CN102682955B - A kind of controllable impedance - Google Patents
A kind of controllable impedance Download PDFInfo
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- CN102682955B CN102682955B CN201210144165.7A CN201210144165A CN102682955B CN 102682955 B CN102682955 B CN 102682955B CN 201210144165 A CN201210144165 A CN 201210144165A CN 102682955 B CN102682955 B CN 102682955B
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- controllable impedance
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- 230000033228 biological regulation Effects 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims description 20
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 10
- 229910052753 mercury Inorganic materials 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005669 field effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 25
- 230000006698 induction Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The present invention provides a kind of controllable impedance, and including inductance L and electrical switch S, wherein, described electrical switch S is connected in parallel on inductance L two ends by the first terminal and the second terminal, and the output of described control circuit connects the control end of electrical switch S.The controllable impedance that the present invention provides, the dutycycle of the electrical switch S in parallel with inductance L is regulated by control circuit, the equivalent inductance amount of Serial regulation inductance L, thus control to load the power of RL, eliminate control winding coil, for the inductance of identical inductances amount, by increasing coil turn, inductance volume can be reduced.Meanwhile, only need to consider under the operating current of maximum induction amount, the safe current density of inductance coil winding, the line footpath of winding selects to be more prone to.
Description
Technical field
The present invention relates to a kind of controllable impedance, it particularly relates to one is come linear by regulation electronic switch dutycycle
Adjust the controllable impedance of the equivalent inductance amount of inductance.
Background technology
Existing inductance stepless dimming technology, is typically connected on the controllable impedance realization of street lamp loop by linear regulation,
And regulate the mode of inductor current amount, following three kinds can be summarized as: one is pulsactor method, coiling control on same magnetic core
Winding Lc processed and Working winding Lw, controls to flow through DC current in winding Lc, and Working winding flows through alternating current, change control around
The size of DC current in group Lc, it is possible to the degree of saturation of change magnetic core, thus change the equivalent inductance of Working winding Lw
Size, reaches to adjust the operating current of street lamp, and then adjusts the purpose of lamp power.Another kind is that orthogonal core inductance controls
Method, docks with second half after the half half-twist of c-type magnetic core, and coiling Working winding on half magnetic core flows through friendship on Working winding
Stream electric current, second half coiling controls winding, controls to flow through on winding direct current, changes the size of DC current, it is possible to change continuously
Become the inductance size of Working winding.Also have one be tandem tap inductance control methods, in inductor circuit, connect one two-way
Switched Thyristors SCR, by changing the conduction angle of IGCT SCR, changes the equivalent inductance amount of controllable inductor LB, Jin Ergai
The size of the pressure drop on time variant voltage actuator LA coil and phase place, it is achieved voltage stabilizing and regulatory function.
But saturation inductance method and core inductance control methods are required for controlling winding in same magnetic core coiling, owing to existing
The efficiency of electromagnetic conversion, when control magnetic core is saturated, the load loss of controllable impedance is higher, and control winding to take certain window
Mouth magnetic core area so that the volume of controllable impedance, quality are big.And tandem tap inductance control methods, by distribution sine energy
Storing and release, regulate output voltage, this kind of method is it is generally required to use two inducers to complete, and structure is complicated, application office
Limit.
Summary of the invention
The technical problem to be solved in the present invention is, it is provided that a kind of controllable impedance, eliminates control winding coil, reduces
Inductance volume, the line footpath of winding selects to be more prone to.
The present invention solves that the technical scheme that its technical problem is used is: provide a kind of controllable impedance, including at least
One inductance L and at least one electrical switch S, wherein, described electrical switch S is connected in parallel on electricity by the first terminal and the second terminal
Sense L two ends, the output of described control circuit connects the control end of electrical switch S.
Above-mentioned controllable impedance, wherein, described control circuit includes control unit, synchronized sampling unit, load sampling list
Unit and PWM driver element, the output of described synchronized sampling unit and load sampling unit connects control unit, described control unit
Output is to PWM driver element, and described PWM driver element is output as the output of this control circuit.
Above-mentioned controllable impedance, wherein, described control unit is microcontroller or controls loop.
Above-mentioned controllable impedance, wherein, described inductance L and power supply Vin, load RL are sequentially connected in series, described synchronized sampling list
Electric current on unit detection inductance L, the voltage at described load sampling unit detection load RL two ends.
Above-mentioned controllable impedance, wherein, described load RL is high-pressure mercury lamp or motor.
Above-mentioned controllable impedance, wherein, goes back series ballast in the series loop of described inductance L, power supply Vin and high-pressure mercury lamp
Device L1.
Above-mentioned controllable impedance, wherein, described electrical switch S is IGCT or insulated gate bipolar transistor.
Above-mentioned controllable impedance, wherein, described electrical switch S is field-effect transistor or audion.
Compared with prior art, the method have the advantages that the controllable impedance that the present invention provides, by controlling electricity
The dutycycle of the electrical switch S that road regulation is in parallel with inductance L, the equivalent inductance amount of Serial regulation inductance L, thus control to load RL
Power, eliminate control winding coil, for the inductance of identical inductances amount, by increasing coil turn, inductance body can be reduced
Long-pending.Meanwhile, only need to consider under the operating current of maximum induction amount, the safe current density of inductance coil winding, the line of winding
Footpath selects to be more prone to.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the electrical block diagram of existing pulsactor method；
Fig. 2 is the electrical block diagram of existing tandem tap inductance control methods；
Fig. 3 is the electrical block diagram of controllable impedance of the present invention；
Fig. 4 is the controllable impedance of the present invention electrical block diagram for high-pressure mercury lamp；
Fig. 5 is the controllable impedance of the present invention electrical block diagram for three phase electric machine.
In figure:
100 control circuit 101 control units 102 load sampling unit
103 synchronized sampling unit 104PWM driver element 200 high-pressure mercury lamps
300 three phase electric machines
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, broadly fall into the scope of protection of the invention.
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, right
The present invention further describes.
Fig. 3 is the electrical block diagram of controllable impedance of the present invention, as it is shown on figure 3, the controllable impedance that the present invention provides, bag
Including at least one inductance L and at least one electrical switch S, wherein, described electrical switch S is by the first terminal and the second terminal also
Being associated in inductance L two ends, the output of described control circuit 100 connects the control end of electrical switch S.Wherein, described control circuit bag
Include control unit 101, synchronized sampling unit 103, load sampling unit 102 and PWM driver element 104, described synchronized sampling list
The output of unit 103 and load sampling unit 102 connects control unit 101, and the output of described control unit 101 is to PWM driver element
104, described PWM driver element 104 is output as the output of this control circuit 100, and connects the control end of electrical switch S.Excellent
Selection of land, described control unit 101 is microcontroller or controls loop.
As indicated at 3, described inductance L and power supply Vin, load RL are sequentially connected in series, and described synchronized sampling unit 103 detects inductance
Electric current on L, the voltage at described load sampling unit 102 detection load RL two ends, the electric current detected and voltage are input to control
Unit 101 processed, by the control unit 101 of control circuit 100 according to the electric current detected and voltage, regulates in parallel with inductance L
Electrical switch S turn-on and turn-off time i.e. dutycycle in a switch periods, the equivalent inductance amount of Serial regulation inductance L,
Thus control to load the power of RL, eliminate control winding coil, for the inductance of identical inductances amount, by increasing coil turn
Number, can reduce inductance volume.Meanwhile, only need to consider under the operating current of maximum induction amount, the safety electricity of inductance coil winding
Current density, the line footpath of winding selects to be more prone to.As it is shown on figure 3, in the series loop of described inductance L, power supply Vin and load RL
Also inline fuse F.
As shown in Figure 4, described load RL is high-pressure mercury lamp 200, town of also connecting between described high-pressure mercury lamp 200 and inductance L
Stream device L1, when requiring the i.e. equivalent electric sensibility reciprocal minimum of maximum operating currenbt, the pressure drop at inductance L two ends is less than 1 volt, street lamp load energy
Obtaining in higher brightness, in output voltage one timing, street lamp output is bigger, and supply input power is minimum.Identical negative
Under load, when loaded work piece is at maximum operating currenbt, the controllable impedance volume of employing paralleling switch method is little, little, the highest temperature is lost
Rise low；When loaded work piece is at minimum working current, the minimum power input using the controllable impedance of paralleling switch method is less.Table
One be 400W high-pressure mercury lamp under maximum operating currenbt, use the experiment number of the controllable impedance of paralleling switch method and pulsactor method
According to.
Table one
As it is shown in figure 5, described load RL is three phase electric machine 300, divide between described three phase electric machine 300 and three-phase alternating-current supply
Other series inductance L, the end that controls of this inductance L two ends electrical switch S, each electrical switch S all in parallel is all connected with control circuit 100
Output, control circuit 100 gathers the voltage and current of three phase supply, the power supply of Synchronization Control three phase mains, it is achieved three-phase simultaneously
Balanced feeding, by the dutycycle of regulation electronic switch S, can realize soft start and the stepless speed regulation of three phase electric machine.Due to inductance
The existence of coil, electrical switch S, when being turned on or off, will not produce surge current, and during load operating condition conversion, inductance
The surge voltage produced will be absorbed by circuit, and compared with frequency control, circuit is simple, reliability is high, harmonic wave is little and with low cost.
Preferably, described electrical switch S is IGCT or insulated gate bipolar transistor (IGBT), when electrical switch S is
During IGCT, the first terminal of described electrical switch S, the second terminal and control end corresponding anode, negative electrode and control pole respectively；
When electrical switch S is insulated gate bipolar transistor, the first terminal of described electrical switch S, the second terminal and control end divide
Not corresponding colelctor electrode, emitter stage and gate pole.
Preferably, described electrical switch S is field-effect transistor or audion, when electrical switch S is field-effect transistor
Time, the drain electrode the most corresponding with controlling end of the first terminal of described electrical switch S, the second terminal, source electrode and grid, work as electrical switch
When S is audion, the first terminal of described electrical switch S, the second terminal and control end corresponding colelctor electrode, emitter stage and base respectively
Pole.
In sum, the controllable impedance that the present invention provides, by the electronic cutting that control circuit 100 regulation is in parallel with inductance L
Close the dutycycle of S, the equivalent inductance amount of Serial regulation inductance L, thus control to load the power of RL, eliminate control winding wire
Circle, for the inductance of identical inductances amount, by increasing coil turn, can reduce inductance volume.Meanwhile, only need to consider at maximum electricity
Under the operating current of sensibility reciprocal, the safe current density of inductance coil winding, the line footpath of winding selects to be more prone to.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (4)
1. a controllable impedance, including inductance L and electrical switch S, it is characterised in that: described electrical switch S passes through the first terminal
Being connected in parallel on inductance L two ends with the second terminal, the end that controls of described electrical switch S connects the output of control circuit, described control electricity
The dutycycle of the electrical switch S that road regulation is in parallel with inductance L, the equivalent inductance amount of Serial regulation inductance L；Described control circuit bag
Include control unit, synchronized sampling unit, load sampling unit and PWM driver element, described synchronized sampling unit and load sampling
The output of unit connects control unit, and described control unit exports PWM driver element, and described PWM driver element is output as
The output of this control circuit；Described inductance L and power supply Vin, load RL are sequentially connected in series, described synchronized sampling unit detection inductance L
On electric current, described load sampling unit detection load RL two ends voltage；Described load RL is high-pressure mercury lamp or motor, works as institute
State load RL when being high-pressure mercury lamp, between described high-pressure mercury lamp and inductance L, go back series ballast device L1；When described load RL is three-phase
During motor, difference series inductance L between described three phase electric machine and three-phase alternating-current supply.
Controllable impedance the most according to claim 1, it is characterised in that: described control unit is microcontroller or controls ring
Road.
Controllable impedance the most according to claim 1, it is characterised in that: described electrical switch S is IGCT or insulated gate pair
Bipolar transistor.
Controllable impedance the most according to claim 1, it is characterised in that: described electrical switch S is field-effect transistor or three
Pole is managed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210144165.7A CN102682955B (en) | 2012-05-10 | 2012-05-10 | A kind of controllable impedance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210144165.7A CN102682955B (en) | 2012-05-10 | 2012-05-10 | A kind of controllable impedance |
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| CN102682955A CN102682955A (en) | 2012-09-19 |
| CN102682955B true CN102682955B (en) | 2016-09-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887963B (en) * | 2014-02-26 | 2018-08-21 | 常州信息职业技术学院 | Critical conduction full load high power factor correcting circuit |
| CN108447665A (en) * | 2018-01-24 | 2018-08-24 | 北京金科华业测控技术有限公司 | A kind of controllable impedance device assembly and speaker |
| CN112713630B (en) * | 2020-12-25 | 2022-09-06 | 国创移动能源创新中心(江苏)有限公司 | Bidirectional soft start circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137263A (en) * | 2006-08-28 | 2008-03-05 | 深圳市金威源科技有限公司 | Digital type electronic ballast and control method thereof |
| CN101414790A (en) * | 2007-10-18 | 2009-04-22 | 雅马哈株式会社 | DC/AC converter |
| CN202601366U (en) * | 2012-05-10 | 2012-12-12 | 杭州金果科技有限公司 | Adjustable inductor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007163603A (en) * | 2005-12-09 | 2007-06-28 | Harison Toshiba Lighting Corp | Fixing device driver |
| KR100780706B1 (en) * | 2006-08-17 | 2007-11-30 | 엘에스산전 주식회사 | Super conductive current limiter |
| CN101578003B (en) * | 2009-05-21 | 2012-10-03 | 浙江大学 | High-power LED driver |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137263A (en) * | 2006-08-28 | 2008-03-05 | 深圳市金威源科技有限公司 | Digital type electronic ballast and control method thereof |
| CN101414790A (en) * | 2007-10-18 | 2009-04-22 | 雅马哈株式会社 | DC/AC converter |
| CN202601366U (en) * | 2012-05-10 | 2012-12-12 | 杭州金果科技有限公司 | Adjustable inductor |
Non-Patent Citations (1)
| Title |
|---|
| 基于LT3598多通道LED集成驱动应用电路的设计;吴兰君等;《中国照明电器》;20091025(第10期);全文 * |
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Denomination of invention: Adjusting method of adjustable inductor and inductance value Effective date of registration: 20190416 Granted publication date: 20160914 Pledgee: Hangzhou joint rural commercial bank Limited by Share Ltd. three pier sub branch Pledgor: HANGZHOU JINGUO TECHNOLOGY Co.,Ltd. Registration number: 2019330000104 |
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