CN102832798A - Powering buffering control circuit and control method thereof - Google Patents
Powering buffering control circuit and control method thereof Download PDFInfo
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- CN102832798A CN102832798A CN2012103123377A CN201210312337A CN102832798A CN 102832798 A CN102832798 A CN 102832798A CN 2012103123377 A CN2012103123377 A CN 2012103123377A CN 201210312337 A CN201210312337 A CN 201210312337A CN 102832798 A CN102832798 A CN 102832798A
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Abstract
An embodiment of the invention discloses a powering buffering control circuit and a control method thereof, and the control method is used for controlling the powering buffering control circuit. The powering buffering control circuit comprises a powering buffering circuit and a digital signal processor, wherein the powering buffering circuit comprises a main loop contactor, a buffering contactor and a buffering resistor. The buffering resistor is connected with the main loop contactor in parallel after being connected with the buffering contactor in series. The digital signal processor is connected with a control coil of the main loop contactor and a control coil of the buffering contactor so as to control connection or disconnection of the main loop contactor and the buffering contactor, so that the powering buffering circuit is controllable, and safety and reliability of the powering buffering circuit are improved.
Description
Technical field
The present invention relates to the frequency conversion equipment field, relate in particular to a kind of buffer circuit and control method thereof of powering on.
Background technology
Frequency conversion equipment (Variable-frequency Drive; VFD) be application of frequency conversion technology and microelectric technique, control the electric control appliance of alternating current motor, its needed supply voltage can be provided according to the actual needs of motor through changing machine operation supply frequency mode; And then reach purpose energy-conservation, speed governing; In addition, frequency conversion equipment also has a lot of defencive functions, like overcurrent, overvoltage, overload protection or the like; Along with improving constantly of industrial automatization, frequency converter has obtained using very widely.
All comprise the buffer circuit that powers in the prior art in the frequency conversion equipment; And frequency conversion equipment is general to adopt common AC side buffering scheme or the DC side buffering scheme that powers on that powers on; Yet; Use above two kinds of buffer circuits that power on to go up the primary demand that electric control can only be satisfied frequency conversion equipment, still exist following problem:
1) buffer circuit that powers on is uncontrollable, and after the frequency conversion equipment input powers on, the buffer circuit that powers on will be worked automatically, but this circuit can't be in system automation integrated, and have certain potential safety hazard.
2) in the frequency conversion equipment power up; Major loop contactor control signal will have big electric current and flow through rectification circuit and electrochemical capacitor, the easy overcurrent damage of the rectification circuit of frequency conversion equipment if misoperation occurs; Electrochemical capacitor also there is bigger rush of current, influences device lifetime.
3) in the frequency conversion equipment running, to break off if the major loop contactor occurs, the situation that back level load is broken off not yet can cause the resistance in the buffer circuit that powers on to damage, and cause other secondary failures.
Therefore, the buffer circuit that powers in the frequency conversion equipment of the prior art is uncontrollable, and fail safe and reliability are low, and is prone to cause the device failure in the frequency conversion equipment.
Summary of the invention
Advantages such as in view of this, the embodiment of the invention provides a kind of buffer control circuit and control method thereof of powering on, and is used for the power up of control of conversion equipment, has the reliability height, and fail safe is good.
The buffer control circuit that powers in the embodiment of the invention comprises:
Buffer circuit, digital signal processor power on;
Wherein, the said buffer circuit that powers on comprises major loop contactor, flexible coupling tentaculum, buffer resistance;
Said buffer resistance is parallelly connected with said major loop contactor after connecting with said flexible coupling tentaculum;
Said digital signal processor all links to each other with the control coil of said major loop contactor and the control coil of said flexible coupling tentaculum, to control the adhesive or the disconnection of said major loop contactor and said flexible coupling tentaculum.
Preferably, said flexible coupling tentaculum normally opened contact seals in the control coil of said major loop contactor, and said major loop contactor normally-closed contact seals in the control coil of said flexible coupling tentaculum.
Preferably; The said buffer circuit that powers on all links to each other with rectification circuit with said digital signal processor; And the voltage output end of the said buffer circuit that powers on is connected with the voltage input end of rectification circuit, and said digital signal processor is controlled the adhesive or the disconnection of said major loop contactor and said flexible coupling tentaculum according to the busbar voltage of the voltage output end of said rectification circuit.
Preferably, the voltage input end of the said buffer circuit that powers on is connected with the voltage output end of major loop air switch, and the voltage output end of said major loop air switch also links to each other with the input of said digital signal processor.
The control method of the buffer control circuit that powers in the embodiment of the invention comprises:
After frequency conversion equipment powered on, said digital signal processor sent the adhesive control signal controlling the adhesive of said flexible coupling tentaculum to said flexible coupling tentaculum, and the said buffer circuit that powers on is started working;
When the very first time section that presets finished, said digital signal processor obtained first busbar voltage on the said rectification circuit output end bus;
Judge that whether said first busbar voltage is more than or equal to first numerical value that presets;
If said first busbar voltage is more than or equal to said first numerical value that presets, then said digital signal processor sends the adhesive control signal to said major loop contactor;
Detect and judge the whether adhesive of said major loop contactor;
If detect the adhesive of said major loop contactor, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal breaking off said flexible coupling tentaculum, and finishes to power on buffering.
Preferably, said digital signal processor also comprised before said flexible coupling tentaculum transmission adhesive control signal is with the step of controlling the adhesive of said flexible coupling tentaculum:
Whether the three phase mains RST of voltage input end that judges the said buffer circuit that powers on is normal;
If the three phase mains RST of the voltage input end of the said buffer circuit that powers on is normal, then carries out said digital signal processor and send the adhesive control signal to control the step of said flexible coupling tentaculum adhesive to said flexible coupling tentaculum.
Preferably, said control method also comprises:
If said first busbar voltage is less than said first numerical value that presets, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
Preferably, said digital signal processor also comprises to the step that said major loop contactor sends the adhesive control signal before:
When the second preset time section finished, said digital signal processor obtained second busbar voltage on the said rectification circuit output end bus;
Judge that whether said second busbar voltage is more than or equal to the second value that presets;
If said second busbar voltage, is then carried out said digital signal processor sends step from the adhesive control signal to said major loop contactor more than or equal to the said second value that presets.
Preferably, said control method also comprises:
If said second busbar voltage is less than the said second value that presets, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
Preferably, said control method also comprises:
If detect the not adhesive of said major loop contactor, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
Can find out that from above technical scheme the embodiment of the invention has the following advantages:
Power on buffer control circuit by digital signal processor (Digital Signal Processor; DSP) control major loop contactor and the adhesive or the disconnection of flexible coupling tentaculum in the buffer circuit that power on; Wherein, the buffer resistance in the buffer circuit that powers on is parallelly connected with the major loop contactor after connecting with the flexible coupling tentaculum, through in the buffer circuit that powers on, adding the flexible coupling tentaculum; And control by digital signal processor; The feasible buffer circuit that powers on is controlled, has improved the fail safe and the reliability of the buffer circuit that powers on, and can avoid faults such as damage of rectification circuit overcurrent and buffer resistance damage.
Description of drawings
Fig. 1 is a frequency conversion equipment partial circuit structural representation in the embodiment of the invention;
Fig. 2 is the structural representation of the buffer circuit that powers in the embodiment of the invention;
Fig. 3 is a sketch map of the control method of the buffer control circuit that powers in the embodiment of the invention;
Fig. 4 is another sketch map of the control method of the buffer control circuit that powers in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of buffer control circuit and control method thereof of powering on; Be used for the buffering course that powers on of frequency conversion equipment is controlled; Have the reliability height, advantage such as fail safe is good can effectively avoid the rectification circuit overcurrent to damage and fault such as buffer resistance damage.
See also Fig. 1 and Fig. 2, Fig. 1 is a frequency conversion equipment partial circuit structural representation in the embodiment of the invention, and Fig. 2 is the structural representation of the buffer circuit that powers in the embodiment of the invention.
As shown in Figure 1, the frequency conversion equipment partial circuit comprises in the embodiment of the invention: and the buffer circuit 101 that powers on, digital signal processor (Digital Signal Processor, DSP) 102, major loop air switch 106 and rectification circuit 107.As shown in Figure 2, the buffer circuit 101 that powers on specifically also comprises major loop contactor 103, flexible coupling tentaculum 104 and buffer resistance 105.
In embodiments of the present invention, the buffer control circuit that powers on specifically comprises: the buffer circuit 101 that powers on, digital signal processor 102.
Wherein, in the buffer circuit 101 that powers on, buffer resistance 105 is parallelly connected with major loop contactor 103 after connecting with flexible coupling tentaculum 104; In addition, digital signal processor 102 all links to each other with the control coil of major loop contactor 103 and the control coil of flexible coupling tentaculum 104, with the adhesive or the disconnection of control major loop contactor 103 and flexible coupling tentaculum 104, to accomplish the power up of frequency conversion equipment.
In embodiments of the present invention, flexible coupling tentaculum 104 normally opened contacts seal in the control coil of major loop contactor 103, and major loop contactor 103 normally-closed contacts seal in the control coil of flexible coupling tentaculum 104.
In embodiments of the present invention; The voltage input end of buffer circuit 101 of powering on is connected with the voltage output end of the major loop air switch 106 of frequency conversion equipment, and when major loop air switch 106 was closed, frequency conversion equipment powered on; When major loop air switch 106 breaks off, the frequency conversion equipment outage.After frequency conversion equipment powers on; Digital signal processor 102 can be at the three-phase voltage RST of the voltage output end that detects major loop air switch 106 electric voltage frequency just often; Send the adhesive control signal to flexible coupling tentaculum 104; The feasible buffer circuit 101 that powers on is started working, and can effectively avoid the system failure that power supply causes to frequency conversion equipment under the abnormal situation of input voltage.
In embodiments of the present invention; The buffer circuit 101 that powers on all links to each other with the rectification circuit 107 of frequency conversion equipment with digital signal processor 102; The voltage output end of buffer circuit 101 of powering on is connected with the voltage input end of the rectification circuit 107 of frequency conversion equipment, and digital signal processor 102 can be according to the busbar voltage control major loop contactor 103 of detected rectification circuit 107 voltage output ends and the adhesive or the disconnection of flexible coupling tentaculum 104.
In embodiments of the present invention, but holding time parameter also in the digital signal processor 102 powers at frequency conversion equipment; And after buffer circuit 101 work that power on; Digital signal processor 102 is the acquisition time parameter from the memory of himself, and detects the busbar voltage of the voltage output end of rectification circuit 107 according to this time parameter, and according to the adhesive or the disconnection of this busbar voltage control major loop contactor 103 and flexible coupling tentaculum 104; Can effectively detect the overtime buffer failure of frequency conversion equipment; For example, if time parameter is 3 minutes, then after the buffer circuit 101 that powers on was worked 3 minutes; Obtain the busbar voltage of rectification circuit 107 outputs, and control the buffer circuit 101 that powers on according to this busbar voltage.
In embodiments of the present invention; In buffer circuit 101 power up that power on; After digital signal processor 102 obtains the busbar voltage of rectification circuit 107 voltage output ends according to time parameter; Under the situation of this busbar voltage more than or equal to the magnitude of voltage that presets, digital signal processor 102 will send the adhesive control signal to major loop contactor 103, and after definite major loop contactor 103 adhesives, send the disconnection control signal to flexible coupling tentaculum 104; To break off flexible coupling tentaculum 104, the damage that can effectively avoid rectification circuit 107 overcurrents to cause; In addition; Also can avoid in the frequency conversion equipment running 103 wrong diagnosis of major loop contactor to open other secondary failures of the damage and the initiation of the buffer resistance 105 that causes; Effectively raise the fail safe and the reliability of frequency conversion equipment, avoided the damage of rectification circuit 107 overcurrents and buffer resistance 105.
The buffer control circuit of describing in embodiment illustrated in fig. 1 for a better understanding of the present invention that powers on sees also Fig. 3, and the embodiment for the control method of the buffer control circuit that powers in the embodiment of the invention comprises:
301, after frequency conversion equipment powered on, digital signal processor 102 sent the adhesive control signal with 104 adhesives of control flexible coupling tentaculum to flexible coupling tentaculum 104, and the buffer circuit 101 that powers on is started working;
In the buffer control circuit that powers on of frequency conversion equipment shown in Figure 1; After major loop air switch 106 closures; Frequency conversion equipment powers on, and digital signal processor 102 sends the adhesive control signal to flexible coupling tentaculum 104, makes flexible coupling tentaculum 104 control coils get; 104 adhesives of flexible coupling tentaculum and its normally opened contact are with closure, and the buffer circuit 101 that powers on is started working.
302, when the very first time section that presets finished, digital signal processor 102 obtained first busbar voltage on the rectification circuit 107 output buses;
In embodiments of the present invention; Preserved time parameter in the memory of digital signal processor 102; This time parameter is the very first time section that presets, digital signal processor 102 obtains the very first time section that presets from memory after, and will be according to this very first time section timing of presetting; In that this presets when very first time section finishes, digital signal processor 102 will obtain first busbar voltage on the bus of rectification circuit 107 voltage output ends.
303, whether judge first busbar voltage more than or equal to first numerical value that presets, if then execution in step 304, if not, then execution in step 307.
304, digital signal processor 102 sends the adhesive control signal to major loop contactor 103;
In embodiments of the present invention; Digital signal processor 102 is after obtaining first busbar voltage; With whether judging this first busbar voltage more than or equal to first numerical value that presets, more than or equal to this first numerical value that presets, then digital signal processor 102 will send the adhesive control signal and give major loop contactor 103 as if this first busbar voltage; Wherein, first numerical value that presets can be the specified busbar voltage of the percentage that presets.For example: first numerical value that presets can be 50% specified busbar voltage.
305, detect and judge whether adhesive of major loop contactor 103, if then execution in step 306, if not, then execution in step 307.
306, digital signal processor 102 sends to flexible coupling tentaculum 104 and breaks off control signal with disconnection flexible coupling tentaculum 104, and finishes to power on buffering;
In embodiments of the present invention; Major loop contactor 103 receives after the adhesive control signal; The control coil of major loop contactor 103 gets electric its normally-closed contact of making and breaks off, 103 adhesives of major loop contactor, and digital signal processor 102 will detect and judge whether adhesive of major loop contactor 103; If digital signal processor 102 detects 103 adhesives of major loop contactor; To send to flexible coupling tentaculum 104 and break off control signal, and finish to power on buffering, and make frequency conversion equipment get into the normal standby state with disconnection flexible coupling tentaculum 104.
307, digital signal processor 102 sends to flexible coupling tentaculum 104 and breaks off control signal to break off flexible coupling tentaculum 104.
In embodiments of the present invention; If digital signal processor 102 detects not adhesive of major loop contactor 103, explain that then the buffer circuit 101 that powers on possibly break down, digital signal processor 102 will send to flexible coupling tentaculum 104 and break off control signals; To break off buffer control unit 104; In addition, also will send the fault alerting signal, frequency conversion equipment carried out trouble shooting to remind the staff.
In embodiments of the present invention; Power on buffer control circuit by digital signal processor 102 control power on major loop contactor 103 and the adhesive or the disconnection of flexible coupling tentaculum 104 in the buffer circuit 101; The feasible buffer circuit 101 that powers on is controlled; Improve the fail safe and the reliability of the buffer circuit 101 that powers on, can avoid faults such as damage of rectification circuit 107 overcurrents and buffer resistance 105 damages.
The control method of the buffer control circuit that powers among the embodiment sees also Fig. 4 for a better understanding of the present invention, and another embodiment for the control method of the buffer control circuit that powers in the embodiment of the invention comprises:
401, after frequency conversion equipment powers on, judge whether the three phase mains RST of voltage input end of the buffer circuit 101 that powers on is normal;
In the power on buffer control circuit and the buffer circuit 101 that powers on of Fig. 1 and frequency conversion equipment shown in Figure 2; After major loop air switch 106 closures, frequency conversion equipment powers on, and digital signal processor 102 will detect major loop air switch 106 voltage output ends; The three-phase voltage RST of voltage input end of buffer circuit 101 promptly powers on; Judge whether this three phase mains RST is normal, wherein, " normally " is meant amplitude and the requirement of the operating voltage that frequency satisfies frequency conversion equipment of the voltage of three phase mains RST.
402, when the three phase mains RST of the voltage input end of the buffer circuit 101 that powers on just often, digital signal processor 102 sends the adhesive control signals with 104 adhesives of control flexible coupling tentaculum to flexible coupling tentaculum 104, and makes the buffer circuit 101 that powers on start working;
In embodiments of the present invention; Detect when digital signal processor 102 buffer circuit 101 that powers on voltage input end three phase mains RST just often; Digital signal processor 102 will send the adhesive control signal to flexible coupling tentaculum 104; It is electric to make that flexible coupling tentaculum 104 control coils get, and flexible coupling tentaculum 104 normally opened contact closures are in attracting state, and the buffer circuit 101 that powers on is started working.
Need to prove, undesired if digital signal processor 102 detects the RST signal in embodiments of the present invention, explain that then the RST fault possibly appear in frequency conversion equipment, will send fault information or signal, carry out trouble shooting to remind operating personnel.For example:, perhaps control the flicker of alarm lamp and carry out trouble shooting to remind operating personnel through sending the warning voice of reporting to the police.
403, when the very first time section that presets finished, digital signal processor 102 obtained first busbar voltage on the rectification circuit 107 output buses;
In embodiments of the present invention; Digital signal processor 102 can obtain the very first time section that presets from its memory; And according to this very first time section timing of presetting; In this presets very first time during section, digital signal processor 102 will obtain first busbar voltage on the rectification circuit 107 voltage output end buses.For example, if the very first time section that presets is 1 minute, then digital signal processor 102 obtains first busbar voltage on the rectification circuit 107 voltage output end buses in flexible coupling tentaculum 104 adhesives end in 1 minute.
404, judge that first busbar voltage whether more than or equal to first numerical value that presets, if then execution in step 405, if not, then carries out 410;
405, when the second preset time section finishes, digital signal processor 102 obtains second busbar voltage on the rectification circuit 107 output buses;
406, whether judge second busbar voltage more than or equal to the second value that presets,, if not, then carry out 410 if then execution in step 407;
407, send the adhesive control signal to major loop contactor 103;
In embodiments of the present invention; Digital signal processor 102 can confirm whether frequency conversion equipment breaks down according to the size of busbar voltage; Concrete; Digital signal processor 102 judges that whether first busbar voltage is more than or equal to first numerical value that presets, for example: judge that this first busbar voltage is whether more than or equal to 50% specified busbar voltage.In embodiments of the present invention; If this first busbar voltage is more than or equal to first numerical value that presets; When the second preset time section finishes; Digital signal processor 102 will obtain second busbar voltage on the rectification circuit 107 output buses, and continue to judge that whether this second busbar voltage is more than or equal to the second value that presets, for example: judge that this second busbar voltage is whether more than or equal to 90% specified busbar voltage.
If second busbar voltage is more than or equal to the second value that presets, then digital signal processor 102 will send the adhesive control signal to major loop contactor 103.
Need to prove that in embodiments of the present invention, " first " " second " only is used to distinguish two different busbar voltages and two different numerical, and is not used in the qualification to technical scheme itself.And " very first time section that presets " " second preset time section " " first numerical value that presets " " second value that presets " in the embodiment of the invention all can be provided with according to actual conditions by operating personnel.
Need to prove; In embodiments of the present invention, the different busbar voltages constantly of 102 pairs two of digital signal processors have carried out detecting and judging, can operate as normal to confirm frequency conversion equipment; In practical application; Operating personnel can be provided with the number of times that digital signal processor 102 carries out the detection and the judgement of busbar voltage according to specific circumstances, so that better detect the fault of frequency conversion equipment, guarantee that frequency conversion equipment can normally move.
408, detect and judge whether adhesive of major loop contactor 103, if then execution in step 409, if not, then execution in step 410;
409, digital signal processor 102 sends to flexible coupling tentaculum 104 and breaks off control signal with disconnection flexible coupling tentaculum 104, and finishes to power on buffering;
In embodiments of the present invention; Major loop contactor 103 receives after the adhesive control signal of digital signal processor 102 transmissions, will carry out the adhesive operation, and digital signal processor 102 will whether adhesive detects to major loop contactor 103; If digital signal processor 102 detects 103 adhesives of major loop contactor; To send to flexible coupling tentaculum 104 and break off control signal with disconnection flexible coupling tentaculum 104, and finish to power on buffering, frequency conversion equipment gets into the normal standby state.
410, digital signal processor 102 sends to flexible coupling tentaculum 104 and breaks off control signal to break off flexible coupling tentaculum 104.
In embodiments of the present invention; When first busbar voltage during less than first numerical value that presets, overtime fault possibly appear cushioning in frequency conversion equipment, and digital signal processor 102 will send to flexible coupling tentaculum 104 and break off control signals to break off flexible coupling tentaculum 104; In addition; Digital signal processor 102 also will send prompting message or signal and give operating personnel, to remind operating personnel frequency conversion equipment carried out trouble shooting, for example: in first busbar voltage during less than first numerical value that presets; Trouble light on the frequency conversion equipment begins flicker, perhaps sends the warning of reporting to the police.
In addition; In embodiments of the present invention; When first busbar voltage more than or equal to first numerical value that presets, but second busbar voltage when presetting for second time period is during less than the second value that presets, overtime fault also possibly appear cushioning in frequency conversion equipment; Digital signal processor 102 will send to flexible coupling tentaculum 104 and break off control signal to break off flexible coupling tentaculum 104; In addition, digital signal processor 102 also will send prompting message or signal and give operating personnel, to remind operating personnel frequency conversion equipment carried out trouble shooting.
In embodiments of the present invention; If digital signal processor 102 detects not adhesive of major loop contactor 103; Explain that then the buffer circuit 101 that powers on possibly break down, digital signal processor 102 sends to flexible coupling tentaculum 104 and breaks off control signals to break off flexible coupling tentaculum 104, in addition; Digital signal processor 102 also will send prompting message or signal and give operating personnel, to remind operating personnel frequency conversion equipment carried out trouble shooting.
In embodiments of the present invention; Digital signal processor 102 sends the adhesive control signal to flexible coupling tentaculum 104 under the normal situation of definite three phase mains RST; It is electric to make that the control coil of flexible coupling tentaculum 104 gets, 104 adhesives of flexible coupling tentaculum, and the buffer circuit 101 that powers on is started working; Can effectively avoid the undesired frequency conversion equipment power supply that causes of three phase mains RST to break down; Improved the fail safe and the reliability of frequency conversion equipment, and because digital signal processor 102 can be controlled the buffer circuit 101 that powers on, the feasible buffer control circuit that powers on can carry out the system integration; In the buffering course that powers on, digital signal processor 102 can be respectively through the very first time section that presets and second preset time section to the detection and the judgement of busbar voltage, confirm whether frequency conversion equipment overtime fault occurs cushioning; Better to carry out fault detect, reduce the loss that the frequency conversion equipment fault is brought, in addition; During more than or equal to the second value that presets, digital signal processor 102 will send the adhesive control signals to major loop contactor 103, make the control coil of major loop contactor 103 get in second busbar voltage; Make busbar voltage set up rapidly; And after detecting 103 adhesives of major loop contactor, send to flexible coupling tentaculum 104 and to break off control signals, make the frequency conversion equipment normal standby; Through the mode of adhesive detection and electrical interlocks, can improve the reliability and the fail safe of frequency conversion equipment greatly.
Need to prove; For aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions; But those skilled in the art should know; The present invention does not receive the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that details among certain embodiment, can be referring to the associated description of other embodiment.
The those skilled in the art can be well understood to, for the convenience described with succinct, the concrete course of work of the method for foregoing description can repeat no more at this with reference to the corresponding process among the aforementioned means embodiment.In several embodiment that the application provided, should be understood that the apparatus and method that disclosed can realize that apparatus and method embodiment described above only is schematic through other mode.
More than a kind of buffer control circuit and control method thereof of powering on provided by the present invention carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the buffer control circuit that powers on is characterized in that, comprising:
Buffer circuit, digital signal processor power on;
Wherein, the said buffer circuit that powers on comprises major loop contactor, flexible coupling tentaculum, buffer resistance;
Said buffer resistance is parallelly connected with said major loop contactor after connecting with said flexible coupling tentaculum;
Said digital signal processor all links to each other with the control coil of said major loop contactor and the control coil of said flexible coupling tentaculum, to control the adhesive or the disconnection of said major loop contactor and said flexible coupling tentaculum.
2. the buffer control circuit that powers on according to claim 1 is characterized in that, said flexible coupling tentaculum normally opened contact seals in the control coil of said major loop contactor, and said major loop contactor normally-closed contact seals in the control coil of said flexible coupling tentaculum.
3. the buffer control circuit that powers on according to claim 1 and 2; It is characterized in that; The said buffer circuit that powers on all links to each other with rectification circuit with said digital signal processor; And the voltage output end of the said buffer circuit that powers on is connected with the voltage input end of rectification circuit, and said digital signal processor is controlled the adhesive or the disconnection of said major loop contactor and said flexible coupling tentaculum according to the busbar voltage of the voltage output end of said rectification circuit.
4. the buffer control circuit that powers on according to claim 3; It is characterized in that; The voltage input end of the said buffer circuit that powers on is connected with the voltage output end of major loop air switch, and the voltage output end of said major loop air switch also links to each other with the input of said digital signal processor.
5. the control method of the buffer control circuit that powers on is characterized in that, in each described buffer control circuit that powers on of claim 1 to 4, said control method comprises:
After frequency conversion equipment powered on, said digital signal processor sent the adhesive control signal controlling the adhesive of said flexible coupling tentaculum to said flexible coupling tentaculum, and the said buffer circuit that powers on is started working;
When the very first time section that presets finished, said digital signal processor obtained first busbar voltage on the said rectification circuit output end bus;
Judge that whether said first busbar voltage is more than or equal to first numerical value that presets;
If said first busbar voltage is more than or equal to said first numerical value that presets, then said digital signal processor sends the adhesive control signal to said major loop contactor;
Detect and judge the whether adhesive of said major loop contactor;
If detect the adhesive of said major loop contactor, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal breaking off said flexible coupling tentaculum, and finishes to power on buffering.
6. control method according to claim 5 is characterized in that, said digital signal processor sends the adhesive control signal to said flexible coupling tentaculum and also comprises before with the step of controlling the adhesive of said flexible coupling tentaculum:
Whether the three phase mains RST of voltage input end that judges the said buffer circuit that powers on is normal;
If the three phase mains RST of the voltage input end of the said buffer circuit that powers on is normal, then carries out said digital signal processor and send the adhesive control signal to control the step of said flexible coupling tentaculum adhesive to said flexible coupling tentaculum.
7. control method according to claim 5 is characterized in that, said control method also comprises:
If said first busbar voltage is less than said first numerical value that presets, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
8. according to each described control method of claim 5 to 7, it is characterized in that said digital signal processor also comprises to the step that said major loop contactor sends the adhesive control signal before:
When the second preset time section finished, said digital signal processor obtained second busbar voltage on the said rectification circuit output end bus;
Judge that whether said second busbar voltage is more than or equal to the second value that presets;
If said second busbar voltage, is then carried out said digital signal processor sends step from the adhesive control signal to said major loop contactor more than or equal to the said second value that presets.
9. control method according to claim 8 is characterized in that, said control method also comprises:
If said second busbar voltage is less than the said second value that presets, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
10. control method according to claim 5 is characterized in that, said control method also comprises:
If detect the not adhesive of said major loop contactor, then said digital signal processor sends to said flexible coupling tentaculum and breaks off control signal to break off said flexible coupling tentaculum.
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| CN201210312337.7A CN102832798B (en) | 2012-08-29 | 2012-08-29 | One powers on buffer control circuit and control method thereof |
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| CN201210312337.7A CN102832798B (en) | 2012-08-29 | 2012-08-29 | One powers on buffer control circuit and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457451A (en) * | 2013-08-22 | 2013-12-18 | 深圳市英威腾电气股份有限公司 | High-voltage frequency converter low voltage power-on control circuit and control method thereof |
| CN108199572A (en) * | 2017-12-25 | 2018-06-22 | 苏州英威腾电力电子有限公司 | A kind of frequency converter and its circuit breaking protective system |
| CN108923388A (en) * | 2018-08-17 | 2018-11-30 | 东菱技术有限公司 | A kind of fault detection circuit powering on buffer cell and method |
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| CN103457451A (en) * | 2013-08-22 | 2013-12-18 | 深圳市英威腾电气股份有限公司 | High-voltage frequency converter low voltage power-on control circuit and control method thereof |
| CN103457451B (en) * | 2013-08-22 | 2016-12-28 | 深圳市英威腾电气股份有限公司 | A kind of high-voltage frequency converter low voltage electrifying control circuit and control method thereof |
| CN108199572A (en) * | 2017-12-25 | 2018-06-22 | 苏州英威腾电力电子有限公司 | A kind of frequency converter and its circuit breaking protective system |
| CN108923388A (en) * | 2018-08-17 | 2018-11-30 | 东菱技术有限公司 | A kind of fault detection circuit powering on buffer cell and method |
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| CN102832798B (en) | 2015-09-16 |
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