for simultaneously first K switch 1 and second switch K2, the disorder of the operating state of motor rotating interlock will be caused like this, the interlocking of the rotating of motor can not be guaranteed.
Summary of the invention
At above-mentioned defective, the invention provides a kind of motor rotating interlock.
Motor rotating interlock provided by the invention comprises:
First branch road, described first branch road comprises first rp unit, first diode, first relay and first contactor, described first rp unit comprises the anti-phase subelement that even number is connected successively, the output of described first rp unit is connected with the coil of described first relay by described first diode, the normally opened contact of described first relay is connected with the coil of described first contactor, and the normally opened contact of described first contactor and three phase mains are linked in sequence with first phase sequence;
Second branch road, described second branch road comprises second rp unit, second diode, second relay, second switch and second contactor, described second rp unit comprises the described anti-phase subelement that odd number is connected successively, the output of described second rp unit is connected with the coil of described second relay by second diode, the coil of the normally opened contact of described second relay, second switch and described second contactor is connected successively, the normally opened contact of described second contactor and described three phase mains being linked in sequence with second phase sequence;
First switch, described first switch are connected with the input of described first rp unit and the input of described second rp unit respectively.
Motor rotating interlock provided by the invention, cooperation by first branch road, second branch road and first switch, in the time of can guaranteeing controller failure, the situation of three-phase alternating-current supply short circuit can not take place, under the situation that motor is just changeing, can not reverse safe and reliable, simple in structure, economical and practical, the easy realization of motor rotating interlock of the present invention.
Description of drawings
Fig. 1 is the structure chart of prior art motor rotating interlock;
Fig. 2 is the structure chart of motor rotating interlock of the present invention.
Embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.
Fig. 2 is the structure chart of motor rotating interlock of the present invention, and as shown in Figure 2, this device comprises first branch road, second branch road and first K switch 1.
First branch road comprises first rp unit 11, the first diode D1, first relay and first contactor, first rp unit 11 comprises the anti-phase subelement that even number is connected successively, the output of first rp unit is connected with the coil 9 of first relay by the first diode D1, the normally opened contact 7 of first relay is connected with the coil 3 of first contactor, the normally opened contact 5 of first contactor and three phase mains being linked in sequence with first phase sequence, first relay comprises that the coil 9 of first relay and normally opened contact 7, the first contactors of first relay comprise the coil 3 of first contactor and the normally opened contact 5 of first contactor.
Second branch road comprises second rp unit 12, the second diode D2, second relay, second switch K2 and second contactor, second rp unit 12 comprises the anti-phase subelement that odd number is connected successively, the output of second rp unit is connected with the coil 10 of second relay by the second diode D2, the normally opened contact 8 of second relay, the coil 4 of second switch K2 and second contactor is connected successively, the normally opened contact 6 of second contactor and three phase mains being linked in sequence with second phase sequence, second relay comprises that the coil 10 of second relay and normally opened contact 8, the second contactors of second relay comprise the coil 4 of second contactor and the normally opened contact 6 of second contactor.
First K switch 1 is connected with the input of first rp unit 11 and the input of second rp unit 12 respectively.
The operation principle of the rotating of motor rotating interlock control motor of the present invention is used in following mask body introduction.
Be that the control core device provides closure signal for first K switch 1 with PLC or DSP, controller provides the voltage input for first rp unit 11 and second rp unit 12 simultaneously, one end of the coil 9 of first relay need be connected with the first diode D1, the other end ground connection of the coil 9 of first relay, one end of the coil 10 of second relay is connected with the second diode D2, the other end ground connection of the coil 10 of second relay.
At this moment, with reference to Fig. 2, the normally opened contact 7 of first relay, the coil 3 of first contactor and power supply constitute the loop, the coil 4 of the normally opened contact 8 of second relay, second switch K2, second contactor and this power supply also constitute a loop, wherein, V+ is the positive pole of this power supply, and V-is the negative pole of this power supply; Also can be, one end of the normally opened contact 7 of first relay is connected with an end of the coil 3 of first contactor, the other end of the normally opened contact 7 of first relay is connected with the interface of controller output positive voltage, the other end ground connection of the coil 3 of first contactor, one end of the normally opened contact 8 of second relay is connected with the end of second switch K2, the other end of the normally opened contact 8 of second relay is connected with the interface of controller output positive voltage, one end of the coil 4 of second contactor is connected with the other end of second switch K2, the other end ground connection of the coil 4 of second contactor.The above-mentioned coil 4 of having enumerated the coil 3 of giving first contactor and second contactor provides two kinds of electric connecting modes of voltage, the mode that other can also be arranged certainly, as long as can guarantee, normally opened contact 7 closures at first relay, normally opened contact 8 closures of second relay, under the situation of second switch K2 closure, the coil 3 of first contactor and the coil 4 of second contactor can have the voltage input to get final product, and do not list one by one here.
Output with first rp unit 11 is connected with the anode of the first diode D1, and the anode of the output of second rp unit 12 and the second diode D2 is connected to example, introduces the course of work of motor rotating interlock of the present invention.The interface of one end of first K switch 1 and the output forward voltage of controller is connected, the other end of first K switch 1 is connected with the input of first rp unit 11 and the input of second rp unit 12 respectively, one end of the coil 9 of first relay is connected with the negative electrode of the first diode D1, the other end ground connection of the coil 9 of first relay, one end of the coil 10 of second relay is connected with the negative electrode of the second diode D2, the other end ground connection of the coil 10 of second relay.If controller provides closure signal to first K switch 1, first K switch, 1 closure then, the input voltage of first rp unit 11 is positive voltage, the output voltage of first rp unit 11 also is positive voltage, the first diode D1 conducting, the coil 9 of first relay gets electric adhesive, normally opened contact 7 closures of first relay.The coil 3 of first contactor gets electric adhesive, normally opened contact 5 closures of first contactor, motor 15 and three phase mains are linked in sequence with first phase sequence, and motor 15 is just changeing (supposing that the rotation direction of motor 15 is forward when the connected mode of above-mentioned motor 15 and three phase mains).
At this moment, if controller provides closure signal for second switch K2, the coil 4 of second contactor can not get electric, and the normally opened contact 6 of second contactor can not be closed, motor 15 and three phase mains can not be with being linked in sequence of second phase sequence, and motor 15 can not reverse.Even, because the fault of controller provides closure signal for simultaneously first K switch 1 and second switch K2, also can guarantee can not reverse when motor 15 is just changeing, reason is described below.
Controller provides closure signal to first K switch 1, first K switch, 1 closure, the input voltage of second rp unit 12 is positive voltage, the output voltage of second rp unit 12 is negative voltage, the second diode D2 ends, the coil 10 of second relay can not get, the normally opened contact 8 of second relay can not be closed, even second switch K2 closure, the coil 4 of second contactor also can not get, the normally opened contact 6 of second contactor can not be closed, and then motor 15 and three phase mains can not be with being linked in sequence of second phase sequence, and motor 15 can not reverse.
In the above-mentioned description, controller provides the voltage input for first rp unit 11 and second rp unit 12, certainly, can the voltage input be provided for first rp unit 11 and second rp unit 12 by power supply, still be connected with the anode of the first diode D1 with the output of first rp unit 11 this moment, the anode of the output of second rp unit 12 and the second diode D2 is connected to example, introduces the course of work of motor rotating interlock of the present invention.One end of first K switch 1 and the positive pole of power supply are connected, the other end of first K switch 1 is connected with the input of first rp unit 11 and the input of second rp unit 12 respectively, one end of the coil 9 of first relay is connected with the negative electrode of the first diode D1, the other end of the coil 9 of first relay and the negative pole of power supply are connected, one end of the coil 10 of second relay is connected with the negative electrode of the second diode D2, and the other end of the coil 10 of second relay and the negative pole of power supply are connected.The concrete course of work is described below.
If controller provides closure signal to first K switch 1, first K switch, 1 closure then, the input voltage of first rp unit 11 is positive voltage, the output voltage of first rp unit 11 also is positive voltage, the first diode D1 conducting, the coil 9 of first relay gets electric adhesive, normally opened contact 7 closures of first relay.The coil 3 of first contactor gets electric adhesive, normally opened contact 5 closures of first contactor, and motor 15 and three phase mains are linked in sequence with first phase sequence, and motor 15 is just changeing.
At this moment, if controller provides closure signal for second switch K2, the coil 4 of second contactor can not get electric, and the normally opened contact 6 of second contactor can not be closed, motor 15 and three phase mains can not be with being linked in sequence of second phase sequence, and motor 15 can not reverse.Even, because the fault of controller provides closure signal for simultaneously first K switch 1 and second switch K2, also can guarantee can not reverse when motor 15 is just changeing, reason is described below.
Controller provides closure signal to first K switch 1, first K switch, 1 closure, the input voltage of second rp unit 12 is positive voltage, the output voltage of second rp unit 12 is negative voltage, the second diode D2 ends, the coil 10 of second relay can not get, the normally opened contact 8 of second relay can not be closed, even second switch K2 closure, the coil 4 of second contactor also can not get, the normally opened contact 6 of second contactor can not be closed, and then motor 15 and three phase mains can not be with being linked in sequence of second phase sequence, and motor 15 can not reverse.
Need to prove, the output of first rp unit 11 and the negative electrode of the first diode D1 can be connected, the output of second rp unit 12 is connected with the negative electrode of the second diode D2, the interface of one end of first K switch 1 and the output negative voltage of controller is connected, the other end of first K switch 1 is connected with the input of first rp unit 11 and the input of second rp unit 12 respectively, one end of the coil 9 of first relay is connected with the anode of the first diode D1, the other end ground connection of the coil 9 of first relay, one end of the coil 10 of second relay is connected with the anode of the second diode D2, the other end ground connection of the coil 10 of second relay; Or, the output of first rp unit 11 is connected with the negative electrode of the first diode D1, the output of second rp unit 12 is connected with the negative electrode of the second diode D2, the negative pole of power supply is connected with an end of first K switch 1, the other end of first K switch 1 is connected with the input of first rp unit 11 and the input of second rp unit 12 respectively, one end of the coil 9 of first relay is connected with the anode of the first diode D1, the other end of the coil 9 of first relay and the positive pole of this power supply are connected, one end of the coil 10 of second relay is connected with the anode of the second diode D2, and the other end of the coil 10 of second relay and the positive pole of this power supply are connected.
By above-mentioned technical scheme as can be known, motor rotating interlock of the present invention is by the cooperation of first branch road, second branch road and first switch, in the time of can guaranteeing controller failure, the situation of three-phase alternating-current supply short circuit can not take place, under the situation that motor is just changeing, can not reverse safe and reliable, simple in structure, economical and practical, the easy realization of motor rotating interlock of the present invention.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (2)
1. a motor rotating interlock is characterized in that, comprising:
First branch road, described first branch road comprises first rp unit, first diode, first relay and first contactor, described first rp unit comprises the anti-phase subelement that even number is connected successively, the output of described first rp unit is connected with the coil of described first relay by described first diode, the normally opened contact of described first relay is connected with the coil of described first contactor, and the normally opened contact of described first contactor and three phase mains are linked in sequence with first phase sequence;
Second branch road, described second branch road comprises second rp unit, second diode, second relay, second switch and second contactor, described second rp unit comprises the described anti-phase subelement that odd number is connected successively, the output of described second rp unit is connected with the coil of described second relay by second diode, the coil of the normally opened contact of described second relay, second switch and described second contactor is connected successively, the normally opened contact of described second contactor and described three phase mains being linked in sequence with second phase sequence;
First switch, described first switch are connected with the input of described first rp unit and the input of described second rp unit respectively.
2. motor rotating interlock according to claim 1 is characterized in that, the output of described first rp unit is connected with the anode of described first diode, and the output of described second rp unit is connected with the anode of described second diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243284 CN102332851B (en) | 2011-08-23 | 2011-08-23 | Forward/reverse interlocking device of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110243284 CN102332851B (en) | 2011-08-23 | 2011-08-23 | Forward/reverse interlocking device of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102332851A CN102332851A (en) | 2012-01-25 |
| CN102332851B true CN102332851B (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110243284 Expired - Fee Related CN102332851B (en) | 2011-08-23 | 2011-08-23 | Forward/reverse interlocking device of motor |
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| CN (1) | CN102332851B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103840717B (en) * | 2014-03-04 | 2017-12-29 | 李世雄 | Oil bath feeding machine controller |
| CN105914824A (en) * | 2016-05-13 | 2016-08-31 | 深圳市科陆电子科技股份有限公司 | Direct current non-polarized frame type charging device |
| CN106005358B (en) * | 2016-05-25 | 2019-07-09 | 江西洪都航空工业集团有限责任公司 | A kind of aircraft hatchcover interlocking control circuit |
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| CN1595792A (en) * | 2004-06-24 | 2005-03-16 | 王旭 | Semiconductor excitation system for synchronous generator |
| CN101623827B (en) * | 2009-08-14 | 2012-05-09 | 东华大学 | Positioning numerical control device and method used for bending machine tool |
| CN201498121U (en) * | 2009-09-22 | 2010-06-02 | 徐州工程学院 | Failure detecting experiment device of controlling circuit of electric motor |
| CN101860288B (en) * | 2010-05-20 | 2011-11-30 | 郑贵林 | Intelligent controller for three-phase motor |
| CN202178731U (en) * | 2011-08-23 | 2012-03-28 | 中国北车股份有限公司大连电力牵引研发中心 | Motor positive and negative rotation interlocking device |
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| CN102332851A (en) | 2012-01-25 |
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Owner name: CHINA CNR CORPORATION LIMITED Free format text: FORMER OWNER: DALIAN ELECTRIC TRACTION RESEARCH + DEVELOPMENT CENTER OF CHINA NORTH LOCOMOTIVE CO., LTD. Effective date: 20140401 |
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Free format text: CORRECT: ADDRESS; FROM: 116022 DALIAN, LIAONING PROVINCE TO: 100078 FENGTAI, BEIJING |
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Effective date of registration: 20140401 Address after: 100078 Beijing Fengtai District city park is a district 15 building Patentee after: China CNR Corporation Limited Address before: 116022 Shahekou, Liaoning, China No. 51 The Strip Patentee before: Dalian Electric Traction Research & Development Center of China North Locomotive Co., Ltd. |
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Granted publication date: 20131009 Termination date: 20200823 |