CN101645683B - Variable frequency speed regulating system of high-frequency vibrating motor - Google Patents
Variable frequency speed regulating system of high-frequency vibrating motor Download PDFInfo
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- CN101645683B CN101645683B CN2009103074010A CN200910307401A CN101645683B CN 101645683 B CN101645683 B CN 101645683B CN 2009103074010 A CN2009103074010 A CN 2009103074010A CN 200910307401 A CN200910307401 A CN 200910307401A CN 101645683 B CN101645683 B CN 101645683B
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Abstract
A variable frequency speed regulating system of a high-frequency vibrating motor is disclosed, relating to construction tool. The motor in present system is incapable of achieving soft start and is liable to, while cessation, damage a frequency converter and arc in an AC contactor due to failing to forbid a branch control cabinet being closed on condition that the frequency converter is in operation, thus bringing potential safety jeopardy while raising the maintenance cost of system, and the interlock circuit is so complex as to be disadvantageous to inspection. A control circuit of the variable frequency speed control system comprises a detection circuit and a protection circuit, wherein, the detection circuit is provided with a signal detection end connected with a signal output end of the frequency converter, the detection circuit comprises a relay, the coil of which is serially connected in the detection circuit as well as a normally open contact and a normally closed contact of which are arranged in the protection circuit. The variable frequency speed control system of the high-frequency vibrating motor achieves the purpose of protecting the frequency converter and the AC contactor, prevents arc phenomenon of the AC contactor, enhances production safety while prolonging the service life of product, and has simple interlock circuit, which facilitates the inspection.
Description
[technical field]
The present invention relates to building implement, is variable frequency speed regulating system of high-frequency vibrating motor specifically, belongs to the railroad track infrastructure device field of making.
[background technology]
Dither motor frequency converter timing system is mainly used in the concrete prefabricated element construction of high-speed railway, highway, highway bridge, engineering construction.The motor of the branch control cabinet of the plural platform parallel connection that one cover dither motor frequency converter timing system comprises frequency converter, be connected with frequency converter, many parallel connections that are connected with branch control cabinet.All motors move simultaneously or stop simultaneously on concrete prefabricated mould of every branch control cabinet control, and each concrete prefabricated mould has 8～9 motors.For prolonging the useful life of assembly, require to accomplish when system works: 1, motor takes soft start with protection motor and frequency converter, starts branch control cabinet earlier, restarts frequency converter; 2, when stopping, closing frequency converter output earlier and close branch control cabinet again, prevent to occur between ac contactor contact the arcing phenomenon; 3, branch control cabinet interlocking when operation, promptly in the branch control cabinet that a frequency converter links to each other, only allow a branch control cabinet to get electric work, other branch control cabinet must cut off the power supply, if the user has started two branch control cabinets simultaneously, particularly second direct hard reboot of branch control cabinet is easy to cause the damage of frequency converter.Present system can not accomplish and the 2nd requirement at the 1st, causes frequency converter perishable, and the phenomenon of A.C. contactor arcing occurs, increases the maintenance cost of system, the useful life of having reduced system.For the 3rd requirement, normal at present employing A.C. contactor and the interlocking of A.C. contactor auxiliary contact, or adopt startup/stop button to be connected in series on the startup/stop button of this branch control cabinet with other branch control cabinet, circuit is very mixed and disorderly, make troubles to wiring, and break down easily, be not easy to maintenance.
[summary of the invention]
The technical assignment of the technical problem to be solved in the present invention and proposition is that the prior art scheme is improved and improved; a kind of variable frequency speed regulating system of high-frequency vibrating motor is provided; protection frequency converter, motor and A.C. contactor; to improve the life-span of system, guarantee that simultaneously system has only a branch control cabinet operation.For this reason, the present invention takes following technical scheme:
Variable frequency speed regulating system of high-frequency vibrating motor; comprise frequency converter; the branch control cabinet of the plural platform parallel connection that is connected with frequency converter; the motor and the control circuit thereof of the plural platform parallel connection that is connected with a branch control cabinet; each branch control cabinet includes an A.C. contactor; the main contacts of described plural platform A.C. contactor is connected in parallel; it is characterized in that: described control circuit comprises testing circuit and protective circuit; described testing circuit is provided with the input end; it is connected with a signal output part of frequency converter; testing circuit comprises a relay; relay coil is serially connected in the testing circuit, and the normally opened contact and the normally-closed contact of relay are located in the protective circuit.Testing circuit is used to detect the operating state of frequency converter, thereby guarantees: when frequency converter was worked, when the UVW that only refers to frequency converter had output, branch control cabinet can not be restarted and stop; When having only frequency converter to stop, when only referring to the UVW no-output of frequency converter, just allow the startup of branch control cabinet and stop.When the UVW of frequency converter has output, be example with Delta VFD300B43A frequency converter, detecting operation method has: A, can analog output and be arranged to sub-AFM of frequency output terminal and ACM by multimachine; B, by frequency setting analog signal terminal AVI and ACM; C, by numerical frequency lead-out terminal DFM and DCM; D, RS485 communication SG+ and SG-by frequency converter.The gain and loss electric control of being located at testing circuit repeat circuit coil is positioned at the protective circuit repeat circuit and often opens and the normally-closed contact state; reach the purpose of protection frequency converter and A.C. contactor; prevent the arcing phenomenon of A.C. contactor, when prolonging life of product, improve production security.Only need establish a testing circuit, one group of contact of relay is divided in the control circuit of each branch control cabinet.Circuit is simple, and maintenance is convenient.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature:
Described protective circuit comprises to be located at the interlock circuit between each branch control cabinet A.C. contactor and to be located at startup, halt circuit on each branch control cabinet, and the normally opened contact of described relay and normally-closed contact are located in described startup, the halt circuit.Start-up circuit is used for just allowing branch control cabinet to get electric operation only under the idle situation of frequency converter, reduces impact to frequency converter with the protection frequency converter; Halt circuit only is used for that branch control cabinet could dead electricity quit work under the idle situation of frequency converter, prevents the arcing of A.C. contactor; The startup of each branch control cabinet, halt circuit all are located in this branch control cabinet, and handled easily shortens circuit.One system only establishes an interlock circuit, does not adopt the startup/stop button or the A.C. contactor normally-closed contact of other branch control cabinet of serial connection in each branch control cabinet, and circuit is simple, is convenient to wiring and maintenance.
Described start-up circuit and halt circuit are connected in parallel and are serially connected with the coil of corresponding branch control cabinet A.C. contactor, and the normally opened contact of described relay is located in the start-up circuit, and the normally-closed contact of described relay is located in the halt circuit.Start-up circuit need guarantee that when frequency converter was worked, it was an off state, and frequency converter is not when working, after pressing startup/stop button, start-up circuit can constitute the loop, and the ac contactor coil of this branch control cabinet is got, the main contacts closure of corresponding A.C. contactor, this branch control cabinet gets.And halt circuit need guarantee that ac contactor coil has the electric current process always when frequency converter is worked, and the main contacts that guarantees this A.C. contactor is closed all the time, has only when frequency converter to quit work, press startups/stop button after, relay coil ability dead electricity.If frequency converter when work relay coil must not electricity, relay coil gets electricly when not working, and so: start-up circuit is connected with the normally opened contact (electric closure) of relay, and halt circuit is connected with normally-closed contact (electric disconnection).If it is electric that frequency converter when work relay coil gets, relay coil must not electricity when not working, and so: start-up circuit is connected with the normally-closed contact of relay, and halt circuit is connected with normally opened contact.
Be respectively equipped with startup/stop button in described start-up circuit and the halt circuit, two startup/stop buttons are one group of interlock button, being located at the startup/stop button of start-up circuit connects with the normally opened contact of relay, startup/stop button of being located at halt circuit is in parallel with the normally-closed contact of relay, and what described startup, halt circuit were serially connected with corresponding branch control cabinet A.C. contactor often drives auxiliary contact.When frequency converter and other branch control cabinet are not all worked, constitute the loop behind the normally opened contact of ac contactor coil, startup/stop button and relay that electric current can be by this branch control cabinet start-up circuit; Under the state of frequency converter and this branch control cabinet work, electric current can by ac contactor coil, the A.C. contactor of halt circuit often open auxiliary contact, startup/stop button or the relay normally-closed contact of parallel connection after constitute the loop.
Described interlock circuit comprises the A.C. contactor normally closed auxiliary contact of each serial connection, and the normally closed auxiliary contact of described each A.C. contactor starts with the branch control cabinet that is serially connected with corresponding ac contactor coil, the halt circuit parallel connection.When certain branch control cabinet in when operation, the normally-closed contact of A.C. contactor disconnects in this branch control cabinet, interlock circuit opens circuit, back branch control cabinet no current passes through, and has guaranteed that system has only a branch control cabinet in operation.
Described each branch control cabinet is equipped with power supply indicator, each power supply indicator and corresponding startup, halt circuit parallel connection.The operation of one branch control cabinet makes the interlock circuit that is connected with this control cubicle A.C. contactor normally closed auxiliary contact disconnect at this place, branch control cabinet after making it is in power failure state, power supply indicator all can not be bright, the information of clearly having reminded operator's branch control cabinet not start.
Beneficial effect:
1, a pair of signal output part at frequency converter connects a testing circuit; be located at the start and stop opportunity of the relay restriction branch control cabinet on the testing circuit; ac contactor coil only stops Shi Caineng at frequency converter and never switches on to switching to "on" position or switch to from energising and do not have "on" position in the branch control cabinet; A.C. contactor the arcing phenomenon can not occur; protect frequency converter simultaneously, guaranteed the A.C. contactor safe operation.Control is effective, and circuit is simple, is easy to safeguard.
2, the A.C. contactor normally closed auxiliary contact series connection of each branch control cabinet forms interlock circuit, the A.C. contactor normally closed auxiliary contact is in parallel with startup/stop button and power supply indicator, as long as a control cubicle is an operating state, then other control cubicle all can not start, reach the purpose of interlocking, circuit is simple, need not other A.C. contactor normally closed auxiliary contact or startup/stop button of serial connection on the start-up circuit of each branch control cabinet, in the system that has many branch control cabinet parallel connections, can significantly reduce the complexity of wiring, improve wiring efficient, easy access, safeguard.
[description of drawings]
Fig. 1 is the syndeton schematic diagram of frequency converter of the present invention and branch control cabinet.
Fig. 2 is that a branch control cabinet of the present invention is electrically connected schematic diagram.
Fig. 3 is the another kind of syndeton schematic diagram of testing circuit of the present invention.
[embodiment]
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
As shown in Figure 1, the motor and the control circuit thereof of the branch control cabinet 4 of the plural platform parallel connection that the present invention includes frequency converter 2, is connected, the plural platform parallel connection that is connected with a branch control cabinet 4 with frequency converter 2, each branch control cabinet 4 includes an A.C. contactor 7, the main contacts 14 of plural number platform A.C. contactor 7 is connected in parallel, and is connected with the output 6 of A.C. contactor 7 main contactss 14 of this branch control cabinet 4 behind the motor parallel of same branch control cabinet.Control circuit comprises testing circuit and protective circuit; testing circuit is provided with the input end; it is connected with a pair of signal output part MO1, the MCM of frequency converter 2; testing circuit comprises a relay 12; relay coil 9 is serially connected in the testing circuit, and the normally opened contact 11 and the normally-closed contact 10 of relay 12 are located in the protective circuit.Contain the frequency conversion indication output interface MO1 that turning round in frequency converter 2 main frames 2, connected current-limiting resistance R1, the positive pole that connects coil 9 in the relay 12 simultaneously, the current-limiting resistance R1 other end has connected the 24V power positive end, and the negative pole of coil 9 connects the negative pole of 24V in the relay 12.The input end of testing circuit can also and by multimachine can analog output and be arranged to frequency output AFM and ACM, by frequency setting analog signal AVI and ACM; Link to each other with frequency converter 2 signal output parts such as SG-by numerical frequency lead-out terminal DFM and DCM, RS485 communication SG+ by frequency converter 2.In the figure, relay 12 is when frequency converter 2 work, and its coil must not.
As shown in Figure 2; protective circuit comprises to be located at the interlock circuit between each branch control cabinet 4 A.C. contactor 7 and to be located at startup, halt circuit on each branch control cabinet 4; start-up circuit and halt circuit are connected in parallel and are serially connected with the coil 8 of corresponding branch control cabinet 4 A.C. contactors; start-up circuit and halt circuit are connected in parallel and are serially connected with the coil 8 of corresponding branch control cabinet 4 A.C. contactors; the normally-closed contact 10 of relay 12 is located in the start-up circuit, and the normally opened contact 11 of relay 12 is located in the halt circuit.Be respectively equipped with startup/stop button in start-up circuit and the halt circuit, two startup/stop buttons are one group of interlock button, being located at the startup/stop button of start-up circuit connects with the normally opened contact 11 of relay 12, startup/stop button of being located at halt circuit is in parallel with the normally-closed contact 10 of relay 12, and what halt circuit was serially connected with corresponding branch control cabinet 4 A.C. contactors 7 often drives auxiliary contact 13.When frequency converter 2 and other branch control cabinet 4 are not all worked, the formation loops, normally opened contact 11 back of ac contactor coil 8, startups/stop button and relay 12 that electric current can be by these branch control cabinet 4 start-up circuits; Under the state of frequency converter 2 and this branch control cabinet 4 work, electric current can by ac contactor coil 8, the A.C. contactor 7 of halt circuit often open auxiliary contact 13, startups/stop button or the back formation loops of relay 12 normally-closed contacts 10 of parallel connection.
Interlock circuit comprises A.C. contactor 7 normally closed auxiliary contacts 3 of each serial connection, and the normally closed auxiliary contact 3 of each A.C. contactor 7 starts with the branch control cabinet that is serially connected with corresponding ac contactor coil 84, the halt circuit parallel connection.Each branch control cabinet 4 is equipped with power supply indicator 1, each power supply indicator 1 and corresponding startup, halt circuit parallel connection.
During work:
When certain branch control cabinet 4 in when operation, the normally closed auxiliary contact 3 of A.C. contactor 7 disconnects in this branch control cabinet 4,4 of back branch control cabinets do not have 220VL, and power supply indicator 1 all can not be bright in the back branch control cabinet 4, have clearly reminded operator's branch control cabinet 4 can not executable operations.When certain branch control cabinet 4 in when operation, if the operator removes to operate the branch control cabinet 4 also more preceding than this branch control cabinet 4,, can not form the loop because the 220VL-IN of this branch control cabinet 4 does not have.Guaranteed that system has only a branch control cabinet 4 in operation.
When frequency converter 2 at work, the operator switches to halted state with branch control cabinet 4, though the startup of branch control cabinet 4/stop button SB2 disconnects, but because system is also in operation, the negative pole or the low level of the coil 9 of relay 12, the not energising of coil 9 of relay 12, the normally-closed contact 10 of relay 12 is closed, the auxiliary contact 13 of often opening of A.C. contactor 7 also do not disconnect, thereby, the coil 8 of 220VL-IN by A.C. contactor 7 often driven auxiliary contact 13 to A.C. contactor 7 again, normally-closed contact 10 by relay 12 arrives 220VN at last, the 220V power supply also constitutes the loop, and other branch control cabinet 4 is because the auxiliary contact 13 of often opening of A.C. contactor 7 are Chang Kai and can not form the loop, thereby, the coil 8 of A.C. contactor 7 can not cut off the power supply, when frequency converter 2 stops, the normally-closed contact 10 of relay 12 becomes disconnection, at this moment the 220V power supply can not constitute the loop, simultaneously, because frequency converter 2 is out of service, so, the input 5 of A.C. contactor 7 does not have voltage, the coil 8 of A.C. contactor 7 is not have to disconnect under the voltage condition in the contact 14 of A.C. contactor 7, thereby, A.C. contactor 7 can not occur and disconnect the arcing phenomenon, guaranteed that the outage of A.C. contactor 7 is safe operations.
When frequency converter 2 is in operation, the normally opened contact 11 of relay 12 is in normally open, even startup/stop button closure in the branch control cabinet 4, can not the flow through coil 8 of A.C. contactor 7 of 220V power supply can not form the loop in this branch control cabinet 4, can not close in the contact 14 of A.C. contactor 7.Thereby, guaranteed that frequency converter 2 main frames 2 when operation, can not close A.C. contactor 7 contacts 14 of branch control cabinet 4, guaranteed the safe operation of A.C. contactor 7.
Embodiment two, and as shown in Figure 3, and embodiment one different being: relay 12 is when frequency converter 2 work, and its coil gets.So need corresponding relays 12 normally opened contacts 11 are located in the halt circuit, and relay 12 normally-closed contacts 10 be located in the start-up circuit.
Variable frequency speed regulating system of high-frequency vibrating motor shown in above Fig. 1,2,3 is specific embodiments of the invention; substantive distinguishing features of the present invention and progress have been embodied; can be according to the use needs of reality; under enlightenment of the present invention; it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection range of this programme.
Claims (6)
1. variable frequency speed regulating system of high-frequency vibrating motor, comprise frequency converter (2), the branch control cabinet (4) of the plural platform parallel connection that is connected with frequency converter (2), the motor and the control circuit of the plural platform parallel connection that is connected with a branch control cabinet (4), each branch control cabinet (4) includes an A.C. contactor (7), the main contacts (14) of described plural platform A.C. contactor (7) is connected in parallel, it is characterized in that: described control circuit comprises testing circuit and protective circuit, described testing circuit is provided with the input end, its signal output part with frequency converter (2) is connected, testing circuit comprises a relay (12), relay coil (9) is serially connected in the testing circuit, and the normally opened contact (11) and the normally-closed contact (10) of relay (12) are located in the protective circuit; Described protective circuit comprises to be located at the interlock circuit between each branch control cabinet (4) and the A.C. contactor (7) and to be located at startup, halt circuit on each branch control cabinet (4), and the normally opened contact (11) and the normally-closed contact (10) of described relay (12) are located in described startup, the halt circuit.
2. variable frequency speed regulating system of high-frequency vibrating motor according to claim 1, it is characterized in that: described start-up circuit and halt circuit are connected in parallel and are serially connected with the coil (8) of corresponding branch control cabinet (4) A.C. contactor, the normally opened contact (11) of described relay (12) is located in the start-up circuit, and the normally-closed contact (10) of described relay (12) is located in the halt circuit.
3. variable frequency speed regulating system of high-frequency vibrating motor according to claim 1, it is characterized in that: described start-up circuit and halt circuit are connected in parallel and are serially connected with the coil (8) of corresponding branch control cabinet (4) A.C. contactor, the normally-closed contact (10) of described relay (12) is located in the start-up circuit, and the normally opened contact (11) of described relay (12) is located in the halt circuit.
4. variable frequency speed regulating system of high-frequency vibrating motor according to claim 2, it is characterized in that: be respectively equipped with startup/stop button in described start-up circuit and the halt circuit, two startup/stop buttons are one group of interlock button, being located at the startup/stop button of start-up circuit connects with the normally opened contact (11) of relay (12), startup/stop button of being located at halt circuit is in parallel with the normally-closed contact (10) of relay (12), and what described halt circuit was serially connected with corresponding branch control cabinet (4) A.C. contactor (7) often drives auxiliary contact (13).
5. according to the described variable frequency speed regulating system of high-frequency vibrating motor of the arbitrary claim of claim 1-4, it is characterized in that: described interlock circuit comprises A.C. contactor (7) normally closed auxiliary contact (3) of each serial connection, and the normally closed auxiliary contact (3) of described each A.C. contactor (7) starts with the branch control cabinet that is serially connected with corresponding ac contactor coil (8) (4), the halt circuit parallel connection.
6. variable frequency speed regulating system of high-frequency vibrating motor according to claim 5 is characterized in that: described each branch control cabinet (4) is equipped with power supply indicator (1), each power supply indicator (1) and corresponding startup, halt circuit parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103074010A CN101645683B (en) | 2009-09-21 | 2009-09-21 | Variable frequency speed regulating system of high-frequency vibrating motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103074010A CN101645683B (en) | 2009-09-21 | 2009-09-21 | Variable frequency speed regulating system of high-frequency vibrating motor |
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| Publication Number | Publication Date |
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| CN101645683A CN101645683A (en) | 2010-02-10 |
| CN101645683B true CN101645683B (en) | 2011-11-30 |
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| CN2009103074010A Active CN101645683B (en) | 2009-09-21 | 2009-09-21 | Variable frequency speed regulating system of high-frequency vibrating motor |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332855A (en) * | 2011-05-25 | 2012-01-25 | 谢青云 | Motor control device for range hood |
| CN102332850B (en) * | 2011-09-21 | 2013-09-04 | 山东新风光电子科技发展有限公司 | Control method for restarting motor in rotating process |
| CN108181531B (en) * | 2018-01-17 | 2020-08-25 | 青岛海信日立空调***有限公司 | Test system and method |
| CN109632298B (en) * | 2018-12-25 | 2021-11-16 | 人本股份有限公司 | Loading and unloading test system for clutch bearing |
| CN112217422B (en) * | 2020-11-20 | 2022-05-17 | 中船华南船舶机械有限公司 | Control method of multi-motor electric control system |
| CN112737423B (en) * | 2020-12-23 | 2024-05-03 | 安徽卓朴智能装备股份有限公司 | Motor control circuit and control method of numerical control machine tool |
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHAOXING OIL-WOLONG VIBRATOR., CO., LTD. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20101027 Address after: 312300 No. 1801 Renmin West Road, Zhejiang, Shangyu Applicant after: Wolong Electric Group Co., Ltd. Co-applicant after: Shaoxing Oli-wolong Vibrator Co., Ltd. Address before: 312300 No. 1801 Renmin West Road, Zhejiang, Shangyu Applicant before: Wolong Electric Group Co., Ltd. |
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