CN100373755C - AC-DC conversion device with variable connection method and operation method thereof - Google Patents
AC-DC conversion device with variable connection method and operation method thereof Download PDFInfo
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- CN100373755C CN100373755C CNB2004100393806A CN200410039380A CN100373755C CN 100373755 C CN100373755 C CN 100373755C CN B2004100393806 A CNB2004100393806 A CN B2004100393806A CN 200410039380 A CN200410039380 A CN 200410039380A CN 100373755 C CN100373755 C CN 100373755C
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Abstract
The invention relates to a variable-connection AC/DC conversion device and an operation method thereof. This alternating current-direct current conversion device of variable connecing is applicable to and converts alternating current power supply into direct current power supply, and it includes: a rectification drive module; a voltage transformation module; an output rectifying module; and the voltage detection module is internally provided with a plurality of piezoelectric transformation devices and a control module. The operation method comprises providing a plurality of piezoelectric transformer devices in an AC/DC converter, detecting input voltage received by an AC power supply, and correspondingly adjusting the connection relationship between the input ends of the piezoelectric transformer devices according to the input voltage received by the AC power supply, so that the ratio of output voltage and input voltage obtained by combining the piezoelectric transformer devices and the input voltage received by the AC power supply are changed in a reverse direction. The invention can obtain the same or similar voltage under different input voltage conditions by utilizing the change of the ratio of the output voltage to the input voltage generated by the serial connection and the parallel connection of a plurality of piezoelectric transformation devices, does not need to use a complex circuit for control, and has the advantages of low cost, easy manufacture and the like, and is beneficial to mass production.
Description
Technical field
The present invention relates to a kind of DC-AC conversion device and method of operation thereof, particularly relate to and a kind ofly have a plurality of piezoelectricity potential devices, and the connection of the input of those piezoelectricity potential devices can be given the DC-AC conversion device and the method for operation thereof of the variable connecting method of change.
Background technology
In order to reduce the use of chemical material, most adopt as electrical equipment that DC power supply such as battery are originated as power for operation all can add DC-AC conversion device, the AC power that these electrical equipment can be used provided by Utilities Electric Co. is as the source of power for operation.Traditional AC-DC converter electricity consumption magnetic type transformer obtains the direct voltage that needs, but this electromagnetic type transformer is because the requirement of safety, and former secondary winding will leave certain distance, and such requirement makes the electromagnetic type transformer be difficult to accomplish miniaturization.And that piezoelectric transformer has size is little, advantages such as good insulation preformance, and therefore, the application of piezoelectric transformer more and more comes into one's own.Yet, because the voltage that various countries adopted or difference is arranged, the DC-AC conversion device and impassable being applicable to all over the world of only using a piezoelectric transformer merely.
In order to address this problem, part manufacturer provides a kind of DC-AC conversion device of Improvement type.The DC-AC conversion device utilization of this kind Improvement type is clamper half-bridge circuit (active-clamphalf-bridge circuit), pulse wave frequency modulating (pulse frequency modulation initiatively, PFM) (pulse width modulation, PWM) the back coupling controller is controlled the reaction of DC-AC conversion device to different voltage input sources with pulse wave width modulation.Therefore and do not meet the demand of a large amount of uses yet this kind control circuit involves extensively, and design is extremely complicated and can't be by easily and cheap creating.
This shows that still there is deficiency in above-mentioned existing DC-AC conversion device, and demands urgently further being improved.In order to solve the deficiency of existing DC-AC conversion device, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but does not see always that for a long time suitable design finished by development, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing DC-AC conversion device exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of DC-AC conversion device and method of operation thereof of new variable connecting method, can improve general existing DC-AC conversion device, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the deficiency that existing DC-AC conversion device exists, and provide a kind of DC-AC conversion device and method of operation thereof of new variable connecting method, technical problem to be solved is to make it can utilize simple circuit design to reach to meet different input voltages but requirement that same output voltage is arranged, thereby be suitable for practicality more, and have the value on the industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.The DC-AC conversion device of a kind of variable connecting method that proposes according to the present invention, be applicable to AC power is converted to DC power supply, the DC-AC conversion device of this variable connecting method comprises: the rectification driver module, rectification is by the input voltage of this AC power gained, and commutating voltage is converted to corresponding driving voltage; The transformation module, have in this transformation module: a plurality of piezoelectricity potential devices and a control module, in those piezoelectricity potential devices each has two inputs and two outputs respectively, and those output parallel connections of those piezoelectricity potential devices become two transformation outputs of this transformation module, and the input of this control module is in order to receiving the driving voltage of this AC power gained, and according to the connected mode between the input of those piezoelectricity potential devices of the corresponding adjustment of the input voltage of this AC power gained; And the DC-AC conversion device of this variable connecting method also comprises the output rectification module, receives the voltage of being exported by those transformation outputs, and the voltage commutation that receives is output as this DC power supply; And the DC-AC conversion device of this variable connecting method also comprises the detecting voltage module, detect the input voltage of this AC power gained, and and according to the input voltage of this AC power gained send controlling signal to this control module with the connected mode between those piezoelectricity potential devices of corresponding adjustment, this driving voltage is transferred to those piezoelectricity potential devices.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The DC-AC conversion device of aforesaid variable connecting method, wherein said transformation module comprises: the piezoelectricity potential device has first positive input terminal, first negative input end, first positive output end and first negative output terminal; And the second piezoelectricity potential device, have second positive input terminal, second negative input end, second positive output end and second negative output terminal, wherein, this first positive output end and this second positive output end be electric property coupling mutually, and this first negative output terminal and this second negative output terminal electric property coupling mutually.
The DC-AC conversion device of aforesaid variable connecting method, wherein said control module comprises: first switch is electrically coupled between this first positive input terminal and this second positive input terminal; Second switch is electrically coupled between this first negative input end and this second negative input end; And the 3rd switch, be electrically coupled between this first negative input end and this second positive input terminal, wherein, when this input voltage meets one first predetermined level, this first and second switch ends and the 3rd switch conduction, and when this input voltage met one second predetermined level, this first and second switch conduction and the 3rd switch ended, and this first predetermined level is higher than this second predetermined level.
The DC-AC conversion device of aforesaid variable connecting method, wherein said rectification driver module comprises: rectifying device, this input voltage of rectification is to get a commutating voltage; And drive unit, comprising: first inductance, a termination is received this commutating voltage, and the other end is electrically coupled to the input of this control module; Second inductance; And driving switch, wherein, this second inductance, one end electrically receives this commutating voltage, and the other end is electrically coupled to an end of this driving switch, the other end of this driving switch is electrically coupled to the described input of this control module, and this driving switch determines whether conducting according to this input voltage.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.The method of operation of the DC-AC conversion device of a kind of variable connecting method that proposes according to the present invention, be applicable to an AC power is converted to a direct current power supply, the method of operation of this DC-AC conversion device comprises the steps: the first step. DC-AC conversion device is provided, wherein this DC-AC conversion device comprises the transformation module, this transformation module comprises a plurality of piezoelectricity potential devices, and in those piezoelectricity potential devices each has two inputs and two outputs respectively, and those output parallel connections of those piezoelectricity potential devices become two transformation outputs of this transformation module; Second step. detect the input voltage of this AC power; And the 3rd step. according to this input voltage, the annexation of the input of those piezoelectricity potential devices of corresponding adjustment so that the combination of those piezoelectricity potential devices and output voltage and the input voltage of input voltage ratio and this AC power be inverse change.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The method of operation of the DC-AC conversion device of aforesaid variable connecting method, wherein said those piezoelectricity potential devices are to be made of piezoelectric transformer.
The method of operation of the DC-AC conversion device of aforesaid variable connecting method, wherein said the 3rd step more comprises: when this input voltage is higher than a default value, the input electric property coupling that increases those piezoelectricity potential devices becomes the quantity of polyphone, uses output voltage and input voltage ratio that reduction is got by those piezoelectricity potential device combinations; And when this input voltage was lower than this default value, the input electric property coupling that increases those piezoelectricity potential devices became quantity in parallel, used output voltage and input voltage ratio that raising is got by those piezoelectricity potential device combinations.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of DC-AC conversion device of variable connecting method, and it is applicable to AC power is converted to DC power supply.The DC-AC conversion device of this variable connecting method has the rectification driver module, transformation module and output rectification module.Wherein, the rectification of rectification driver module is by the input voltage that AC power received, and this input voltage is converted to corresponding driving voltage.A plurality of piezoelectricity potential devices and a control module in the transformation module, have then been comprised, in these piezoelectricity potential devices each has two inputs and two outputs respectively, and the output parallel connection of these piezoelectricity potential devices becomes two transformation outputs of transformation module, control module then receives driving voltage by input, and according to the connected mode between the input of these piezoelectricity potential devices of the corresponding adjustment of aforesaid input voltage.The output rectification module receives the voltage of being exported by the transformation output, and the voltage commutation that receives is output as DC power supply.
In a preferred embodiment of the present invention, aforesaid transformation module comprises first and second piezoelectricity potential device.Wherein, the first piezoelectricity potential device has first positive input terminal, first negative input end, first positive output end and first negative output terminal, and the second piezoelectricity potential device then has second positive input terminal, second negative input end, second positive output end and second negative output terminal.As previously mentioned, first positive output end and second positive output end be electric property coupling mutually, and first negative output terminal and second negative output terminal electric property coupling mutually, so that the output of first and second piezoelectricity potential device is in parallel.
Moreover, in this preferred embodiment, control module can have first and second driving voltage input, and first, second and the 3rd switch, and first switch is electrically coupled between first positive input terminal and second positive input terminal, second switch is electrically coupled between first negative input end and second negative input end, and the 3rd switch then is electrically coupled between first negative input end and second positive input terminal.Wherein, when input voltage met first predetermined level, first and second switch ended and the 3rd switch conduction, and when input voltage meets second predetermined level, first and second switch conduction and the 3rd switch end, and first predetermined level is higher than second predetermined level.
In another preferred embodiment of the present invention, aforesaid rectification driver module has rectifying device and drive unit.Rectifying device rectification input voltage is to get commutating voltage; Drive unit then comprises first and second inductance and a driving switch, wherein, first inductance, one termination is received commutating voltage, the other end is electrically coupled to the input of control module, and second inductance, one end electrically receives commutating voltage, the other end is electrically coupled to an end of driving switch, and the other end of driving switch is electrically coupled to the input of control module, and determines whether conducting according to input voltage.
The present invention also proposes a kind of method of operation of DC-AC conversion device of variable connecting method, and it is applicable to AC power is converted to DC power supply.This method of operation at first provides a plurality of piezoelectricity potential devices in DC-AC conversion device, and detecting is by input voltage that AC power received, and according to input voltage that this AC power received and the annexation between the input of corresponding adjustment piezoelectricity potential device so that these piezoelectricity potential devices combinations and output voltage and the input voltage that received of input voltage ratio and this AC power be inverse change.
In a preferred embodiment of the present invention, when input voltage is higher than a certain default value, promptly increase between the input of piezoelectricity potential device quantity for polyphone; And when input voltage is lower than this default value, promptly increases and be quantity in parallel between the input of piezoelectricity potential device.
Via as can be known above-mentioned, the invention relates to a kind of DC-AC conversion device and method of operation thereof of variable connecting method, it is that a plurality of piezoelectricity potential devices are provided in DC-AC conversion device, and detecting is by input voltage that AC power received, and according to input voltage that this AC power received and the annexation between the input of corresponding adjustment piezoelectricity potential device so that these piezoelectricity potential devices combinations and output voltage and the input voltage that received of input voltage ratio and this AC power be inverse change.
By technique scheme, the present invention has following advantage at least: the present invention is because only utilize the variation of the output voltage that series and parallel produced and the ratio of going into the transmission of electricity pressure between a plurality of piezoelectricity potential devices, under the situation of different input voltages, to obtain identical or approximate voltage, so do not need to use circuit to do control as complexity such as active clamper half-bridge circuit or PFM and PWM back coupling controllers.Therefore, can provide by the DC-AC conversion device of variable connecting method provided by the present invention that cost is low to be beneficial to mass-produced advantage with making easily to wait.
In sum, the present invention utilizes simple circuit design to reach to meet different input voltages but requirement that same output voltage is arranged, thereby be suitable for practicality more, and in like product and method of operation, do not see have similar structural design and method of operation to publish or use and really genus innovation, no matter it all has bigger improvement on product structure, method of operation or function, have technically than much progress, and produced handy and practical effect, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Fig. 1 is the circuit block diagram according to the DC-AC conversion device of the variable connecting method of a preferred embodiment of the present invention.
Fig. 2 is the circuit block diagram according to the employed transformation module of a preferred embodiment of the present invention.
Fig. 3 is single-stage but is of a size of the output voltage and the input voltage ratio of the potential device of two piezoelectric transformer additions, output voltage when two piezoelectric transformers are contacted mutually and input voltage ratio, and two piezoelectric transformers when being in parallel output voltage and the frequency of input voltage that received of input voltage ratio and AC power between concern schematic diagram.
Fig. 4 is the circuit block diagram of the DC-AC conversion device of the variable connecting method of another preferred embodiment according to the present invention.
Fig. 5 A～Fig. 5 C is the circuit diagram of the output rectification module that adopts according to embodiments of the invention.
Fig. 6 is the flow chart according to the DC-AC conversion device of the variable connecting method of a preferred embodiment of the present invention.
10,40: DC-AC conversion device 20,46,120: the transformation module
22,122: control module 41: rectification module
42,100: rectification driver module 43: driver module
44: detecting voltage module 48,140: the output rectification module
113,115,126a～d: contact 126,128,130: the piezoelectricity potential device
128a～d, 130a～d: contact 133,135: contact
213,215,217,219: contact 220,222,224: switch
240a～d, 242a～d: contact 240,242: piezoelectricity potential device
420: diode bridge rectifier 422,510,528,546: electric capacity
424: semi-bridge switching circuit 426,428: inductance
430: driving switch 508,520,522,544: inductance
500,502,504,506: diode 512,530,548: load
524,526,540,542: diode S600: a plurality of piezoelectricity potential devices are provided
S602: the detecting input voltage that AC power received
S604: the annexation of adjusting the piezoelectricity potential device according to the input voltage that AC power received
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, DC-AC conversion device and its concrete structure of method of operation, method of operation, step, feature and the effect thereof of the variable connecting method that foundation the present invention is proposed, describe in detail as after.
Seeing also shown in Figure 1ly, is the circuit block diagram according to the DC-AC conversion device of the variable connecting method of a preferred embodiment of the present invention.The DC-AC conversion device 10 of the variable connecting method shown in the present embodiment, it roughly can divide into rectification driver module 100, transformation module 120 and output rectification module 140.Wherein, rectification driver module 100 will be by the input voltage rectification in addition of AC power VI gained, and this input voltage is converted to corresponding driving voltage, from contact 113 and 115 driving voltage is exported to follow-up transformation module 120 again.Transformation module 120 is after receiving the driving voltage of being exported by rectification driver module 100, can after transformation, export this driving voltage to output rectification module 140, afterwards necessary DC power supply VO when becoming the electrical equipment use after output rectification module 140 rectifications again by contact 133 and 135.
As shown in Figure 1, transformation module 120 comprises a control module 122, and a plurality of piezoelectricity potential device, as piezoelectricity potential device 126,128 and 130 or the like.Wherein, piezoelectricity potential device 126,128 and 130 has two input 126a and 126b respectively, 128a and 128b and 130a and 130b, and have two output 126c and 126d, 128c and 128d and 130c and 130d respectively.In addition, these piezoelectricity potential devices 126,128 and 130 output are two outputs 133 and 135 to become transformation module 120 of being connected in parallel.It is noted that parallel connection herein refers to the circuit relationships that the contact with homophase is connected, and there is no absolute related with physical location.Moreover, control module 122 is to receive the driving voltage of being exported by rectification driver module 100 by contact (being input at this) 113 and 115, and according to the connected mode between each input of the next corresponding adjustment piezoelectricity potential device 126,128 of the input voltage of importing by AC power and 130.
For make be familiar with this operator can clearer understanding technology contents of the present invention, below will describe circuit connecting mode in the transformation module 120 in detail for an embodiment.Seeing also shown in Figure 2ly, is the circuit block diagram of employed according to a preferred embodiment of the present invention transformation module.For the purpose of simplifying the description so that description is unlikely too numerous and diverse, at this is that example describes with the situation that comprises two piezoelectricity potential devices 240 and 242 only, yet is familiar with this skill person when can it being extended to the situation that comprises plural piezoelectricity potential device according to this kind circuit design spirit.In addition, because the AC power that is widely adopted at present generally can be divided into about 220 volts and about 110 volts two kinds, therefore be to be that reference potential is done further explanation in the present embodiment with these two kinds of current potentials.
In Fig. 2, transformation module 20 comprises a control module 22 and piezoelectricity potential device 240 and 242.In control module 22, switch 220 is between the input 242a (or claiming second positive input terminal) of the input 240a (or claiming first positive input terminal) that is electrically coupled to piezoelectricity potential device 240 and piezoelectricity potential device 242; Switch 222 is electrically coupled between the input 242b (or claiming second negative input end) of the input 240b (or claiming first negative input end) of piezoelectricity potential device 240 and piezoelectricity potential device 242; 224 on switch is electrically coupled between the input 242a of the input 240b of piezoelectricity potential device 240 and piezoelectricity potential device 242.
If have the DC-AC conversion device of transformation module 20 be to use in voltage be 220 volts with 110 volts zone in, then control module 22 just must change the state of switch 220,222 and 224 according to residing zone.For instance, when input voltage that AC power provided was 220 volts, control module 22 just must make switch 220 and 222 by (turn off), and makes switch 224 conductings (turn on) simultaneously.By this, the input 240a of piezoelectricity potential device 240 with electrical coupling connected to contact 213 (that is, contact 113 places as shown in Figure 1), the input 240b of piezoelectricity potential device 240 and the input 242a of piezoelectricity potential device 242 be electric property coupling mutually, the input of piezoelectricity potential device 242 then is electrically coupled to contact 215 (that is, contact 115 places as shown in Figure 1).By the framework of this kind polyphone,, be two piezoelectricity potential device additions but the output voltage and the input voltage ratio of the piezoelectricity potential device that presents with single-stage are come for a short time with comparable dimensions by the output voltage and the input voltage ratio of piezoelectricity potential device 240 and 242 gained.
In the present invention, above-mentioned connected mode is called as polyphone.In other words, polyphone herein is defined to be under the prerequisite of each output for parallel connection of these piezoelectricity potential devices, extraneously drive the signal to receive except two piezoelectricity potential devices wherein respectively have an input (and being oppositely input between these two inputs) to be connected to, the reverse each other input of other input signal that should receive will link to each other in twos.For instance, see also shown in Figure 1, if input polyphone with piezoelectricity potential device 126,128 and 130, then its connected mode can be input 126a and is electrically coupled to contact 113, input 126b is electrically coupled to input 128a, input 128b is electrically coupled to input 130a, and input 130b is electrically coupled to contact 115.
Please consult shown in Figure 2ly again, when input voltage that AC power provided is 110 volts time marquis, control module 22 just must make switch 220 and 222 conductings, and switch 224 is ended.By this, the input 240a of piezoelectricity potential device 240 and the input 242a of piezoelectricity potential device 242 will be electrically coupled to contact 213 simultaneously, and the input 242b of the input 240b of piezoelectricity potential device 240 and piezoelectricity potential device 242 will be electrically coupled to contact 215 simultaneously.This kind connected mode is called as parallel connection.Framework by this kind parallel connection, by the output voltage and the input voltage ratio of piezoelectricity potential device 240 and 242 gained, be two piezoelectricity potential device additions but the output voltage and the input voltage ratio of the piezoelectricity potential device that presents with single-stage are come greatlyyer with comparable dimensions.
See also shown in Figure 3, it illustrates to single-stage but is of a size of two piezoelectric transformers (Piezoelectric Transformer, PT) output voltage and the input voltage ratio of the potential device of addition (back claims the single-stage potential device), output voltage when two piezoelectric transformers are contacted mutually and input voltage ratio, and two piezoelectric transformers when being in parallel output voltage and the frequency of input voltage that received of input voltage ratio and AC power between concern schematic diagram.As shown in the figure, the output voltage of single-stage potential device (Single PT) and input voltage ratio are obviously between the output voltage and input voltage ratio when two piezoelectric transformers are contacted (Series PT) mutually and be in parallel (Parallel PT).Therefore, by this kind relation, the present invention can keep the voltage of the DC power supply that will obtain in a fixed range according to the voltage of the AC power of being imported from working as.
Next seeing also shown in Figure 4ly, is the circuit block diagram according to the DC-AC conversion device of the variable connecting method of another preferred embodiment of the present invention.In this embodiment, DC-AC conversion device 40 has comprised rectification driver module 42, detecting voltage module 44, transformation module 46 and output rectification module 48.Owing to gone through transformation module 46 before, therefore given unnecessary details morely this no longer doing.As seen from the figure, among rectification driver module 42, comprised a rectifying device 41 of being formed by diode bridge rectifier 420, electric capacity 422 and semi-bridge switching circuit 424, and by two inductance 426 and 428 and drive units 43 that driving switch 430 is formed.Rectifying device 41 can be with rectification be to obtain commutating voltage by input voltage that AC power received, and this commutating voltage is exported to drive unit 43 more in addition.Among drive unit 43, inductance 426 1 terminations are received commutating voltage, and the other end then is electrically coupled to the input of transformation module 46.Moreover inductance 428 1 ends electrically receive commutating voltage, and the other end is electrically coupled to an end of driving switch 430, and the other end of driving switch 430 then is electrically coupled to the input of transformation module 46.
In the present embodiment, whether driving switch 430 is inductance 428 to be included within the circuit running in order to decision.As previously mentioned, each piezoelectricity potential device in the transformation module 46 polyphone with in parallel in need the inductance of tool different resonant frequencies respectively, therefore for transformation module 46 can perfectly be operated, just must in drive unit 43, provide the function that can produce different resonant frequencies, and driving switch 430 operates this demand that provides with regard to utilizing control whether to include inductance 428 in circuit.Should be noted that, in the present embodiment, detecting voltage module 44 can send the action that corresponding controlling signal decides transformation module 46 and driving switch 430 by circuit 440 and 442 respectively, but this be not to be unique practice according to the input voltage VI of the AC power that it detected.Be familiar with this skill person when selecting the mode that is fit to according to the situation in when design.
Next seeing also shown in Fig. 5 A～Fig. 5 C, is the circuit diagram of the output rectification module that adopts according to embodiments of the invention.In Fig. 5 A, the anode of the diode 500 of output rectification module 50a and the negative electrode of diode 502 are electrically coupled to the input (contact 133 as shown in Figure 1) of output rectification module 50a simultaneously, and the negative electrode of the anode of diode 504 and diode 506 is electrically coupled to another input (contact 135 as shown in Figure 1) of output rectification module 50a simultaneously.In addition, diode 500 and 504 negative electrode are electrically coupled to an end of inductance 508, and the other end of inductance 508 then is electrically coupled to an end of electric capacity 510 and load 512.Moreover, diode 502 and 506 anode be electrically coupled to electric capacity 510 and load 512 not with inductance 508 end of electric property coupling mutually.
In Fig. 5 B, inductance 520 1 ends of output rectification module 50b are electrically coupled to the anode of diode 524 and the input (contact 133 as shown in Figure 1) of output rectification module 50b, and the other end of inductance 520 is electrically coupled to an end of inductance 522, electric capacity 528 and load 530.The other end of inductance 522 then is electrically coupled to the anode of diode 526 and another input (contact 135 as shown in Figure 1) of output rectification module 50b.Diode 524 and 526 negative electrode are electrically coupled in electric capacity 528 and the load 530 not and inductance 520 end of electric property coupling mutually simultaneously.
In Fig. 5 C, the anode of the diode 540 of output rectification module 50c is electrically coupled to the input (contact 133 as shown in Figure 1) of output rectification module 50c, its negative electrode then with an end of the negative electrode of diode 542 and inductance 544 electric property coupling mutually.One end of another grade of inductance 544 and electric capacity 546 and load 548 is electric property coupling mutually.The anode of diode 542 then be electrically coupled to simultaneously electric capacity 546 and load 548 not with inductance 544 end of electric property coupling mutually, and another input (contact 135 as shown in Figure 1) of output rectification module 50c.
In addition, can summarize a kind of method of operation of DC-AC conversion device of variable connecting method by technology proposed by the invention.Seeing also shown in Figure 6ly, is the flow chart of the DC-AC conversion device of variable connecting method according to a preferred embodiment of the present invention.This method of operation at first provides a plurality of piezoelectricity potential devices (as step S600) in DC-AC conversion device.Next promptly obtain importing the input voltage (as step S602) of this DC-AC conversion device by the detecting AC power.Last again according to this input voltage and the annexation between the input of corresponding adjustment piezoelectricity potential device so that these piezoelectricity potential devices combinations and output voltage and the input voltage that received of input voltage ratio and AC power be inverse change (as step S604).
And as noted earlier, in step S604, adjust in the annexation of piezoelectricity potential device, can whether meet different default values with input voltage to decide annexation how to adjust the piezoelectricity potential device; On the other hand, also can may set the default value that obviously to distinguish its scope between the voltage range, by this input of adjustment piezoelectricity potential device that can be suitable relation at each.Therefore, when when using the latter's mode, then when input voltage is higher than default value, just must increase the quantity of contacting between the input of piezoelectricity potential device, to reduce output voltage and input voltage ratio by this; And when input voltage was lower than default value, quantity in parallel between the input of then necessary increase piezoelectricity potential device was to improve output voltage and input voltage ratio by this.
In sum, the present invention utilizes the output voltage that series, parallel produced between a plurality of piezoelectricity potential devices and the variation of input voltage ratio, and can obtain identical or approximate voltage under the situation of different input voltages.This kind control circuit is very simple and easy compared to the circuit of complexity such as active clamper half-bridge circuit or PFM and PWM back coupling controller.Therefore, cheap for manufacturing cost by the DC-AC conversion device of variable connecting method provided by the present invention is beneficial to a large amount of productions, and has industrial utilization widely.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (7)
1. the DC-AC conversion device of a variable connecting method is applicable to AC power is converted to DC power supply, it is characterized in that the DC-AC conversion device of this variable connecting method comprises:
Rectification driver module, rectification be by the input voltage of this AC power gained, and commutating voltage is converted to corresponding driving voltage;
The transformation module, have a plurality of piezoelectricity potential devices and a control module in this transformation module, wherein each in those piezoelectricity potential devices has two inputs and two outputs respectively, and those output parallel connections of those piezoelectricity potential devices become two transformation outputs of this transformation module, and the input of control module is in order to receive above-mentioned driving voltage, and according to the connected mode between the input of those piezoelectricity potential devices of the corresponding adjustment of the input voltage of this AC power gained, this driving voltage is transferred to those piezoelectricity potential devices;
The DC-AC conversion device of this variable connecting method also comprises the output rectification module, receives the voltage of being exported by those transformation outputs of this transformation module, and the voltage commutation that receives is output as this DC power supply; And
The DC-AC conversion device of this variable connecting method also comprises the detecting voltage module, detect the input voltage of this AC power gained, and according to the input voltage of this AC power gained send controlling signal to this control module with the connected mode between those piezoelectricity potential devices of corresponding adjustment.
2. the DC-AC conversion device of variable connecting method according to claim 1 is characterized in that wherein said transformation module comprises:
The first piezoelectricity potential device has first positive input terminal, first negative input end, first positive output end and first negative output terminal; And
The second piezoelectricity potential device has second positive input terminal, second negative input end, second positive output end and second negative output terminal,
Wherein, this first positive output end and this second positive output end be electric property coupling mutually, and this first negative output terminal and this second negative output terminal electric property coupling mutually.
3. the DC-AC conversion device of variable connecting method according to claim 2 is characterized in that wherein said control module comprises:
First switch is electrically coupled between this first positive input terminal and this second positive input terminal;
Second switch is electrically coupled between this first negative input end and this second negative input end; And
The 3rd switch is electrically coupled between this first negative input end and this second positive input terminal,
Wherein, when this input voltage met first predetermined level, this first and second switch ended and the 3rd switch conduction, and when this input voltage meets second predetermined level, this first and second switch conduction and the 3rd switch end, and this first predetermined level is higher than this second predetermined level.
4. the DC-AC conversion device of variable connecting method according to claim 1 is characterized in that wherein said rectification driver module comprises:
Rectifying device, this input voltage of rectification is to get commutating voltage; And drive unit, comprising:
First inductance, a termination is received this commutating voltage, and the other end is electrically coupled to the input of this control module;
Second inductance; And
Driving switch,
Wherein, this second inductance, one end electrically receives this commutating voltage, the other end is electrically coupled to an end of this driving switch, and the other end of this driving switch is electrically coupled to the described input of this control module, and this driving switch determines whether conducting according to this input voltage.
5. the method for operation of the DC-AC conversion device of a variable connecting method is applicable to AC power is converted to DC power supply, it is characterized in that the method for operation of this DC-AC conversion device may further comprise the steps:
The first step. DC-AC conversion device is provided, wherein this DC-AC conversion device comprises the transformation module, this transformation module comprises a plurality of piezoelectricity potential devices, and in those piezoelectricity potential devices each has two inputs and two outputs respectively, and those output parallel connections of those piezoelectricity potential devices become two transformation outputs of this transformation module;
Second step. detect the input voltage of this AC power; And
The 3rd step. according to the input voltage of this AC power, the annexation of the input of those piezoelectricity potential devices of corresponding adjustment, the output voltage that gets so that those piezoelectricity potential devices make up and the input voltage of input voltage ratio and this AC power are inverse change.
6. the method for operation of the DC-AC conversion device of variable connecting method according to claim 5 is characterized in that wherein said those piezoelectricity potential devices are to be made of piezoelectric transformer.
7. the method for operation of the DC-AC conversion device of variable connecting method according to claim 5 is characterized in that wherein said the 3rd step more comprises:
When the input voltage of this AC power was higher than a default value, the input electric property coupling that increases those piezoelectricity potential devices became the quantity of polyphone, so as to reducing output voltage and the input voltage ratio that is got by those piezoelectricity potential device combinations; And
When the input voltage of this AC power was lower than this default value, the input electric property coupling that increases those piezoelectricity potential devices became quantity in parallel, so as to improving output voltage and the input voltage ratio that is got by those piezoelectricity potential device combinations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100393806A CN100373755C (en) | 2004-01-30 | 2004-01-30 | AC-DC conversion device with variable connection method and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100393806A CN100373755C (en) | 2004-01-30 | 2004-01-30 | AC-DC conversion device with variable connection method and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1649232A CN1649232A (en) | 2005-08-03 |
| CN100373755C true CN100373755C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100393806A Expired - Lifetime CN100373755C (en) | 2004-01-30 | 2004-01-30 | AC-DC conversion device with variable connection method and operation method thereof |
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| Country | Link |
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| CN (1) | CN100373755C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777845B (en) * | 2008-12-26 | 2012-05-30 | 康舒科技股份有限公司 | High Efficiency Global Switching Power Supply |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390344A (en) * | 2022-08-30 | 2022-11-25 | 魅杰光电科技(上海)有限公司 | Light source adjustment equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341278A (en) * | 1992-08-20 | 1994-08-23 | Brooks Steven W | Switching pulsed resonant DC-DC converter power amplifier |
| US6307757B1 (en) * | 1999-03-23 | 2001-10-23 | Advanced Energy Industries, Inc. | High frequency switch-mode DC powered computer system |
-
2004
- 2004-01-30 CN CNB2004100393806A patent/CN100373755C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341278A (en) * | 1992-08-20 | 1994-08-23 | Brooks Steven W | Switching pulsed resonant DC-DC converter power amplifier |
| US6307757B1 (en) * | 1999-03-23 | 2001-10-23 | Advanced Energy Industries, Inc. | High frequency switch-mode DC powered computer system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777845B (en) * | 2008-12-26 | 2012-05-30 | 康舒科技股份有限公司 | High Efficiency Global Switching Power Supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1649232A (en) | 2005-08-03 |
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Assignee: Delta Electronics (Jiangsu) Ltd. Assignor: DELTA ELECTRONICS, Inc. Contract fulfillment period: 2008.1.1 to 2013.12.31 Contract record no.: 2009990000379 Denomination of invention: Variable connecting method AC/DC converter and its operation method Granted publication date: 20080305 License type: Exclusive license Record date: 20090428 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.1.1 TO 2013.12.31; CHANGE OF CONTRACT Name of requester: ZHONGDA ELECTRONICS (JIANGSU) CO., LTD. Effective date: 20090428 |
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