CN103051204A - Special frequency converter for industrial vibrating rod - Google Patents
Special frequency converter for industrial vibrating rod Download PDFInfo
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- CN103051204A CN103051204A CN2012105465472A CN201210546547A CN103051204A CN 103051204 A CN103051204 A CN 103051204A CN 2012105465472 A CN2012105465472 A CN 2012105465472A CN 201210546547 A CN201210546547 A CN 201210546547A CN 103051204 A CN103051204 A CN 103051204A
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Abstract
The invention provides a special frequency converter for an industrial vibrating rod and belongs to the field of frequency converters. The special frequency converter comprises a rectification module, a loop absorption module, an inversion module and a driving module, wherein the loop absorption module comprises two polypropylene capacitors connected in parallel; the capacity of each polypropylene capacitor is 0.01-0.3muF; the driving module outputs SPWM (Sinusoidal Pulse Width Modulation) wave with adjustable pulse width so as to control the voltage and frequency of an alternating current output by the inversion module; and when the frequency converter is started, the SPWM wave output by the driving module ensures that the voltage and frequency of the alternating current output by the inversion module are increased to the working voltage and working frequency of the industrial vibrating rod in proportion, and then the output voltage and the output frequency are maintained. The special frequency converter starts the industrial vibrating rod by adopting a soft starting mode, and has the beneficial effects of lower cost and long service life.
Description
Technical field
The present invention relates to a kind of frequency converter, especially relate to a kind of industry vibrator special converter.
Background technology
On bridge on highway cast, railroad bridge cast, engineering construction pouring concrete, nearly all can see the shadow of industry vibrator, it gos deep into xoncrete structure by external motor, carry out therein dither, thereby concrete is filled up pattern, reduce cavity and slit in the concrete, finally reach concrete fastening effect.This good performance more and more obtains people to be approved widely and uses, and becomes gradually application apparatus indispensable on the industrial building.
Because the used vibrating head supply frequency of small and medium construction industry is 200Hz, power frequency supply can't provide this high frequency input, therefore, existing industrial vibrating head major part all is by the driven by engine high-rating generator, provides the 200Hz alternating current to go to drive its normal running work by generator again.Adopt such scheme, have following shortcoming: one, the concrete cast of engineering need to be carried out mobile operating constantly, and this just brings very large difficulty for the resettlement of generator for the user; Two, powering on suddenly of vibrating head not only causes great voltage fluctuation to electrical network, and its vibrating head motor internal also can be subject to the rush of current of moment, and the life-span of vibrating head will significantly shorten; Three: adopt the working method of driven by engine generator, input power factor is low, and utilization rate of electrical descends.
Summary of the invention
Technical problem to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes the industry vibrator special converter that a kind of vibration efficiency is high, the electric motor starting rush of current is little.
The technical scheme that technical solution problem of the present invention adopts is, a kind of industry vibrator special converter is provided, and it comprises rectification module, loop absorption module, inversion module and driver module; Described rectification module changes the alternating current of input into direct current; Described loop absorption module is the polypropylene capactive of two parallel connections, and described polypropylene capactive capacity is 0.01 to 0.3uF; The SPWM ripple that described driver module output pulse width is adjustable is with voltage and the frequency of the alternating current of control inversion module output; When frequency converter started, the SPWM ripple of described driver module output was so that the alternating current voltage of inversion module output and frequency directly proportionally are increased to the industry vibrator operating voltage and operating frequency then keeps this output voltage and frequency by 0.
Further, described rectification module comprises three diode branch in parallel, and every diode branch comprises two diode elements of series connection.
Further, described frequency converter also comprises the sampling resistor on the negative pole dc bus that is arranged at rectification module output, and control module; Described sampling resistor exports the sampled voltage signal to control module, and control module is this sampled voltage signal and predeterminated voltage signal relatively, stops to export the SPWM ripple if the sampled voltage signal is then controlled drive circuit greater than the predeterminated voltage signal.
Further, described inversion module comprises the inversion branch road of three parallel connections, and every inversion branch road comprises two inversion elements of series connection, and each inversion element comprises IGBT element and antiparallel diode element; Alternating current voltage and frequency that described SPWM ripple is exported to change inversion module by the switching rate that changes the IGBT element.
Further, described frequency converter also comprises power module, and described power module is arranged on the power panel, and described control module is arranged on the master control borad; Described power panel and other modules are arranged on the base plate, and described master control borad is erected in power panel the place ahead; Described power panel directly is electrically connected by base plate with other modules.
Further, described two polypropylene capactive capacity are identical, are 0.22uF.
The present invention has following beneficial effect:
1) change traditional large electric capacity filtration fraction into low capacity electric capacity, this low capacity electric capacity only needs to play the effect of simple clutter filtering and peak voltage absorption; After adopting low capacity electric capacity, the steady direct current of the non-traditional frequency converter rectification module output of the direct current of rectification module output, and be the direct current that still has certain pulsation, this direct current just in time can not meet the effect of failure of oscillation of industry vibrator; Therefore behind the low capacity electric capacity that adopts less cost, the operating efficiency of frequency converter of the present invention is high all the better;
2) adopt drive circuit output pulse width adjustable SPWM impulse form control inversion module output voltage and frequency, so that exporting voltage and the frequency of industry vibrator to, inversion module increases to gradually operating voltage and frequency, reduced the fluctuation of electrical network and instantaneous large-current for the impact of motor, be increased dramatically the useful life of vibrating head;
3) master control borad uprightly is fixed in the power panel front side, and power panel adopts hot base plate mode to be connected with other modules, and is simple in structure on the whole, occupy little space, assembling and mobile simple, convenient can realize fully that in the use of vibrating head a people operates separately, need not other people and assists.
Description of drawings
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Please refer to Fig. 1, Fig. 1 is the circuit theory schematic diagram of the present invention's one preferred embodiments.Among Fig. 1, industry vibrator special converter of the present invention comprises rectification module 10, loop absorption module 20, inversion module 30 and driver module 40.
Described rectification module 10 changes the alternating current of input into direct current; Described loop absorption module 20 is the polypropylene capactive C of two parallel connections, and described polypropylene capactive C capacity is 0.01 to 0.3uF; The SPWM ripple that described driver module 40 output pulse widths are adjustable is with voltage and the frequency of the alternating current of control inversion module 30 outputs; When frequency converter started, the SPWM ripple of described driver module 40 outputs was so that the alternating current voltage of inversion module 30 outputs and frequency directly proportionally are increased to the industry vibrator operating voltage and operating frequency then keeps this output voltage and frequency by 0.
Traditional frequency converter requires the voltage of stable output, therefore at the larger electrochemical capacitor of rectification module 10 rear common accesses to play filtering, the steadily galvanic effect of rectification module 10 outputs.Yet among the present invention, vibrating head need to be in vibrational state constantly, also namely require the voltage of frequency converter output and frequency along with the time constantly changes, so frequency converter of the present invention is less demanding for the galvanic evenness of rectification module 10 outputs.For these reasons, only to adopt the capacity of two parallel connections only be 0.01 to 0.3uF polyphenyl alkene electric capacity to loop of the present invention absorption module 20.These two polypropylene capactives only need to play simple clutter absorption and the crest voltage absorption gets final product.In a preferred embodiment, two polyphenyl alkene capacitances are identical, are 0.22uF.
Driver module 40 is by inside chip segment sync modulation output SPWM ripple, and this inside chip can be 89C51 single-chip microcomputer, 89C52 single-chip microcomputer or SA8281 chip etc.The pulsewidth of this SPWM ripple is adjustable.In a preferred embodiment, adjust in the following way the SPWM pulse duration of driver module output: utilize integrated chip to send sinusoidal modulation wave, utilize triangular-wave generator to send the triangular carrier signal; The intersection point that sinusoidal modulation wave and the acting in conjunction of triangular carrier signal form just can the not equidistant rectangular wave pulse of corresponding output constant amplitude, it is the SPWM ripple, if increase the modulation wave frequency, the square wave that generates in its both acting in conjunction unit interval becomes close thereupon, be that SPWM wave impulse width reduces, voltage and the frequency of inversion module 30 outputs this moment increase.When reducing frequency of modulated wave, the effect of generation is then opposite.
When frequency converter starts, the SPWM wave impulse width of driver module 40 output reduces gradually so that voltage and the frequency that the voltage of inversion module 30 outputs and frequency are in direct ratio when being increased to gradually industry vibrator work, thereby finished the soft start of industry vibrator, reduced the enormous impact of immediate current to motor.The constant output that behind the industry vibrator soft start, keeps again SPWM ripple pulsewidth, thus so that output voltage also will keep constant, finish the frequently output vibrating effect of weighing apparatus pressure of weighing apparatus.
Please continue with reference to Fig. 1, rectification module 10 of the present invention is preferably the diode branch that comprises three parallel connections, and every diode branch comprises the diode element D of two series connection.The direct current of rectification module 10 outputs is by anodal dc bus 11 and 12 outputs of negative pole dc bus.
In a preferred embodiment, the present invention also includes sampling resistor 50 and control module 60.Sampling resistor 50 is serially connected with on the negative pole dc bus 12, is used for the current sample to dc bus, and exports control module 60 to after current signal is converted to voltage signal.Control module 60 is this sampled voltage signal and predeterminated voltage signal relatively, stops to export the SPWM ripple to reach the effect of overcurrent protection if the sampled voltage signal is then controlled drive circuit greater than the predeterminated voltage signal.
Control module 60 can not only play the effect of overcurrent protection, can also control the SPWM pulse output of driver module and Real Time Monitoring, processing and adjusting are carried out in the signals such as every protective circuit, testing circuit, computing circuit and other auxiliary circuits source.Control module 60 is preferably dsp chip and peripheral circuit thereof.
Please continue with reference to Fig. 1, inversion module 30 of the present invention is preferably the inversion branch road that comprises three parallel connections, and every inversion branch road comprises two inversion element Q of series connection, and each inversion element Q comprises IGBT element and antiparallel diode element.Wherein, the IGBT element is mainly used to dc inverter is become all adjustable alternating currents of size and frequency, and diode element antiparallel with it then plays the effect of afterflow.
The SPWM ripple of driver module output controls to regulate alternating current voltage and the frequency of the whole output of inversion module by IGBT element gate pole being carried out the real-time adjusting that turns on and off speed.
Further, for reducing the shared volume of each parts of frequency converter, optimizing structure design, the present invention is arranged at power module on the power panel, and control module is arranged on the control board.Power panel and other modules are arranged on the base plate, directly are electrically connected by base plate, have saved the setting of traditional blower fan and control terminal, have saved the space.In addition, control board directly stands on power panel the place ahead, and taking up room reduces.
After adopting the said structure design, so that the small volume of frequency converter of the present invention can be good at being mounted to the function that variable frequency power supply is realized in inside, the therefore removable or carrying vibrating head of one people when operation.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. an industry vibrator special converter is characterized in that, comprises rectification module, loop absorption module, inversion module and driver module; Described rectification module changes the alternating current of input into direct current; Described loop absorption module is the polypropylene capactive of two parallel connections, and described polypropylene capactive capacity is 0.01 to 0.3uF; The SPWM ripple that described driver module output pulse width is adjustable is with voltage and the frequency of the alternating current of control inversion module output; When frequency converter started, the SPWM ripple of described driver module output was so that the alternating current voltage of inversion module output and frequency directly proportionally are increased to the industry vibrator operating voltage and operating frequency then keeps this output voltage and frequency by 0.
2. frequency converter as claimed in claim 1 is characterized in that, described rectification module comprises three diode branch in parallel, and every diode branch comprises two diode elements of series connection.
3. frequency converter as claimed in claim 1 is characterized in that, described frequency converter also comprises the sampling resistor on the negative pole dc bus that is arranged at rectification module output, and control module; Described sampling resistor exports the sampled voltage signal to control module, and control module is this sampled voltage signal and predeterminated voltage signal relatively, stops to export the SPWM ripple if the sampled voltage signal is then controlled drive circuit greater than the predeterminated voltage signal.
4. frequency converter as claimed in claim 3 is characterized in that, described inversion module comprises the inversion branch road of three parallel connections, and every inversion branch road comprises two inversion elements of series connection, and each inversion element comprises IGBT element and antiparallel diode element; Alternating current voltage and frequency that described SPWM ripple is exported to change inversion module by the switching rate that changes the IGBT element.
5. frequency converter as claimed in claim 1 is characterized in that, described frequency converter also comprises power module, and described power module is arranged on the power panel, and described control module is arranged on the master control borad; Described power panel and other modules are arranged on the base plate, and described master control borad is erected in power panel the place ahead; Described power panel directly is electrically connected by base plate with other modules.
6. frequency converter as claimed in claim 1 is characterized in that, described two polypropylene capactive capacity are identical, are 0.22uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105465472A CN103051204A (en) | 2012-12-14 | 2012-12-14 | Special frequency converter for industrial vibrating rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105465472A CN103051204A (en) | 2012-12-14 | 2012-12-14 | Special frequency converter for industrial vibrating rod |
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| Publication Number | Publication Date |
|---|---|
| CN103051204A true CN103051204A (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105465472A Pending CN103051204A (en) | 2012-12-14 | 2012-12-14 | Special frequency converter for industrial vibrating rod |
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| CN (1) | CN103051204A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787967A (en) * | 2016-12-15 | 2017-05-31 | 陕西科技大学 | A kind of General Converters with adverse current resistance and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1936794A2 (en) * | 2006-12-21 | 2008-06-25 | Vacon Oyj | Current measuring arrangement of a frequency converter |
| JP2008271696A (en) * | 2007-04-19 | 2008-11-06 | Toshiba Elevator Co Ltd | Power conversion apparatus |
| CN201435684Y (en) * | 2009-03-31 | 2010-03-31 | 深圳市安邦信电子有限公司 | Low-voltage frequency converter |
| US20100253256A1 (en) * | 2009-04-02 | 2010-10-07 | Vacon Oyj | Frequency converter start-up |
| CN201774245U (en) * | 2010-07-30 | 2011-03-23 | 宁波奥克斯空调有限公司 | PFC overcurrent protecting circuit |
| CN202978728U (en) * | 2012-12-14 | 2013-06-05 | 台州富凌电气有限公司 | Frequency converter special for industrial vibrating spear |
-
2012
- 2012-12-14 CN CN2012105465472A patent/CN103051204A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1936794A2 (en) * | 2006-12-21 | 2008-06-25 | Vacon Oyj | Current measuring arrangement of a frequency converter |
| JP2008271696A (en) * | 2007-04-19 | 2008-11-06 | Toshiba Elevator Co Ltd | Power conversion apparatus |
| CN201435684Y (en) * | 2009-03-31 | 2010-03-31 | 深圳市安邦信电子有限公司 | Low-voltage frequency converter |
| US20100253256A1 (en) * | 2009-04-02 | 2010-10-07 | Vacon Oyj | Frequency converter start-up |
| CN201774245U (en) * | 2010-07-30 | 2011-03-23 | 宁波奥克斯空调有限公司 | PFC overcurrent protecting circuit |
| CN202978728U (en) * | 2012-12-14 | 2013-06-05 | 台州富凌电气有限公司 | Frequency converter special for industrial vibrating spear |
Non-Patent Citations (1)
| Title |
|---|
| 李明峰等: ""工业用振动棒变频电源的研制"", 《华东地区第二届电源技术研讨会论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787967A (en) * | 2016-12-15 | 2017-05-31 | 陕西科技大学 | A kind of General Converters with adverse current resistance and control method |
| CN106787967B (en) * | 2016-12-15 | 2024-02-23 | 陕西科技大学 | Universal frequency converter with counter-current resistor and control method |
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Applicant after: Zhejiang nouveaux riches insult electric incorporated company Address before: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Applicant before: Taizhou Fuling Electrical Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: TAIZHOU FULING ELECTRIC CO., LTD. TO: ZHEJIANG XINFULING ELECTRIC CO., LTD. |
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Application publication date: 20130417 |