CN205791480U - Envelope star control circuit - Google Patents
Envelope star control circuit Download PDFInfo
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- CN205791480U CN205791480U CN201620535176.1U CN201620535176U CN205791480U CN 205791480 U CN205791480 U CN 205791480U CN 201620535176 U CN201620535176 U CN 201620535176U CN 205791480 U CN205791480 U CN 205791480U
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Abstract
This utility model relates to circuit engineering field, discloses a kind of envelope star control circuit.In this utility model, envelope star control circuit comprises first control device, second control device, the first normal open switch, delay circuit and normally closed switch；First control device and the first normal open switch are in parallel with delay circuit after connecting；First control device and the first normal open switch are also in parallel with second control device after connecting, and second control device is also connected in parallel on delay circuit two ends；Wherein first control device is for controlling the catalyst of motor, and second control device is used for controlling normally closed switch and the first normal open switch；Normally closed switch is not closed at the catalyst of motor.So, normally closed switch is not closed at the catalyst of motor, effectively prevent the over current fault that converter output short-circuit causes, and further reduces the injury to converter.
Description
Technical field
This utility model relates to control circuit technical field, seals star control circuit particularly to one.
Background technology
Commonly used along with synchro traction machine, the envelope star control circuit playing a protective role traction machine is also widely studied.Envelope star control circuit is intended to power consumption when utilizing synchronous motor short circuit coil to supply electrically disconnected by motor on coil, so that motor runs with minimum speed average rate, effectively prevent the risk of up hypervelocity, play the effect of speed limit when emergency relief, it is ensured that the safety of traction machine.
Synchronization envelope star device the most on the market mainly has two kinds.The first is that the auxiliary contact using and running catalyst are as envelope star short-circuit device.The advantage of this scheme is low cost, control simple, but the sequence problem coordinated due to catalyst main contacts and auxiliary contact, in the case of traction machine brake hard, if the output electric current of converter does not completely cuts through, the contact of envelope star is closed the most, and this situation can cause converter output short-circuit, over current fault occurs, if things go on like this can cause the damage of converter.The second is the mode using and installing envelope star contactor additional, if but parameter arranges unreasonable or configuration error, when then can cause startup or braking, the envelope star actuating of relay is abnormal, causes the charged short circuit of converter or traction machine, over current fault or the risk of traction machine demagnetization occurs.
Utility model content
The purpose of this utility model is to provide a kind of envelope star control circuit so that effectively prevent the over current fault that converter output short-circuit causes, further reduces the injury to converter.
For solving above-mentioned technical problem, embodiment of the present utility model provides a kind of envelope star control circuit, is applied to the catalyst of motor, first control device, second control device, the first normal open switch, delay circuit and normally closed switch；
Described first control device is in parallel with described delay circuit after connecting with described first normal open switch；Described first control device is also in parallel with described second control device after connecting with described first normal open switch, and described second control device is also connected in parallel on described delay circuit two ends；
Wherein, described first control device is for controlling the catalyst of described motor, and described second control device is used for controlling described normally closed switch and described first normal open switch；Described normally closed switch is not closed at the catalyst of described motor.
This utility model embodiment is in terms of existing technologies, owing to comprising first control device 202, second control device the 204, first normal open switch 201, delay circuit and normally closed switch 101, when powering on, second control device 204 obtains electric, and meanwhile, the first normal open switch 201 preferentially closes, normally closed switch 101 disconnects, and first control device 202 obtains electric, the catalyst 102 of motor closes, electric motor operation；When power is off, first control device 202 dead electricity, the catalyst 102 of motor disconnects, and delay circuit is continuously second control device 204 and powers Preset Time, and after Preset Time, normally closed switch 101 closes, and the first normal open switch 201 disconnects.When normally closed switch 101 is opened, and the catalyst 102 of motor closes, circuit system just can be connected, and motor just can work.But owing to the first normal open switch is connected in control circuit, after only first normal open switch 201 Guan Bi, circuit system just can turn on (system obtains electric), therefore the catalyst 102 of motor be after the first normal open switch 201 Guan Bi just electric Guan Bi, normally closed switch 101 must be electrically disconnected.When after system cut-off, due to second control device 204 two ends and connect delay circuit, delay circuit can play the effect of time delay, second control device 204 is made to postpone Preset Time dead electricity again, therefore normally closed switch 101 also can postpone a period of time and is closed again, but the catalyst 102 of motor is due to already off during system cut-off, thus when the catalyst 102 not havinging motor does not also disconnect, the situation of normally closed switch 101 just Guan Bi.So, normally closed switch is not closed at the catalyst 102 of motor, effectively prevent the over current fault that converter output short-circuit causes, and further reduces the injury to converter.
It addition, the catalyst of described motor is the second normal open switch.
It addition, described first control device is first coil circuit, described second control device is the second coil circuit；Described first coil circuit is connected with described second normal open switch electromagnetism；Described second coil circuit is connected with described normally closed switch electromagnetism.By above-mentioned connected mode, coil circuit is set, controlled the folding of the second normal open switch, normally closed switch by the galvanomagnetic-effect of hot-wire coil, therefore, be possible not only to realize when power is off, by dump energy consumption on coil, can also realize envelope star circuit is automatically controlled simultaneously.
It addition, described normally closed switch comprises the first normally-closed contact and the second normally-closed contact, described second normal open switch also comprises the first normally opened contact, the second normally opened contact and the 3rd normally opened contact；Described first normally opened contact, the second normally opened contact and the 3rd normally opened contact are connected in parallel；Described first normally-closed contact is connected between described first normally opened contact and described second normally opened contact；Described second normally-closed contact is connected between described first normally opened contact and described 3rd normally opened contact.By above-mentioned connected mode, two normally-closed contacts are connected between three normally opened contacts, thus realize Y-connection, play the effect of envelope star protection.
It addition, envelope star control circuit also comprises diode；Diodes in parallel is at the two ends of above-mentioned second control device.This diode is mainly used to consume the reverse biased at coil two ends, and coil circuit plays the effect of protection.
It addition, the delay circuit in envelope star control circuit comprises electric capacity and resistance；Second control device two ends it are connected in parallel on after electric capacity is in series with a resistor.By the charging/discharging function of electric capacity, when system cut-off, the electric capacity in delay circuit can discharge the electric energy of former storage, continues power supply for above-mentioned coil, first normal open switch will not be turned off after a loss of power, normally closed switch also will not close the most at once, and now the catalyst of motor is already off, therefore, can ensure that after system cut-off, when the electric current of converter output does not completely cuts through, normally closed switch will not close, and does not haves converter output short-circuit.
It addition, be connected by flexible circuit conductor between second control device, the first normal open switch and delay circuit.Connected by flexible circuit conductor so that when in the winter time or using for a long time, wire will not be hardening aging, effectively prevent wire electric leakage, and further ensure the safety of circuit.
It addition, the area of the cross section of described flexible circuit conductor can be 2.5 square millimeters.
Accompanying drawing explanation
Fig. 1 is according to the structural representation sealing star loop in the first embodiment of the present utility model；
Fig. 2 is to control circuit diagram according to the envelope star in the first embodiment of the present utility model；
Fig. 3 is according to the second control device theory diagram in the second embodiment of the present utility model.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, each embodiment of the present utility model is explained in detail.But, it will be understood by those skilled in the art that in each embodiment of this utility model, in order to make reader be more fully understood that, the application proposes many ins and outs.But, even if there is no these ins and outs and many variations based on following embodiment and amendment, it is also possible to realize the application each claim technical scheme required for protection.
First embodiment of the present utility model relates to a kind of envelope star control circuit, it is applied to the catalyst 102 of motor, it is connected between mainboard and power supply, on and off switch 203 is connected between power supply and mainboard, specifically as shown in Fig. 1～2, this envelope star control circuit comprises first control device 202, second control device the 204, first normal open switch 201, delay circuit and normally closed switch 101；Wherein, first control device 202 is in parallel with delay circuit after connecting with the first normal open switch 201；First control device 202 is also in parallel with second control device 204 after connecting with the first normal open switch 201, and second control device 204 is also connected in parallel on delay circuit two ends, and normally closed switch 101 is connected between the catalyst 102 of motor and motor M；First control device is for controlling the catalyst 102 of motor, and second control device 204 is used for controlling normally closed switch and the first normal open switch 201；Normally closed switch 101 is not closed at the catalyst 102 of motor.
When powering on, second control device 204 obtains electric, and meanwhile, the first normal open switch 201 preferentially closes, and normally closed switch 101 disconnects, and first control device 202 obtains electric, and the catalyst 102 of motor closes, electric motor operation；When power is off, first control device 202 dead electricity, the catalyst 102 of motor disconnects, and delay circuit is continuously second control device 204 and powers Preset Time, and after Preset Time, normally closed switch 101 closes, and the first normal open switch 201 disconnects.When normally closed switch 101 is opened, and the catalyst 102 of motor closes, circuit system just can be connected, and motor just can work.But owing to the first normal open switch is connected in control circuit, after only first normal open switch 201 Guan Bi, circuit system just can turn on (system obtains electric), therefore the catalyst 102 of motor be after the first normal open switch 201 Guan Bi just electric Guan Bi, normally closed switch 101 must be electrically disconnected.When after system cut-off, due to second control device 204 two ends and connect delay circuit, delay circuit can play the effect of time delay, second control device 204 is made to postpone Preset Time dead electricity again, therefore normally closed switch 101 also can postpone a period of time and is closed again, but the catalyst 102 of motor is due to already off during system cut-off, thus when the catalyst 102 not havinging motor does not also disconnect, the situation of normally closed switch 101 just Guan Bi.So, normally closed switch is not closed at the catalyst 102 of motor, effectively prevent the over current fault that converter output short-circuit causes, and further reduces the injury to converter.
Fig. 1 gives the structural representation in envelope star loop, and converter is connected with motor M via the catalyst 102 of motor.Wherein, U, Y, W are the three-phase output end of converter, and U1, Y1, W1 are the three-phase input end of motor, and the catalyst 102 of motor is three normal open switch 1021, is connected between U and U1, Y and Y1, W and W1.
Specifically, first control device 202 is first coil circuit, and second control device 204 is the second coil circuit；First coil circuit and the second normal open switch electromagnetism connect；Second coil circuit is connected with normally closed switch 101 electromagnetism.When first coil circuit powers on, the second normal open switch Guan Bi, when first coil circuit dead electricity, the second normal open switch disconnects；When the second coil circuit powers on, normally closed switch 101 disconnects, and when the second coil circuit dead electricity, normally closed switch 101 closes.Wherein, normally closed switch is normally-closed contact, and the catalyst 102 of motor is the second normal open switch, and the second normal open switch is normally opened contact.When being energized to coil circuit, due to the galvanomagnetic-effect of conductive coil so that normally-closed contact disconnects, and is connected with normally opened contact, it is achieved that automatically controlling of envelope star circuit.
It addition, during as it is shown in figure 1, be embodied as, normally closed switch comprises the first normally-closed contact and the second normally-closed contact, specifically, below for the first normally-closed contact, above for the second normally-closed contact；Second normal open switch also comprises the first normally opened contact, the second normally opened contact and the 3rd normally opened contact, specifically, is followed successively by the first normally opened contact, the second normally opened contact, the 3rd normally opened contact from right to left.Wherein, first normally opened contact, the second normally opened contact and the 3rd normally opened contact are connected in parallel, the first following normally-closed contact is connected between the first normally opened contact and second normally opened contact of centre on right side, and the second normally-closed contact above is connected between the first normally opened contact and the 3rd normally opened contact in left side on right side.During system power supply, the first normal open switch 201 closes, and the first normally-closed contact and the second normally-closed contact disconnect, and the first normally opened contact, the second normally opened contact and the 3rd normally opened contact Guan Bi, converter forms path with motor, and whole system works.
Owing to the first normal open switch 201 and first control device 202 are series relationship, so in the case of the only first normal open switch 201 Guan Bi, first control device 202 could obtain electric.When system gives electricity, coil circuit obtains electric, and the second coil circuit controls the first normal open switch 201 and closes, and normally closed switch 101 disconnects, and the catalyst 102 of motor closes.Thus ensure that normally closed switch 101 will not be closed at the catalyst 102 of motor, the problem that can avoid the short circuit of converter.
It addition, at one delay circuit of second control device 204 two ends parallel connection, this delay circuit can be made up of electric capacity and resistant series.When systems are functioning properly, electric current charges to electric capacity, and electric capacity itself is equivalent to big resistance, and therefore the circuit at electric capacity place is equivalent to open circuit, does not interferes with the work of second control device 204.When after system cut-off, electric capacity in delay circuit can discharge the electric energy of storage when having electricity, power supply is continued for first coil circuit, the second coil circuit, first normal open switch 201 will not be turned off after a loss of power, normally closed switch 101 in Fig. 1 also will not close the most at once simultaneously, and now the catalyst 102 of motor is already off, therefore, after system cut-off, when the electric current of converter output does not completely cuts through, also can guarantee that normally closed switch 101 will not close, the problem not havinging converter output short-circuit.
It addition, in the specific implementation, between above-mentioned second control device the 204, first normal open switch 201 and delay circuit, flexible circuit conductor can be used to be connected, such as the flexible circuit conductor using cross-sectional area to be 2.5 square millimeters.When making in the winter time due to the reason of flexible circuit conductor self material or use for a long time, wire will not be hardening aging, effectively prevent the possibility of wire electric leakage, further ensures the safety of circuit.
In terms of existing technologies, owing to comprising first control device 202, second control device the 204, first normal open switch 201, delay circuit and normally closed switch 101, when powering on, first normal open switch 201 preferentially closes, and meanwhile, second control device 204 obtains electric, normally closed switch 101 disconnects, and first control device 202 obtains electric, the catalyst 102 of motor closes, electric motor operation；When power is off, first control device 202 dead electricity, the catalyst 102 of motor disconnects, and delay circuit is continuously second control device 204 and powers Preset Time, and after Preset Time, normally closed switch 101 closes, and the first normal open switch 201 disconnects.When normally closed switch 101 is opened, and the catalyst 102 of motor closes, circuit system just can be connected, and motor just can work.But owing to the first normal open switch is connected in control circuit, after only first normal open switch 201 Guan Bi, circuit system just can turn on (system obtains electric), therefore the catalyst 102 of motor be after the first normal open switch 201 Guan Bi just electric Guan Bi, normally closed switch 101 must be electrically disconnected.When after system cut-off, due to second control device 204 two ends and connect delay circuit, delay circuit can play the effect of time delay, second control device 204 is made to postpone Preset Time dead electricity again, therefore normally closed switch 101 also can postpone a period of time and is closed again, but the catalyst 102 of motor is due to already off during system cut-off, thus when the catalyst 102 not havinging motor does not also disconnect, the situation of normally closed switch 101 just Guan Bi.So, normally closed switch is not closed at the catalyst 102 of motor, effectively prevent the over current fault that converter output short-circuit causes, and further reduces the injury to converter.
Second embodiment of the present invention relates to a kind of envelope star control circuit.Second embodiment has done further improvement on the basis of the first embodiment, mainly thes improvement is that: a diode 301 in parallel at second control device two ends, as shown in Figure 3.
When normally working, due to diode 301 Opposite direction connection, therefore electric current is not by diode 301, and the coil circuit not affecting second control device normally works.When system cut-off, the second coil circuit can produce higher induction electromotive force, and owing to diode 301 and the second coil circuit constitute loop, therefore, diode 301 consumes the reverse biased that coil produces effectively, and coil circuit serves the effect of protection.On the other hand, second coil circuit and diode 301 constitute loop, can also continue to power to the second coil circuit, also ensure that the time that the normally closed switch 101 that above-mentioned second coil circuit controls closes can be later than the time that the catalyst 102 of motor is opened, also prevent the flow problem excessively that converter short circuit causes.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiment of the utility model, and in actual applications, can to it, various changes can be made in the form and details, without departing from spirit and scope of the present utility model.
Claims (8)
1. an envelope star control circuit, is applied to the catalyst of motor, it is characterised in that comprise: first control device, second control device, the first normal open switch, delay circuit and normally closed switch；
Described first control device is in parallel with described delay circuit after connecting with described first normal open switch；Described first control device is also in parallel with described second control device after connecting with described first normal open switch, and described second control device is also connected in parallel on described delay circuit two ends；
Wherein, described first control device is for controlling the catalyst of described motor, and described second control device is used for controlling described normally closed switch and described first normal open switch；Described normally closed switch is not closed at the catalyst of described motor.
Envelope star control circuit the most according to claim 1, it is characterised in that the catalyst of described motor is the second normal open switch.
Envelope star control circuit the most according to claim 2, it is characterised in that described first control device is first coil circuit, described second control device is the second coil circuit；
Described first coil circuit is connected with described second normal open switch electromagnetism；Described second coil circuit is connected with described normally closed switch electromagnetism.
Envelope star control circuit the most according to claim 3, it is characterised in that described normally closed switch comprises the first normally-closed contact and the second normally-closed contact, described second normal open switch also comprises the first normally opened contact, the second normally opened contact and the 3rd normally opened contact；
Described first normally opened contact, the second normally opened contact and the 3rd normally opened contact are connected in parallel；
Described first normally-closed contact is connected between described first normally opened contact and described second normally opened contact；
Described second normally-closed contact is connected between described first normally opened contact and described 3rd normally opened contact.
Envelope star control circuit the most according to claim 4, it is characterised in that described envelope star control circuit also comprises diode；
Described diodes in parallel is at the two ends of described second control device.
Envelope star control circuit the most according to claim 1, it is characterised in that described delay circuit comprises electric capacity and resistance；
Described second control device two ends it are connected in parallel on after described electric capacity is in series with a resistor.
Envelope star control circuit the most according to claim 1, it is characterised in that described second control device, described first normal open switch are connected by flexible circuit conductor between described delay circuit.
Envelope star control circuit the most according to claim 7, it is characterised in that the area of the cross section of described flexible circuit conductor is 2.5 square millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620535176.1U CN205791480U (en) | 2016-06-02 | 2016-06-02 | Envelope star control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620535176.1U CN205791480U (en) | 2016-06-02 | 2016-06-02 | Envelope star control circuit |
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| CN205791480U true CN205791480U (en) | 2016-12-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712644A (en) * | 2017-03-14 | 2017-05-24 | 无锡英威腾电梯控制技术有限公司 | Star-sealing loop of permanent-magnet synchronous motor, protection method and frequency converter thereof |
| CN109839862A (en) * | 2017-11-29 | 2019-06-04 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform solenoid valve control circuit, control device and control method |
| CN110255322A (en) * | 2019-07-04 | 2019-09-20 | 快意电梯股份有限公司 | Elevator seals star system |
| CN115402892A (en) * | 2022-08-24 | 2022-11-29 | 日立楼宇技术（广州）有限公司 | Control device and method |
-
2016
- 2016-06-02 CN CN201620535176.1U patent/CN205791480U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712644A (en) * | 2017-03-14 | 2017-05-24 | 无锡英威腾电梯控制技术有限公司 | Star-sealing loop of permanent-magnet synchronous motor, protection method and frequency converter thereof |
| CN109839862A (en) * | 2017-11-29 | 2019-06-04 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform solenoid valve control circuit, control device and control method |
| CN109839862B (en) * | 2017-11-29 | 2024-02-13 | 中国船舶重工集团公司第七一九研究所 | Ocean nuclear power platform electromagnetic valve control circuit, control device and control method |
| CN110255322A (en) * | 2019-07-04 | 2019-09-20 | 快意电梯股份有限公司 | Elevator seals star system |
| CN115402892A (en) * | 2022-08-24 | 2022-11-29 | 日立楼宇技术（广州）有限公司 | Control device and method |
| CN115402892B (en) * | 2022-08-24 | 2023-11-28 | 日立楼宇技术（广州）有限公司 | Control device and method |
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